freebsd man page for sigpending

SIGPENDING(2)						      BSD System Calls Manual						     SIGPENDING(2)

NAME
     sigpending -- get pending signals

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <signal.h>

     int
     sigpending(sigset_t *set);

DESCRIPTION
     The sigpending() system call returns a mask of the signals pending for delivery to the calling thread or the calling process in the location
     indicated by set.	Signals may be pending because they are currently masked, or transiently before delivery (although the latter case is not
     normally detectable).

RETURN VALUES
     The sigpending() function returns the value 0 if successful; otherwise the value -1 is returned and the global variable errno is set to indi-
     cate the error.

ERRORS
     The sigpending() system call will fail if:

     [EFAULT]		The set argument specified an invalid address.

SEE ALSO
     sigaction(2), sigprocmask(2), sigsuspend(2), sigsetops(3)

STANDARDS
     The sigpending() system call is expected to conform to ISO/IEC 9945-1:1990 (``POSIX.1'').

BSD
								 September 6, 2013							       BSD