sigpause — atomically release blocked signals and wait for interrupt
||but see NOTES) */ int sigpause(int sigmask
/* System V / UNIX 95 */
Don't use this function. Use sigsuspend(2) instead.
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.
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'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.
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
_XOPEN_SOURCE must be defined to obtain
the declaration). Since glibc 2.19, only the System V
version is exposed by
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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