SIGHOLD(3) |
Library Functions Manual |
SIGHOLD(3) |
NAME
sighold — manipulate current signal mask
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <signal.h>
int
sighold(int sig);
DESCRIPTION
The sighold() function adds the signal sig to the calling process' signal mask.
RETURN VALUES
If successful, the sighold() function returns 0. Otherwise -1 is returned and errno is set to indicate the error.
ERRORS
The
sighold() function will fail if:
-
[EINVAL]
-
The argument sig is not a valid signal number.
STANDARDS
The sighold() function conforms to IEEE Std 1003.1-2001 (“POSIX.1”). It was however marked as obsolete in the IEEE Std 1003.1-2008 (“POSIX.1”) revision of the standard.