| Dees_Troy | 51a0e82 | 2012-09-05 15:24:24 -0400 | [diff] [blame] | 1 | /* $OpenBSD: system.c,v 1.8 2005/08/08 08:05:37 espie Exp $ */ |
| 2 | /* |
| 3 | * Copyright (c) 1988 The Regents of the University of California. |
| 4 | * All rights reserved. |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions |
| 8 | * are met: |
| 9 | * 1. Redistributions of source code must retain the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer. |
| 11 | * 2. Redistributions in binary form must reproduce the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer in the |
| 13 | * documentation and/or other materials provided with the distribution. |
| 14 | * 3. Neither the name of the University nor the names of its contributors |
| 15 | * may be used to endorse or promote products derived from this software |
| 16 | * without specific prior written permission. |
| 17 | * |
| 18 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 19 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 20 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 21 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 22 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 23 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 24 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 25 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 26 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 27 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 28 | * SUCH DAMAGE. |
| 29 | */ |
| 30 | |
| 31 | #include <sys/types.h> |
| 32 | #include <signal.h> |
| 33 | #include <stdlib.h> |
| 34 | #include <unistd.h> |
| 35 | #include <paths.h> |
| 36 | #include <sys/wait.h> |
| 37 | |
| 38 | #include "defines.h" |
| 39 | |
| 40 | extern char **environ; |
| 41 | |
| 42 | int |
| 43 | __system(const char *command) |
| 44 | { |
| 45 | pid_t pid; |
| 46 | sig_t intsave, quitsave; |
| 47 | sigset_t mask, omask; |
| 48 | int pstat; |
| 49 | char *argp[] = {"sh", "-c", NULL, NULL}; |
| 50 | |
| 51 | if (!command) /* just checking... */ |
| 52 | return(1); |
| 53 | |
| 54 | argp[2] = (char *)command; |
| 55 | |
| 56 | sigemptyset(&mask); |
| 57 | sigaddset(&mask, SIGCHLD); |
| 58 | sigprocmask(SIG_BLOCK, &mask, &omask); |
| 59 | switch (pid = vfork()) { |
| 60 | case -1: /* error */ |
| 61 | sigprocmask(SIG_SETMASK, &omask, NULL); |
| 62 | return(-1); |
| 63 | case 0: /* child */ |
| 64 | sigprocmask(SIG_SETMASK, &omask, NULL); |
| 65 | execve(_PATH_BSHELL, argp, environ); |
| 66 | _exit(127); |
| 67 | } |
| 68 | |
| Ethan Yonker | bcc502c | 2014-11-10 11:22:10 -0600 | [diff] [blame] | 69 | intsave = (sig_t) signal(SIGINT, SIG_IGN); |
| 70 | quitsave = (sig_t) signal(SIGQUIT, SIG_IGN); |
| Dees_Troy | 51a0e82 | 2012-09-05 15:24:24 -0400 | [diff] [blame] | 71 | pid = waitpid(pid, (int *)&pstat, 0); |
| 72 | sigprocmask(SIG_SETMASK, &omask, NULL); |
| Ethan Yonker | bcc502c | 2014-11-10 11:22:10 -0600 | [diff] [blame] | 73 | (void)signal(SIGINT, intsave); |
| 74 | (void)signal(SIGQUIT, quitsave); |
| Dees_Troy | 51a0e82 | 2012-09-05 15:24:24 -0400 | [diff] [blame] | 75 | return (pid == -1 ? -1 : pstat); |
| 76 | } |