| SIGHOLD(3) | Library Functions Manual | SIGHOLD(3) | 
sighold —
#include <signal.h>
int
  
  sighold(int
    sig);
The sighold() function adds the signal
    sig to the calling process' signal mask.
sighold() function returns 0.
  Otherwise -1 is returned and errno is set to indicate
  the error.
sighold() function will fail if:
EINVAL]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.
| April 30, 2010 | NetBSD 10.0 |