36 lines
687 B
C
36 lines
687 B
C
#include "syscall.h"
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#include <errno.h>
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struct sigvec { int (*handler)(); int mask,flags; };
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int (*(_sigfunc[32]))();
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extern int _sigtramp();
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extern int errno;
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sigvec(sig,vec,ovec)
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register struct sigvec *vec;
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struct sigvec *ovec;
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{
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struct sigvec tmp;
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int (*old)();
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if ((unsigned) sig >= 32) {
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errno = EINVAL;
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return -1;
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}
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old = _sigfunc[sig];
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if (vec) {
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tmp = *vec;
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vec = &tmp;
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if (vec->handler && vec->handler != (int (*)()) 1) {
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_sigfunc[sig] = vec->handler;
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vec->handler = _sigtramp;
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}
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}
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if (syscall(SYS_sigvec,sig,vec,ovec) < 0) {
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_sigfunc[sig] = old;
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return -1;
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}
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if (ovec && ovec->handler == _sigtramp) {
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ovec->handler = old;
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}
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return 0;
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}
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