From 2cd529519d3f9d5034ed222536f8c79ef9e6b86d Mon Sep 17 00:00:00 2001
From: "Schanzenbach, Martin" <mschanzenbach@posteo.de>
Date: Sat, 9 May 2020 23:35:32 +0200
Subject: [PATCH] towards bettwe nss handling

---
 src/gns/nss/nss_gns_query.c | 48 +++++++++++++++++++++++++++++++++++--
 1 file changed, 46 insertions(+), 2 deletions(-)

diff --git a/src/gns/nss/nss_gns_query.c b/src/gns/nss/nss_gns_query.c
index 77ad3a358..7f6bef90d 100644
--- a/src/gns/nss/nss_gns_query.c
+++ b/src/gns/nss/nss_gns_query.c
@@ -61,12 +61,15 @@ gns_resolve_name (int af, const char *name, struct userdata *u)
   char line[128];
   int ret;
   int out[2];
+  int tried_arm_start = 0;
   pid_t pid;
 
   if (0 == getuid ())
     return -2; /* GNS via NSS is NEVER for root */
   if (0 != pipe (out))
     return -1;
+
+query_gns:
   pid = fork ();
   if (-1 == pid)
     return -1;
@@ -138,15 +141,56 @@ gns_resolve_name (int af, const char *name, struct userdata *u)
   }
   (void) fclose (p);
   waitpid (pid, &ret, 0);
+
   if (! WIFEXITED (ret))
     return -1;
   if (4 == WEXITSTATUS (ret))
     return -2; /* not for GNS */
-  if (3 == ret)
-    return -3; /* timeout -> not found */
+  if ((3 == ret) &&
+      (1 != tried_arm_start))
+    return -3; /* timeout -> try restart */
+  if ((3 == ret) &&
+      (1 == tried_arm_start))
+    return -2; /* timeout -> service unavailable */
   if ((2 == WEXITSTATUS (ret)) || (1 == WEXITSTATUS (ret)))
     return -2; /* launch failure -> service unavailable */
   return 0;
+
+  pid = fork ();
+  if (-1 == pid)
+    return -1;
+  if (0 == pid)
+  {
+    char *argv[] = { "gnunet-arm",
+                     "-s", /* Raw output for easier parsing */
+                     NULL };
+
+    (void) close (STDOUT_FILENO);
+    if ((0 != close (out[0])) ||
+        (STDOUT_FILENO != dup2 (out[1], STDOUT_FILENO)))
+      _exit (1);
+    (void) execvp ("gnunet-arm", argv);
+    _exit (1);
+  }
+  (void) close (out[1]);
+  p = fdopen (out[0], "r");
+  if (NULL == p)
+  {
+    kwait (pid);
+    return -1;
+  }
+  while (NULL != fgets (line, sizeof(line), p))
+  {
+    /**
+     * Read output
+     */
+  }
+  (void) fclose (p);
+  waitpid (pid, &ret, 0);
+  tried_arm_start = 1;
+  goto query_gns;
+
+
 }
 
 
-- 
2.25.1