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      1 /*
      2  * Copyright (c) International Business Machines  Corp., 2001
      3  *  07/2001 Ported by Wayne Boyer
      4  *
      5  * This program is free software;  you can redistribute it and/or modify
      6  * it under the terms of the GNU General Public License as published by
      7  * the Free Software Foundation; either version 2 of the License, or
      8  * (at your option) any later version.
      9  *
     10  * This program is distributed in the hope that it will be useful,
     11  * but WITHOUT ANY WARRANTY;  without even the implied warranty of
     12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
     13  * the GNU General Public License for more details.
     14  *
     15  * You should have received a copy of the GNU General Public License
     16  * along with this program;  if not, write to the Free Software Foundation,
     17  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
     18  */
     19 
     20 /*
     21  * Test Name: lstat03
     22  *
     23  * Test Description:
     24  *  Verify that, lstat(2) succeeds to get the status of a file pointed to by
     25  *  symlink and fills the stat structure elements.
     26  *
     27  * Expected Result:
     28  *  lstat() should return value 0 on success and the stat structure elements
     29  *  should be filled with the symlink file information.
     30  */
     31 #include <stdio.h>
     32 #include <sys/types.h>
     33 #include <fcntl.h>
     34 #include <sys/stat.h>
     35 #include <errno.h>
     36 #include <string.h>
     37 #include <signal.h>
     38 #include <pwd.h>
     39 
     40 #include "test.h"
     41 #include "safe_macros.h"
     42 
     43 #define FILE_MODE	S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH
     44 #define TESTFILE	"testfile"
     45 #define SFILE		"sfile"
     46 #define FILE_SIZE       1024
     47 #define BUF_SIZE	256
     48 #define PERMS		0644
     49 
     50 char *TCID = "lstat03";
     51 int TST_TOTAL = 1;
     52 static uid_t user_id;
     53 static gid_t group_id;
     54 
     55 static char nobody_uid[] = "nobody";
     56 static struct passwd *ltpuser;
     57 
     58 static void setup(void);
     59 static void cleanup(void);
     60 
     61 int main(int ac, char **av)
     62 {
     63 	struct stat stat_buf;
     64 	int lc;
     65 
     66 	tst_parse_opts(ac, av, NULL, NULL);
     67 
     68 	setup();
     69 
     70 	for (lc = 0; TEST_LOOPING(lc); lc++) {
     71 		tst_count = 0;
     72 
     73 		TEST(lstat(SFILE, &stat_buf));
     74 
     75 		if (TEST_RETURN == -1) {
     76 			tst_resm(TFAIL | TTERRNO, "lstat(%s) failed", SFILE);
     77 			continue;
     78 		}
     79 
     80 		if ((stat_buf.st_uid != user_id) ||
     81 		    (stat_buf.st_gid != group_id) ||
     82 		    ((stat_buf.st_mode & S_IFMT) != S_IFLNK) ||
     83 		    (stat_buf.st_size != strlen(TESTFILE))) {
     84 			tst_resm(TFAIL, "Functionality of lstat(2) on "
     85 				 "'%s' Failed", SFILE);
     86 		} else {
     87 			tst_resm(TPASS, "Functionality of lstat(2) on "
     88 				 "'%s' Succcessful", SFILE);
     89 		}
     90 	}
     91 
     92 	cleanup();
     93 	tst_exit();
     94 }
     95 
     96 static void setup(void)
     97 {
     98 	tst_sig(NOFORK, DEF_HANDLER, cleanup);
     99 
    100 	tst_require_root();
    101 
    102 	ltpuser = SAFE_GETPWNAM(NULL, nobody_uid);
    103 	SAFE_SETUID(NULL, ltpuser->pw_uid);
    104 
    105 	TEST_PAUSE;
    106 
    107 	tst_tmpdir();
    108 
    109 	if (tst_fill_file(TESTFILE, 'a', 1024, 1))
    110 		tst_brkm(TBROK, cleanup, "Failed to create " TESTFILE);
    111 
    112 	SAFE_SYMLINK(cleanup, TESTFILE, SFILE);
    113 
    114 	user_id = getuid();
    115 	group_id = getgid();
    116 }
    117 
    118 static void cleanup(void)
    119 {
    120 	tst_rmdir();
    121 }
    122