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Commit | Line | Data |
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d0ab7780 | 1 | #include <stdio.h> |
3e1f480e | 2 | #include <stdlib.h> |
d0ab7780 UD |
3 | #include <unistd.h> |
4 | #include <error.h> | |
5 | #include <errno.h> | |
464d646f | 6 | #include <sys/wait.h> |
d0ab7780 | 7 | |
8f6a393e | 8 | void __attribute_noinline__ noop (void); |
d0ab7780 | 9 | |
d48f4d53 UD |
10 | #define NR 2 /* Exit code of the child. */ |
11 | ||
d0ab7780 UD |
12 | int |
13 | main (void) | |
14 | { | |
d48f4d53 UD |
15 | pid_t pid; |
16 | int status; | |
d0ab7780 UD |
17 | |
18 | printf ("Before vfork\n"); | |
19 | fflush (stdout); | |
20 | pid = vfork (); | |
21 | if (pid == 0) | |
22 | { | |
23 | /* This will clobber the return pc from vfork in the parent on | |
24 | machines where it is stored on the stack, if vfork wasn't | |
25 | implemented correctly, */ | |
26 | noop (); | |
d48f4d53 | 27 | _exit (NR); |
d0ab7780 UD |
28 | } |
29 | else if (pid < 0) | |
30 | error (1, errno, "vfork"); | |
31 | printf ("After vfork (parent)\n"); | |
d48f4d53 | 32 | if (waitpid (0, &status, 0) != pid |
b1195070 | 33 | || !WIFEXITED (status) || WEXITSTATUS (status) != NR) |
d48f4d53 | 34 | exit (1); |
bf4de8f3 AJ |
35 | |
36 | return 0; | |
d0ab7780 UD |
37 | } |
38 | ||
39 | void | |
60d2f8f3 | 40 | noop (void) |
d0ab7780 UD |
41 | { |
42 | } |