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Viewing changes to src/signal/sigset.c

  • Committer: Package Import Robot
  • Author(s): Kevin Bortis
  • Date: 2013-09-20 20:54:14 UTC
  • Revision ID: package-import@ubuntu.com-20130920205414-5b61trtmma18w58o
Tags: upstream-0.9.13
Import upstream version 0.9.13

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src/signal/sigset.c
 
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#include <signal.h>
 
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#include <stdlib.h>
 
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void (*sigset(int sig, void (*handler)(int)))(int)
 
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{
 
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        struct sigaction sa, sa_old;
 
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        sigset_t mask;
 
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        sigemptyset(&mask);
 
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        if (sigaddset(&mask, sig) < 0)
 
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                return SIG_ERR;
 
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        if (handler == SIG_HOLD) {
 
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                if (sigaction(sig, NULL, &sa_old) < 0)
 
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                        return SIG_ERR;
 
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                if (sigprocmask(SIG_BLOCK, &mask, &mask) < 0)
 
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                        return SIG_ERR;
 
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        } else {
 
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                sa.sa_handler = handler;
 
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                sa.sa_flags = 0;
 
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                sigemptyset(&sa.sa_mask);
 
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                if (sigaction(sig, &sa, &sa_old) < 0)
 
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                        return SIG_ERR;
 
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                if (sigprocmask(SIG_UNBLOCK, &mask, &mask) < 0)
 
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                        return SIG_ERR;
 
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        }
 
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        return sigismember(&mask, sig) ? SIG_HOLD : sa_old.sa_handler;
 
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}