Linux.com

sigpending.2

SIGPENDING

Section: Linux Programmer's Manual (2)
Updated: 2008-10-04
Index Return to Main Contents
 

NAME

sigpending - examine pending signals  

SYNOPSIS

#include <signal.h>

int sigpending(sigset_t *set);

Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

sigpending(): _POSIX_C_SOURCE >= 1 || _XOPEN_SOURCE || _POSIX_SOURCE  

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.  

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 threads that is peding 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), sigsetops(3), signal(7)  

COLOPHON

This page is part of release 3.21 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
CONFORMING TO
NOTES
BUGS
SEE ALSO
COLOPHON

 

Comments

Subscribe to Comments Feed

Upcoming Linux Foundation Courses

  1. LFS426 Linux Performance Tuning
    08 Sep » 11 Sep - New York
    Details
  2. LFS520 OpenStack Cloud Architecture and Deployment
    08 Sep » 11 Sep - Virtual
    Details
  3. LFD320 Linux Kernel Internals and Debugging
    15 Sep » 19 Sep - Virtual
    Details

View All Upcoming Courses

Become an Individual Member
Check out the Friday Funnies

Sign Up For the Linux.com Newsletter


Who we are ?

The Linux Foundation is a non-profit consortium dedicated to the growth of Linux.

More About the foundation...

Frequent Questions

Join / Linux Training / Board