#include "tool_setup.h" #ifndef HAVE_LIBZ /* * NEVER EVER edit this manually, fix the mkhelp.pl script instead! * Generation time: Wed Sep 10 00:40:56 2014 */ #ifdef USE_MANUAL #include "tool_hugehelp.h" void hugehelp(void) { fputs( " _ _ ____ _\n" " Project ___| | | | _ \\| |\n" " / __| | | | |_) | |\n" " | (__| |_| | _ <| |___\n" " \\___|\\___/|_| \\_\\_____|\n" "\n" "NAME\n" " curl - transfer a URL\n" "\n" "SYNOPSIS\n" " curl [options] [URL...]\n" "\n" "DESCRIPTION\n" " curl is a tool to transfer data from or to a server, using one of the\n" " supported protocols (DICT, FILE, FTP, FTPS, GOPHER, HTTP, HTTPS, IMAP,\n" , stdout); fputs( " IMAPS, LDAP, LDAPS, POP3, POP3S, RTMP, RTSP, SCP, SFTP, SMTP, SMTPS,\n" " TELNET and TFTP). The command is designed to work without user inter-\n" " action.\n" "\n" " curl offers a busload of useful tricks like proxy support, user authen-\n" " tication, FTP upload, HTTP post, SSL connections, cookies, file trans-\n" " fer resume, Metalink, and more. As you will see below, the number of\n" " features will make your head spin!\n" "\n" , stdout); fputs( " curl is powered by libcurl for all transfer-related features. See\n" " libcurl(3) for details.\n" "\n" "URL\n" " The URL syntax is protocol-dependent. You'll find a detailed descrip-\n" " tion in RFC 3986.\n" "\n" " You can specify multiple URLs or parts of URLs by writing part sets\n" " within braces as in:\n" "\n" " http://site.{one,two,three}.com\n" "\n" " or you can get sequences of alphanumeric series by using [] as in:\n" "\n" " ftp://ftp.numericals.com/file[1-100].txt\n" , stdout); fputs( " ftp://ftp.numericals.com/file[001-100].txt (with leading zeros)\n" " ftp://ftp.letters.com/file[a-z].txt\n" "\n" " Nested sequences are not supported, but you can use several ones next\n" " to each other:\n" "\n" " http://any.org/archive[1996-1999]/vol[1-4]/part{a,b,c}.html\n" "\n" " You can specify any amount of URLs on the command line. They will be\n" " fetched in a sequential manner in the specified order.\n" "\n" , stdout); fputs( " You can specify a step counter for the ranges to get every Nth number\n" " or letter:\n" "\n" " http://www.numericals.com/file[1-100:10].txt\n" " http://www.letters.com/file[a-z:2].txt\n" "\n" " If you specify URL without protocol:// prefix, curl will attempt to\n" " guess what protocol you might want. It will then default to HTTP but\n" " try other protocols based on often-used host name prefixes. For exam-\n" , stdout); fputs( " ple, for host names starting with \"ftp.\" curl will assume you want to\n" " speak FTP.\n" "\n" " curl will do its best to use what you pass to it as a URL. It is not\n" " trying to validate it as a syntactically correct URL by any means but\n" " is instead very liberal with what it accepts.\n" "\n" " curl will attempt to re-use connections for multiple file transfers, so\n" " that getting many files from the same server will not do multiple con-\n" , stdout); fputs( " nects / handshakes. This improves speed. Of course this is only done on\n" " files specified on a single command line and cannot be used between\n" " separate curl invokes.\n" "\n" "PROGRESS METER\n" " curl normally displays a progress meter during operations, indicating\n" " the amount of transferred data, transfer speeds and estimated time\n" " left, etc.\n" "\n" " curl displays this data to the terminal by default, so if you invoke\n" , stdout); fputs( " curl to do an operation and it is about to write data to the terminal,\n" " it disables the progress meter as otherwise it would mess up the output\n" " mixing progress meter and response data.\n" "\n" " If you want a progress meter for HTTP POST or PUT requests, you need to\n" " redirect the response output to a file, using shell redirect (>), -o\n" " [file] or similar.\n" "\n" " It is not the same case for FTP upload as that operation does not spit\n" , stdout); fputs( " out any response data to the terminal.\n" "\n" " If you prefer a progress \"bar\" instead of the regular meter, -# is your\n" " friend.\n" "OPTIONS\n" " Options start with one or two dashes. Many of the options require an\n" " additional value next to them.\n" "\n" " The short \"single-dash\" form of the options, -d for example, may be\n" " used with or without a space between it and its value, although a space\n" , stdout); fputs( " is a recommended separator. The long \"double-dash\" form, --data for\n" " example, requires a space between it and its value.\n" "\n" " Short version options that don't need any additional values can be used\n" " immediately next to each other, like for example you can specify all\n" " the options -O, -L and -v at once as -OLv.\n" "\n" " In general, all boolean options are enabled with --option and yet again\n" , stdout); fputs( " disabled with --no-option. That is, you use the exact same option name\n" " but prefix it with \"no-\". However, in this list we mostly only list and\n" " show the --option version of them. (This concept with --no options was\n" " added in 7.19.0. Previously most options were toggled on/off on\n" " repeated use of the same command line option.)\n" "\n" " -#, --progress-bar\n" " Make curl display progress as a simple progress bar instead of\n" , stdout); fputs( " the standard, more informational, meter.\n" "\n" " -:, --next\n" " Tells curl to use a separate operation for the following URL and\n" " associated options. This allows you to send several URL\n" " requests, each with their own specific options, for example,\n" " such as different user names or custom requests for each. (Added\n" " in 7.36.0)\n" "\n" " -0, --http1.0\n" , stdout); fputs( " (HTTP) Tells curl to use HTTP version 1.0 instead of using its\n" " internally preferred: HTTP 1.1.\n" "\n" " --http1.1\n" " (HTTP) Tells curl to use HTTP version 1.1. This is the internal\n" " default version. (Added in 7.33.0)\n" "\n" " --http2\n" " (HTTP) Tells curl to issue its requests using HTTP 2. This\n" " requires that the underlying libcurl was built to support it.\n" " (Added in 7.33.0)\n" "\n" " --no-npn\n" , stdout); fputs( " Disable the NPN TLS extension. NPN is enabled by default if\n" " libcurl was built with an SSL library that supports NPN. NPN is\n" " used by a libcurl that supports HTTP 2 to negotiate HTTP 2 sup-\n" " port with the server during https sessions.\n" "\n" " (Added in 7.36.0)\n" "\n" " --no-alpn\n" " Disable the ALPN TLS extension. ALPN is enabled by default if\n" , stdout); fputs( " libcurl was built with an SSL library that supports ALPN. ALPN\n" " is used by a libcurl that supports HTTP 2 to negotiate HTTP 2\n" " support with the server during https sessions.\n" "\n" " (Added in 7.36.0)\n" "\n" " -1, --tlsv1\n" " (SSL) Forces curl to use TLS version 1.x when negotiating with a\n" " remote TLS server. You can use options --tlsv1.0, --tlsv1.1,\n" , stdout); fputs( " and --tlsv1.2 to control the TLS version more precisely (if the\n" " SSL backend in use supports such a level of control).\n" "\n" " -2, --sslv2\n" " (SSL) Forces curl to use SSL version 2 when negotiating with a\n" " remote SSL server.\n" "\n" " -3, --sslv3\n" " (SSL) Forces curl to use SSL version 3 when negotiating with a\n" " remote SSL server.\n" "\n" " -4, --ipv4\n" , stdout); fputs( " If curl is capable of resolving an address to multiple IP ver-\n" " sions (which it is if it is IPv6-capable), this option tells\n" " curl to resolve names to IPv4 addresses only.\n" "\n" " -6, --ipv6\n" " If curl is capable of resolving an address to multiple IP ver-\n" " sions (which it is if it is IPv6-capable), this option tells\n" " curl to resolve names to IPv6 addresses only.\n" "\n" " -a, --append\n" , stdout); fputs( " (FTP/SFTP) When used in an upload, this will tell curl to append\n" " to the target file instead of overwriting it. If the file\n" " doesn't exist, it will be created. Note that this flag is\n" " ignored by some SSH servers (including OpenSSH).\n" "\n" " -A, --user-agent \n" " (HTTP) Specify the User-Agent string to send to the HTTP server.\n" " Some badly done CGIs fail if this field isn't set to\n" , stdout); fputs( " \"Mozilla/4.0\". To encode blanks in the string, surround the\n" " string with single quote marks. This can also be set with the\n" " -H, --header option of course.\n" "\n" " If this option is used several times, the last one will be used.\n" "\n" " --anyauth\n" " (HTTP) Tells curl to figure out authentication method by itself,\n" " and use the most secure one the remote site claims to support.\n" , stdout); fputs( " This is done by first doing a request and checking the response-\n" " headers, thus possibly inducing an extra network round-trip.\n" " This is used instead of setting a specific authentication\n" " method, which you can do with --basic, --digest, --ntlm, and\n" " --negotiate.\n" "\n" " Note that using --anyauth is not recommended if you do uploads\n" , stdout); fputs( " from stdin, since it may require data to be sent twice and then\n" " the client must be able to rewind. If the need should arise when\n" " uploading from stdin, the upload operation will fail.\n" "\n" " -b, --cookie \n" " (HTTP) Pass the data to the HTTP server as a cookie. It is sup-\n" " posedly the data previously received from the server in a \"Set-\n" " Cookie:\" line. The data should be in the format \"NAME1=VALUE1;\n" , stdout); fputs( " NAME2=VALUE2\".\n" "\n" " If no '=' symbol is used in the line, it is treated as a file-\n" " name to use to read previously stored cookie lines from, which\n" " should be used in this session if they match. Using this method\n" " also activates the \"cookie parser\" which will make curl record\n" " incoming cookies too, which may be handy if you're using this in\n" , stdout); fputs( " combination with the -L, --location option. The file format of\n" " the file to read cookies from should be plain HTTP headers or\n" " the Netscape/Mozilla cookie file format.\n" "\n" " NOTE that the file specified with -b, --cookie is only used as\n" " input. No cookies will be stored in the file. To store cookies,\n" " use the -c, --cookie-jar option or you could even save the HTTP\n" , stdout); fputs( " headers to a file using -D, --dump-header!\n" "\n" " If this option is used several times, the last one will be used.\n" "\n" " -B, --use-ascii\n" " (FTP/LDAP) Enable ASCII transfer. For FTP, this can also be\n" " enforced by using an URL that ends with \";type=A\". This option\n" " causes data sent to stdout to be in text mode for win32 systems.\n" "\n" " --basic\n" " (HTTP) Tells curl to use HTTP Basic authentication. This is the\n" , stdout); fputs( " default and this option is usually pointless, unless you use it\n" " to override a previously set option that sets a different\n" " authentication method (such as --ntlm, --digest, or --negoti-\n" " ate).\n" "\n" " -c, --cookie-jar \n" " (HTTP) Specify to which file you want curl to write all cookies\n" " after a completed operation. Curl writes all cookies previously\n" , stdout); fputs( " read from a specified file as well as all cookies received from\n" " remote server(s). If no cookies are known, no file will be writ-\n" " ten. The file will be written using the Netscape cookie file\n" " format. If you set the file name to a single dash, \"-\", the\n" " cookies will be written to stdout.\n" "\n" " This command line option will activate the cookie engine that\n" , stdout); fputs( " makes curl record and use cookies. Another way to activate it is\n" " to use the -b, --cookie option.\n" "\n" " If the cookie jar can't be created or written to, the whole curl\n" " operation won't fail or even report an error clearly. Using -v\n" " will get a warning displayed, but that is the only visible feed-\n" " back you get about this possibly lethal situation.\n" "\n" , stdout); fputs( " If this option is used several times, the last specified file\n" " name will be used.\n" "\n" " -C, --continue-at \n" " Continue/Resume a previous file transfer at the given offset.\n" " The given offset is the exact number of bytes that will be\n" " skipped, counting from the beginning of the source file before\n" " it is transferred to the destination. If used with uploads, the\n" , stdout); fputs( " FTP server command SIZE will not be used by curl.\n" "\n" " Use \"-C -\" to tell curl to automatically find out where/how to\n" " resume the transfer. It then uses the given output/input files\n" " to figure that out.\n" "\n" " If this option is used several times, the last one will be used.\n" "\n" " --ciphers \n" " (SSL) Specifies which ciphers to use in the connection. The list\n" , stdout); fputs( " of ciphers must specify valid ciphers. Read up on SSL cipher\n" " list details on this URL:\n" " http://www.openssl.org/docs/apps/ciphers.html\n" "\n" " NSS ciphers are done differently than OpenSSL and GnuTLS. The\n" " full list of NSS ciphers is in the NSSCipherSuite entry at this\n" " URL: http://git.fedora-\n" , stdout); fputs( " hosted.org/cgit/mod_nss.git/plain/docs/mod_nss.html#Directives\n" "\n" " If this option is used several times, the last one will be used.\n" "\n" " --compressed\n" " (HTTP) Request a compressed response using one of the algorithms\n" " curl supports, and save the uncompressed document. If this\n" " option is used and the server sends an unsupported encoding,\n" " curl will report an error.\n" "\n" " --connect-timeout \n" , stdout); fputs( " Maximum time in seconds that you allow the connection to the\n" " server to take. This only limits the connection phase, once\n" " curl has connected this option is of no more use. Since 7.32.0,\n" " this option accepts decimal values, but the actual timeout will\n" " decrease in accuracy as the specified timeout increases in deci-\n" " mal precision. See also the -m, --max-time option.\n" "\n" , stdout); fputs( " If this option is used several times, the last one will be used.\n" "\n" " --create-dirs\n" " When used in conjunction with the -o option, curl will create\n" " the necessary local directory hierarchy as needed. This option\n" " creates the dirs mentioned with the -o option, nothing else. If\n" " the -o file name uses no dir or if the dirs it mentions already\n" " exist, no dir will be created.\n" "\n" , stdout); fputs( " To create remote directories when using FTP or SFTP, try --ftp-\n" " create-dirs.\n" "\n" " --crlf (FTP) Convert LF to CRLF in upload. Useful for MVS (OS/390).\n" "\n" " --crlfile \n" " (HTTPS/FTPS) Provide a file using PEM format with a Certificate\n" " Revocation List that may specify peer certificates that are to\n" " be considered revoked.\n" "\n" " If this option is used several times, the last one will be used.\n" "\n" , stdout); fputs( " (Added in 7.19.7)\n" " -d, --data \n" " (HTTP) Sends the specified data in a POST request to the HTTP\n" " server, in the same way that a browser does when a user has\n" " filled in an HTML form and presses the submit button. This will\n" " cause curl to pass the data to the server using the content-type\n" " application/x-www-form-urlencoded. Compare to -F, --form.\n" "\n" , stdout); fputs( " -d, --data is the same as --data-ascii. To post data purely\n" " binary, you should instead use the --data-binary option. To URL-\n" " encode the value of a form field you may use --data-urlencode.\n" "\n" " If any of these options is used more than once on the same com-\n" " mand line, the data pieces specified will be merged together\n" " with a separating &-symbol. Thus, using '-d name=daniel -d\n" , stdout); fputs( " skill=lousy' would generate a post chunk that looks like\n" " 'name=daniel&skill=lousy'.\n" "\n" " If you start the data with the letter @, the rest should be a\n" " file name to read the data from, or - if you want curl to read\n" " the data from stdin. Multiple files can also be specified. Post-\n" " ing data from a file named 'foobar' would thus be done with\n" , stdout); fputs( " --data @foobar. When --data is told to read from a file like\n" " that, carriage returns and newlines will be stripped out.\n" "\n" " -D, --dump-header \n" " Write the protocol headers to the specified file.\n" "\n" " This option is handy to use when you want to store the headers\n" " that an HTTP site sends to you. Cookies from the headers could\n" " then be read in a second curl invocation by using the -b,\n" , stdout); fputs( " --cookie option! The -c, --cookie-jar option is however a better\n" " way to store cookies.\n" "\n" " When used in FTP, the FTP server response lines are considered\n" " being \"headers\" and thus are saved there.\n" "\n" " If this option is used several times, the last one will be used.\n" "\n" " --data-ascii \n" " See -d, --data.\n" "\n" " --data-binary \n" " (HTTP) This posts data exactly as specified with no extra pro-\n" , stdout); fputs( " cessing whatsoever.\n" "\n" " If you start the data with the letter @, the rest should be a\n" " filename. Data is posted in a similar manner as --data-ascii\n" " does, except that newlines and carriage returns are preserved\n" " and conversions are never done.\n" "\n" " If this option is used several times, the ones following the\n" " first will append data as described in -d, --data.\n" "\n" " --data-urlencode \n" , stdout); fputs( " (HTTP) This posts data, similar to the other --data options with\n" " the exception that this performs URL-encoding. (Added in 7.18.0)\n" " To be CGI-compliant, the part should begin with a name\n" " followed by a separator and a content specification. The \n" " part can be passed to curl using one of the following syntaxes:\n" "\n" " content\n" " This will make curl URL-encode the content and pass that\n" , stdout); fputs( " on. Just be careful so that the content doesn't contain\n" " any = or @ symbols, as that will then make the syntax\n" " match one of the other cases below!\n" "\n" " =content\n" " This will make curl URL-encode the content and pass that\n" " on. The preceding = symbol is not included in the data.\n" "\n" " name=content\n" , stdout); fputs( " This will make curl URL-encode the content part and pass\n" " that on. Note that the name part is expected to be URL-\n" " encoded already.\n" "\n" " @filename\n" " This will make curl load data from the given file\n" " (including any newlines), URL-encode that data and pass\n" " it on in the POST.\n" "\n" " name@filename\n" , stdout); fputs( " This will make curl load data from the given file\n" " (including any newlines), URL-encode that data and pass\n" " it on in the POST. The name part gets an equal sign\n" " appended, resulting in name=urlencoded-file-content. Note\n" " that the name is expected to be URL-encoded already.\n" "\n" " --delegation LEVEL\n" " Set LEVEL to tell the server what it is allowed to delegate when\n" , stdout); fputs( " it comes to user credentials. Used with GSS/kerberos.\n" "\n" " none Don't allow any delegation.\n" "\n" " policy Delegates if and only if the OK-AS-DELEGATE flag is set\n" " in the Kerberos service ticket, which is a matter of\n" " realm policy.\n" "\n" " always Unconditionally allow the server to delegate.\n" "\n" " --digest\n" " (HTTP) Enables HTTP Digest authentication. This is an authenti-\n" , stdout); fputs( " cation scheme that prevents the password from being sent over\n" " the wire in clear text. Use this in combination with the normal\n" " -u, --user option to set user name and password. See also\n" " --ntlm, --negotiate and --anyauth for related options.\n" "\n" " If this option is used several times, only the first one is\n" " used.\n" "\n" " --disable-eprt\n" , stdout); fputs( " (FTP) Tell curl to disable the use of the EPRT and LPRT commands\n" " when doing active FTP transfers. Curl will normally always first\n" " attempt to use EPRT, then LPRT before using PORT, but with this\n" " option, it will use PORT right away. EPRT and LPRT are exten-\n" " sions to the original FTP protocol, and may not work on all\n" " servers, but they enable more functionality in a better way than\n" , stdout); fputs( " the traditional PORT command.\n" "\n" " --eprt can be used to explicitly enable EPRT again and --no-eprt\n" " is an alias for --disable-eprt.\n" "\n" " Disabling EPRT only changes the active behavior. If you want to\n" " switch to passive mode you need to not use -P, --ftp-port or\n" " force it with --ftp-pasv.\n" "\n" " --disable-epsv\n" " (FTP) Tell curl to disable the use of the EPSV command when\n" , stdout); fputs( " doing passive FTP transfers. Curl will normally always first\n" " attempt to use EPSV before PASV, but with this option, it will\n" " not try using EPSV.\n" "\n" " --epsv can be used to explicitly enable EPSV again and --no-epsv\n" " is an alias for --disable-epsv.\n" "\n" " Disabling EPSV only changes the passive behavior. If you want to\n" " switch to active mode you need to use -P, --ftp-port.\n" "\n" , stdout); fputs( " --dns-interface \n" " Tell curl to send outgoing DNS requests through .\n" " This option is a counterpart to --interface (which does not\n" " affect DNS). The supplied string must be an interface name (not\n" " an address).\n" "\n" " This option requires that libcurl was built with a resolver\n" " backend that supports this operation. The c-ares backend is the\n" , stdout); fputs( " only such one. (Added in 7.33.0)\n" "\n" " --dns-ipv4-addr \n" " Tell curl to bind to when making IPv4 DNS requests,\n" " so that the DNS requests originate from this address. The argu-\n" " ment should be a single IPv4 address.\n" "\n" " This option requires that libcurl was built with a resolver\n" " backend that supports this operation. The c-ares backend is the\n" , stdout); fputs( " only such one. (Added in 7.33.0)\n" "\n" " --dns-ipv6-addr \n" " Tell curl to bind to when making IPv6 DNS requests,\n" " so that the DNS requests originate from this address. The argu-\n" " ment should be a single IPv6 address.\n" "\n" " This option requires that libcurl was built with a resolver\n" " backend that supports this operation. The c-ares backend is the\n" , stdout); fputs( " only such one. (Added in 7.33.0)\n" "\n" " --dns-servers \n" " Set the list of DNS servers to be used instead of the system\n" " default. The list of IP addresses should be separated with com-\n" " mas. Port numbers may also optionally be given as :\n" " after each IP address.\n" "\n" " This option requires that libcurl was built with a resolver\n" , stdout); fputs( " backend that supports this operation. The c-ares backend is the\n" " only such one. (Added in 7.33.0)\n" "\n" " -e, --referer \n" " (HTTP) Sends the \"Referrer Page\" information to the HTTP server.\n" " This can also be set with the -H, --header flag of course. When\n" " used with -L, --location you can append \";auto\" to the --referer\n" " URL to make curl automatically set the previous URL when it fol-\n" , stdout); fputs( " lows a Location: header. The \";auto\" string can be used alone,\n" " even if you don't set an initial --referer.\n" "\n" " If this option is used several times, the last one will be used.\n" "\n" " -E, --cert \n" " (SSL) Tells curl to use the specified client certificate file\n" " when getting a file with HTTPS, FTPS or another SSL-based proto-\n" " col. The certificate must be in PKCS#12 format if using Secure\n" , stdout); fputs( " Transport, or PEM format if using any other engine. If the\n" " optional password isn't specified, it will be queried for on the\n" " terminal. Note that this option assumes a \"certificate\" file\n" " that is the private key and the private certificate concate-\n" " nated! See --cert and --key to specify them independently.\n" "\n" " If curl is built against the NSS SSL library then this option\n" , stdout); fputs( " can tell curl the nickname of the certificate to use within the\n" " NSS database defined by the environment variable SSL_DIR (or by\n" " default /etc/pki/nssdb). If the NSS PEM PKCS#11 module (lib-\n" " nsspem.so) is available then PEM files may be loaded. If you\n" " want to use a file from the current directory, please precede it\n" " with \"./\" prefix, in order to avoid confusion with a nickname.\n" , stdout); fputs( " If the nickname contains \":\", it needs to be preceded by \"\\\" so\n" " that it is not recognized as password delimiter. If the nick-\n" " name contains \"\\\", it needs to be escaped as \"\\\\\" so that it is\n" " not recognized as an escape character.\n" "\n" " (iOS and Mac OS X only) If curl is built against Secure Trans-\n" " port, then the certificate string can either be the name of a\n" , stdout); fputs( " certificate/private key in the system or user keychain, or the\n" " path to a PKCS#12-encoded certificate and private key. If you\n" " want to use a file from the current directory, please precede it\n" " with \"./\" prefix, in order to avoid confusion with a nickname.\n" "\n" " If this option is used several times, the last one will be used.\n" "\n" " --engine \n" " Select the OpenSSL crypto engine to use for cipher operations.\n" , stdout); fputs( " Use --engine list to print a list of build-time supported\n" " engines. Note that not all (or none) of the engines may be\n" " available at run-time.\n" "\n" " --environment\n" " (RISC OS ONLY) Sets a range of environment variables, using the\n" " names the -w option supports, to allow easier extraction of use-\n" " ful information after having run curl.\n" "\n" " --egd-file \n" , stdout); fputs( " (SSL) Specify the path name to the Entropy Gathering Daemon\n" " socket. The socket is used to seed the random engine for SSL\n" " connections. See also the --random-file option.\n" "\n" " --cert-type \n" " (SSL) Tells curl what certificate type the provided certificate\n" " is in. PEM, DER and ENG are recognized types. If not specified,\n" " PEM is assumed.\n" "\n" , stdout); fputs( " If this option is used several times, the last one will be used.\n" "\n" " --cacert \n" " (SSL) Tells curl to use the specified certificate file to verify\n" " the peer. The file may contain multiple CA certificates. The\n" " certificate(s) must be in PEM format. Normally curl is built to\n" " use a default file for this, so this option is typically used to\n" " alter that default file.\n" "\n" , stdout); fputs( " curl recognizes the environment variable named 'CURL_CA_BUNDLE'\n" " if it is set, and uses the given path as a path to a CA cert\n" " bundle. This option overrides that variable.\n" "\n" " The windows version of curl will automatically look for a CA\n" " certs file named 'curl-ca-bundle.crt', either in the same direc-\n" " tory as curl.exe, or in the Current Working Directory, or in any\n" " folder along your PATH.\n" "\n" , stdout); fputs( " If curl is built against the NSS SSL library, the NSS PEM\n" " PKCS#11 module (libnsspem.so) needs to be available for this\n" " option to work properly.\n" "\n" " If this option is used several times, the last one will be used.\n" "\n" " --capath \n" " (SSL) Tells curl to use the specified certificate directory to\n" " verify the peer. Multiple paths can be provided by separating\n" , stdout); fputs( " them with \":\" (e.g. \"path1:path2:path3\"). The certificates must\n" " be in PEM format, and if curl is built against OpenSSL, the\n" " directory must have been processed using the c_rehash utility\n" " supplied with OpenSSL. Using --capath can allow OpenSSL-powered\n" " curl to make SSL-connections much more efficiently than using\n" " --cacert if the --cacert file contains many CA certificates.\n" "\n" , stdout); fputs( " If this option is set, the default capath value will be ignored,\n" " and if it is used several times, the last one will be used.\n" "\n" " -f, --fail\n" " (HTTP) Fail silently (no output at all) on server errors. This\n" " is mostly done to better enable scripts etc to better deal with\n" " failed attempts. In normal cases when an HTTP server fails to\n" " deliver a document, it returns an HTML document stating so\n" , stdout); fputs( " (which often also describes why and more). This flag will pre-\n" " vent curl from outputting that and return error 22.\n" "\n" " This method is not fail-safe and there are occasions where non-\n" " successful response codes will slip through, especially when\n" " authentication is involved (response codes 401 and 407).\n" "\n" " -F, --form \n" " (HTTP) This lets curl emulate a filled-in form in which a user\n" , stdout); fputs( " has pressed the submit button. This causes curl to POST data\n" " using the Content-Type multipart/form-data according to RFC\n" " 2388. This enables uploading of binary files etc. To force the\n" " 'content' part to be a file, prefix the file name with an @\n" " sign. To just get the content part from a file, prefix the file\n" " name with the symbol <. The difference between @ and < is then\n" , stdout); fputs( " that @ makes a file get attached in the post as a file upload,\n" " while the < makes a text field and just get the contents for\n" " that text field from a file.\n" "\n" " Example, to send your password file to the server, where 'pass-\n" " word' is the name of the form-field to which /etc/passwd will be\n" " the input:\n" "\n" " curl -F password=@/etc/passwd www.mypasswords.com\n" "\n" , stdout); fputs( " To read content from stdin instead of a file, use - as the file-\n" " name. This goes for both @ and < constructs.\n" "\n" " You can also tell curl what Content-Type to use by using\n" " 'type=', in a manner similar to:\n" "\n" " curl -F \"web=@index.html;type=text/html\" url.com\n" "\n" " or\n" "\n" " curl -F \"name=daniel;type=text/foo\" url.com\n" "\n" " You can also explicitly change the name field of a file upload\n" , stdout); fputs( " part by setting filename=, like this:\n" "\n" " curl -F \"file=@localfile;filename=nameinpost\" url.com\n" "\n" " If filename/path contains ',' or ';', it must be quoted by dou-\n" " ble-quotes like:\n" "\n" " curl -F \"file=@\\\"localfile\\\";filename=\\\"nameinpost\\\"\" url.com\n" "\n" " or\n" "\n" " curl -F 'file=@\"localfile\";filename=\"nameinpost\"' url.com\n" "\n" " Note that if a filename/path is quoted by double-quotes, any\n" , stdout); fputs( " double-quote or backslash within the filename must be escaped by\n" " backslash.\n" "\n" " See further examples and details in the MANUAL.\n" "\n" " This option can be used multiple times.\n" "\n" " --ftp-account [data]\n" " (FTP) When an FTP server asks for \"account data\" after user name\n" " and password has been provided, this data is sent off using the\n" " ACCT command. (Added in 7.13.0)\n" "\n" , stdout); fputs( " If this option is used several times, the last one will be used.\n" "\n" " --ftp-alternative-to-user \n" " (FTP) If authenticating with the USER and PASS commands fails,\n" " send this command. When connecting to Tumbleweed's Secure\n" " Transport server over FTPS using a client certificate, using\n" " \"SITE AUTH\" will tell the server to retrieve the username from\n" " the certificate. (Added in 7.15.5)\n" "\n" , stdout); fputs( " --ftp-create-dirs\n" " (FTP/SFTP) When an FTP or SFTP URL/operation uses a path that\n" " doesn't currently exist on the server, the standard behavior of\n" " curl is to fail. Using this option, curl will instead attempt to\n" " create missing directories.\n" "\n" " --ftp-method [method]\n" " (FTP) Control what method curl should use to reach a file on an\n" " FTP(S) server. The method argument should be one of the follow-\n" , stdout); fputs( " ing alternatives:\n" "\n" " multicwd\n" " curl does a single CWD operation for each path part in\n" " the given URL. For deep hierarchies this means very many\n" " commands. This is how RFC 1738 says it should be done.\n" " This is the default but the slowest behavior.\n" "\n" " nocwd curl does no CWD at all. curl will do SIZE, RETR, STOR\n" , stdout); fputs( " etc and give a full path to the server for all these com-\n" " mands. This is the fastest behavior.\n" "\n" " singlecwd\n" " curl does one CWD with the full target directory and then\n" " operates on the file \"normally\" (like in the multicwd\n" " case). This is somewhat more standards compliant than\n" " 'nocwd' but without the full penalty of 'multicwd'.\n" " (Added in 7.15.1)\n" "\n" , stdout); fputs( " --ftp-pasv\n" " (FTP) Use passive mode for the data connection. Passive is the\n" " internal default behavior, but using this option can be used to\n" " override a previous -P/-ftp-port option. (Added in 7.11.0)\n" "\n" " If this option is used several times, only the first one is\n" " used. Undoing an enforced passive really isn't doable but you\n" " must then instead enforce the correct -P, --ftp-port again.\n" "\n" , stdout); fputs( " Passive mode means that curl will try the EPSV command first and\n" " then PASV, unless --disable-epsv is used.\n" "\n" " --ftp-skip-pasv-ip\n" " (FTP) Tell curl to not use the IP address the server suggests in\n" " its response to curl's PASV command when curl connects the data\n" " connection. Instead curl will re-use the same IP address it\n" " already uses for the control connection. (Added in 7.14.2)\n" "\n" , stdout); fputs( " This option has no effect if PORT, EPRT or EPSV is used instead\n" " of PASV.\n" "\n" " --ftp-pret\n" " (FTP) Tell curl to send a PRET command before PASV (and EPSV).\n" " Certain FTP servers, mainly drftpd, require this non-standard\n" " command for directory listings as well as up and downloads in\n" " PASV mode. (Added in 7.20.x)\n" "\n" " --ftp-ssl-ccc\n" , stdout); fputs( " (FTP) Use CCC (Clear Command Channel) Shuts down the SSL/TLS\n" " layer after authenticating. The rest of the control channel com-\n" " munication will be unencrypted. This allows NAT routers to fol-\n" " low the FTP transaction. The default mode is passive. See --ftp-\n" " ssl-ccc-mode for other modes. (Added in 7.16.1)\n" "\n" " --ftp-ssl-ccc-mode [active/passive]\n" , stdout); fputs( " (FTP) Use CCC (Clear Command Channel) Sets the CCC mode. The\n" " passive mode will not initiate the shutdown, but instead wait\n" " for the server to do it, and will not reply to the shutdown from\n" " the server. The active mode initiates the shutdown and waits for\n" " a reply from the server. (Added in 7.16.2)\n" "\n" " --ftp-ssl-control\n" " (FTP) Require SSL/TLS for the FTP login, clear for transfer.\n" , stdout); fputs( " Allows secure authentication, but non-encrypted data transfers\n" " for efficiency. Fails the transfer if the server doesn't sup-\n" " port SSL/TLS. (Added in 7.16.0) that can still be used but will\n" " be removed in a future version.\n" "\n" " --form-string \n" " (HTTP) Similar to --form except that the value string for the\n" " named parameter is used literally. Leading '@' and '<' charac-\n" , stdout); fputs( " ters, and the ';type=' string in the value have no special mean-\n" " ing. Use this in preference to --form if there's any possibility\n" " that the string value may accidentally trigger the '@' or '<'\n" " features of --form.\n" "\n" " -g, --globoff\n" " This option switches off the \"URL globbing parser\". When you set\n" " this option, you can specify URLs that contain the letters {}[]\n" , stdout); fputs( " without having them being interpreted by curl itself. Note that\n" " these letters are not normal legal URL contents but they should\n" " be encoded according to the URI standard.\n" "\n" " -G, --get\n" " When used, this option will make all data specified with -d,\n" " --data, --data-binary or --data-urlencode to be used in an HTTP\n" " GET request instead of the POST request that otherwise would be\n" , stdout); fputs( " used. The data will be appended to the URL with a '?' separator.\n" " If used in combination with -I, the POST data will instead be\n" " appended to the URL with a HEAD request.\n" "\n" " If this option is used several times, only the first one is\n" " used. This is because undoing a GET doesn't make sense, but you\n" " should then instead enforce the alternative method you prefer.\n" "\n" " -H, --header
\n" , stdout); fputs( " (HTTP) Extra header to include in the request when sending HTTP\n" " to a server. You may specify any number of extra headers. Note\n" " that if you should add a custom header that has the same name as\n" " one of the internal ones curl would use, your externally set\n" " header will be used instead of the internal one. This allows you\n" " to make even trickier stuff than curl would normally do. You\n" , stdout); fputs( " should not replace internally set headers without knowing per-\n" " fectly well what you're doing. Remove an internal header by giv-\n" " ing a replacement without content on the right side of the\n" " colon, as in: -H \"Host:\". If you send the custom header with no-\n" " value then its header must be terminated with a semicolon, such\n" " as -H \"X-Custom-Header;\" to send \"X-Custom-Header:\".\n" "\n" , stdout); fputs( " curl will make sure that each header you add/replace is sent\n" " with the proper end-of-line marker, you should thus not add that\n" " as a part of the header content: do not add newlines or carriage\n" " returns, they will only mess things up for you.\n" "\n" " See also the -A, --user-agent and -e, --referer options.\n" "\n" " Starting in 7.37.0, you need --proxy-header to send custom head-\n" " ers intended for a proxy.\n" "\n" , stdout); fputs( " Example:\n" "\n" " # curl -H \"X-First-Name: Joe\" http://192.168.0.1/\n" "\n" " This option can be used multiple times to add/replace/remove\n" " multiple headers.\n" "\n" " --hostpubmd5 \n" " (SCP/SFTP) Pass a string containing 32 hexadecimal digits. The\n" " string should be the 128 bit MD5 checksum of the remote host's\n" " public key, curl will refuse the connection with the host unless\n" , stdout); fputs( " the md5sums match. (Added in 7.17.1)\n" "\n" " --ignore-content-length\n" " (HTTP) Ignore the Content-Length header. This is particularly\n" " useful for servers running Apache 1.x, which will report incor-\n" " rect Content-Length for files larger than 2 gigabytes.\n" "\n" " -i, --include\n" " (HTTP) Include the HTTP-header in the output. The HTTP-header\n" " includes things like server-name, date of the document, HTTP-\n" , stdout); fputs( " version and more...\n" "\n" " -I, --head\n" " (HTTP/FTP/FILE) Fetch the HTTP-header only! HTTP-servers feature\n" " the command HEAD which this uses to get nothing but the header\n" " of a document. When used on an FTP or FILE file, curl displays\n" " the file size and last modification time only.\n" "\n" " --interface \n" " Perform an operation using a specified interface. You can enter\n" , stdout); fputs( " interface name, IP address or host name. An example could look\n" " like:\n" "\n" " curl --interface eth0:1 http://www.netscape.com/\n" "\n" " If this option is used several times, the last one will be used.\n" "\n" " -j, --junk-session-cookies\n" " (HTTP) When curl is told to read cookies from a given file, this\n" " option will make it discard all \"session cookies\". This will\n" , stdout); fputs( " basically have the same effect as if a new session is started.\n" " Typical browsers always discard session cookies when they're\n" " closed down.\n" "\n" " -J, --remote-header-name\n" " (HTTP) This option tells the -O, --remote-name option to use the\n" " server-specified Content-Disposition filename instead of\n" " extracting a filename from the URL.\n" "\n" , stdout); fputs( " There's no attempt to decode %-sequences (yet) in the provided\n" " file name, so this option may provide you with rather unexpected\n" " file names.\n" "\n" " -k, --insecure\n" " (SSL) This option explicitly allows curl to perform \"insecure\"\n" " SSL connections and transfers. All SSL connections are attempted\n" " to be made secure by using the CA certificate bundle installed\n" , stdout); fputs( " by default. This makes all connections considered \"insecure\"\n" " fail unless -k, --insecure is used.\n" "\n" " See this online resource for further details:\n" " http://curl.haxx.se/docs/sslcerts.html\n" "\n" " -K, --config \n" " Specify which config file to read curl arguments from. The con-\n" " fig file is a text file in which command line arguments can be\n" , stdout); fputs( " written which then will be used as if they were written on the\n" " actual command line.\n" "\n" " Options and their parameters must be specified on the same con-\n" " fig file line, separated by whitespace, colon, or the equals\n" " sign. Long option names can optionally be given in the config\n" " file without the initial double dashes and if so, the colon or\n" , stdout); fputs( " equals characters can be used as separators. If the option is\n" " specified with one or two dashes, there can be no colon or\n" " equals character between the option and its parameter.\n" "\n" " If the parameter is to contain whitespace, the parameter must be\n" " enclosed within quotes. Within double quotes, the following\n" " escape sequences are available: \\\\, \\\", \\t, \\n, \\r and \\v. A\n" , stdout); fputs( " backslash preceding any other letter is ignored. If the first\n" " column of a config line is a '#' character, the rest of the line\n" " will be treated as a comment. Only write one option per physical\n" " line in the config file.\n" "\n" " Specify the filename to -K, --config as '-' to make curl read\n" " the file from stdin.\n" "\n" " Note that to be able to specify a URL in the config file, you\n" , stdout); fputs( " need to specify it using the --url option, and not by simply\n" " writing the URL on its own line. So, it could look similar to\n" " this:\n" "\n" " url = \"http://curl.haxx.se/docs/\"\n" "\n" " When curl is invoked, it always (unless -q is used) checks for a\n" " default config file and uses it if found. The default config\n" " file is checked for in the following places in this order:\n" "\n" , stdout); fputs( " 1) curl tries to find the \"home dir\": It first checks for the\n" " CURL_HOME and then the HOME environment variables. Failing that,\n" " it uses getpwuid() on UNIX-like systems (which returns the home\n" " dir given the current user in your system). On Windows, it then\n" " checks for the APPDATA variable, or as a last resort the '%USER-\n" " PROFILE%\\Application Data'.\n" "\n" , stdout); fputs( " 2) On windows, if there is no _curlrc file in the home dir, it\n" " checks for one in the same dir the curl executable is placed. On\n" " UNIX-like systems, it will simply try to load .curlrc from the\n" " determined home dir.\n" "\n" " # --- Example file ---\n" " # this is a comment\n" " url = \"curl.haxx.se\"\n" " output = \"curlhere.html\"\n" " user-agent = \"superagent/1.0\"\n" "\n" , stdout); fputs( " # and fetch another URL too\n" " url = \"curl.haxx.se/docs/manpage.html\"\n" " -O\n" " referer = \"http://nowhereatall.com/\"\n" " # --- End of example file ---\n" "\n" " This option can be used multiple times to load multiple config\n" " files.\n" "\n" " --keepalive-time \n" " This option sets the time a connection needs to remain idle\n" , stdout); fputs( " before sending keepalive probes and the time between individual\n" " keepalive probes. It is currently effective on operating systems\n" " offering the TCP_KEEPIDLE and TCP_KEEPINTVL socket options\n" " (meaning Linux, recent AIX, HP-UX and more). This option has no\n" " effect if --no-keepalive is used. (Added in 7.18.0)\n" "\n" " If this option is used several times, the last one will be used.\n" , stdout); fputs( " If unspecified, the option defaults to 60 seconds.\n" "\n" " --key \n" " (SSL/SSH) Private key file name. Allows you to provide your pri-\n" " vate key in this separate file.\n" "\n" " If this option is used several times, the last one will be used.\n" "\n" " --key-type \n" " (SSL) Private key file type. Specify which type your --key pro-\n" " vided private key is. DER, PEM, and ENG are supported. If not\n" , stdout); fputs( " specified, PEM is assumed.\n" "\n" " If this option is used several times, the last one will be used.\n" "\n" " --krb \n" " (FTP) Enable Kerberos authentication and use. The level must be\n" " entered and should be one of 'clear', 'safe', 'confidential', or\n" " 'private'. Should you use a level that is not one of these,\n" " 'private' will instead be used.\n" "\n" , stdout); fputs( " This option requires a library built with kerberos4 support.\n" " This is not very common. Use -V, --version to see if your curl\n" " supports it.\n" "\n" " If this option is used several times, the last one will be used.\n" "\n" " -l, --list-only\n" " (FTP) When listing an FTP directory, this switch forces a name-\n" " only view. This is especially useful if the user wants to\n" , stdout); fputs( " machine-parse the contents of an FTP directory since the normal\n" " directory view doesn't use a standard look or format. When used\n" " like this, the option causes a NLST command to be sent to the\n" " server instead of LIST.\n" "\n" " Note: Some FTP servers list only files in their response to\n" " NLST; they do not include sub-directories and symbolic links.\n" "\n" , stdout); fputs( " (POP3) When retrieving a specific email from POP3, this switch\n" " forces a LIST command to be performed instead of RETR. This is\n" " particularly useful if the user wants to see if a specific mes-\n" " sage id exists on the server and what size it is.\n" "\n" " Note: When combined with -X, --request , this option\n" " can be used to send an UIDL command instead, so the user may use\n" , stdout); fputs( " the email's unique identifier rather than it's message id to\n" " make the request. (Added in 7.21.5)\n" "\n" " -L, --location\n" " (HTTP/HTTPS) If the server reports that the requested page has\n" " moved to a different location (indicated with a Location: header\n" " and a 3XX response code), this option will make curl redo the\n" " request on the new place. If used together with -i, --include or\n" , stdout); fputs( " -I, --head, headers from all requested pages will be shown. When\n" " authentication is used, curl only sends its credentials to the\n" " initial host. If a redirect takes curl to a different host, it\n" " won't be able to intercept the user+password. See also --loca-\n" " tion-trusted on how to change this. You can limit the amount of\n" " redirects to follow by using the --max-redirs option.\n" "\n" , stdout); fputs( " When curl follows a redirect and the request is not a plain GET\n" " (for example POST or PUT), it will do the following request with\n" " a GET if the HTTP response was 301, 302, or 303. If the response\n" " code was any other 3xx code, curl will re-send the following\n" " request using the same unmodified method.\n" "\n" " You can tell curl to not change the non-GET request method to\n" , stdout); fputs( " GET after a 30x response by using the dedicated options for\n" " that: --post301, --post302 and -post303.\n" "\n" " --libcurl \n" " Append this option to any ordinary curl command line, and you\n" " will get a libcurl-using C source code written to the file that\n" " does the equivalent of what your command-line operation does!\n" "\n" " If this option is used several times, the last given file name\n" , stdout); fputs( " will be used. (Added in 7.16.1)\n" "\n" " --limit-rate \n" " Specify the maximum transfer rate you want curl to use - for\n" " both downloads and uploads. This feature is useful if you have a\n" " limited pipe and you'd like your transfer not to use your entire\n" " bandwidth. To make it slower than it otherwise would be.\n" "\n" " The given speed is measured in bytes/second, unless a suffix is\n" , stdout); fputs( " appended. Appending 'k' or 'K' will count the number as kilo-\n" " bytes, 'm' or M' makes it megabytes, while 'g' or 'G' makes it\n" " gigabytes. Examples: 200K, 3m and 1G.\n" "\n" " The given rate is the average speed counted during the entire\n" " transfer. It means that curl might use higher transfer speeds in\n" " short bursts, but over time it uses no more than the given rate.\n" , stdout); fputs( " If you also use the -Y, --speed-limit option, that option will\n" " take precedence and might cripple the rate-limiting slightly, to\n" " help keeping the speed-limit logic working.\n" "\n" " If this option is used several times, the last one will be used.\n" "\n" " --local-port [-num]\n" " Set a preferred number or range of local port numbers to use for\n" " the connection(s). Note that port numbers by nature are a\n" , stdout); fputs( " scarce resource that will be busy at times so setting this range\n" " to something too narrow might cause unnecessary connection setup\n" " failures. (Added in 7.15.2)\n" "\n" " --location-trusted\n" " (HTTP/HTTPS) Like -L, --location, but will allow sending the\n" " name + password to all hosts that the site may redirect to. This\n" " may or may not introduce a security breach if the site redirects\n" , stdout); fputs( " you to a site to which you'll send your authentication info\n" " (which is plaintext in the case of HTTP Basic authentication).\n" "\n" " -m, --max-time \n" " Maximum time in seconds that you allow the whole operation to\n" " take. This is useful for preventing your batch jobs from hang-\n" " ing for hours due to slow networks or links going down. Since\n" , stdout); fputs( " 7.32.0, this option accepts decimal values, but the actual time-\n" " out will decrease in accuracy as the specified timeout increases\n" " in decimal precision. See also the --connect-timeout option.\n" "\n" " If this option is used several times, the last one will be used.\n" "\n" " --login-options \n" " Specify the login options to use during server authentication.\n" "\n" , stdout); fputs( " You can use the login options to specify protocol specific\n" " options that may be used during authentication. At present only\n" " IMAP, POP3 and SMTP support login options. For more information\n" " about the login options please see RFC 2384, RFC 5092 and IETF\n" " draft draft-earhart-url-smtp-00.txt (Added in 7.34.0).\n" "\n" " If this option is used several times, the last one will be used.\n" "\n" " --mail-auth
\n" , stdout); fputs( " (SMTP) Specify a single address. This will be used to specify\n" " the authentication address (identity) of a submitted message\n" " that is being relayed to another server.\n" "\n" " (Added in 7.25.0)\n" "\n" " --mail-from
\n" " (SMTP) Specify a single address that the given mail should get\n" " sent from.\n" "\n" " (Added in 7.20.0)\n" "\n" " --max-filesize \n" , stdout); fputs( " Specify the maximum size (in bytes) of a file to download. If\n" " the file requested is larger than this value, the transfer will\n" " not start and curl will return with exit code 63.\n" "\n" " NOTE: The file size is not always known prior to download, and\n" " for such files this option has no effect even if the file trans-\n" " fer ends up being larger than this given limit. This concerns\n" , stdout); fputs( " both FTP and HTTP transfers.\n" "\n" " --mail-rcpt
\n" " (SMTP) Specify a single address, user name or mailing list name.\n" " When performing a mail transfer, the recipient should specify a\n" " valid email address to send the mail to. (Added in 7.20.0)\n" "\n" " When performing an address verification (VRFY command), the\n" " recipient should be specified as the user name or user name and\n" , stdout); fputs( " domain (as per Section 3.5 of RFC5321). (Added in 7.34.0)\n" "\n" " When performing a mailing list expand (EXPN command), the recip-\n" " ient should be specified using the mailing list name, such as\n" " \"Friends\" or \"London-Office\". (Added in 7.34.0)\n" "\n" " --max-redirs \n" " Set maximum number of redirection-followings allowed. If -L,\n" " --location is used, this option can be used to prevent curl from\n" , stdout); fputs( " following redirections \"in absurdum\". By default, the limit is\n" " set to 50 redirections. Set this option to -1 to make it limit-\n" " less.\n" "\n" " If this option is used several times, the last one will be used.\n" "\n" " --metalink\n" " This option can tell curl to parse and process a given URI as\n" " Metalink file (both version 3 and 4 (RFC 5854) are supported)\n" , stdout); fputs( " and make use of the mirrors listed within for failover if there\n" " are errors (such as the file or server not being available). It\n" " will also verify the hash of the file after the download com-\n" " pletes. The Metalink file itself is downloaded and processed in\n" " memory and not stored in the local file system.\n" "\n" " Example to use a remote Metalink file:\n" "\n" , stdout); fputs( " curl --metalink http://www.example.com/example.metalink\n" "\n" " To use a Metalink file in the local file system, use FILE proto-\n" " col (file://):\n" "\n" " curl --metalink file://example.metalink\n" "\n" " Please note that if FILE protocol is disabled, there is no way\n" " to use a local Metalink file at the time of this writing. Also\n" " note that if --metalink and --include are used together,\n" , stdout); fputs( " --include will be ignored. This is because including headers in\n" " the response will break Metalink parser and if the headers are\n" " included in the file described in Metalink file, hash check will\n" " fail.\n" "\n" " (Added in 7.27.0, if built against the libmetalink library.)\n" "\n" " -n, --netrc\n" " Makes curl scan the .netrc (_netrc on Windows) file in the\n" , stdout); fputs( " user's home directory for login name and password. This is typi-\n" " cally used for FTP on UNIX. If used with HTTP, curl will enable\n" " user authentication. See netrc(4) or ftp(1) for details on the\n" " file format. Curl will not complain if that file doesn't have\n" " the right permissions (it should not be either world- or group-\n" " readable). The environment variable \"HOME\" is used to find the\n" , stdout); fputs( " home directory.\n" "\n" " A quick and very simple example of how to setup a .netrc to\n" " allow curl to FTP to the machine host.domain.com with user name\n" " 'myself' and password 'secret' should look similar to:\n" "\n" " machine host.domain.com login myself password secret\n" "\n" " -N, --no-buffer\n" " Disables the buffering of the output stream. In normal work sit-\n" , stdout); fputs( " uations, curl will use a standard buffered output stream that\n" " will have the effect that it will output the data in chunks, not\n" " necessarily exactly when the data arrives. Using this option\n" " will disable that buffering.\n" "\n" " Note that this is the negated option name documented. You can\n" " thus use --buffer to enforce the buffering.\n" "\n" " --netrc-file\n" , stdout); fputs( " This option is similar to --netrc, except that you provide the\n" " path (absolute or relative) to the netrc file that Curl should\n" " use. You can only specify one netrc file per invocation. If\n" " several --netrc-file options are provided, only the last one\n" " will be used. (Added in 7.21.5)\n" "\n" " This option overrides any use of --netrc as they are mutually\n" , stdout); fputs( " exclusive. It will also abide by --netrc-optional if specified.\n" "\n" " --netrc-optional\n" " Very similar to --netrc, but this option makes the .netrc usage\n" " optional and not mandatory as the --netrc option does.\n" "\n" " --negotiate\n" " (HTTP) Enables Negotiate (SPNEGO) authentication.\n" "\n" " If you want to enable Negotiate (SPNEGO) for proxy authentica-\n" " tion, then use --proxy-negotiate.\n" "\n" , stdout); fputs( " This option requires a library built with GSS-API or SSPI sup-\n" " port. Use -V, --version to see if your curl supports GSS-\n" " API/SSPI and SPNEGO.\n" "\n" " When using this option, you must also provide a fake -u, --user\n" " option to activate the authentication code properly. Sending a\n" " '-u :' is enough as the user name and password from the -u\n" " option aren't actually used.\n" "\n" , stdout); fputs( " If this option is used several times, only the first one is\n" " used.\n" "\n" " --no-keepalive\n" " Disables the use of keepalive messages on the TCP connection, as\n" " by default curl enables them.\n" "\n" " Note that this is the negated option name documented. You can\n" " thus use --keepalive to enforce keepalive.\n" "\n" " --no-sessionid\n" " (SSL) Disable curl's use of SSL session-ID caching. By default\n" , stdout); fputs( " all transfers are done using the cache. Note that while nothing\n" " should ever get hurt by attempting to reuse SSL session-IDs,\n" " there seem to be broken SSL implementations in the wild that may\n" " require you to disable this in order for you to succeed. (Added\n" " in 7.16.0)\n" "\n" " Note that this is the negated option name documented. You can\n" " thus use --sessionid to enforce session-ID caching.\n" "\n" , stdout); fputs( " --noproxy \n" " Comma-separated list of hosts which do not use a proxy, if one\n" " is specified. The only wildcard is a single * character, which\n" " matches all hosts, and effectively disables the proxy. Each name\n" " in this list is matched as either a domain which contains the\n" " hostname, or the hostname itself. For example, local.com would\n" , stdout); fputs( " match local.com, local.com:80, and www.local.com, but not\n" " www.notlocal.com. (Added in 7.19.4).\n" "\n" " --ntlm (HTTP) Enables NTLM authentication. The NTLM authentication\n" " method was designed by Microsoft and is used by IIS web servers.\n" " It is a proprietary protocol, reverse-engineered by clever peo-\n" " ple and implemented in curl based on their efforts. This kind of\n" , stdout); fputs( " behavior should not be endorsed, you should encourage everyone\n" " who uses NTLM to switch to a public and documented authentica-\n" " tion method instead, such as Digest.\n" "\n" " If you want to enable NTLM for your proxy authentication, then\n" " use --proxy-ntlm.\n" "\n" " This option requires a library built with SSL support. Use -V,\n" " --version to see if your curl supports NTLM.\n" "\n" , stdout); fputs( " If this option is used several times, only the first one is\n" " used.\n" "\n" " -o, --output \n" " Write output to instead of stdout. If you are using {} or\n" " [] to fetch multiple documents, you can use '#' followed by a\n" " number in the specifier. That variable will be replaced\n" " with the current string for the URL being fetched. Like in:\n" "\n" , stdout); fputs( " curl http://{one,two}.site.com -o \"file_#1.txt\"\n" "\n" " or use several variables like:\n" "\n" " curl http://{site,host}.host[1-5].com -o \"#1_#2\"\n" "\n" " You may use this option as many times as the number of URLs you\n" " have.\n" "\n" " See also the --create-dirs option to create the local directo-\n" " ries dynamically. Specifying the output as '-' (a single dash)\n" " will force the output to be done to stdout.\n" "\n" , stdout); fputs( " -O, --remote-name\n" " Write output to a local file named like the remote file we get.\n" " (Only the file part of the remote file is used, the path is cut\n" " off.)\n" "\n" " The remote file name to use for saving is extracted from the\n" " given URL, nothing else.\n" "\n" " Consequentially, the file will be saved in the current working\n" " directory. If you want the file saved in a different directory,\n" , stdout); fputs( " make sure you change current working directory before you invoke\n" " curl with the -O, --remote-name flag!\n" "\n" " There is no URL decoding done on the file name. If it has %20 or\n" " other URL encoded parts of the name, they will end up as-is as\n" " file name.\n" "\n" " You may use this option as many times as the number of URLs you\n" " have.\n" "\n" " --oauth2-bearer\n" , stdout); fputs( " (IMAP, POP3, SMTP) Specify the Bearer Token for OAUTH 2.0 server\n" " authentication. The Bearer Token is used in conjunction with the\n" " user name which can be specified as part of the --url or -u,\n" " --user options.\n" "\n" " The Bearer Token and user name are formatted according to RFC\n" " 6750.\n" "\n" " If this option is used several times, the last one will be used.\n" "\n" " --proxy-header
\n" , stdout); fputs( " (HTTP) Extra header to include in the request when sending HTTP\n" " to a proxy. You may specify any number of extra headers. This is\n" " the equivalent option to -H, --header but is for proxy communi-\n" " cation only like in CONNECT requests when you want a separate\n" " header sent to the proxy to what is sent to the actual remote\n" " host.\n" "\n" " curl will make sure that each header you add/replace is sent\n" , stdout); fputs( " with the proper end-of-line marker, you should thus not add that\n" " as a part of the header content: do not add newlines or carriage\n" " returns, they will only mess things up for you.\n" "\n" " Headers specified with this option will not be included in\n" " requests that curl knows will not be sent to a proxy.\n" "\n" " This option can be used multiple times to add/replace/remove\n" " multiple headers.\n" , stdout); fputs( " (Added in 7.37.0)\n" " -p, --proxytunnel\n" " When an HTTP proxy is used (-x, --proxy), this option will cause\n" " non-HTTP protocols to attempt to tunnel through the proxy\n" " instead of merely using it to do HTTP-like operations. The tun-\n" " nel approach is made with the HTTP proxy CONNECT request and\n" " requires that the proxy allows direct connect to the remote port\n" , stdout); fputs( " number curl wants to tunnel through to.\n" "\n" " -P, --ftp-port
\n" " (FTP) Reverses the default initiator/listener roles when con-\n" " necting with FTP. This switch makes curl use active mode. In\n" " practice, curl then tells the server to connect back to the\n" " client's specified address and port, while passive mode asks the\n" " server to setup an IP address and port for it to connect to.\n" , stdout); fputs( "
should be one of:\n" "\n" " interface\n" " i.e \"eth0\" to specify which interface's IP address you\n" " want to use (Unix only)\n" "\n" " IP address\n" " i.e \"192.168.10.1\" to specify the exact IP address\n" "\n" " host name\n" " i.e \"my.host.domain\" to specify the machine\n" "\n" " - make curl pick the same IP address that is already used\n" , stdout); fputs( " for the control connection\n" "\n" " If this option is used several times, the last one will be used. Dis-\n" " able the use of PORT with --ftp-pasv. Disable the attempt to use the\n" " EPRT command instead of PORT by using --disable-eprt. EPRT is really\n" " PORT++.\n" "\n" " Starting in 7.19.5, you can append \":[start]-[end]\" to the right of the\n" " address, to tell curl what TCP port range to use. That means you spec-\n" , stdout); fputs( " ify a port range, from a lower to a higher number. A single number\n" " works as well, but do note that it increases the risk of failure since\n" " the port may not be available.\n" "\n" " --pass \n" " (SSL/SSH) Passphrase for the private key\n" "\n" " If this option is used several times, the last one will be used.\n" "\n" " --post301\n" " (HTTP) Tells curl to respect RFC 2616/10.3.2 and not convert\n" , stdout); fputs( " POST requests into GET requests when following a 301 redirect-\n" " ion. The non-RFC behaviour is ubiquitous in web browsers, so\n" " curl does the conversion by default to maintain consistency.\n" " However, a server may require a POST to remain a POST after such\n" " a redirection. This option is meaningful only when using -L,\n" " --location (Added in 7.17.1)\n" "\n" " --post302\n" , stdout); fputs( " (HTTP) Tells curl to respect RFC 2616/10.3.2 and not convert\n" " POST requests into GET requests when following a 302 redirect-\n" " ion. The non-RFC behaviour is ubiquitous in web browsers, so\n" " curl does the conversion by default to maintain consistency.\n" " However, a server may require a POST to remain a POST after such\n" " a redirection. This option is meaningful only when using -L,\n" , stdout); fputs( " --location (Added in 7.19.1)\n" "\n" " --post303\n" " (HTTP) Tells curl to respect RFC 2616/10.3.2 and not convert\n" " POST requests into GET requests when following a 303 redirect-\n" " ion. The non-RFC behaviour is ubiquitous in web browsers, so\n" " curl does the conversion by default to maintain consistency.\n" " However, a server may require a POST to remain a POST after such\n" , stdout); fputs( " a redirection. This option is meaningful only when using -L,\n" " --location (Added in 7.26.0)\n" "\n" " --proto \n" " Tells curl to use the listed protocols for its initial\n" " retrieval. Protocols are evaluated left to right, are comma sep-\n" " arated, and are each a protocol name or 'all', optionally pre-\n" " fixed by zero or more modifiers. Available modifiers are:\n" "\n" , stdout); fputs( " + Permit this protocol in addition to protocols already permit-\n" " ted (this is the default if no modifier is used).\n" "\n" " - Deny this protocol, removing it from the list of protocols\n" " already permitted.\n" "\n" " = Permit only this protocol (ignoring the list already permit-\n" " ted), though subject to later modification by subsequent\n" " entries in the comma separated list.\n" "\n" , stdout); fputs( " For example:\n" "\n" " --proto -ftps uses the default protocols, but disables ftps\n" "\n" " --proto -all,https,+http\n" " only enables http and https\n" "\n" " --proto =http,https\n" " also only enables http and https\n" "\n" " Unknown protocols produce a warning. This allows scripts to\n" " safely rely on being able to disable potentially dangerous pro-\n" , stdout); fputs( " tocols, without relying upon support for that protocol being\n" " built into curl to avoid an error.\n" "\n" " This option can be used multiple times, in which case the effect\n" " is the same as concatenating the protocols into one instance of\n" " the option.\n" "\n" " (Added in 7.20.2)\n" "\n" " --proto-redir \n" " Tells curl to use the listed protocols after a redirect. See\n" , stdout); fputs( " --proto for how protocols are represented.\n" "\n" " (Added in 7.20.2)\n" "\n" " --proxy-anyauth\n" " Tells curl to pick a suitable authentication method when commu-\n" " nicating with the given proxy. This might cause an extra\n" " request/response round-trip. (Added in 7.13.2)\n" "\n" " --proxy-basic\n" " Tells curl to use HTTP Basic authentication when communicating\n" , stdout); fputs( " with the given proxy. Use --basic for enabling HTTP Basic with a\n" " remote host. Basic is the default authentication method curl\n" " uses with proxies.\n" "\n" " --proxy-digest\n" " Tells curl to use HTTP Digest authentication when communicating\n" " with the given proxy. Use --digest for enabling HTTP Digest with\n" " a remote host.\n" "\n" " --proxy-negotiate\n" , stdout); fputs( " Tells curl to use HTTP Negotiate (SPNEGO) authentication when\n" " communicating with the given proxy. Use --negotiate for enabling\n" " HTTP Negotiate (SPNEGO) with a remote host. (Added in 7.17.1)\n" "\n" " --proxy-ntlm\n" " Tells curl to use HTTP NTLM authentication when communicating\n" " with the given proxy. Use --ntlm for enabling NTLM with a remote\n" " host.\n" "\n" " --proxy1.0 \n" , stdout); fputs( " Use the specified HTTP 1.0 proxy. If the port number is not\n" " specified, it is assumed at port 1080.\n" "\n" " The only difference between this and the HTTP proxy option (-x,\n" " --proxy), is that attempts to use CONNECT through the proxy will\n" " specify an HTTP 1.0 protocol instead of the default HTTP 1.1.\n" "\n" " --pubkey \n" " (SSH) Public key file name. Allows you to provide your public\n" , stdout); fputs( " key in this separate file.\n" "\n" " If this option is used several times, the last one will be used.\n" "\n" " -q If used as the first parameter on the command line, the curlrc\n" " config file will not be read and used. See the -K, --config for\n" " details on the default config file search path.\n" "\n" " -Q, --quote \n" " (FTP/SFTP) Send an arbitrary command to the remote FTP or SFTP\n" , stdout); fputs( " server. Quote commands are sent BEFORE the transfer takes place\n" " (just after the initial PWD command in an FTP transfer, to be\n" " exact). To make commands take place after a successful transfer,\n" " prefix them with a dash '-'. To make commands be sent after\n" " curl has changed the working directory, just before the transfer\n" " command(s), prefix the command with a '+' (this is only sup-\n" , stdout); fputs( " ported for FTP). You may specify any number of commands. If the\n" " server returns failure for one of the commands, the entire oper-\n" " ation will be aborted. You must send syntactically correct FTP\n" " commands as RFC 959 defines to FTP servers, or one of the com-\n" " mands listed below to SFTP servers. This option can be used\n" " multiple times. When speaking to an FTP server, prefix the com-\n" , stdout); fputs( " mand with an asterisk (*) to make curl continue even if the com-\n" " mand fails as by default curl will stop at first failure.\n" "\n" " SFTP is a binary protocol. Unlike for FTP, curl interprets SFTP\n" " quote commands itself before sending them to the server. File\n" " names may be quoted shell-style to embed spaces or special char-\n" " acters. Following is the list of all supported SFTP quote com-\n" " mands:\n" "\n" , stdout); fputs( " chgrp group file\n" " The chgrp command sets the group ID of the file named by\n" " the file operand to the group ID specified by the group\n" " operand. The group operand is a decimal integer group ID.\n" "\n" " chmod mode file\n" " The chmod command modifies the file mode bits of the\n" " specified file. The mode operand is an octal integer mode\n" " number.\n" "\n" , stdout); fputs( " chown user file\n" " The chown command sets the owner of the file named by the\n" " file operand to the user ID specified by the user oper-\n" " and. The user operand is a decimal integer user ID.\n" "\n" " ln source_file target_file\n" " The ln and symlink commands create a symbolic link at the\n" " target_file location pointing to the source_file loca-\n" " tion.\n" "\n" , stdout); fputs( " mkdir directory_name\n" " The mkdir command creates the directory named by the\n" " directory_name operand.\n" "\n" " pwd The pwd command returns the absolute pathname of the cur-\n" " rent working directory.\n" "\n" " rename source target\n" " The rename command renames the file or directory named by\n" " the source operand to the destination path named by the\n" , stdout); fputs( " target operand.\n" "\n" " rm file\n" " The rm command removes the file specified by the file op-\n" " erand.\n" "\n" " rmdir directory\n" " The rmdir command removes the directory entry specified\n" " by the directory operand, provided it is empty.\n" "\n" " symlink source_file target_file\n" " See ln.\n" "\n" " -r, --range \n" , stdout); fputs( " (HTTP/FTP/SFTP/FILE) Retrieve a byte range (i.e a partial docu-\n" " ment) from a HTTP/1.1, FTP or SFTP server or a local FILE.\n" " Ranges can be specified in a number of ways.\n" "\n" " 0-499 specifies the first 500 bytes\n" "\n" " 500-999 specifies the second 500 bytes\n" "\n" " -500 specifies the last 500 bytes\n" "\n" " 9500- specifies the bytes from offset 9500 and forward\n" "\n" , stdout); fputs( " 0-0,-1 specifies the first and last byte only(*)(H)\n" "\n" " 500-700,600-799\n" " specifies 300 bytes from offset 500(H)\n" "\n" " 100-199,500-599\n" " specifies two separate 100-byte ranges(*)(H)\n" "\n" " (*) = NOTE that this will cause the server to reply with a multipart\n" " response!\n" "\n" " Only digit characters (0-9) are valid in the 'start' and 'stop' fields\n" , stdout); fputs( " of the 'start-stop' range syntax. If a non-digit character is given in\n" " the range, the server's response will be unspecified, depending on the\n" " server's configuration.\n" "\n" " You should also be aware that many HTTP/1.1 servers do not have this\n" " feature enabled, so that when you attempt to get a range, you'll\n" " instead get the whole document.\n" "\n" " FTP and SFTP range downloads only support the simple 'start-stop' syn-\n" , stdout); fputs( " tax (optionally with one of the numbers omitted). FTP use depends on\n" " the extended FTP command SIZE.\n" "\n" " If this option is used several times, the last one will be used.\n" "\n" " -R, --remote-time\n" " When used, this will make curl attempt to figure out the time-\n" " stamp of the remote file, and if that is available make the\n" " local file get that same timestamp.\n" "\n" " --random-file \n" , stdout); fputs( " (SSL) Specify the path name to file containing what will be con-\n" " sidered as random data. The data is used to seed the random\n" " engine for SSL connections. See also the --egd-file option.\n" "\n" " --raw (HTTP) When used, it disables all internal HTTP decoding of con-\n" " tent or transfer encodings and instead makes them passed on\n" " unaltered, raw. (Added in 7.16.2)\n" "\n" " --remote-name-all\n" , stdout); fputs( " This option changes the default action for all given URLs to be\n" " dealt with as if -O, --remote-name were used for each one. So if\n" " you want to disable that for a specific URL after --remote-name-\n" " all has been used, you must use \"-o -\" or --no-remote-name.\n" " (Added in 7.19.0)\n" "\n" " --resolve \n" " Provide a custom address for a specific host and port pair.\n" , stdout); fputs( " Using this, you can make the curl requests(s) use a specified\n" " address and prevent the otherwise normally resolved address to\n" " be used. Consider it a sort of /etc/hosts alternative provided\n" " on the command line. The port number should be the number used\n" " for the specific protocol the host will be used for. It means\n" " you need several entries if you want to provide address for the\n" , stdout); fputs( " same host but different ports.\n" "\n" " This option can be used many times to add many host names to\n" " resolve.\n" "\n" " (Added in 7.21.3)\n" "\n" " --retry \n" " If a transient error is returned when curl tries to perform a\n" " transfer, it will retry this number of times before giving up.\n" " Setting the number to 0 makes curl do no retries (which is the\n" , stdout); fputs( " default). Transient error means either: a timeout, an FTP 4xx\n" " response code or an HTTP 5xx response code.\n" "\n" " When curl is about to retry a transfer, it will first wait one\n" " second and then for all forthcoming retries it will double the\n" " waiting time until it reaches 10 minutes which then will be the\n" " delay between the rest of the retries. By using --retry-delay\n" , stdout); fputs( " you disable this exponential backoff algorithm. See also\n" " --retry-max-time to limit the total time allowed for retries.\n" " (Added in 7.12.3)\n" "\n" " If this option is used several times, the last one will be used.\n" "\n" " --retry-delay \n" " Make curl sleep this amount of time before each retry when a\n" " transfer has failed with a transient error (it changes the\n" , stdout); fputs( " default backoff time algorithm between retries). This option is\n" " only interesting if --retry is also used. Setting this delay to\n" " zero will make curl use the default backoff time. (Added in\n" " 7.12.3)\n" "\n" " If this option is used several times, the last one will be used.\n" "\n" " --retry-max-time \n" " The retry timer is reset before the first transfer attempt.\n" , stdout); fputs( " Retries will be done as usual (see --retry) as long as the timer\n" " hasn't reached this given limit. Notice that if the timer hasn't\n" " reached the limit, the request will be made and while perform-\n" " ing, it may take longer than this given time period. To limit a\n" " single request's maximum time, use -m, --max-time. Set this\n" " option to zero to not timeout retries. (Added in 7.12.3)\n" "\n" , stdout); fputs( " If this option is used several times, the last one will be used.\n" "\n" " -s, --silent\n" " Silent or quiet mode. Don't show progress meter or error mes-\n" " sages. Makes Curl mute. It will still output the data you ask\n" " for, potentially even to the terminal/stdout unless you redirect\n" " it.\n" "\n" " --sasl-ir\n" " Enable initial response in SASL authentication. (Added in\n" " 7.31.0)\n" "\n" " -S, --show-error\n" , stdout); fputs( " When used with -s it makes curl show an error message if it\n" " fails.\n" "\n" " --ssl (FTP, POP3, IMAP, SMTP) Try to use SSL/TLS for the connection.\n" " Reverts to a non-secure connection if the server doesn't support\n" " SSL/TLS. See also --ftp-ssl-control and --ssl-reqd for differ-\n" " ent levels of encryption required. (Added in 7.20.0)\n" "\n" " This option was formerly known as --ftp-ssl (Added in 7.11.0).\n" , stdout); fputs( " That option name can still be used but will be removed in a\n" " future version.\n" "\n" " --ssl-reqd\n" " (FTP, POP3, IMAP, SMTP) Require SSL/TLS for the connection.\n" " Terminates the connection if the server doesn't support SSL/TLS.\n" " (Added in 7.20.0)\n" "\n" " This option was formerly known as --ftp-ssl-reqd (added in\n" " 7.15.5). That option name can still be used but will be removed\n" , stdout); fputs( " in a future version.\n" "\n" " --ssl-allow-beast\n" " (SSL) This option tells curl to not work around a security flaw\n" " in the SSL3 and TLS1.0 protocols known as BEAST. If this option\n" " isn't used, the SSL layer may use workarounds known to cause\n" " interoperability problems with some older SSL implementations.\n" " WARNING: this option loosens the SSL security, and by using this\n" , stdout); fputs( " flag you ask for exactly that. (Added in 7.25.0)\n" "\n" " --socks4 \n" " Use the specified SOCKS4 proxy. If the port number is not speci-\n" " fied, it is assumed at port 1080. (Added in 7.15.2)\n" "\n" " This option overrides any previous use of -x, --proxy, as they\n" " are mutually exclusive.\n" "\n" " Since 7.21.7, this option is superfluous since you can specify a\n" , stdout); fputs( " socks4 proxy with -x, --proxy using a socks4:// protocol prefix.\n" " If this option is used several times, the last one will be used.\n" "\n" " --socks4a \n" " Use the specified SOCKS4a proxy. If the port number is not spec-\n" " ified, it is assumed at port 1080. (Added in 7.18.0)\n" "\n" " This option overrides any previous use of -x, --proxy, as they\n" " are mutually exclusive.\n" "\n" , stdout); fputs( " Since 7.21.7, this option is superfluous since you can specify a\n" " socks4a proxy with -x, --proxy using a socks4a:// protocol pre-\n" " fix.\n" "\n" " If this option is used several times, the last one will be used.\n" "\n" " --socks5-hostname \n" " Use the specified SOCKS5 proxy (and let the proxy resolve the\n" " host name). If the port number is not specified, it is assumed\n" , stdout); fputs( " at port 1080. (Added in 7.18.0)\n" "\n" " This option overrides any previous use of -x, --proxy, as they\n" " are mutually exclusive.\n" "\n" " Since 7.21.7, this option is superfluous since you can specify a\n" " socks5 hostname proxy with -x, --proxy using a socks5h:// proto-\n" " col prefix.\n" "\n" " If this option is used several times, the last one will be used.\n" , stdout); fputs( " (This option was previously wrongly documented and used as\n" " --socks without the number appended.)\n" "\n" " --socks5 \n" " Use the specified SOCKS5 proxy - but resolve the host name\n" " locally. If the port number is not specified, it is assumed at\n" " port 1080.\n" "\n" " This option overrides any previous use of -x, --proxy, as they\n" " are mutually exclusive.\n" "\n" , stdout); fputs( " Since 7.21.7, this option is superfluous since you can specify a\n" " socks5 proxy with -x, --proxy using a socks5:// protocol prefix.\n" " If this option is used several times, the last one will be used.\n" " (This option was previously wrongly documented and used as\n" " --socks without the number appended.)\n" "\n" " This option (as well as --socks4) does not work with IPV6, FTPS\n" " or LDAP.\n" "\n" , stdout); fputs( " --socks5-gssapi-service \n" " The default service name for a socks server is rcmd/server-fqdn.\n" " This option allows you to change it.\n" "\n" " Examples: --socks5 proxy-name --socks5-gssapi-service sockd\n" " would use sockd/proxy-name --socks5 proxy-name --socks5-gssapi-\n" " service sockd/real-name would use sockd/real-name for cases\n" " where the proxy-name does not match the principal name. (Added\n" , stdout); fputs( " in 7.19.4).\n" "\n" " --socks5-gssapi-nec\n" " As part of the GSS-API negotiation a protection mode is negoti-\n" " ated. RFC 1961 says in section 4.3/4.4 it should be protected,\n" " but the NEC reference implementation does not. The option\n" " --socks5-gssapi-nec allows the unprotected exchange of the pro-\n" " tection mode negotiation. (Added in 7.19.4).\n" "\n" " --stderr \n" , stdout); fputs( " Redirect all writes to stderr to the specified file instead. If\n" " the file name is a plain '-', it is instead written to stdout.\n" "\n" " If this option is used several times, the last one will be used.\n" "\n" " -t, --telnet-option \n" " Pass options to the telnet protocol. Supported options are:\n" "\n" " TTYPE= Sets the terminal type.\n" "\n" " XDISPLOC= Sets the X display location.\n" "\n" , stdout); fputs( " NEW_ENV= Sets an environment variable.\n" "\n" " -T, --upload-file \n" " This transfers the specified local file to the remote URL. If\n" " there is no file part in the specified URL, Curl will append the\n" " local file name. NOTE that you must use a trailing / on the last\n" " directory to really prove to Curl that there is no file name or\n" " curl will think that your last directory name is the remote file\n" , stdout); fputs( " name to use. That will most likely cause the upload operation to\n" " fail. If this is used on an HTTP(S) server, the PUT command will\n" " be used.\n" "\n" " Use the file name \"-\" (a single dash) to use stdin instead of a\n" " given file. Alternately, the file name \".\" (a single period)\n" " may be specified instead of \"-\" to use stdin in non-blocking\n" " mode to allow reading server output while stdin is being\n" , stdout); fputs( " uploaded.\n" "\n" " You can specify one -T for each URL on the command line. Each -T\n" " + URL pair specifies what to upload and to where. curl also sup-\n" " ports \"globbing\" of the -T argument, meaning that you can upload\n" " multiple files to a single URL by using the same URL globbing\n" " style supported in the URL, like this:\n" "\n" " curl -T \"{file1,file2}\" http://www.uploadtothissite.com\n" "\n" " or even\n" "\n" , stdout); fputs( " curl -T \"img[1-1000].png\" ftp://ftp.picturemania.com/upload/\n" "\n" " --tcp-nodelay\n" " Turn on the TCP_NODELAY option. See the curl_easy_setopt(3) man\n" " page for details about this option. (Added in 7.11.2)\n" "\n" " --tftp-blksize \n" " (TFTP) Set TFTP BLKSIZE option (must be >512). This is the block\n" " size that curl will try to use when transferring data to or from\n" " a TFTP server. By default 512 bytes will be used.\n" "\n" , stdout); fputs( " If this option is used several times, the last one will be used.\n" "\n" " (Added in 7.20.0)\n" "\n" " --tlsauthtype \n" " Set TLS authentication type. Currently, the only supported\n" " option is \"SRP\", for TLS-SRP (RFC 5054). If --tlsuser and\n" " --tlspassword are specified but --tlsauthtype is not, then this\n" " option defaults to \"SRP\". (Added in 7.21.4)\n" "\n" " --tlspassword \n" , stdout); fputs( " Set password for use with the TLS authentication method speci-\n" " fied with --tlsauthtype. Requires that --tlsuser also be set.\n" " (Added in 7.21.4)\n" "\n" " --tlsuser \n" " Set username for use with the TLS authentication method speci-\n" " fied with --tlsauthtype. Requires that --tlspassword also be\n" " set. (Added in 7.21.4)\n" "\n" " --tlsv1.0\n" , stdout); fputs( " (SSL) Forces curl to use TLS version 1.0 when negotiating with a\n" " remote TLS server. (Added in 7.34.0)\n" "\n" " --tlsv1.1\n" " (SSL) Forces curl to use TLS version 1.1 when negotiating with a\n" " remote TLS server. (Added in 7.34.0)\n" "\n" " --tlsv1.2\n" " (SSL) Forces curl to use TLS version 1.2 when negotiating with a\n" " remote TLS server. (Added in 7.34.0)\n" "\n" " --tr-encoding\n" , stdout); fputs( " (HTTP) Request a compressed Transfer-Encoding response using one\n" " of the algorithms curl supports, and uncompress the data while\n" " receiving it.\n" "\n" " (Added in 7.21.6)\n" "\n" " --trace \n" " Enables a full trace dump of all incoming and outgoing data,\n" " including descriptive information, to the given output file. Use\n" " \"-\" as filename to have the output sent to stdout.\n" "\n" , stdout); fputs( " This option overrides previous uses of -v, --verbose or --trace-\n" " ascii.\n" "\n" " If this option is used several times, the last one will be used.\n" "\n" " --trace-ascii \n" " Enables a full trace dump of all incoming and outgoing data,\n" " including descriptive information, to the given output file. Use\n" " \"-\" as filename to have the output sent to stdout.\n" "\n" , stdout); fputs( " This is very similar to --trace, but leaves out the hex part and\n" " only shows the ASCII part of the dump. It makes smaller output\n" " that might be easier to read for untrained humans.\n" "\n" " This option overrides previous uses of -v, --verbose or --trace.\n" " If this option is used several times, the last one will be used.\n" "\n" " --trace-time\n" " Prepends a time stamp to each trace or verbose line that curl\n" , stdout); fputs( " displays. (Added in 7.14.0)\n" "\n" " -u, --user \n" " Specify the user name and password to use for server authentica-\n" " tion. Overrides -n, --netrc and --netrc-optional.\n" "\n" " If you simply specify the user name, curl will prompt for a\n" " password.\n" "\n" " The user name and passwords are split up on the first colon,\n" " which makes it impossible to use a colon in the user name with\n" , stdout); fputs( " this option. The password can, still.\n" "\n" " When using Kerberos V5 with a Windows based server you should\n" " include the Windows domain name in the user name, in order for\n" " the server to succesfully obtain a Kerberos Ticket. If you don't\n" " then the initial authentication handshake may fail.\n" "\n" " When using NTLM, the user name can be specified simply as the\n" , stdout); fputs( " user name, without the domain, if there is a single domain and\n" " forest in your setup for example.\n" "\n" " To specify the domain name use either Down-Level Logon Name or\n" " UPN (User Principal Name) formats. For example, EXAMPLE\\user and\n" " user@example.com respectively.\n" "\n" " If you use a Windows SSPI-enabled curl binary and perform Ker-\n" " beros V5, Negotiate or NTLM authentication then you can tell\n" , stdout); fputs( " curl to select the user name and password from your environment\n" " by specifying a single colon with this option: \"-u :\".\n" "\n" " If this option is used several times, the last one will be used.\n" "\n" " -U, --proxy-user \n" " Specify the user name and password to use for proxy authentica-\n" " tion.\n" "\n" " If you use a Windows SSPI-enabled curl binary and do either\n" , stdout); fputs( " Negotiate or NTLM authentication then you can tell curl to\n" " select the user name and password from your environment by spec-\n" " ifying a single colon with this option: \"-U :\".\n" "\n" " If this option is used several times, the last one will be used.\n" "\n" " --url \n" " Specify a URL to fetch. This option is mostly handy when you\n" " want to specify URL(s) in a config file.\n" "\n" , stdout); fputs( " This option may be used any number of times. To control where\n" " this URL is written, use the -o, --output or the -O, --remote-\n" " name options.\n" " -v, --verbose\n" " Makes the fetching more verbose/talkative. Mostly useful for\n" " debugging. A line starting with '>' means \"header data\" sent by\n" " curl, '<' means \"header data\" received by curl that is hidden in\n" , stdout); fputs( " normal cases, and a line starting with '*' means additional info\n" " provided by curl.\n" "\n" " Note that if you only want HTTP headers in the output, -i,\n" " --include might be the option you're looking for.\n" "\n" " If you think this option still doesn't give you enough details,\n" " consider using --trace or --trace-ascii instead.\n" "\n" " This option overrides previous uses of --trace-ascii or --trace.\n" "\n" , stdout); fputs( " Use -s, --silent to make curl quiet.\n" "\n" " -w, --write-out \n" " Defines what to display on stdout after a completed and success-\n" " ful operation. The format is a string that may contain plain\n" " text mixed with any number of variables. The string can be spec-\n" " ified as \"string\", to get read from a particular file you spec-\n" " ify it \"@filename\" and to tell curl to read the format from\n" , stdout); fputs( " stdin you write \"@-\".\n" "\n" " The variables present in the output format will be substituted\n" " by the value or text that curl thinks fit, as described below.\n" " All variables are specified as %{variable_name} and to output a\n" " normal % you just write them as %%. You can output a newline by\n" " using \\n, a carriage return with \\r and a tab space with \\t.\n" "\n" , stdout); fputs( " NOTE: The %-symbol is a special symbol in the win32-environment,\n" " where all occurrences of % must be doubled when using this\n" " option.\n" "\n" " The variables available are:\n" "\n" " content_type The Content-Type of the requested document, if\n" " there was any.\n" "\n" " filename_effective\n" " The ultimate filename that curl writes out to.\n" , stdout); fputs( " This is only meaningful if curl is told to write\n" " to a file with the --remote-name or --output\n" " option. It's most useful in combination with the\n" " --remote-header-name option. (Added in 7.25.1)\n" "\n" " ftp_entry_path The initial path curl ended up in when logging on\n" " to the remote FTP server. (Added in 7.15.4)\n" "\n" , stdout); fputs( " http_code The numerical response code that was found in the\n" " last retrieved HTTP(S) or FTP(s) transfer. In\n" " 7.18.2 the alias response_code was added to show\n" " the same info.\n" "\n" " http_connect The numerical code that was found in the last\n" " response (from a proxy) to a curl CONNECT\n" " request. (Added in 7.12.4)\n" "\n" , stdout); fputs( " local_ip The IP address of the local end of the most\n" " recently done connection - can be either IPv4 or\n" " IPv6 (Added in 7.29.0)\n" "\n" " local_port The local port number of the most recently done\n" " connection (Added in 7.29.0)\n" "\n" " num_connects Number of new connects made in the recent trans-\n" " fer. (Added in 7.12.3)\n" "\n" , stdout); fputs( " num_redirects Number of redirects that were followed in the\n" " request. (Added in 7.12.3)\n" "\n" " redirect_url When an HTTP request was made without -L to fol-\n" " low redirects, this variable will show the actual\n" " URL a redirect would take you to. (Added in\n" " 7.18.2)\n" "\n" " remote_ip The remote IP address of the most recently done\n" , stdout); fputs( " connection - can be either IPv4 or IPv6 (Added in\n" " 7.29.0)\n" "\n" " remote_port The remote port number of the most recently done\n" " connection (Added in 7.29.0)\n" "\n" " size_download The total amount of bytes that were downloaded.\n" "\n" " size_header The total amount of bytes of the downloaded head-\n" " ers.\n" "\n" , stdout); fputs( " size_request The total amount of bytes that were sent in the\n" " HTTP request.\n" "\n" " size_upload The total amount of bytes that were uploaded.\n" "\n" " speed_download The average download speed that curl measured for\n" " the complete download. Bytes per second.\n" "\n" " speed_upload The average upload speed that curl measured for\n" " the complete upload. Bytes per second.\n" "\n" , stdout); fputs( " ssl_verify_result\n" " The result of the SSL peer certificate verifica-\n" " tion that was requested. 0 means the verification\n" " was successful. (Added in 7.19.0)\n" "\n" " time_appconnect\n" " The time, in seconds, it took from the start\n" " until the SSL/SSH/etc connect/handshake to the\n" , stdout); fputs( " remote host was completed. (Added in 7.19.0)\n" "\n" " time_connect The time, in seconds, it took from the start\n" " until the TCP connect to the remote host (or\n" " proxy) was completed.\n" "\n" " time_namelookup\n" " The time, in seconds, it took from the start\n" " until the name resolving was completed.\n" "\n" " time_pretransfer\n" , stdout); fputs( " The time, in seconds, it took from the start\n" " until the file transfer was just about to begin.\n" " This includes all pre-transfer commands and nego-\n" " tiations that are specific to the particular pro-\n" " tocol(s) involved.\n" "\n" " time_redirect The time, in seconds, it took for all redirection\n" , stdout); fputs( " steps include name lookup, connect, pretransfer\n" " and transfer before the final transaction was\n" " started. time_redirect shows the complete execu-\n" " tion time for multiple redirections. (Added in\n" " 7.12.3)\n" "\n" " time_starttransfer\n" " The time, in seconds, it took from the start\n" , stdout); fputs( " until the first byte was just about to be trans-\n" " ferred. This includes time_pretransfer and also\n" " the time the server needed to calculate the\n" " result.\n" "\n" " time_total The total time, in seconds, that the full opera-\n" " tion lasted. The time will be displayed with mil-\n" " lisecond resolution.\n" "\n" , stdout); fputs( " url_effective The URL that was fetched last. This is most mean-\n" " ingful if you've told curl to follow location:\n" " headers.\n" "\n" " If this option is used several times, the last one will be used.\n" "\n" " -x, --proxy <[protocol://][user:password@]proxyhost[:port]>\n" " Use the specified proxy.\n" "\n" " The proxy string can be specified with a protocol:// prefix to\n" , stdout); fputs( " specify alternative proxy protocols. Use socks4://, socks4a://,\n" " socks5:// or socks5h:// to request the specific SOCKS version to\n" " be used. No protocol specified, http:// and all others will be\n" " treated as HTTP proxies. (The protocol support was added in curl\n" " 7.21.7)\n" "\n" " If the port number is not specified in the proxy string, it is\n" " assumed to be 1080.\n" "\n" , stdout); fputs( " This option overrides existing environment variables that set\n" " the proxy to use. If there's an environment variable setting a\n" " proxy, you can set proxy to \"\" to override it.\n" "\n" " All operations that are performed over an HTTP proxy will trans-\n" " parently be converted to HTTP. It means that certain protocol\n" " specific operations might not be available. This is not the case\n" , stdout); fputs( " if you can tunnel through the proxy, as one with the -p, --prox-\n" " ytunnel option.\n" "\n" " User and password that might be provided in the proxy string are\n" " URL decoded by curl. This allows you to pass in special charac-\n" " ters such as @ by using %40 or pass in a colon with %3a.\n" "\n" " The proxy host can be specified the exact same way as the proxy\n" " environment variables, including the protocol prefix (http://)\n" , stdout); fputs( " and the embedded user + password.\n" "\n" " If this option is used several times, the last one will be used.\n" "\n" " -X, --request \n" " (HTTP) Specifies a custom request method to use when communicat-\n" " ing with the HTTP server. The specified request will be used\n" " instead of the method otherwise used (which defaults to GET).\n" " Read the HTTP 1.1 specification for details and explanations.\n" , stdout); fputs( " Common additional HTTP requests include PUT and DELETE, but\n" " related technologies like WebDAV offers PROPFIND, COPY, MOVE and\n" " more.\n" "\n" " Normally you don't need this option. All sorts of GET, HEAD,\n" " POST and PUT requests are rather invoked by using dedicated com-\n" " mand line options.\n" "\n" " This option only changes the actual word used in the HTTP\n" , stdout); fputs( " request, it does not alter the way curl behaves. So for example\n" " if you want to make a proper HEAD request, using -X HEAD will\n" " not suffice. You need to use the -I, --head option.\n" "\n" " (FTP) Specifies a custom FTP command to use instead of LIST when\n" " doing file lists with FTP.\n" "\n" " (POP3) Specifies a custom POP3 command to use instead of LIST or\n" " RETR. (Added in 7.26.0)\n" "\n" , stdout); fputs( " (IMAP) Specifies a custom IMAP command to use instead of LIST.\n" " (Added in 7.30.0)\n" "\n" " (SMTP) Specifies a custom SMTP command to use instead of HELP or\n" " VRFY. (Added in 7.34.0)\n" "\n" " If this option is used several times, the last one will be used.\n" "\n" " --xattr\n" " When saving output to a file, this option tells curl to store\n" " certain file metadata in extended file attributes. Currently,\n" , stdout); fputs( " the URL is stored in the xdg.origin.url attribute and, for HTTP,\n" " the content type is stored in the mime_type attribute. If the\n" " file system does not support extended attributes, a warning is\n" " issued.\n" "\n" " -y, --speed-time