Return to mysig.c CVS log

Up to [local] / OpenXM / src / kan96xx / plugin

Annotation of OpenXM/src/kan96xx/plugin/mysig.c, Revision 1.4

1.4     ! takayama    1: /* $OpenXM: OpenXM/src/kan96xx/plugin/mysig.c,v 1.3 2016/03/30 21:34:03 takayama Exp $ */
1.1       takayama    2: #include <stdio.h>
                      3: #include <signal.h>
                      4: #include <unistd.h>
                      5: #include <setjmp.h>
                      6: #include <string.h>
                      7: #include "mysig.h"
                      8:
1.4     ! takayama    9: static void *Old_handler;
1.2       takayama   10: /*
                     11:   sigset SIGINT, SIGCHLD, SIGUSR1
                     12:  */
                     13: int unblock_signal(int sigset[]) {
1.1       takayama   14:   struct sigaction act;
                     15:   sigset_t set;
                     16:   sigset_t oldset;
1.2       takayama   17:   int i;
1.1       takayama   18:   sigemptyset(&set);
1.2       takayama   19:   for (i=0; sigset[i] > 0; i++) sigaddset(&set,sigset[i]);
1.1       takayama   20:   sigprocmask(SIG_UNBLOCK,&set,&oldset);
                     21:   return(0);
                     22: }
1.2       takayama   23: /* Add (or) blocked signals, see sigprocmask */
                     24: int block_signal(int sigset[]) {
                     25:   struct sigaction act;
                     26:   sigset_t set;
                     27:   sigset_t oldset;
                     28:   int i;
                     29:   sigemptyset(&set);
                     30:   for (i=0; sigset[i] > 0; i++) sigaddset(&set,sigset[i]);
                     31:   sigprocmask(SIG_BLOCK,&set,&oldset);
                     32:   return(0);
                     33: }
1.1       takayama   34:
1.2       takayama   35: int set_signal(int sig,void (*handler)(int m)) {
1.1       takayama   36:   struct sigaction act;
                     37:   struct sigaction oldact;
1.4     ! takayama   38:   int val;
1.1       takayama   39:   act.sa_handler=handler;
                     40:   act.sa_flags=0;
                     41:   act.sa_flags |= SA_RESTART;
                     42:   sigemptyset(&act.sa_mask);
1.4     ! takayama   43:   val=sigaction(sig,&act,&oldact);
        !            44:   Old_handler = oldact.sa_handler;
        !            45:   return(val);
1.1       takayama   46: }
1.4     ! takayama   47: /*
        !            48:   my own emulation of signal for portability.
        !            49:  */
        !            50: void *mysignal(int sig,void (*handler)(int m)) {
        !            51:   int sigset[2];
        !            52:   if (handler == SIG_IGN) {
        !            53:     /*    sigset[0] = sig; sigset[1]=0;
        !            54:     block_signal(sigset);
        !            55:     return(SIG_IGN);*/
        !            56:     return(signal(sig,handler));
        !            57:   }else if (handler == SIG_DFL) {
        !            58:     return(signal(sig,handler));
        !            59:   }
        !            60:   /* on unix system, you may simply call signal(3) here.  */
        !            61:   set_signal(sig,handler);
        !            62:   /* unblock is necessary on cygwin, ... */
        !            63:   sigset[0] = sig; sigset[1]=0; unblock_signal(sigset);
        !            64:   return((void *)Old_handler);
1.3       takayama   65: }
1.1       takayama   66:
                     67:
                     68:
                     69: