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+/* Test of getcwd function.
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+ Copyright (C) 2000-2018 Free Software Foundation, Inc.
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+
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+ The GNU C Library is free software; you can redistribute it and/or
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+ modify it under the terms of the GNU Lesser General Public
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+ License as published by the Free Software Foundation; either
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+ version 2.1 of the License, or (at your option) any later version.
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+
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+ The GNU C Library is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ Lesser General Public License for more details.
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+
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+ You should have received a copy of the GNU Lesser General Public
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+ License along with the GNU C Library; if not, see
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+ <http://www.gnu.org/licenses/>. */
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+
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+#include <errno.h>
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+#include <stdio.h>
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+#include <stdlib.h>
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+#include <string.h>
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+#include <unistd.h>
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+#include <sys/param.h>
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+
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+
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+#define TEST_FUNCTION do_test ()
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+static int
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+do_test (void)
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+{
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+ char thepath[4096]; /* Yes, this limits the environment this test
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+ can run it but I honestly don't care about
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+ people which have this problem. */
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+ char *bufs[10];
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+ size_t lens[10];
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+ size_t sbs;
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+ size_t len, i;
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+
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+ if (getcwd (thepath, sizeof thepath) == NULL)
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+ {
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+ if (errno == ERANGE)
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+ /* The path is too long, skip all tests. */
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+ return 0;
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+
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+ puts ("getcwd (thepath, sizeof thepath) failed");
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+ return 1;
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+ }
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+ len = strlen (thepath);
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+
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+ sbs = 1;
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+ while (sbs < len + 1)
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+ sbs <<= 1;
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+
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+ for (i = 0; i < 4; ++i)
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+ {
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+ lens[i] = sbs;
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+ bufs[i] = (char *) malloc (sbs);
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+ }
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+
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+ bufs[i] = getcwd (NULL, sbs);
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+ lens[i] = sbs;
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+ if (bufs[i] == NULL)
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+ {
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+ puts ("getcwd (NULL, sbs) failed");
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+ return 1;
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+ }
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+ ++i;
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+
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+ for (; i < 10; sbs >>= 1, ++i)
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+ {
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+ bufs[i] = (char *) malloc (MAX (1, sbs));
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+ lens[i] = sbs;
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+ }
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+
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+ /* Before we test the result write something in the memory to see
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+ whether the allocation went right. */
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+ for (i = 0; i < 10; ++i)
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+ if (i != 4 && bufs[i] != NULL)
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+ memset (bufs[i], '\xff', lens[i]);
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+
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+ if (strcmp (thepath, bufs[4]) != 0)
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+ {
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+ printf ("\
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+getcwd (NULL, sbs) = \"%s\", getcwd (thepath, sizeof thepath) = \"%s\"\n",
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+ bufs[4], thepath);
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+ return 1;
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+ }
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+
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+ /* Now overwrite all buffers to see that getcwd allocated the buffer
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+ of right size. */
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+ for (i = 0; i < 10; ++i)
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+ memset (bufs[i], i, lens[i]);
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+
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+ for (i = 0; i < 10; ++i)
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+ free (bufs[i]);
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+
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+ /* Test whether the function signals success despite the buffer
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+ being too small. */
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+ if (getcwd (NULL, len) != NULL)
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+ {
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+ puts ("getcwd (NULL, len) didn't failed");
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+ return 1;
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+ }
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+
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+ bufs[0] = malloc (len);
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+ bufs[1] = malloc (len);
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+ bufs[2] = malloc (len);
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+ if (bufs[1] != NULL)
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+ {
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+ if (getcwd (bufs[1], len) != NULL)
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+ {
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+ puts ("getcwd (bufs[1], len) didn't failed");
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+ return 1;
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+ }
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+ free (bufs[0]);
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+ free (bufs[1]);
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+ free (bufs[2]);
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+ }
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+
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+ memset (thepath, '\xfe', sizeof (thepath));
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+ if (getcwd (thepath, len) != NULL)
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+ {
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+ puts ("getcwd (thepath, len) didn't failed");
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+ return 1;
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+ }
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+
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+ for (i = len; i < sizeof thepath; ++i)
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+ if (thepath[i] != '\xfe')
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+ {
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+ puts ("thepath[i] != '\xfe'");
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+ return 1;
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+ }
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+
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+ /* Now test handling of correctly sized buffers. */
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+ bufs[0] = getcwd (NULL, len + 1);
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+ if (bufs[0] == NULL)
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+ {
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+ puts ("getcwd (NULL, len + 1) failed");
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+ return 1;
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+ }
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+ free (bufs[0]);
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+
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+ memset (thepath, '\xff', sizeof thepath);
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+ if (getcwd (thepath, len + 1) == NULL)
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+ {
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+ puts ("getcwd (thepath, len + 1) failed");
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+ return 1;
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+ }
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+
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+ for (i = len + 1; i < sizeof thepath; ++i)
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+ if (thepath[i] != '\xff')
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+ {
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+ printf ("thepath[%zd] != '\xff'\n", i);
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+ return 1;
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+ }
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+
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+ puts ("everything OK");
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+
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+ return 0;
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+}
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+
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+#include "../test-skeleton.c"
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