passfd: give nicer error for recvfd at eof

[gnulib.git] / tests / test-passfd.c

diff --git a/tests/test-passfd.c b/tests/test-passfd.c
index d657ad9..3351233 100644 (file)
--- a/tests/test-passfd.c
+++ b/tests/test-passfd.c
@@ -1,5 +1,5 @@
 /* Test of passing file descriptors.
-   Copyright (C) 2011 Free Software Foundation, Inc.
+   Copyright (C) 2011-2013 Free Software Foundation, Inc.
 
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -18,6 +18,7 @@
 
 #include "passfd.h"
 
+#include <errno.h>
 #include <fcntl.h>
 #include <signal.h>
 #include <stdlib.h>
@@ -33,6 +34,7 @@
 int
 main ()
 {
+#if HAVE_SOCKETPAIR
   int pair[2];
   int ret;
   pid_t pid;
@@ -41,11 +43,12 @@ main ()
   int fd;
   struct stat st;
 
-#if HAVE_DECL_ALARM
+# if HAVE_DECL_ALARM
   /* Avoid hanging on failure.  */
+  int alarm_value = 5;
   signal (SIGALRM, SIG_DFL);
-  alarm (5);
-#endif
+  alarm (alarm_value);
+# endif
 
   fdnull = open ("/dev/null", O_RDWR);
   if (fdnull < 0)
@@ -80,6 +83,7 @@ main ()
   /* father */
   else
     {
+      ASSERT (close (pair[1]) == 0);
       fd = recvfd (pair[0], 0);
       if (fd == -1)
         {
@@ -113,6 +117,26 @@ main ()
           perror ("fstat");
           return 80;
         }
+
+      /* Check behavior when sender no longer around */
+      errno = 0;
+      fd = recvfd (pair[0], 0);
+      ASSERT (fd == -1);
+      ASSERT (errno == ENOTCONN);
+
       return 0;
     }
+#else
+  errno = 0;
+  ASSERT(sendfd (0, 0) == -1);
+  ASSERT(errno == ENOSYS);
+
+  errno = 0;
+  ASSERT(recvfd (0, 0) == -1);
+  ASSERT(errno == ENOSYS);
+
+  fputs ("skipping test: socketpair not supported on this system\n",
+         stderr);
+  return 77;
+#endif
 }