30 lines
609 B
C
30 lines
609 B
C
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/* protable signal() like */
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#include <signal.h>
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/* Portable signal() from R.Stevens,
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* modified to reset the handler */
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void (*Signal(int signo, void (*func)(int)))(int)
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{
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struct sigaction act, oact;
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act.sa_handler = func;
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sigemptyset(&act.sa_mask);
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act.sa_flags = 0; /* So if set SA_RESETHAND is cleared */
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if (signo == SIGALRM)
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{
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#ifdef SA_INTERRUPT
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act.sa_flags |= SA_INTERRUPT; /* SunOS 4.x */
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#endif
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}
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else
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{
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#ifdef SA_RESTART
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act.sa_flags |= SA_RESTART; /* SVR4, 4.4BSD, Linux */
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#endif
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}
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if (sigaction(signo, &act, &oact) == -1)
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return SIG_ERR;
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return (oact.sa_handler);
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}
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