lib/bsdsignal.c

   1 /*
   2  * bsdsignal.c
   3  *
   4  * Use sigaction() to simulate BSD signal()
   5  */
   6
   7 #include "config.h"
   8
   9 void (*bsd_signal(int signum, void (*handler) (int))) (int) {
  10     struct sigaction action, oldaction;
  11
  12     memset(&action, 0, sizeof action);
  13     action.sa_handler = handler;
  14     sigemptyset(&action.sa_mask);
  15     sigaddset(&action.sa_mask, signum);
  16     action.sa_flags = SA_RESTART;
  17
  18     if (sigaction(signum, &action, &oldaction) == -1) {
  19 #ifdef SIG_ERR
  20         return SIG_ERR;
  21 #else
  22         return NULL;
  23 #endif
  24     }
  25
  26     return oldaction.sa_handler;
  27 }