1 files changed, 27 insertions, 0 deletions
diff --git a/src/libs6/s6lock_wait_and.c b/src/libs6/s6lock_wait_and.c
new file mode 100644
index 0000000..460cc07
--- /dev/null
+++ b/src/libs6/s6lock_wait_and.c
@@ -0,0 +1,27 @@
+/* ISC license. */
+
+#include <errno.h>
+#include <skalibs/uint16.h>
+#include <skalibs/tai.h>
+#include <skalibs/iopause.h>
+#include <s6/s6lock.h>
+
+int s6lock_wait_and (s6lock_t *a, uint16 const *idlist, unsigned int n, tain_t const *deadline, tain_t *stamp)
+{
+  iopause_fd x = { -1, IOPAUSE_READ, 0 } ;
+  x.fd = s6lock_fd(a) ;
+  for (; n ; n--, idlist++)
+  {
+    for (;;)
+    {
+      register int r = s6lock_check(a, *idlist) ;
+      if (r < 0) return r ;
+      else if (r) break ;
+      r = iopause_stamp(&x, 1, deadline, stamp) ;
+      if (r < 0) return r ;
+      else if (!r) return (errno = ETIMEDOUT, -1) ;
+      else if (s6lock_update(a) < 0) return -1 ;
+    }
+  }
+  return 0 ;
+}