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glibc/io/tst-getcwd.c
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/* Test of getcwd function. | |
Copyright (C) 2000-2016 Free Software Foundation, Inc. | |
This file is part of the GNU C Library. | |
Contributed by Ulrich Drepper <drepper@cygnus.com>, 2000. | |
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 <errno.h> | |
#include <stdio.h> | |
#include <stdlib.h> | |
#include <string.h> | |
#include <unistd.h> | |
#include <sys/param.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); | |
} | |
bufs[i] = getcwd (NULL, sbs); | |
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. */ | |
if (getcwd (NULL, len) != NULL) | |
{ | |
puts ("getcwd (NULL, len) didn't failed"); | |
return 1; | |
} | |
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. */ | |
bufs[0] = getcwd (NULL, len + 1); | |
if (bufs[0] == NULL) | |
{ | |
puts ("getcwd (NULL, len + 1) failed"); | |
return 1; | |
} | |
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" |