maint: update copyright

[gnulib.git] / tests / test-read-file.c

diff --git a/tests/test-read-file.c b/tests/test-read-file.c
index d163b60..fff96ec 100644 (file)
--- a/tests/test-read-file.c
+++ b/tests/test-read-file.c
@@ -1,11 +1,11 @@
 /*
- * Copyright (C) 2006-2007 Free Software Foundation
+ * Copyright (C) 2006-2007, 2010-2014 Free Software Foundation, Inc.
  * Written by Simon Josefsson
  *
- * This program is free software; you can redistribute it and/or modify
+ * 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
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -13,18 +13,15 @@
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- * 02110-1301, USA.  */
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif
+#include <config.h>
 
 #include "read-file.h"
 
 #include <stdio.h>
 #include <stdlib.h>
+#include <sys/stat.h>
 
 #define FILE1 "/etc/resolv.conf"
 #define FILE2 "/dev/null"
@@ -32,35 +29,81 @@
 int
 main (void)
 {
-  {
-    size_t len;
-    char *out = read_file (FILE1, &len);
+  struct stat statbuf;
+  int err = 0;
 
-    if (!out)
-      perror ("Could not read file");
+  /* We can perform the test only if the file exists and is readable.
+     Test whether it exists, then assume it is world-readable.  */
+  if (stat (FILE1, &statbuf) >= 0)
+    {
+      size_t len;
+      char *out = read_file (FILE1, &len);
 
-    if (out[len] != '\0')
-      perror ("BAD: out[len] not zero");
+      if (!out)
+        {
+          perror ("Could not read file");
+          err = 1;
+        }
+      else
+        {
+          if (out[len] != '\0')
+            {
+              perror ("BAD: out[len] not zero");
+              err = 1;
+            }
 
-    printf ("Read %ld from %s...\n", (unsigned long) len, FILE1);
+          if (S_ISREG (statbuf.st_mode))
+            {
+              /* FILE1 is a regular file or a symlink to a regular file.  */
+              if (len != statbuf.st_size)
+                {
+                  fprintf (stderr, "Read %ld from %s...\n", (unsigned long) len, FILE1);
+                  err = 1;
+                }
+            }
+          else
+            {
+              /* Assume FILE1 is not empty.  */
+              if (len == 0)
+                {
+                  fprintf (stderr, "Read nothing from %s\n", FILE1);
+                  err = 1;
+                }
+            }
+          free (out);
+        }
+    }
 
-    free (out);
-  }
+  /* We can perform the test only if the file exists and is readable.
+     Test whether it exists, then assume it is world-readable.  */
+  if (stat (FILE2, &statbuf) >= 0)
+    {
+      size_t len;
+      char *out = read_file (FILE2, &len);
 
-  {
-    size_t len;
-    char *out = read_file (FILE2, &len);
+      if (!out)
+        {
+          perror ("Could not read file");
+          err = 1;
+        }
+      else
+        {
+          if (out[len] != '\0')
+            {
+              perror ("BAD: out[len] not zero");
+              err = 1;
+            }
 
-    if (!out)
-      perror ("Could not read file");
+          /* /dev/null should always be empty.  Ignore statbuf.st_size, since it
+             is not a regular file.  */
+          if (len != 0)
+            {
+              fprintf (stderr, "Read %ld from %s...\n", (unsigned long) len, FILE2);
+              err = 1;
+            }
+          free (out);
+        }
+    }
 
-    if (out[len] != '\0')
-      perror ("BAD: out[len] not zero");
-
-    printf ("Read %ld from %s...\n", (unsigned long) len, FILE2);
-
-    free (out);
-  }
-
-  return 0;
+  return err;
 }