diff options
Diffstat (limited to 'libc/sysdeps/linux/common/bits')
| -rw-r--r-- | libc/sysdeps/linux/common/bits/waitstatus.h | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/libc/sysdeps/linux/common/bits/waitstatus.h b/libc/sysdeps/linux/common/bits/waitstatus.h index 45d0fd3b4..33f39a84a 100644 --- a/libc/sysdeps/linux/common/bits/waitstatus.h +++ b/libc/sysdeps/linux/common/bits/waitstatus.h @@ -24,7 +24,7 @@ /* Everything extant so far uses these same bits. */ -/* If WIFEXITED(STATUS), the low-order 8 bits of the status. */ +/* If WIFEXITED(STATUS), the low-order 8 bits of exit(N). */ #define __WEXITSTATUS(status) (((status) & 0xff00) >> 8) /* If WIFSIGNALED(STATUS), the terminating signal. */ @@ -36,12 +36,20 @@ /* Nonzero if STATUS indicates normal termination. */ #define __WIFEXITED(status) (__WTERMSIG(status) == 0) -/* Nonzero if STATUS indicates termination by a signal. */ -#define __WIFSIGNALED(status) \ - (((signed char) (((status) & 0x7f) + 1) >> 1) > 0) +/* Nonzero if STATUS indicates termination by a signal. + * Note that status 0x007f is "died from signal 127", not "stopped by signal 0". + * This does happen on MIPS. + * The comparison is "< 0xff", not "< 0x7f", because WCOREDUMP bit (0x80) + * can be set too. + */ +#define __WIFSIGNALED(status) (((unsigned)((status) & 0xffff) - 1U) < 0xffU) /* Nonzero if STATUS indicates the child is stopped. */ +#if !defined(__mips__) #define __WIFSTOPPED(status) (((status) & 0xff) == 0x7f) +#else +#define __WIFSTOPPED(status) (((status) & 0xff) == 0x7f && ((status) & 0xff00)) +#endif /* Nonzero if STATUS indicates the child continued after a stop. We only define this if <bits/waitflags.h> provides the WCONTINUED flag bit. */ |