[thirdparty/glibc.git] / stdlib / test-canon.c

/* Test program for returning the canonical absolute name of a given file.
   Copyright (C) 1996-2018 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by David Mosberger <davidm@azstarnet.com>.

   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/>.  */

/* 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;
	}

      if (!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;
}
Commit	Line	Data
394f4f17	1	/* Test program for returning the canonical absolute name of a given file.
688903eb	2	Copyright (C) 1996-2018 Free Software Foundation, Inc.
c84142e8 UD	3	This file is part of the GNU C Library.
	4	Contributed by David Mosberger <davidm@azstarnet.com>.
	5
	6	The GNU C Library is free software; you can redistribute it and/or
41bdb6e2 AJ	7	modify it under the terms of the GNU Lesser General Public
	8	License as published by the Free Software Foundation; either
	9	version 2.1 of the License, or (at your option) any later version.
c84142e8 UD	10
	11	The GNU C Library is distributed in the hope that it will be useful,
	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
41bdb6e2	14	Lesser General Public License for more details.
c84142e8	15
41bdb6e2	16	You should have received a copy of the GNU Lesser General Public
59ba27a6 PE	17	License along with the GNU C Library; if not, see
59ba27a6 PE	18	<http://www.gnu.org/licenses/>. */
394f4f17 RM	19
	20	/* This file must be run from within a directory called "stdlib". */
	21
	22	#include <errno.h>
	23	#include <fcntl.h>
	24	#include <stdio.h>
	25	#include <stdlib.h>
	26	#include <string.h>
	27	#include <unistd.h>
	28	#include <sys/param.h>
ceaa9889	29	#include <sys/stat.h>
394f4f17	30
e25054c4 AJ	31	/* Prototype for our test function. */
	32	extern int do_test (int argc, char *argv[]);
	33	#include <test-skeleton.c>
	34
a3f4b50b UD	35	#ifndef PATH_MAX
	36	# define PATH_MAX 4096
	37	#endif
2303f5fd	38	static char cwd[PATH_MAX];
394f4f17 RM	39	static size_t cwd_len;
	40
	41	struct {
	42	const char * name;
	43	const char * value;
	44	} symlinks[] = {
	45	{"SYMLINK_LOOP", "SYMLINK_LOOP"},
	46	{"SYMLINK_1", "."},
	47	{"SYMLINK_2", "//////./../../etc"},
	48	{"SYMLINK_3", "SYMLINK_1"},
	49	{"SYMLINK_4", "SYMLINK_2"},
	50	{"SYMLINK_5", "doesNotExist"},
	51	};
	52
	53	struct {
	54	const char * in, * out, * resolved;
ec4b0518	55	int error;
394f4f17 RM	56	} tests[] = {
	57	/* 0 */
	58	{"/", "/"},
	59	{"/////////////////////////////////", "/"},
	60	{"/.././.././.././..///", "/"},
	61	{"/etc", "/etc"},
e25054c4	62	{"/etc/../etc", "/etc"},
394f4f17 RM	63	/* 5 */
	64	{"/doesNotExist/../etc", 0, "/doesNotExist", ENOENT},
	65	{"./././././././././.", "."},
	66	{"/etc/.//doesNotExist", 0, "/etc/doesNotExist", ENOENT},
	67	{"./doesExist", "./doesExist"},
	68	{"./doesExist/", "./doesExist"},
	69	/* 10 */
	70	{"./doesExist/../doesExist", "./doesExist"},
	71	{"foobar", 0, "./foobar", ENOENT},
	72	{".", "."},
	73	{"./foobar", 0, "./foobar", ENOENT},
	74	{"SYMLINK_LOOP", 0, "./SYMLINK_LOOP", ELOOP},
	75	/* 15 */
	76	{"./SYMLINK_LOOP", 0, "./SYMLINK_LOOP", ELOOP},
	77	{"SYMLINK_1", "."},
	78	{"SYMLINK_1/foobar", 0, "./foobar", ENOENT},
	79	{"SYMLINK_2", "/etc"},
	80	{"SYMLINK_3", "."},
	81	/* 20 */
	82	{"SYMLINK_4", "/etc"},
	83	{"../stdlib/SYMLINK_1", "."},
	84	{"../stdlib/SYMLINK_2", "/etc"},
	85	{"../stdlib/SYMLINK_3", "."},
	86	{"../stdlib/SYMLINK_4", "/etc"},
	87	/* 25 */
	88	{"./SYMLINK_5", 0, "./doesNotExist", ENOENT},
	89	{"SYMLINK_5", 0, "./doesNotExist", ENOENT},
	90	{"SYMLINK_5/foobar", 0, "./doesNotExist", ENOENT},
	91	{"doesExist/../../stdlib/doesExist", "./doesExist"},
0f888d8e UD	92	{"doesExist/.././../stdlib/.", "."},
	93	/* 30 */
	94	{"./doesExist/someFile/", 0, "./doesExist/someFile", ENOTDIR},
	95	{"./doesExist/someFile/..", 0, "./doesExist/someFile", ENOTDIR},
394f4f17 RM	96	};
	97
	98
cf3141a5	99	static int
394f4f17 RM	100	check_path (const char * result, const char * expected)
	101	{
	102	int good;
	103
	104	if (!result)
	105	return (expected == NULL);
	106
	107	if (!expected)
	108	return 0;
	109
	110	if (expected[0] == '.' && (expected[1] == '/' \|\| expected[1] == '\0'))
	111	good = (strncmp (result, cwd, cwd_len) == 0
	112	&& strcmp (result + cwd_len, expected + 1) == 0);
	113	else
	114	good = (strcmp (expected, result) == 0);
	115
	116	return good;
	117	}
	118
	119
d68171ed	120	int
e25054c4	121	do_test (int argc, char ** argv)
394f4f17 RM	122	{
394f4f17 RM	123	char * result;
0f888d8e	124	int i, errors = 0;
394f4f17 RM	125	char buf[PATH_MAX];
	126
	127	getcwd (cwd, sizeof(buf));
	128	cwd_len = strlen (cwd);
	129
86187531 UD	130	errno = 0;
	131	if (realpath (NULL, buf) != NULL \|\| errno != EINVAL)
	132	{
	133	printf ("%s: expected return value NULL and errno set to EINVAL"
	134	" for realpath(NULL,...)\n", argv[0]);
	135	++errors;
	136	}
	137
f7501ae6 UD	138	#if 0
f7501ae6 UD	139	/* This is now allowed. The test is invalid. */
86187531 UD	140	errno = 0;
	141	if (realpath ("/", NULL) != NULL \|\| errno != EINVAL)
	142	{
	143	printf ("%s: expected return value NULL and errno set to EINVAL"
	144	" for realpath(...,NULL)\n", argv[0]);
	145	++errors;
	146	}
f7501ae6	147	#endif
86187531 UD	148
	149	errno = 0;
	150	if (realpath ("", buf) != NULL \|\| errno != ENOENT)
	151	{
cc3fa755	152	printf ("%s: expected return value NULL and set errno to ENOENT"
86187531 UD	153	" for realpath(\"\",...)\n", argv[0]);
	154	++errors;
	155	}
	156
d68171ed	157	for (i = 0; i < (int) (sizeof (symlinks) / sizeof (symlinks[0])); ++i)
394f4f17 RM	158	symlink (symlinks[i].value, symlinks[i].name);
394f4f17 RM	159
0f888d8e UD	160	int has_dir = mkdir ("doesExist", 0777) == 0;
	161
	162	int fd = has_dir ? creat ("doesExist/someFile", 0777) : -1;
394f4f17	163
d68171ed	164	for (i = 0; i < (int) (sizeof (tests) / sizeof (tests[0])); ++i)
394f4f17 RM	165	{
	166	buf[0] = '\0';
	167	result = realpath (tests[i].in, buf);
	168
	169	if (!check_path (result, tests[i].out))
	170	{
	171	printf ("%s: flunked test %d (expected `%s', got `%s')\n",
	172	argv[0], i, tests[i].out ? tests[i].out : "NULL",
	173	result ? result : "NULL");
	174	++errors;
	175	continue;
	176	}
	177
	178	if (!check_path (buf, tests[i].out ? tests[i].out : tests[i].resolved))
	179	{
	180	printf ("%s: flunked test %d (expected resolved `%s', got `%s')\n",
	181	argv[0], i, tests[i].out ? tests[i].out : tests[i].resolved,
	182	buf);
	183	++errors;
	184	continue;
	185	}
	186
ec4b0518	187	if (!tests[i].out && errno != tests[i].error)
394f4f17 RM	188	{
394f4f17 RM	189	printf ("%s: flunked test %d (expected errno %d, got %d)\n",
d68171ed	190	argv[0], i, tests[i].error, errno);
394f4f17 RM	191	++errors;
	192	continue;
	193	}
71b1675e UD	194
	195	char *result2 = realpath (tests[i].in, NULL);
	196	if ((result2 == NULL && result != NULL)
	197	\|\| (result2 != NULL && strcmp (result, result2) != 0))
	198	{
	199	printf ("\
	200	%s: realpath(..., NULL) produced different result than realpath(..., buf): '%s' vs '%s'\n",
	201	argv[0], result2, result);
	202	++errors;
	203	}
	204	free (result2);
394f4f17 RM	205	}
	206
	207	getcwd (buf, sizeof(buf));
	208	if (strcmp (buf, cwd))
	209	{
	210	printf ("%s: current working directory changed from %s to %s\n",
	211	argv[0], cwd, buf);
	212	++errors;
	213	}
	214
	215	if (fd >= 0)
a1260d92 UD	216	{
	217	close (fd);
	218	unlink ("doesExist/someFile");
	219	}
0f888d8e UD	220
	221	if (has_dir)
	222	rmdir ("doesExist");
394f4f17	223
d68171ed	224	for (i = 0; i < (int) (sizeof (symlinks) / sizeof (symlinks[0])); ++i)
394f4f17 RM	225	unlink (symlinks[i].name);
394f4f17 RM	226
d68171ed	227	if (errors != 0)
394f4f17 RM	228	{
394f4f17 RM	229	printf ("%d errors.\n", errors);
e25054c4	230	return EXIT_FAILURE;
394f4f17	231	}
d68171ed UD	232
	233	puts ("No errors.");
	234	return EXIT_SUCCESS;
394f4f17	235	}