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| /* | |
| * Copyright (C) 1996-2000 Michael R. Elkins <me@mutt.org> | |
| * | |
| * This program is free software; you can redistribute it and/or modify | |
| * it under the terms of the GNU General Public License as published by | |
| * the Free Software Foundation; either version 2 of the License, or | |
| * (at your option) any later version. | |
| * | |
| * This program is distributed in the hope that it will be useful, | |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| * GNU General Public License for more details. | |
| * | |
| * You should have received a copy of the GNU General Public License | |
| * along with this program; if not, write to the Free Software | |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. | |
| */ | |
| #if HAVE_CONFIG_H | |
| # include "config.h" | |
| #endif | |
| #include "mutt.h" | |
| #ifdef USE_IMAP | |
| # include "imap.h" | |
| # include <errno.h> | |
| #endif | |
| #include <stdlib.h> | |
| #include <signal.h> | |
| #include <string.h> | |
| #include <sys/wait.h> | |
| #include <unistd.h> | |
| int _mutt_system (const char *cmd, int flags) | |
| { | |
| int rc = -1; | |
| struct sigaction act; | |
| struct sigaction oldtstp; | |
| struct sigaction oldcont; | |
| sigset_t set; | |
| pid_t thepid; | |
| if (!cmd || !*cmd) | |
| return (0); | |
| /* must ignore SIGINT and SIGQUIT */ | |
| mutt_block_signals_system (); | |
| /* also don't want to be stopped right now */ | |
| if (flags & M_DETACH_PROCESS) | |
| { | |
| sigemptyset (&set); | |
| sigaddset (&set, SIGTSTP); | |
| sigprocmask (SIG_BLOCK, &set, NULL); | |
| } | |
| else | |
| { | |
| act.sa_handler = SIG_DFL; | |
| /* we want to restart the waitpid() below */ | |
| #ifdef SA_RESTART | |
| act.sa_flags = SA_RESTART; | |
| #endif | |
| sigemptyset (&act.sa_mask); | |
| sigaction (SIGTSTP, &act, &oldtstp); | |
| sigaction (SIGCONT, &act, &oldcont); | |
| } | |
| if ((thepid = fork ()) == 0) | |
| { | |
| act.sa_flags = 0; | |
| if (flags & M_DETACH_PROCESS) | |
| { | |
| int fd; | |
| /* give up controlling terminal */ | |
| setsid (); | |
| switch (fork ()) | |
| { | |
| case 0: | |
| #if defined(OPEN_MAX) | |
| for (fd = 0; fd < OPEN_MAX; fd++) | |
| close (fd); | |
| #elif defined(_POSIX_OPEN_MAX) | |
| for (fd = 0; fd < _POSIX_OPEN_MAX; fd++) | |
| close (fd); | |
| #else | |
| close (0); | |
| close (1); | |
| close (2); | |
| #endif | |
| chdir ("/"); | |
| act.sa_handler = SIG_DFL; | |
| sigaction (SIGCHLD, &act, NULL); | |
| break; | |
| case -1: | |
| _exit (127); | |
| default: | |
| _exit (0); | |
| } | |
| } | |
| /* reset signals for the child; not really needed, but... */ | |
| mutt_unblock_signals_system (0); | |
| act.sa_handler = SIG_DFL; | |
| act.sa_flags = 0; | |
| sigemptyset (&act.sa_mask); | |
| sigaction (SIGTERM, &act, NULL); | |
| sigaction (SIGTSTP, &act, NULL); | |
| sigaction (SIGCONT, &act, NULL); | |
| execl (EXECSHELL, "sh", "-c", cmd, NULL); | |
| _exit (127); /* execl error */ | |
| } | |
| else if (thepid != -1) | |
| { | |
| #ifndef USE_IMAP | |
| /* wait for the (first) child process to finish */ | |
| waitpid (thepid, &rc, 0); | |
| #else | |
| rc = imap_wait_keepalive (thepid); | |
| #endif | |
| } | |
| sigaction (SIGCONT, &oldcont, NULL); | |
| sigaction (SIGTSTP, &oldtstp, NULL); | |
| /* reset SIGINT, SIGQUIT and SIGCHLD */ | |
| mutt_unblock_signals_system (1); | |
| if (flags & M_DETACH_PROCESS) | |
| sigprocmask (SIG_UNBLOCK, &set, NULL); | |
| rc = (thepid != -1) ? (WIFEXITED (rc) ? WEXITSTATUS (rc) : -1) : -1; | |
| return (rc); | |
| } |