sigpause(3) - Linux manual page (original) (raw)
sigpause(3) Library Functions Manual sigpause(3)
NAME top
sigpause - atomically release blocked signals and wait for
interruptLIBRARY top
Standard C library (_libc_, _-lc_)SYNOPSIS top
**#include <signal.h>**
**[[deprecated]] int sigpause(int** _sigmask_**); /* BSD (but see VERSIONS) */**
**[[deprecated]] int sigpause(int** _sig_**); /* POSIX.1 / SysV / UNIX 95 */**DESCRIPTION top
Don't use this function. Use [sigsuspend(2)](../man2/sigsuspend.2.html) 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.RETURN VALUE top
If **sigpause**() returns, it was interrupted by a signal and the
return value is -1 with _[errno](../man3/errno.3.html)_ set to **EINTR**.ATTRIBUTES top
For an explanation of the terms used in this section, see
[attributes(7)](../man7/attributes.7.html).
┌──────────────────────────────────────┬───────────────┬─────────┐
│ **Interface** │ **Attribute** │ **Value** │
├──────────────────────────────────────┼───────────────┼─────────┤
│ **sigpause**() │ Thread safety │ MT-Safe │
└──────────────────────────────────────┴───────────────┴─────────┘VERSIONS top
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)](../man2/sigsuspend.2.html).STANDARDS top
POSIX.1-2008.HISTORY top
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)](../man2/sigsuspend.2.html) function, that takes a
_sigsett *_ argument (instead of an _int_).SEE ALSO top
[kill(2)](../man2/kill.2.html), [sigaction(2)](../man2/sigaction.2.html), [sigprocmask(2)](../man2/sigprocmask.2.html), [sigsuspend(2)](../man2/sigsuspend.2.html), [sigblock(3)](../man3/sigblock.3.html),
[sigvec(3)](../man3/sigvec.3.html), [feature_test_macros(7)](../man7/feature%5Ftest%5Fmacros.7.html)COLOPHON top
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man-pages@man7.orgLinux man-pages 6.10 2024-07-23 sigpause(3)
Pages that refer to this page:sigset(3), sigvec(3), signal-safety(7)