Initial commit

1 files changed, 22 insertions, 0 deletions

diff --git a/src/libs6/s6_svc_write.c b/src/libs6/s6_svc_write.c
new file mode 100644
index 0000000..ea9eee5
--- /dev/null
+++ b/src/libs6/s6_svc_write.c
@@ -0,0 +1,22 @@
+/* ISC license. */
+
+#include <errno.h>
+#include <skalibs/allreadwrite.h>
+#include <skalibs/djbunix.h>
+#include <s6/s6-supervise.h>
+
+int s6_svc_write (char const *fifo, char const *data, unsigned int datalen)
+{
+  int fd = open_write(fifo) ;
+  if (fd < 0) return (errno == ENXIO) ? 0 : -1 ;
+  else if (ndelay_off(fd) == -1) return -1 ;
+  else if (fd_write(fd, data, datalen) == -1)
+  {
+    register int e = errno ;
+    fd_close(fd) ;
+    errno = e ;
+    return -1 ;
+  }
+  fd_close(fd) ;
+  return 1 ;
+}