diff options
author | Ben Magistro <koncept1@gmail.com> | 2022-04-17 09:45:02 -0400 |
---|---|---|
committer | Ben Magistro <koncept1@gmail.com> | 2022-04-20 21:30:13 -0400 |
commit | bf8c01bfcd015d43cfbcb893e48c6a83a95c91ec (patch) | |
tree | d4871f553a40aaed8cf98165f1e4f07584cfb95e /app/nginx/src/os/unix/ngx_process.c | |
parent | 862937c477a3d90798a5e4c4e84fc7c79aae52fe (diff) |
Drop nginxdev-mitm-proxy
Nginx is not part of the core library being developed and needs to
be moved to its own repository to allow it to be more easily
maintained.
Signed-off-by: Ben Magistro <koncept1@gmail.com>
Change-Id: I5639e84ba0564ccd49ffcffa7ec9fcd57827bd6d
Diffstat (limited to 'app/nginx/src/os/unix/ngx_process.c')
-rw-r--r-- | app/nginx/src/os/unix/ngx_process.c | 630 |
1 files changed, 0 insertions, 630 deletions
diff --git a/app/nginx/src/os/unix/ngx_process.c b/app/nginx/src/os/unix/ngx_process.c deleted file mode 100644 index 2d37e21..0000000 --- a/app/nginx/src/os/unix/ngx_process.c +++ /dev/null @@ -1,630 +0,0 @@ - -/* - * Copyright (C) Igor Sysoev - * Copyright (C) Nginx, Inc. - */ - - -#include <ngx_config.h> -#include <ngx_core.h> -#include <ngx_event.h> -#include <ngx_channel.h> - - -typedef struct { - int signo; - char *signame; - char *name; - void (*handler)(int signo); -} ngx_signal_t; - - - -static void ngx_execute_proc(ngx_cycle_t *cycle, void *data); -static void ngx_signal_handler(int signo); -static void ngx_process_get_status(void); -static void ngx_unlock_mutexes(ngx_pid_t pid); - - -int ngx_argc; -char **ngx_argv; -char **ngx_os_argv; - -ngx_int_t ngx_process_slot; -ngx_socket_t ngx_channel; -ngx_int_t ngx_last_process; -ngx_process_t ngx_processes[NGX_MAX_PROCESSES]; - - -ngx_signal_t signals[] = { - { ngx_signal_value(NGX_RECONFIGURE_SIGNAL), - "SIG" ngx_value(NGX_RECONFIGURE_SIGNAL), - "reload", - ngx_signal_handler }, - - { ngx_signal_value(NGX_REOPEN_SIGNAL), - "SIG" ngx_value(NGX_REOPEN_SIGNAL), - "reopen", - ngx_signal_handler }, - - { ngx_signal_value(NGX_NOACCEPT_SIGNAL), - "SIG" ngx_value(NGX_NOACCEPT_SIGNAL), - "", - ngx_signal_handler }, - - { ngx_signal_value(NGX_TERMINATE_SIGNAL), - "SIG" ngx_value(NGX_TERMINATE_SIGNAL), - "stop", - ngx_signal_handler }, - - { ngx_signal_value(NGX_SHUTDOWN_SIGNAL), - "SIG" ngx_value(NGX_SHUTDOWN_SIGNAL), - "quit", - ngx_signal_handler }, - - { ngx_signal_value(NGX_CHANGEBIN_SIGNAL), - "SIG" ngx_value(NGX_CHANGEBIN_SIGNAL), - "", - ngx_signal_handler }, - - { SIGALRM, "SIGALRM", "", ngx_signal_handler }, - - { SIGINT, "SIGINT", "", ngx_signal_handler }, - - { SIGIO, "SIGIO", "", ngx_signal_handler }, - - { SIGCHLD, "SIGCHLD", "", ngx_signal_handler }, - - { SIGSYS, "SIGSYS, SIG_IGN", "", SIG_IGN }, - - { SIGPIPE, "SIGPIPE, SIG_IGN", "", SIG_IGN }, - - { 0, NULL, "", NULL } -}; - - -ngx_pid_t -ngx_spawn_process(ngx_cycle_t *cycle, ngx_spawn_proc_pt proc, void *data, - char *name, ngx_int_t respawn) -{ - u_long on; - ngx_pid_t pid; - ngx_int_t s; - - if (respawn >= 0) { - s = respawn; - - } else { - for (s = 0; s < ngx_last_process; s++) { - if (ngx_processes[s].pid == -1) { - break; - } - } - - if (s == NGX_MAX_PROCESSES) { - ngx_log_error(NGX_LOG_ALERT, cycle->log, 0, - "no more than %d processes can be spawned", - NGX_MAX_PROCESSES); - return NGX_INVALID_PID; - } - } - - - if (respawn != NGX_PROCESS_DETACHED) { - - /* Solaris 9 still has no AF_LOCAL */ - - if (socketpair(AF_UNIX, SOCK_STREAM, 0, ngx_processes[s].channel) == -1) - { - ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, - "socketpair() failed while spawning \"%s\"", name); - return NGX_INVALID_PID; - } - - ngx_log_debug2(NGX_LOG_DEBUG_CORE, cycle->log, 0, - "channel %d:%d", - ngx_processes[s].channel[0], - ngx_processes[s].channel[1]); - - if (ngx_nonblocking(ngx_processes[s].channel[0]) == -1) { - ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, - ngx_nonblocking_n " failed while spawning \"%s\"", - name); - ngx_close_channel(ngx_processes[s].channel, cycle->log); - return NGX_INVALID_PID; - } - - if (ngx_nonblocking(ngx_processes[s].channel[1]) == -1) { - ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, - ngx_nonblocking_n " failed while spawning \"%s\"", - name); - ngx_close_channel(ngx_processes[s].channel, cycle->log); - return NGX_INVALID_PID; - } - - on = 1; - if (ioctl(ngx_processes[s].channel[0], FIOASYNC, &on) == -1) { - ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, - "ioctl(FIOASYNC) failed while spawning \"%s\"", name); - ngx_close_channel(ngx_processes[s].channel, cycle->log); - return NGX_INVALID_PID; - } - - if (fcntl(ngx_processes[s].channel[0], F_SETOWN, ngx_pid) == -1) { - ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, - "fcntl(F_SETOWN) failed while spawning \"%s\"", name); - ngx_close_channel(ngx_processes[s].channel, cycle->log); - return NGX_INVALID_PID; - } - - if (fcntl(ngx_processes[s].channel[0], F_SETFD, FD_CLOEXEC) == -1) { - ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, - "fcntl(FD_CLOEXEC) failed while spawning \"%s\"", - name); - ngx_close_channel(ngx_processes[s].channel, cycle->log); - return NGX_INVALID_PID; - } - - if (fcntl(ngx_processes[s].channel[1], F_SETFD, FD_CLOEXEC) == -1) { - ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, - "fcntl(FD_CLOEXEC) failed while spawning \"%s\"", - name); - ngx_close_channel(ngx_processes[s].channel, cycle->log); - return NGX_INVALID_PID; - } - - ngx_channel = ngx_processes[s].channel[1]; - - } else { - ngx_processes[s].channel[0] = -1; - ngx_processes[s].channel[1] = -1; - } - - ngx_process_slot = s; - - - pid = fork(); - - switch (pid) { - - case -1: - ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, - "fork() failed while spawning \"%s\"", name); - ngx_close_channel(ngx_processes[s].channel, cycle->log); - return NGX_INVALID_PID; - - case 0: - ngx_pid = ngx_getpid(); - proc(cycle, data); - break; - - default: - break; - } - - ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "start %s %P", name, pid); - - ngx_processes[s].pid = pid; - ngx_processes[s].exited = 0; - - if (respawn >= 0) { - return pid; - } - - ngx_processes[s].proc = proc; - ngx_processes[s].data = data; - ngx_processes[s].name = name; - ngx_processes[s].exiting = 0; - - switch (respawn) { - - case NGX_PROCESS_NORESPAWN: - ngx_processes[s].respawn = 0; - ngx_processes[s].just_spawn = 0; - ngx_processes[s].detached = 0; - break; - - case NGX_PROCESS_JUST_SPAWN: - ngx_processes[s].respawn = 0; - ngx_processes[s].just_spawn = 1; - ngx_processes[s].detached = 0; - break; - - case NGX_PROCESS_RESPAWN: - ngx_processes[s].respawn = 1; - ngx_processes[s].just_spawn = 0; - ngx_processes[s].detached = 0; - break; - - case NGX_PROCESS_JUST_RESPAWN: - ngx_processes[s].respawn = 1; - ngx_processes[s].just_spawn = 1; - ngx_processes[s].detached = 0; - break; - - case NGX_PROCESS_DETACHED: - ngx_processes[s].respawn = 0; - ngx_processes[s].just_spawn = 0; - ngx_processes[s].detached = 1; - break; - } - - if (s == ngx_last_process) { - ngx_last_process++; - } - - return pid; -} - - -ngx_pid_t -ngx_execute(ngx_cycle_t *cycle, ngx_exec_ctx_t *ctx) -{ - return ngx_spawn_process(cycle, ngx_execute_proc, ctx, ctx->name, - NGX_PROCESS_DETACHED); -} - - -static void -ngx_execute_proc(ngx_cycle_t *cycle, void *data) -{ - ngx_exec_ctx_t *ctx = data; - - if (execve(ctx->path, ctx->argv, ctx->envp) == -1) { - ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, - "execve() failed while executing %s \"%s\"", - ctx->name, ctx->path); - } - - exit(1); -} - - -ngx_int_t -ngx_init_signals(ngx_log_t *log) -{ - ngx_signal_t *sig; - struct sigaction sa; - - for (sig = signals; sig->signo != 0; sig++) { - ngx_memzero(&sa, sizeof(struct sigaction)); - sa.sa_handler = sig->handler; - sigemptyset(&sa.sa_mask); - if (sigaction(sig->signo, &sa, NULL) == -1) { -#if (NGX_VALGRIND) - ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, - "sigaction(%s) failed, ignored", sig->signame); -#else - ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, - "sigaction(%s) failed", sig->signame); - return NGX_ERROR; -#endif - } - } - - return NGX_OK; -} - - -static void -ngx_signal_handler(int signo) -{ - char *action; - ngx_int_t ignore; - ngx_err_t err; - ngx_signal_t *sig; - - ignore = 0; - - err = ngx_errno; - - for (sig = signals; sig->signo != 0; sig++) { - if (sig->signo == signo) { - break; - } - } - - ngx_time_sigsafe_update(); - - action = ""; - - switch (ngx_process) { - - case NGX_PROCESS_MASTER: - case NGX_PROCESS_SINGLE: - switch (signo) { - - case ngx_signal_value(NGX_SHUTDOWN_SIGNAL): - ngx_quit = 1; - action = ", shutting down"; - break; - - case ngx_signal_value(NGX_TERMINATE_SIGNAL): - case SIGINT: - ngx_terminate = 1; - action = ", exiting"; - break; - - case ngx_signal_value(NGX_NOACCEPT_SIGNAL): - if (ngx_daemonized) { - ngx_noaccept = 1; - action = ", stop accepting connections"; - } - break; - - case ngx_signal_value(NGX_RECONFIGURE_SIGNAL): - ngx_reconfigure = 1; - action = ", reconfiguring"; - break; - - case ngx_signal_value(NGX_REOPEN_SIGNAL): - ngx_reopen = 1; - action = ", reopening logs"; - break; - - case ngx_signal_value(NGX_CHANGEBIN_SIGNAL): - if (getppid() > 1 || ngx_new_binary > 0) { - - /* - * Ignore the signal in the new binary if its parent is - * not the init process, i.e. the old binary's process - * is still running. Or ignore the signal in the old binary's - * process if the new binary's process is already running. - */ - - action = ", ignoring"; - ignore = 1; - break; - } - - ngx_change_binary = 1; - action = ", changing binary"; - break; - - case SIGALRM: - ngx_sigalrm = 1; - break; - - case SIGIO: - ngx_sigio = 1; - break; - - case SIGCHLD: - ngx_reap = 1; - break; - } - - break; - - case NGX_PROCESS_WORKER: - case NGX_PROCESS_HELPER: - switch (signo) { - - case ngx_signal_value(NGX_NOACCEPT_SIGNAL): - if (!ngx_daemonized) { - break; - } - ngx_debug_quit = 1; - case ngx_signal_value(NGX_SHUTDOWN_SIGNAL): - ngx_quit = 1; - action = ", shutting down"; - break; - - case ngx_signal_value(NGX_TERMINATE_SIGNAL): - case SIGINT: - ngx_terminate = 1; - action = ", exiting"; - break; - - case ngx_signal_value(NGX_REOPEN_SIGNAL): - ngx_reopen = 1; - action = ", reopening logs"; - break; - - case ngx_signal_value(NGX_RECONFIGURE_SIGNAL): - case ngx_signal_value(NGX_CHANGEBIN_SIGNAL): - case SIGIO: - action = ", ignoring"; - break; - } - - break; - } - - ngx_log_error(NGX_LOG_NOTICE, ngx_cycle->log, 0, - "signal %d (%s) received%s", signo, sig->signame, action); - - if (ignore) { - ngx_log_error(NGX_LOG_CRIT, ngx_cycle->log, 0, - "the changing binary signal is ignored: " - "you should shutdown or terminate " - "before either old or new binary's process"); - } - - if (signo == SIGCHLD) { - ngx_process_get_status(); - } - - ngx_set_errno(err); -} - - -static void -ngx_process_get_status(void) -{ - int status; - char *process; - ngx_pid_t pid; - ngx_err_t err; - ngx_int_t i; - ngx_uint_t one; - - one = 0; - - for ( ;; ) { - pid = waitpid(-1, &status, WNOHANG); - - if (pid == 0) { - return; - } - - if (pid == -1) { - err = ngx_errno; - - if (err == NGX_EINTR) { - continue; - } - - if (err == NGX_ECHILD && one) { - return; - } - - /* - * Solaris always calls the signal handler for each exited process - * despite waitpid() may be already called for this process. - * - * When several processes exit at the same time FreeBSD may - * erroneously call the signal handler for exited process - * despite waitpid() may be already called for this process. - */ - - if (err == NGX_ECHILD) { - ngx_log_error(NGX_LOG_INFO, ngx_cycle->log, err, - "waitpid() failed"); - return; - } - - ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, err, - "waitpid() failed"); - return; - } - - - one = 1; - process = "unknown process"; - - for (i = 0; i < ngx_last_process; i++) { - if (ngx_processes[i].pid == pid) { - ngx_processes[i].status = status; - ngx_processes[i].exited = 1; - process = ngx_processes[i].name; - break; - } - } - - if (WTERMSIG(status)) { -#ifdef WCOREDUMP - ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0, - "%s %P exited on signal %d%s", - process, pid, WTERMSIG(status), - WCOREDUMP(status) ? " (core dumped)" : ""); -#else - ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0, - "%s %P exited on signal %d", - process, pid, WTERMSIG(status)); -#endif - - } else { - ngx_log_error(NGX_LOG_NOTICE, ngx_cycle->log, 0, - "%s %P exited with code %d", - process, pid, WEXITSTATUS(status)); - } - - if (WEXITSTATUS(status) == 2 && ngx_processes[i].respawn) { - ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0, - "%s %P exited with fatal code %d " - "and cannot be respawned", - process, pid, WEXITSTATUS(status)); - ngx_processes[i].respawn = 0; - } - - ngx_unlock_mutexes(pid); - } -} - - -static void -ngx_unlock_mutexes(ngx_pid_t pid) -{ - ngx_uint_t i; - ngx_shm_zone_t *shm_zone; - ngx_list_part_t *part; - ngx_slab_pool_t *sp; - - /* - * unlock the accept mutex if the abnormally exited process - * held it - */ - - if (ngx_accept_mutex_ptr) { - (void) ngx_shmtx_force_unlock(&ngx_accept_mutex, pid); - } - - /* - * unlock shared memory mutexes if held by the abnormally exited - * process - */ - - part = (ngx_list_part_t *) &ngx_cycle->shared_memory.part; - shm_zone = part->elts; - - for (i = 0; /* void */ ; i++) { - - if (i >= part->nelts) { - if (part->next == NULL) { - break; - } - part = part->next; - shm_zone = part->elts; - i = 0; - } - - sp = (ngx_slab_pool_t *) shm_zone[i].shm.addr; - - if (ngx_shmtx_force_unlock(&sp->mutex, pid)) { - ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0, - "shared memory zone \"%V\" was locked by %P", - &shm_zone[i].shm.name, pid); - } - } -} - - -void -ngx_debug_point(void) -{ - ngx_core_conf_t *ccf; - - ccf = (ngx_core_conf_t *) ngx_get_conf(ngx_cycle->conf_ctx, - ngx_core_module); - - switch (ccf->debug_points) { - - case NGX_DEBUG_POINTS_STOP: - raise(SIGSTOP); - break; - - case NGX_DEBUG_POINTS_ABORT: - ngx_abort(); - } -} - - -ngx_int_t -ngx_os_signal_process(ngx_cycle_t *cycle, char *name, ngx_pid_t pid) -{ - ngx_signal_t *sig; - - for (sig = signals; sig->signo != 0; sig++) { - if (ngx_strcmp(name, sig->name) == 0) { - if (kill(pid, sig->signo) != -1) { - return 0; - } - - ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, - "kill(%P, %d) failed", pid, sig->signo); - } - } - - return 1; -} |