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| author | Warner Losh <imp@FreeBSD.org> | 2022-07-02 19:39:24 +0000 |
|---|---|---|
| committer | Warner Losh <imp@FreeBSD.org> | 2022-07-02 19:41:46 +0000 |
| commit | ef86876b846e523e7ccc2940c37db4279db95d05 (patch) | |
| tree | 4c6f7ea9988fd330a8449324a49eb28fda1a2c61 | |
| parent | cf72911158d6fdff2ee524ee62a670d1d2282204 (diff) | |
| download | src-ef86876b846e523e7ccc2940c37db4279db95d05.tar.gz src-ef86876b846e523e7ccc2940c37db4279db95d05.zip | |
pselect(2): Document what a null pointer for the signalmask means
When pselect is passed a null pointer for the signal mask, the standard
says it shall behave like select (except for the different timeout
arg). Make a note of that here.
Sponsored by: Netflix
| -rw-r--r-- | lib/libc/sys/pselect.2 | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/lib/libc/sys/pselect.2 b/lib/libc/sys/pselect.2 index 6221c473e7d7..c8104b936319 100644 --- a/lib/libc/sys/pselect.2 +++ b/lib/libc/sys/pselect.2 @@ -28,7 +28,7 @@ .\" .\" $FreeBSD$ .\" -.Dd August 16, 2013 +.Dd July 2, 2022 .Dt PSELECT 2 .Os .Sh NAME @@ -66,7 +66,7 @@ argument in .Fn pselect points to a .Vt "const struct timespec" -rather than the (modifiable) +rather than the potentially modifiable .Vt "struct timeval" used by .Fn select ; @@ -81,6 +81,13 @@ specifies a signal mask which is set while waiting for input. When .Fn pselect returns, the original signal mask is restored. +If +.Fa newsigmask +is a null pointer, +.Fn pselect +behaves like +.Fn select +with no setting or restoration of the signal mask. .Pp See .Xr select 2 |