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/* Test of getcwd function.
Copyright (C) 2000-2024 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
<https://www.gnu.org/licenses/>. */
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/param.h>
#include <libc-diag.h>
#define TEST_FUNCTION do_test ()
static int
do_test (void)
{
char thepath[4096]; /* Yes, this limits the environment this test
can run it but I honestly don't care about
people which have this problem. */
char *bufs[10];
size_t lens[10];
size_t sbs;
size_t len, i;
if (getcwd (thepath, sizeof thepath) == NULL)
{
if (errno == ERANGE)
/* The path is too long, skip all tests. */
return 0;
puts ("getcwd (thepath, sizeof thepath) failed");
return 1;
}
len = strlen (thepath);
sbs = 1;
while (sbs < len + 1)
sbs <<= 1;
for (i = 0; i < 4; ++i)
{
lens[i] = sbs;
bufs[i] = (char *) malloc (sbs);
}
/* Avoid warnings about the first argument being null when the second
is nonzero. */
DIAG_PUSH_NEEDS_COMMENT;
DIAG_IGNORE_NEEDS_COMMENT (10.1, "-Wnonnull");
bufs[i] = getcwd (NULL, sbs);
DIAG_POP_NEEDS_COMMENT;
lens[i] = sbs;
if (bufs[i] == NULL)
{
puts ("getcwd (NULL, sbs) failed");
return 1;
}
++i;
for (; i < 10; sbs >>= 1, ++i)
{
bufs[i] = (char *) malloc (MAX (1, sbs));
lens[i] = sbs;
}
/* Before we test the result write something in the memory to see
whether the allocation went right. */
for (i = 0; i < 10; ++i)
if (i != 4 && bufs[i] != NULL)
memset (bufs[i], '\xff', lens[i]);
if (strcmp (thepath, bufs[4]) != 0)
{
printf ("\
getcwd (NULL, sbs) = \"%s\", getcwd (thepath, sizeof thepath) = \"%s\"\n",
bufs[4], thepath);
return 1;
}
/* Now overwrite all buffers to see that getcwd allocated the buffer
of right size. */
for (i = 0; i < 10; ++i)
memset (bufs[i], i, lens[i]);
for (i = 0; i < 10; ++i)
free (bufs[i]);
/* Test whether the function signals success despite the buffer
being too small.
Avoid warnings about the first argument being null when the second
is nonzero. */
DIAG_PUSH_NEEDS_COMMENT;
DIAG_IGNORE_NEEDS_COMMENT (10.1, "-Wnonnull");
if (getcwd (NULL, len) != NULL)
{
puts ("getcwd (NULL, len) didn't failed");
return 1;
}
DIAG_POP_NEEDS_COMMENT;
bufs[0] = malloc (len);
bufs[1] = malloc (len);
bufs[2] = malloc (len);
if (bufs[1] != NULL)
{
if (getcwd (bufs[1], len) != NULL)
{
puts ("getcwd (bufs[1], len) didn't failed");
return 1;
}
free (bufs[0]);
free (bufs[1]);
free (bufs[2]);
}
memset (thepath, '\xfe', sizeof (thepath));
if (getcwd (thepath, len) != NULL)
{
puts ("getcwd (thepath, len) didn't failed");
return 1;
}
for (i = len; i < sizeof thepath; ++i)
if (thepath[i] != '\xfe')
{
puts ("thepath[i] != '\xfe'");
return 1;
}
/* Now test handling of correctly sized buffers.
Again. avoid warnings about the first argument being null when
the second is nonzero. */
DIAG_PUSH_NEEDS_COMMENT;
DIAG_IGNORE_NEEDS_COMMENT (10.1, "-Wnonnull");
bufs[0] = getcwd (NULL, len + 1);
if (bufs[0] == NULL)
{
puts ("getcwd (NULL, len + 1) failed");
return 1;
}
DIAG_POP_NEEDS_COMMENT;
free (bufs[0]);
memset (thepath, '\xff', sizeof thepath);
if (getcwd (thepath, len + 1) == NULL)
{
puts ("getcwd (thepath, len + 1) failed");
return 1;
}
for (i = len + 1; i < sizeof thepath; ++i)
if (thepath[i] != '\xff')
{
printf ("thepath[%zd] != '\xff'\n", i);
return 1;
}
puts ("everything OK");
return 0;
}
#include "../test-skeleton.c"
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