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| author | kib <kib@FreeBSD.org> | 2011-10-01 10:18:55 +0000 |
|---|---|---|
| committer | kib <kib@FreeBSD.org> | 2011-10-01 10:18:55 +0000 |
| commit | 71b9169fe9444b8207262f62c1b9396dfdbf3693 (patch) | |
| tree | 6839617c00146f79f5483b8a199a39a6ef17019f /sys/kern/kern_sig.c | |
| parent | 91bf568cd6ac3039b0005e4b0472bc318fa46fde (diff) | |
| download | FreeBSD-src-71b9169fe9444b8207262f62c1b9396dfdbf3693.zip FreeBSD-src-71b9169fe9444b8207262f62c1b9396dfdbf3693.tar.gz | |
The sigwait(3) function shall not return EINTR, according to the
POSIX/SUSvN. The sigwait(2) syscall does return EINTR, and libc.so.7
contains the wrapper sigwait(3) which hides EINTR from callers. The
EINTR return is used by libthr to handle required cancellation point
in the sigwait(3).
To help the binaries linked against pre-libc.so.7, i.e. RELENG_6 and
earlier, to have right ABI for sigwait(3), transform EINTR return from
sigwait(2) into ERESTART.
Discussed with: davidxu
MFC after: 1 week
Diffstat (limited to 'sys/kern/kern_sig.c')
| -rw-r--r-- | sys/kern/kern_sig.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/sys/kern/kern_sig.c b/sys/kern/kern_sig.c index 8622b41..188bf83 100644 --- a/sys/kern/kern_sig.c +++ b/sys/kern/kern_sig.c @@ -1094,6 +1094,8 @@ sys_sigwait(struct thread *td, struct sigwait_args *uap) error = kern_sigtimedwait(td, set, &ksi, NULL); if (error) { + if (error == EINTR && td->td_proc->p_osrel < P_OSREL_SIGWAIT) + error = ERESTART; if (error == ERESTART) return (error); td->td_retval[0] = error; |
