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comparison src/system.c @ 3153:94fc53d82561

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[project @ 1998-02-13 04:08:17 by jwe]
author jwe
date Fri, 13 Feb 1998 04:08:17 +0000
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3152:a34a56e2e567 3153:94fc53d82561
1 #if defined (__CYGWIN32__)
2
3 #include <sys/types.h>
4 #include <sys/wait.h>
5 #include <errno.h>
6 #include <signal.h>
7 #include <unistd.h>
8 #include <stdio.h>
9
10 int
11 system (const char *cmd)
12 {
13 pid_t pid;
14
15 int status = 1;
16
17 struct sigaction ignore, saved_sigint, saved_sigquit;
18
19 sigset_t child_mask, saved_mask;
20
21 if (cmd)
22 {
23 ignore.sa_handler = SIG_IGN;
24
25 sigemptyset (&ignore.sa_mask);
26
27 ignore.sa_flags = 0;
28
29 if (sigaction (SIGINT, &ignore, &saved_sigint) < 0)
30 return -1;
31
32 if (sigaction (SIGQUIT, &ignore, &saved_sigquit) < 0)
33 return -1;
34
35 sigemptyset (&child_mask);
36
37 sigaddset (&child_mask, SIGCHLD);
38
39 if (sigprocmask (SIG_BLOCK, &child_mask, &saved_mask) < 0)
40 return -1;
41
42 if ((pid = fork ()) < 0)
43 status = -1;
44 else if (pid == 0)
45 {
46 sigaction (SIGINT, &saved_sigint, 0);
47 sigaction (SIGQUIT, &saved_sigquit, 0);
48
49 sigprocmask (SIG_SETMASK, &saved_mask, 0);
50
51 execl ("/bin/sh", "sh", "-c", cmd, 0);
52
53 exit (127);
54 }
55 else
56 {
57 while (waitpid (pid, &status, 0) < 0)
58 {
59 if (errno != EINTR)
60 {
61 status = -1;
62 break;
63 }
64 }
65 }
66
67 if (sigaction (SIGINT, &saved_sigint, 0) < 0)
68 return -1;
69
70 if (sigaction (SIGQUIT, &saved_sigquit, 0) < 0)
71 return -1;
72
73 if (sigprocmask (SIG_SETMASK, &saved_mask, 0) < 0)
74 return -1;
75 }
76
77 return status;
78 }
79
80 #if defined (TEST)
81 int
82 main (void)
83 {
84 system ("info");
85 while (1)
86 {
87 printf ("foo-i-hithere\n");
88 sleep (1);
89 }
90 return 0;
91 }
92 #endif
93
94 #endif