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authorRoland McGrath <roland@hack.frob.com>2015-05-13 12:33:41 -0700
committerRoland McGrath <roland@hack.frob.com>2015-05-13 12:33:41 -0700
commitb88a18e10c9b18a74e2c2b26817189a5841cff12 (patch)
treeb271bad30b76dc3cbade17c541120048a82a0ac9 /dirent/tst-scandir.c
parentd9efd775ba51916b58b899d8b1c8501105a830de (diff)
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Add a test case for scandir.
Diffstat (limited to 'dirent/tst-scandir.c')
-rw-r--r--dirent/tst-scandir.c298
1 files changed, 298 insertions, 0 deletions
diff --git a/dirent/tst-scandir.c b/dirent/tst-scandir.c
new file mode 100644
index 0000000..a7ad9b6
--- /dev/null
+++ b/dirent/tst-scandir.c
@@ -0,0 +1,298 @@
+/* Basic test for scandir function.
+ Copyright (C) 2015 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <dirent.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#ifndef D
+# define D(x) x
+#endif
+
+static void prepare (void);
+static int do_test (void);
+#define PREPARE(argc, argv) prepare ()
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"
+
+static const char *scandir_test_dir;
+
+static void
+prepare (void)
+{
+ size_t test_dir_len = strlen (test_dir);
+ static const char dir_name[] = "/tst-scandir.XXXXXX";
+
+ size_t dirbuflen = test_dir_len + sizeof (dir_name);
+ char *dirbuf = malloc (dirbuflen);
+ if (dirbuf == NULL)
+ {
+ puts ("out of memory");
+ exit (1);
+ }
+
+ snprintf (dirbuf, dirbuflen, "%s%s", test_dir, dir_name);
+ if (mkdtemp (dirbuf) == NULL)
+ {
+ puts ("cannot create temporary directory");
+ exit (1);
+ }
+
+ add_temp_file (dirbuf);
+ scandir_test_dir = dirbuf;
+}
+
+/* The directory should be empty save the . and .. files. */
+static void
+verify_empty (const char *dirname)
+{
+ DIR *dir = opendir (dirname);
+ if (dir == NULL)
+ {
+ printf ("opendir (%s): %s\n", dirname, strerror (errno));
+ exit (1);
+ }
+
+ struct dirent64 *d;
+ while ((d = readdir64 (dir)) != NULL)
+ if (strcmp (d->d_name, ".") != 0 && strcmp (d->d_name, "..") != 0)
+ {
+ printf ("temp directory contains file \"%s\"\n", d->d_name);
+ exit (1);
+ }
+
+ closedir (dir);
+}
+
+static void
+make_file (const char *dirname, const char *filename)
+{
+ char *name = NULL;
+ if (asprintf (&name, "%s/%s", dirname, filename) < 0)
+ {
+ puts ("out of memory");
+ exit (1);
+ }
+
+ int fd = open (name, O_WRONLY | O_CREAT | O_EXCL, 0600);
+ if (fd < 0)
+ {
+ printf ("cannot create \"%s\": %s\n", name, strerror (errno));
+ exit (1);
+ }
+ close (fd);
+
+ free (name);
+}
+
+static void
+remove_file (const char *dirname, const char *filename)
+{
+ char *name = NULL;
+ if (asprintf (&name, "%s/%s", dirname, filename) < 0)
+ {
+ puts ("out of memory");
+ exit (1);
+ }
+
+ remove (name);
+
+ free (name);
+}
+
+static void
+freelist (struct D(dirent) **list, size_t n)
+{
+ for (size_t i = 0; i < n; ++i)
+ free (list[i]);
+ free (list);
+}
+
+static int
+select_a (const struct D(dirent) *d)
+{
+ return d->d_name[0] == 'a';
+}
+
+static int
+do_test (void)
+{
+ verify_empty (scandir_test_dir);
+
+ make_file (scandir_test_dir, "c");
+ make_file (scandir_test_dir, "aa");
+ make_file (scandir_test_dir, "b");
+ make_file (scandir_test_dir, "a");
+
+
+ /* First a basic test with no select or compare functions. */
+
+ struct D(dirent) **list;
+ int n = D(scandir) (scandir_test_dir, &list, NULL, NULL);
+ if (n < 0)
+ {
+ printf ("scandir failed on %s: %s\n",
+ scandir_test_dir, strerror (errno));
+ return 1;
+ }
+ if (n != 6)
+ {
+ printf ("scandir returned %d entries instead of 6\n", n);
+ return 1;
+ }
+
+ struct
+ {
+ const char *name;
+ bool found;
+ } expected[] =
+ {
+ { ".", },
+ { "..", },
+ { "a", },
+ { "aa", },
+ { "b", },
+ { "c", },
+ };
+
+ /* Verify the results, ignoring the order. */
+ for (int i = 0; i < n; ++i)
+ {
+ for (size_t j = 0; j < sizeof expected / sizeof expected[0]; ++j)
+ if (!strcmp (list[i]->d_name, expected[j].name))
+ {
+ expected[j].found = true;
+ goto found;
+ }
+
+ printf ("scandir yields unexpected entry [%d] \"%s\"\n",
+ i, list[i]->d_name);
+ return 1;
+
+ found:;
+ }
+
+ for (size_t j = 0; j < sizeof expected / sizeof expected[0]; ++j)
+ if (!expected[j].found)
+ {
+ printf ("failed to produce \"%s\"\n", expected[j].name);
+ return 1;
+ }
+
+ freelist (list, n);
+
+
+ /* Now a test with a comparison function. */
+
+ n = D(scandir) (scandir_test_dir, &list, NULL, &D(alphasort));
+ if (n < 0)
+ {
+ printf ("scandir failed on %s: %s\n",
+ scandir_test_dir, strerror (errno));
+ return 1;
+ }
+ if (n != 6)
+ {
+ printf ("scandir returned %d entries instead of 6\n", n);
+ return 1;
+ }
+
+ assert (sizeof expected / sizeof expected[0] == 6);
+ for (int i = 0; i < n; ++i)
+ if (strcmp (list[i]->d_name, expected[i].name))
+ {
+ printf ("scandir yields [%d] of \"%s\", expected \"%s\"\n",
+ i, list[i]->d_name, expected[i].name);
+ return 1;
+ }
+
+ freelist (list, n);
+
+
+ /* Now a test with a select function but no comparison function. */
+
+ n = D(scandir) (scandir_test_dir, &list, &select_a, NULL);
+ if (n < 0)
+ {
+ printf ("scandir failed on %s: %s\n",
+ scandir_test_dir, strerror (errno));
+ return 1;
+ }
+ if (n != 2)
+ {
+ printf ("scandir returned %d entries instead of 2\n", n);
+ return 1;
+ }
+
+ if (strcmp (list[0]->d_name, "a") && strcmp (list[0]->d_name, "aa"))
+ {
+ printf ("scandir yields [0] \"%s\", expected \"a\" or \"aa\"\n",
+ list[0]->d_name);
+ return 1;
+ }
+ if (strcmp (list[1]->d_name, "a") && strcmp (list[1]->d_name, "aa"))
+ {
+ printf ("scandir yields [1] \"%s\", expected \"a\" or \"aa\"\n",
+ list[1]->d_name);
+ return 1;
+ }
+ if (!strcmp (list[0]->d_name, list[1]->d_name))
+ {
+ printf ("scandir yields \"%s\" twice!\n", list[0]->d_name);
+ return 1;
+ }
+
+ freelist (list, n);
+
+
+ /* Now a test with both functions. */
+
+ n = D(scandir) (scandir_test_dir, &list, &select_a, &D(alphasort));
+ if (n < 0)
+ {
+ printf ("scandir failed on %s: %s\n",
+ scandir_test_dir, strerror (errno));
+ return 1;
+ }
+ if (n != 2)
+ {
+ printf ("scandir returned %d entries instead of 2\n", n);
+ return 1;
+ }
+
+ if (strcmp (list[0]->d_name, "a") || strcmp (list[1]->d_name, "aa"))
+ {
+ printf ("scandir yields {\"%s\", \"%s\"}, expected {\"a\", \"aa\"}\n",
+ list[0]->d_name, list[1]->d_name);
+ return 1;
+ }
+
+ freelist (list, n);
+
+
+ /* Clean up the test directory. */
+ remove_file (scandir_test_dir, "c");
+ remove_file (scandir_test_dir, "aa");
+ remove_file (scandir_test_dir, "b");
+ remove_file (scandir_test_dir, "a");
+ rmdir (scandir_test_dir);
+
+ return 0;
+}