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1 | /* |
2 | * Copyright (c) 1988 The Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
c0567266 KB |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions | |
7 | * are met: | |
8 | * 1. Redistributions of source code must retain the above copyright | |
9 | * notice, this list of conditions and the following disclaimer. | |
10 | * 2. Redistributions in binary form must reproduce the above copyright | |
11 | * notice, this list of conditions and the following disclaimer in the | |
12 | * documentation and/or other materials provided with the distribution. | |
13 | * 3. All advertising materials mentioning features or use of this software | |
14 | * must display the following acknowledgement: | |
15 | * This product includes software developed by the University of | |
16 | * California, Berkeley and its contributors. | |
17 | * 4. Neither the name of the University nor the names of its contributors | |
18 | * may be used to endorse or promote products derived from this software | |
19 | * without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
31 | * SUCH DAMAGE. | |
98295de1 KB |
32 | */ |
33 | ||
2ce81398 | 34 | #if defined(LIBC_SCCS) && !defined(lint) |
af359dea | 35 | static char sccsid[] = "@(#)system.c 5.10 (Berkeley) 2/23/91"; |
98295de1 | 36 | #endif /* LIBC_SCCS and not lint */ |
b8f253e8 | 37 | |
4d506f35 | 38 | #include <sys/types.h> |
98295de1 | 39 | #include <sys/signal.h> |
d9080451 KB |
40 | #include <sys/wait.h> |
41 | #include <stdlib.h> | |
f357e0f1 | 42 | #include <stddef.h> |
f0a345ab | 43 | #include <unistd.h> |
a2f3a875 | 44 | #include <paths.h> |
a59df51f | 45 | |
98295de1 | 46 | system(command) |
f0a345ab | 47 | const char *command; |
a59df51f | 48 | { |
4d506f35 | 49 | union wait pstat; |
f0a345ab | 50 | pid_t pid; |
a2f3a875 KB |
51 | int omask; |
52 | sig_t intsave, quitsave; | |
a59df51f | 53 | |
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54 | if (!command) /* just checking... */ |
55 | return(1); | |
56 | ||
db505a5a | 57 | omask = sigblock(sigmask(SIGCHLD)); |
98295de1 KB |
58 | switch(pid = vfork()) { |
59 | case -1: /* error */ | |
db505a5a | 60 | (void)sigsetmask(omask); |
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61 | pstat.w_status = 0; |
62 | pstat.w_retcode = 127; | |
63 | return(pstat.w_status); | |
98295de1 | 64 | case 0: /* child */ |
db505a5a | 65 | (void)sigsetmask(omask); |
a2f3a875 | 66 | execl(_PATH_BSHELL, "sh", "-c", command, (char *)NULL); |
a59df51f BJ |
67 | _exit(127); |
68 | } | |
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69 | intsave = signal(SIGINT, SIG_IGN); |
70 | quitsave = signal(SIGQUIT, SIG_IGN); | |
f0a345ab | 71 | pid = waitpid(pid, (int *)&pstat, 0); |
4d506f35 | 72 | (void)sigsetmask(omask); |
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73 | (void)signal(SIGINT, intsave); |
74 | (void)signal(SIGQUIT, quitsave); | |
4d506f35 | 75 | return(pid == -1 ? -1 : pstat.w_status); |
a59df51f | 76 | } |