| NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | CONFORMING TO | NOTES | SEE ALSO | COLOPHON | The Linux Programming Interface |
SIGPAUSE(3) Linux Programmer's Manual SIGPAUSE(3)
sigpause - atomically release blocked signals and wait for interrupt
#include <signal.h>
int sigpause(int sigmask); /* BSD */
int sigpause(int sig); /* System V / UNIX 95 */
Don't use this function. Use sigsuspend(2) instead.
The function sigpause() is designed to wait for some signal. It changes the
process's signal mask (set of blocked signals), and then waits for a signal to
arrive. Upon arrival of a signal, the original signal mask is restored.
If sigpause() returns, it was interrupted by a signal and the return value is
-1 with errno set to EINTR.
The System V version of sigpause() is standardized in POSIX.1-2001.
The classical BSD version of this function appeared in 4.2BSD. It sets the
process's signal mask to sigmask. UNIX 95 standardized the incompatible
System V version of this function, which removes only the specified signal sig
from the process's signal mask. The unfortunate situation with two
incompatible functions with the same name was solved by the sigsuspend(2)
function, that takes a sigset_t * argument (instead of an int).
On Linux, this routine is a system call only on the Sparc (sparc64)
architecture.
Libc4 and libc5 only know about the BSD version.
Glibc uses the BSD version if the _BSD_SOURCE feature test macro is defined
and none of _POSIX_SOURCE, _POSIX_C_SOURCE, _XOPEN_SOURCE, _GNU_SOURCE, or
_SVID_SOURCE is defined. Otherwise, the System V version is used.
kill(2), sigaction(2), sigprocmask(2), sigsuspend(2), sigblock(3), sigvec(3),
feature_test_macros(7)
This page is part of release 3.32 of the Linux man-pages project. A
description of the project, and information about reporting bugs, can be found
at http://www.kernel.org/doc/man-pages/.
Linux 2010-09-12 SIGPAUSE(3)
HTML rendering created 2010-12-03 by Michael Kerrisk, author of The Linux Programming Interface