1 files changed, 16 insertions, 0 deletions
diff --git a/src/libs6rc/s6rc_read_uint.c b/src/libs6rc/s6rc_read_uint.c
new file mode 100644
index 0000000..6953190
--- /dev/null
+++ b/src/libs6rc/s6rc_read_uint.c
@@ -0,0 +1,16 @@
+/* ISC license. */
+
+#include <errno.h>
+#include <skalibs/uint.h>
+#include <skalibs/bytestr.h>
+#include <skalibs/djbunix.h>
+
+int s6rc_read_uint (char const *file, unsigned int *u)
+{
+  char buf[UINT_FMT + 1] ;
+  register int r = openreadnclose(file, buf, UINT_FMT) ;
+  if (r < 0) return (errno == ENOENT) ? 0 : -1 ;
+  buf[byte_chr(buf, r, '\n')] = 0 ;
+  if (!uint0_scan(buf, u)) return (errno = EINVAL, -1) ;
+  return 1 ;
+}