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NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUE | ATTRIBUTES | VERSIONS | STANDARDS | HISTORY | SEE ALSO | COLOPHON |
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sigpause(3) Library Functions Manual sigpause(3)
sigpause - atomically release blocked signals and wait for
interrupt
Standard C library (libc, -lc)
#include <signal.h>
[[deprecated]] int sigpause(int sigmask); /* BSD (but see VERSIONS) */
[[deprecated]] int sigpause(int sig); /* POSIX.1 / SysV / 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.
For an explanation of the terms used in this section, see
attributes(7).
┌──────────────────────────────────────┬───────────────┬─────────┐
│ Interface │ Attribute │ Value │
├──────────────────────────────────────┼───────────────┼─────────┤
│ sigpause() │ Thread safety │ MT-Safe │
└──────────────────────────────────────┴───────────────┴─────────┘
On Linux, this routine is a system call only on the Sparc
(sparc64) architecture.
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, and feature test macros
must be defined as follows to obtain the declaration:
• Since glibc 2.26: _XOPEN_SOURCE >= 500
• glibc 2.25 and earlier: _XOPEN_SOURCE
Since glibc 2.19, only the System V version is exposed by
<signal.h>; applications that formerly used the BSD sigpause()
should be amended to use sigsuspend(2).
POSIX.1-2008.
POSIX.1-2001. Obsoleted in POSIX.1-2008.
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).
kill(2), sigaction(2), sigprocmask(2), sigsuspend(2), sigblock(3),
sigvec(3), feature_test_macros(7)
This page is part of the man-pages (Linux kernel and C library
user-space interface documentation) project. Information about
the project can be found at
⟨https://www.kernel.org/doc/man-pages/⟩. If you have a bug report
for this manual page, see
⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
This page was obtained from the tarball man-pages-6.15.tar.gz
fetched from
⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on
2025-08-11. If you discover any rendering problems in this HTML
version of the page, or you believe there is a better or more up-
to-date source for the page, or you have corrections or
improvements to the information in this COLOPHON (which is not
part of the original manual page), send a mail to
man-pages@man7.org
Linux man-pages 6.15 2025-05-17 sigpause(3)
Pages that refer to this page: sigset(3), sigvec(3), signal-safety(7)
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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