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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 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. NetBSD 8.0 April 30, 2010 NetBSD 8.0