From 49cb17940e403431566dc7b5a312624f14eb25d0 Mon Sep 17 00:00:00 2001
From: Laurent Bercot <ska-skaware@skarnet.org>
Date: Fri, 23 Jan 2015 23:47:14 +0000
Subject:  Added fdholder, beta. Documentation will come next.

---
 src/fdholder/s6-fdholder-retrievec.c | 52 ++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 src/fdholder/s6-fdholder-retrievec.c

(limited to 'src/fdholder/s6-fdholder-retrievec.c')

diff --git a/src/fdholder/s6-fdholder-retrievec.c b/src/fdholder/s6-fdholder-retrievec.c
new file mode 100644
index 0000000..2aea31e
--- /dev/null
+++ b/src/fdholder/s6-fdholder-retrievec.c
@@ -0,0 +1,52 @@
+/* ISC license. */
+
+#include <skalibs/uint.h>
+#include <skalibs/strerr2.h>
+#include <skalibs/sgetopt.h>
+#include <skalibs/tai.h>
+#include <skalibs/djbunix.h>
+#include <s6/s6-fdholder.h>
+
+#define USAGE "s6-fdholder-retrievec [ -D ] [ -t timeout ] id prog..."
+#define dieusage() strerr_dieusage(100, USAGE)
+
+int main (int argc, char const *const *argv, char const *const *envp)
+{
+  s6_fdholder_t a = S6_FDHOLDER_ZERO ;
+  tain_t deadline ;
+  int fd ;
+  int dodelete = 0 ;
+  PROG = "s6-fdholder-retrievec" ;
+  {
+    unsigned int t = 0 ;
+    subgetopt_t l = SUBGETOPT_ZERO ;
+    for (;;)
+    {
+      register int opt = subgetopt_r(argc, argv, "Dt:", &l) ;
+      if (opt == -1) break ;
+      switch (opt)
+      {
+        case 'D' : dodelete = 1 ; break ;
+        case 't' : if (!uint0_scan(l.arg, &t)) dieusage() ; break ;
+        default : dieusage() ;
+      }
+    }
+    argc -= l.ind ; argv += l.ind ;
+    if (t) tain_from_millisecs(&deadline, t) ;
+    else deadline = tain_infinite_relative ;
+  }
+  if (!argc) dieusage() ;
+
+  s6_fdholder_init(&a, 6) ;
+  tain_now_g() ;
+  tain_add_g(&deadline, &deadline) ;
+  fd = s6_fdholder_retrieve_maybe_delete_g(&a, argv[0], dodelete, &deadline) ;
+  if (fd < 0) strerr_diefu2sys(111, "retrieve fd for id ", argv[0]) ;
+  else if (!fd)
+  {
+    if (uncoe(0) < 0) strerr_diefu1sys(111, "uncoe stdin") ;
+  }
+  else if (fd_move(0, fd) < 0) strerr_diefu1sys(111, "move fd") ;
+  pathexec_run(argv[1], argv+1, envp) ;
+  strerr_dieexec(111, argv[1]) ;
+}
-- 
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