mirror of https://github.com/mkerrisk/man-pages
94 lines
2.5 KiB
Groff
94 lines
2.5 KiB
Groff
.\" Copyright (c) 2008, Linux Foundation, written by Michael Kerrisk
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.\" <mtk.manpages@gmail.com>
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.\"
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.\" Permission is granted to make and distribute verbatim copies of this
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.\" manual provided the copyright notice and this permission notice are
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.\" preserved on all copies.
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.\"
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.\" Permission is granted to copy and distribute modified versions of this
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.\" manual under the conditions for verbatim copying, provided that the
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.\" entire resulting derived work is distributed under the terms of a
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.\" permission notice identical to this one.
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.\"
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.\" Since the Linux kernel and libraries are constantly changing, this
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.\" manual page may be incorrect or out-of-date. The author(s) assume no
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.\" responsibility for errors or omissions, or for damages resulting from
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.\" the use of the information contained herein. The author(s) may not
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.\" have taken the same level of care in the production of this manual,
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.\" which is licensed free of charge, as they might when working
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.\" professionally.
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.\"
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.\" Formatted or processed versions of this manual, if unaccompanied by
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.\" the source, must acknowledge the copyright and authors of this work.
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.\"
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.TH SIGWAIT 3 2008-08-29 "Linux" "Linux Programmer's Manual"
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.SH NAME
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sigwait \- wait for a signal
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.SH SYNOPSIS
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.nf
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.B #include <signal.h>
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.BI " int sigwait(const sigset_t *" set ", int *" sig );
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.fi
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.sp
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.in -4n
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Feature Test Macro Requirements for glibc (see
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.BR feature_test_macros (7)):
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.in
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.sp
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.ad l
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.BR sigwait ():
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_POSIX_C_SOURCE\ >=\ 1 || _XOPEN_SOURCE || _POSIX_SOURCE
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.ad b
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.SH DESCRIPTION
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The
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.BR sigwait ()
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function suspends execution of the calling thread until the
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delivery of one of the signals specified in the signal set
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.IR set .
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The function accepts the signal
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(removes it from the pending list of signals),
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and returns the signal number in
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.IR sig .
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The operation of
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.BR sigwait ()
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is the same as
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.BR sigwaitinfo (),
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except that:
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.IP * 2
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.BR sigwait ()
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only returns the signal number, rather than a
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.I siginfo_t
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structure describing the signal.
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.IP *
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The return values of the two functions are different.
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.SH RETURN VALUE
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On success,
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.BR sigwait ()
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returns 0.
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On error, it returns a positive error number.
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.SH ERRORS
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.TP
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.B EINVAL
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.\" Does not occur for glibc.
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.I set
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contains an invalid signal number.
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.SH CONFORMING TO
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POSIX.1-2001.
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.SH NOTES
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.BR sigwait ()
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is implemented using
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.BR sigtimedwait (2).
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.SH EXAMPLES
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See
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.BR pthread_sigmask (3).
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.SH SEE ALSO
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.BR sigaction (2),
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.BR signalfd (2),
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.BR sigpending (2),
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.BR sigsuspend (2),
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.BR sigwaitinfo (2),
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.BR sigsetops (3),
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.BR signal (7)
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