netbsd man page for sighold

SIGHOLD(3)						   BSD 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
     This interface is made obsolete by sigprocmask(2).

     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.

SEE ALSO
     sigprocmask(2), sigrelse(3)

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.

BSD
								  April 30, 2010							       BSD