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/* ISC license. */
/* MT-unsafe */
#include <errno.h>
#include <signal.h>
#include <skalibs/sysdeps.h>
#include <skalibs/selfpipe.h>
#include "selfpipe-internal.h"
#ifdef SKALIBS_HASSIGNALFD
#include <sys/signalfd.h>
int selfpipe_trap (int sig)
{
sigset_t ss = selfpipe_caught ;
sigset_t old ;
if (selfpipe_fd < 0) return (errno = EBADF, 0) ;
if ((sigaddset(&ss, sig) < 0) || (sigprocmask(SIG_BLOCK, &ss, &old) < 0)) return 0 ;
if (signalfd(selfpipe_fd, &ss, SFD_NONBLOCK | SFD_CLOEXEC) < 0)
{
int e = errno ;
sigprocmask(SIG_SETMASK, &old, 0) ;
errno = e ;
return 0 ;
}
selfpipe_caught = ss ;
return 1 ;
}
#else
#include <skalibs/sig.h>
int selfpipe_trap (int sig)
{
if (selfpipe_fd < 0) return (errno = EBADF, 0) ;
if (!sig_catch(sig, &selfpipe_tophalf)) return 0 ;
sigaddset(&selfpipe_caught, sig) ;
sig_unblock(sig) ;
return 1 ;
}
#endif
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