1 files changed, 27 insertions, 0 deletions
diff --git a/src/libstddjb/selfpipe_init.c b/src/libstddjb/selfpipe_init.c
new file mode 100644
index 0000000..bd26d2f
--- /dev/null
+++ b/src/libstddjb/selfpipe_init.c
@@ -0,0 +1,27 @@
+/* ISC license. */
+
+/* MT-unsafe */
+
+#include <errno.h>
+#include <signal.h>
+#include <skalibs/sysdeps.h>
+#include "selfpipe-internal.h"
+#include <skalibs/selfpipe.h>
+
+#ifdef SKALIBS_HASSIGNALFD
+#include <sys/signalfd.h>
+#else
+#include <skalibs/djbunix.h>
+#endif
+
+int selfpipe_init (void)
+{
+  if (selfpipe_fd >= 0) return (errno = EBUSY, -1) ;
+  sigemptyset(&selfpipe_caught) ;
+#ifdef SKALIBS_HASSIGNALFD
+  selfpipe_fd = signalfd(-1, &selfpipe_caught, SFD_NONBLOCK | SFD_CLOEXEC) ;
+#else
+  if (pipenbcoe(selfpipe) < 0) return -1 ;
+#endif
+  return selfpipe_fd ;
+}