1 files changed, 30 insertions, 0 deletions
diff --git a/src/libs6/s6lock_wait_or.c b/src/libs6/s6lock_wait_or.c
new file mode 100644
index 0000000..0219574
--- /dev/null
+++ b/src/libs6/s6lock_wait_or.c
@@ -0,0 +1,30 @@
+/* ISC license. */
+
+#include <errno.h>
+#include <skalibs/uint16.h>
+#include <skalibs/tai.h>
+#include <skalibs/iopause.h>
+#include <s6/s6lock.h>
+
+int s6lock_wait_or (s6lock_t *a, uint16 const *idlist, unsigned int n, tain_t const *deadline, tain_t *stamp)
+{
+  iopause_fd x = { -1, IOPAUSE_READ | IOPAUSE_EXCEPT, 0 } ;
+  x.fd = s6lock_fd(a) ;
+  if (x.fd < 0) return -1 ;
+  for (;;)
+  {
+    register unsigned int i = 0 ;
+    register int r ;
+    for (; i < n ; i++)
+    {
+      r = s6lock_check(a, idlist[i]) ;
+      if (r < 0) return r ;
+      else if (r) return i ;
+    }
+    r = iopause_stamp(&x, 1, deadline, stamp) ;
+    if (r < 0) return 0 ;
+    else if (!r) return (errno = ETIMEDOUT, -1) ;
+    else if (s6lock_update(a) < 0) return -1 ;
+  }
+  return (errno = EPROTO, -1) ; /* can't happen */
+}