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/* Test program for returning the canonical absolute name of a given file.
Copyright (C) 1996-2023 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/>. */
/* This file must be run from within a directory called "stdlib". */
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/param.h>
#include <sys/stat.h>
/* Prototype for our test function. */
extern int do_test (int argc, char *argv[]);
#include <test-skeleton.c>
#ifndef PATH_MAX
# define PATH_MAX 4096
#endif
static char cwd[PATH_MAX];
static size_t cwd_len;
struct {
const char * name;
const char * value;
} symlinks[] = {
{"SYMLINK_LOOP", "SYMLINK_LOOP"},
{"SYMLINK_1", "."},
{"SYMLINK_2", "//////./../../etc"},
{"SYMLINK_3", "SYMLINK_1"},
{"SYMLINK_4", "SYMLINK_2"},
{"SYMLINK_5", "doesNotExist"},
};
struct {
const char * in, * out, * resolved;
int error;
} tests[] = {
/* 0 */
{"/", "/"},
{"/////////////////////////////////", "/"},
{"/.././.././.././..///", "/"},
{"/etc", "/etc"},
{"/etc/../etc", "/etc"},
/* 5 */
{"/doesNotExist/../etc", 0, "/doesNotExist", ENOENT},
{"./././././././././.", "."},
{"/etc/.//doesNotExist", 0, "/etc/doesNotExist", ENOENT},
{"./doesExist", "./doesExist"},
{"./doesExist/", "./doesExist"},
/* 10 */
{"./doesExist/../doesExist", "./doesExist"},
{"foobar", 0, "./foobar", ENOENT},
{".", "."},
{"./foobar", 0, "./foobar", ENOENT},
{"SYMLINK_LOOP", 0, "./SYMLINK_LOOP", ELOOP},
/* 15 */
{"./SYMLINK_LOOP", 0, "./SYMLINK_LOOP", ELOOP},
{"SYMLINK_1", "."},
{"SYMLINK_1/foobar", 0, "./foobar", ENOENT},
{"SYMLINK_2", "/etc"},
{"SYMLINK_3", "."},
/* 20 */
{"SYMLINK_4", "/etc"},
{"../stdlib/SYMLINK_1", "."},
{"../stdlib/SYMLINK_2", "/etc"},
{"../stdlib/SYMLINK_3", "."},
{"../stdlib/SYMLINK_4", "/etc"},
/* 25 */
{"./SYMLINK_5", 0, "./doesNotExist", ENOENT},
{"SYMLINK_5", 0, "./doesNotExist", ENOENT},
{"SYMLINK_5/foobar", 0, "./doesNotExist", ENOENT},
{"doesExist/../../stdlib/doesExist", "./doesExist"},
{"doesExist/.././../stdlib/.", "."},
/* 30 */
{"./doesExist/someFile/", 0, "./doesExist/someFile", ENOTDIR},
{"./doesExist/someFile/..", 0, "./doesExist/someFile", ENOTDIR},
};
static int
check_path (const char * result, const char * expected)
{
int good;
if (!result)
return (expected == NULL);
if (!expected)
return 0;
if (expected[0] == '.' && (expected[1] == '/' || expected[1] == '\0'))
good = (strncmp (result, cwd, cwd_len) == 0
&& strcmp (result + cwd_len, expected + 1) == 0);
else
good = (strcmp (expected, result) == 0);
return good;
}
int
do_test (int argc, char ** argv)
{
char * result;
int i, errors = 0;
char buf[PATH_MAX];
getcwd (cwd, sizeof (buf));
cwd_len = strlen (cwd);
errno = 0;
if (realpath (NULL, buf) != NULL || errno != EINVAL)
{
printf ("%s: expected return value NULL and errno set to EINVAL"
" for realpath(NULL,...)\n", argv[0]);
++errors;
}
#if 0
/* This is now allowed. The test is invalid. */
errno = 0;
if (realpath ("/", NULL) != NULL || errno != EINVAL)
{
printf ("%s: expected return value NULL and errno set to EINVAL"
" for realpath(...,NULL)\n", argv[0]);
++errors;
}
#endif
errno = 0;
if (realpath ("", buf) != NULL || errno != ENOENT)
{
printf ("%s: expected return value NULL and set errno to ENOENT"
" for realpath(\"\",...)\n", argv[0]);
++errors;
}
for (i = 0; i < (int) (sizeof (symlinks) / sizeof (symlinks[0])); ++i)
symlink (symlinks[i].value, symlinks[i].name);
int has_dir = mkdir ("doesExist", 0777) == 0;
int fd = has_dir ? creat ("doesExist/someFile", 0777) : -1;
for (i = 0; i < (int) (sizeof (tests) / sizeof (tests[0])); ++i)
{
buf[0] = '\0';
result = realpath (tests[i].in, buf);
if (!check_path (result, tests[i].out))
{
printf ("%s: flunked test %d (expected `%s', got `%s')\n",
argv[0], i, tests[i].out ? tests[i].out : "NULL",
result ? result : "NULL");
++errors;
continue;
}
/* Verify buf contents if the call succeeded or failed with ENOENT. */
if ((result != NULL || errno == ENOENT)
&& !check_path (buf, tests[i].out ? tests[i].out : tests[i].resolved))
{
printf ("%s: flunked test %d (expected resolved `%s', got `%s')\n",
argv[0], i, tests[i].out ? tests[i].out : tests[i].resolved,
buf);
++errors;
continue;
}
if (!tests[i].out && errno != tests[i].error)
{
printf ("%s: flunked test %d (expected errno %d, got %d)\n",
argv[0], i, tests[i].error, errno);
++errors;
continue;
}
char *result2 = realpath (tests[i].in, NULL);
if ((result2 == NULL && result != NULL)
|| (result2 != NULL && strcmp (result, result2) != 0))
{
printf ("\
%s: realpath(..., NULL) produced different result than realpath(..., buf): '%s' vs '%s'\n",
argv[0], result2, result);
++errors;
}
free (result2);
}
getcwd (buf, sizeof (buf));
if (strcmp (buf, cwd))
{
printf ("%s: current working directory changed from %s to %s\n",
argv[0], cwd, buf);
++errors;
}
if (fd >= 0)
{
close (fd);
unlink ("doesExist/someFile");
}
if (has_dir)
rmdir ("doesExist");
for (i = 0; i < (int) (sizeof (symlinks) / sizeof (symlinks[0])); ++i)
unlink (symlinks[i].name);
if (errors != 0)
{
printf ("%d errors.\n", errors);
return EXIT_FAILURE;
}
puts ("No errors.");
return EXIT_SUCCESS;
}
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