diff options
Diffstat (limited to 'src/vppinfra/unix-misc.c')
| -rw-r--r-- | src/vppinfra/unix-misc.c | 242 |
1 files changed, 242 insertions, 0 deletions
diff --git a/src/vppinfra/unix-misc.c b/src/vppinfra/unix-misc.c new file mode 100644 index 00000000000..2928369d52e --- /dev/null +++ b/src/vppinfra/unix-misc.c @@ -0,0 +1,242 @@ +/* + * Copyright (c) 2015 Cisco and/or its affiliates. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +/* + Copyright (c) 2005 Eliot Dresselhaus + + Permission is hereby granted, free of charge, to any person obtaining + a copy of this software and associated documentation files (the + "Software"), to deal in the Software without restriction, including + without limitation the rights to use, copy, modify, merge, publish, + distribute, sublicense, and/or sell copies of the Software, and to + permit persons to whom the Software is furnished to do so, subject to + the following conditions: + + The above copyright notice and this permission notice shall be + included in all copies or substantial portions of the Software. + + THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE + LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION + OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION + WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +*/ + +#include <vppinfra/error.h> +#include <vppinfra/os.h> +#include <vppinfra/unix.h> + +#include <sys/stat.h> +#include <sys/types.h> +#include <sys/uio.h> /* writev */ +#include <fcntl.h> +#include <stdio.h> /* for sprintf */ + +clib_error_t * +unix_file_n_bytes (char *file, uword * result) +{ + struct stat s; + + if (stat (file, &s) < 0) + return clib_error_return_unix (0, "stat `%s'", file); + + if (S_ISREG (s.st_mode)) + *result = s.st_size; + else + *result = 0; + + return /* no error */ 0; +} + +clib_error_t * +unix_file_read_contents (char *file, u8 * result, uword n_bytes) +{ + int fd = -1; + uword n_done, n_left; + clib_error_t *error = 0; + u8 *v = result; + + if ((fd = open (file, 0)) < 0) + return clib_error_return_unix (0, "open `%s'", file); + + n_left = n_bytes; + n_done = 0; + while (n_left > 0) + { + int n_read; + if ((n_read = read (fd, v + n_done, n_left)) < 0) + { + error = clib_error_return_unix (0, "open `%s'", file); + goto done; + } + + /* End of file. */ + if (n_read == 0) + break; + + n_left -= n_read; + n_done += n_read; + } + + if (n_left > 0) + { + error = + clib_error_return (0, + " `%s' expected to read %wd bytes; read only %wd", + file, n_bytes, n_bytes - n_left); + goto done; + } + +done: + close (fd); + return error; +} + +clib_error_t * +unix_file_contents (char *file, u8 ** result) +{ + uword n_bytes; + clib_error_t *error = 0; + u8 *v; + + if ((error = unix_file_n_bytes (file, &n_bytes))) + return error; + + v = 0; + vec_resize (v, n_bytes); + + error = unix_file_read_contents (file, v, n_bytes); + + if (error) + vec_free (v); + else + *result = v; + + return error; +} + +clib_error_t * +unix_proc_file_contents (char *file, u8 ** result) +{ + u8 *rv = 0; + uword pos; + int bytes, fd; + + /* Unfortunately, stat(/proc/XXX) returns zero... */ + fd = open (file, O_RDONLY); + + if (fd < 0) + return clib_error_return_unix (0, "open `%s'", file); + + vec_validate (rv, 4095); + pos = 0; + while (1) + { + bytes = read (fd, rv + pos, 4096); + if (bytes < 0) + { + close (fd); + vec_free (rv); + return clib_error_return_unix (0, "read '%s'", file); + } + + if (bytes == 0) + { + _vec_len (rv) = pos; + break; + } + pos += bytes; + vec_validate (rv, pos + 4095); + } + *result = rv; + close (fd); + return 0; +} + +void os_panic (void) __attribute__ ((weak)); + +void +os_panic (void) +{ + abort (); +} + +void os_exit (int) __attribute__ ((weak)); + +void +os_exit (int code) +{ + exit (code); +} + +void os_puts (u8 * string, uword string_length, uword is_error) + __attribute__ ((weak)); + +void +os_puts (u8 * string, uword string_length, uword is_error) +{ + int cpu = os_get_cpu_number (); + int ncpus = os_get_ncpus (); + char buf[64]; + int fd = is_error ? 2 : 1; + struct iovec iovs[2]; + int n_iovs = 0; + + if (ncpus > 1) + { + snprintf (buf, sizeof (buf), "%d: ", cpu); + + iovs[n_iovs].iov_base = buf; + iovs[n_iovs].iov_len = strlen (buf); + n_iovs++; + } + + iovs[n_iovs].iov_base = string; + iovs[n_iovs].iov_len = string_length; + n_iovs++; + + if (writev (fd, iovs, n_iovs) < 0) + ; +} + +void os_out_of_memory (void) __attribute__ ((weak)); +void +os_out_of_memory (void) +{ + os_panic (); +} + +uword os_get_cpu_number (void) __attribute__ ((weak)); +uword +os_get_cpu_number (void) +{ + return 0; +} + +uword os_get_ncpus (void) __attribute__ ((weak)); +uword +os_get_ncpus (void) +{ + return 1; +} + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |