symlink: new module, for Solaris 9 bug

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

diff --git a/tests/test-symlink.c b/tests/test-symlink.c
new file mode 100644 (file)
index 0000000..9f9dda1
--- /dev/null
+++ b/tests/test-symlink.c
@@ -0,0 +1,97 @@
+/* Tests of symlink.
+   Copyright (C) 2009 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
+   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
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   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, see <http://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2009.  */
+
+#include <config.h>
+
+#include <unistd.h>
+
+#include <fcntl.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+
+#define ASSERT(expr) \
+  do                                                                         \
+    {                                                                        \
+      if (!(expr))                                                           \
+       {                                                                    \
+         fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__);  \
+         fflush (stderr);                                                   \
+         abort ();                                                          \
+       }                                                                    \
+    }                                                                        \
+  while (0)
+
+#define BASE "test-symlink.t"
+
+int
+main ()
+{
+  /* Remove any leftovers from a previous partial run.  */
+  ASSERT (system ("rm -rf " BASE "*") == 0);
+
+  if (symlink ("nowhere", BASE "link1"))
+    {
+      fputs ("skipping test: symlinks not supported on this filesystem\n",
+            stderr);
+      return 77;
+    }
+
+  /* Some systems allow the creation of 0-length symlinks as a synonym
+     for "."; but most reject it.  */
+  errno = 0;
+  if (symlink ("", BASE "link2") == -1)
+    ASSERT (errno == ENOENT || errno == EINVAL);
+  else
+    ASSERT (unlink (BASE "link2") == 0);
+
+  /* Sanity checks of failures.  */
+  errno = 0;
+  ASSERT (symlink ("nowhere", "") == -1);
+  ASSERT (errno == ENOENT);
+  errno = 0;
+  ASSERT (symlink ("nowhere", ".") == -1);
+  ASSERT (errno == EEXIST || errno == EINVAL);
+  errno = 0;
+  ASSERT (symlink ("somewhere", BASE "link1") == -1);
+  ASSERT (errno == EEXIST);
+  errno = 0;
+  ASSERT (symlink ("nowhere", BASE "link2/") == -1);
+  ASSERT (errno == ENOTDIR || errno == ENOENT);
+  ASSERT (mkdir (BASE "dir", 0700) == 0);
+  errno = 0;
+  ASSERT (symlink ("nowhere", BASE "dir") == -1);
+  ASSERT (errno == EEXIST);
+  errno = 0;
+  ASSERT (symlink ("nowhere", BASE "dir/") == -1);
+  ASSERT (errno == EEXIST);
+  ASSERT (close (creat (BASE "file", 0600)) == 0);
+  errno = 0;
+  ASSERT (symlink ("nowhere", BASE "file") == -1);
+  ASSERT (errno == EEXIST);
+  errno = 0;
+  ASSERT (symlink ("nowhere", BASE "file/") == -1);
+  ASSERT (errno == EEXIST || errno == ENOTDIR);
+
+  ASSERT (rmdir (BASE "dir") == 0);
+  ASSERT (unlink (BASE "file") == 0);
+  ASSERT (unlink (BASE "link1") == 0);
+
+  return 0;
+}