1 files changed, 48 insertions, 0 deletions
diff --git a/src/pipe-tools/s6-ftrig-wait.c b/src/pipe-tools/s6-ftrig-wait.c
new file mode 100644
index 0000000..772ce86
--- /dev/null
+++ b/src/pipe-tools/s6-ftrig-wait.c
@@ -0,0 +1,48 @@
+/* ISC license. */
+
+#include <errno.h>
+#include <skalibs/allreadwrite.h>
+#include <skalibs/sgetopt.h>
+#include <skalibs/uint.h>
+#include <skalibs/strerr2.h>
+#include <skalibs/tai.h>
+#include <s6/ftrigr.h>
+
+#define USAGE "s6-ftrig-wait [ -t timeout ] fifodir regexp"
+
+int main (int argc, char const *const *argv)
+{
+  tain_t deadline, tto ;
+  ftrigr_t a = FTRIGR_ZERO ;
+  uint16 id ;
+  char pack[2] = " \n" ;
+  PROG = "s6-ftrig-wait" ;
+  {
+    unsigned int t = 0 ;
+    for (;;)
+    {
+      register int opt = subgetopt(argc, argv, "t:") ;
+      if (opt == -1) break ;
+      switch (opt)
+      {
+        case 't' : if (uint0_scan(subgetopt_here.arg, &t)) break ;
+        default : strerr_dieusage(100, USAGE) ;
+      }
+    }
+    if (t) tain_from_millisecs(&tto, t) ;
+    else tto = tain_infinite_relative ;
+    argc -= subgetopt_here.ind ; argv += subgetopt_here.ind ;
+  }
+  if (argc < 2) strerr_dieusage(100, USAGE) ;
+
+  tain_now_g() ;
+  tain_add_g(&deadline, &tto) ;
+
+  if (!ftrigr_startf_g(&a, &deadline)) strerr_diefu1sys(111, "ftrigr_startf") ;
+  id = ftrigr_subscribe_g(&a, argv[0], argv[1], 0, &deadline) ;
+  if (!id) strerr_diefu4sys(111, "subscribe to ", argv[0], " with regexp ", argv[1]) ;
+  if (ftrigr_wait_or_g(&a, &id, 1, &deadline, &pack[0]) == -1)
+    strerr_diefu2sys((errno == ETIMEDOUT) ? 1 : 111, "match regexp on ", argv[1]) ;
+  if (allwrite(1, pack, 2) < 2) strerr_diefu1sys(111, "write to stdout") ;
+  return 0 ;
+}