Quentin Smith
43 lines
1.1 KiB
C
43 lines
1.1 KiB
C
/* ISC license. */
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#include <signal.h>
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#include "sysdeps.h"
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#include "sig.h"
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#ifdef HASSIGACTION
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int skasigaction (int sig, struct skasigaction const *new, struct skasigaction *old)
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{
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struct sigaction sanew, saold ;
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if (((new->flags & SKASA_MASKALL) ? sigfillset(&sanew.sa_mask) : sigemptyset(&sanew.sa_mask)) == -1) return -1 ;
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sanew.sa_handler = new->handler ;
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sanew.sa_flags = (new->flags & SKASA_NOCLDSTOP) ? SA_NOCLDSTOP : 0 ;
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if (sigaction(sig, &sanew, &saold) == -1) return -1 ;
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if (old)
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{
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register int r = sigismember(&saold.sa_mask, (sig == SIGTERM) ? SIGPIPE : SIGTERM) ;
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if (r == -1) return -1 ;
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old->flags = 0 ;
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if (r) old->flags |= SKASA_MASKALL ;
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if (saold.sa_flags & SA_NOCLDSTOP) old->flags |= SKASA_NOCLDSTOP ;
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old->handler = saold.sa_handler ;
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}
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return 0 ;
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}
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#else
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int skasigaction (int sig, struct skasigaction const *new, struct skasigaction *old)
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{
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skasighandler_t_ref haold = signal(sig, new->handler) ;
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if (haold == SIG_ERR) return -1 ;
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if (old)
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{
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old->handler = haold ;
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old->flags = 0 ;
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}
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return 0 ;
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}
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#endif
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