1 files changed, 31 insertions, 0 deletions
diff --git a/src/libstddjb/selfpipe_internal.c b/src/libstddjb/selfpipe_internal.c
new file mode 100644
index 0000000..e5d5d95
--- /dev/null
+++ b/src/libstddjb/selfpipe_internal.c
@@ -0,0 +1,31 @@
+/* ISC license. */
+
+/* MT-unsafe */
+
+#include <signal.h>
+#include <skalibs/sysdeps.h>
+#include "selfpipe-internal.h"
+
+sigset_t selfpipe_caught ;
+
+#ifdef SKALIBS_HASSIGNALFD
+
+int selfpipe_fd = -1 ;
+
+#else
+
+#include <errno.h>
+#include <skalibs/allreadwrite.h>
+#include <skalibs/djbunix.h>
+
+int selfpipe[2] = { -1, -1 } ;
+
+static void selfpipe_trigger (int s)
+{
+  char c = (char)s ;
+  fd_write(selfpipe[1], &c, 1) ;
+}
+
+struct skasigaction const selfpipe_ssa = { &selfpipe_trigger, SKASA_NOCLDSTOP | SKASA_MASKALL } ;
+
+#endif