Section (3) sigpause
sigpause — atomically release blocked signals and wait for interrupt
||but see NOTES) */ int sigpause(int sigmask
/* System V / UNIX 95 */
Don_zsingle_quotesz_t use this function. Use sigsuspend(2) instead.
designed to wait for some signal. It changes the process_zsingle_quotesz_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.
sigpause() returns, it
was interrupted by a signal and the return value is −1
errno set to EINTR.
For an explanation of the terms used in this section, see attributes(7).
The System V version of
sigpause() is standardized in POSIX.1-2001.
It is also specified in POSIX.1-2008, where it is marked
The classical BSD version of this function appeared in
4.2BSD. It sets the process_zsingle_quotesz_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_zsingle_quotesz_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.
Glibc uses the BSD version if the
_BSD_SOURCE feature test macro is defined
and none of
_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
applications that formerly used the BSD
sigpause() should be amended to use
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Copyright (C) 2004 Andries Brouwer (aebcwi.nl)
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