Quentin Smith
55 lines
1.1 KiB
C
55 lines
1.1 KiB
C
/* ISC license. */
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/* MT-unsafe */
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#include <errno.h>
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#include <signal.h>
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#include "sysdeps.h"
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#include "selfpipe-internal.h"
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#include "selfpipe.h"
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#ifdef HASSIGNALFD
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#include <sys/signalfd.h>
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int selfpipe_untrap (int sig)
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{
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sigset_t ss = selfpipe_caught ;
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sigset_t blah ;
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register int r = sigismember(&selfpipe_caught, sig) ;
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if (selfpipe_fd < 0) return (errno = EBADF, -1) ;
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if (r < 0) return -1 ;
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if (!r) return (errno = EINVAL, -1) ;
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if ((sigdelset(&ss, sig) < 0)
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|| (signalfd(selfpipe_fd, &ss, SFD_NONBLOCK | SFD_CLOEXEC) < 0))
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return -1 ;
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sigemptyset(&blah) ;
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sigaddset(&blah, sig) ;
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if (sigprocmask(SIG_UNBLOCK, &blah, 0) < 0)
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{
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int e = errno ;
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signalfd(selfpipe_fd, &selfpipe_caught, SFD_NONBLOCK | SFD_CLOEXEC) ;
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errno = e ;
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return -1 ;
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}
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selfpipe_caught = ss ;
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return 0 ;
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}
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#else
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#include "sig.h"
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int selfpipe_untrap (int sig)
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{
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register int r = sigismember(&selfpipe_caught, sig) ;
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if (selfpipe_fd < 0) return (errno = EBADF, -1) ;
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if (r < 0) return -1 ;
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if (!r) return (errno = EINVAL, -1) ;
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if (sig_restore(sig) < 0) return -1 ;
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sigdelset(&selfpipe_caught, sig) ;
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return 0 ;
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}
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#endif
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