NAME
sigpending - examine pending signals SYNOPSIS
#include
int sigpending(sigsett *set); Feature Test Macro Requirements for glibc (see featuretestmacros(7)): sigpending(): POSIXCSOURCE >= 1 || XOPENSOURCE || POSIXSOURCE DESCRIPTION sigpending() returns the set of signals that are pending for delivery to the calling thread (i.e., the signals which have been raised while blocked). The mask of pending signals is returned in set. RETURN VALUE sigpending() returns 0 on success and -1 on error. In the event of an error, errno is set to indicate the cause. ERRORS EFAULT set points to memory which is not a valid part of the process address space. CONFORMING TO
POSIX.1-2001. NOTES See sigsetops(3) for details on manipulating signal sets. The set of signals that is pending for a thread is the union of the set of signals that is pending for that thread and the set of signals that is pending for the process as a whole; see signal(7). A child created via fork(2) initially has an empty pending signal set; the pending signal set is preserved across an execve(2). BUGS In versions of glibc up to and including 2.2.1, there is a bug in the wrapper function for sigpending() which means that information about
pending real-time signals is not correctly returned. SEE ALSO kill(2), sigaction(2), signal(2), sigprocmask(2), sigsuspend(2), sigse‐ tops(3), signal(7) COLOPHON
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Linux 2013-04-19 SIGPENDING(2)