1 /* 2 * Copyright (c) International Business Machines Corp., 2001 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation; either version 2 of the License, or 7 * (at your option) any later version. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See 12 * the GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program. 16 */ 17 18 /* 19 * DESCRIPTION 20 * Testcase to check the basic functionality of the getcwd(2) 21 * system call on a symbolic link. 22 * 23 * ALGORITHM 24 * 1) create a directory, and create a symbolic link to it at the 25 * same directory level. 26 * 2) get the working directory of a directory, and its pathname. 27 * 3) get the working directory of a symbolic link, and its pathname, 28 * and its readlink info. 29 * 4) compare the working directories and link information. 30 */ 31 32 #define _GNU_SOURCE 1 33 #include <errno.h> 34 #include <stdio.h> 35 #include <string.h> 36 #include <stdlib.h> 37 #include <sys/stat.h> 38 #include <sys/types.h> 39 #include <stdlib.h> 40 #include "tst_test.h" 41 42 static char dir[BUFSIZ], dir_link[BUFSIZ]; 43 44 static void verify_getcwd(void) 45 { 46 char link[BUFSIZ]; 47 char *res1 = NULL; 48 char *res2 = NULL; 49 50 SAFE_CHDIR(dir); 51 52 res1 = getcwd(NULL, 0); 53 if (!res1) { 54 tst_res(TFAIL | TERRNO, "getcwd() failed to " 55 "get working directory of a directory"); 56 goto end; 57 } 58 59 SAFE_CHDIR(".."); 60 SAFE_CHDIR(dir_link); 61 62 res2 = getcwd(NULL, 0); 63 if (!res2) { 64 tst_res(TFAIL | TERRNO, "getcwd() failed to get " 65 "working directory of a symbolic link"); 66 goto end; 67 } 68 69 if (strcmp(res1, res2)) { 70 tst_res(TFAIL, 71 "getcwd() got mismatched working directories (%s, %s)", 72 res1, res2); 73 goto end; 74 } 75 76 SAFE_CHDIR(".."); 77 SAFE_READLINK(dir_link, link, sizeof(link)); 78 79 if (strcmp(link, SAFE_BASENAME(res1))) { 80 tst_res(TFAIL, 81 "link information didn't match the working directory"); 82 goto end; 83 } 84 85 tst_res(TPASS, "getcwd() succeeded on a symbolic link"); 86 87 end: 88 free(res1); 89 free(res2); 90 } 91 92 static void setup(void) 93 { 94 sprintf(dir, "getcwd1.%d", getpid()); 95 sprintf(dir_link, "getcwd2.%d", getpid()); 96 SAFE_MKDIR(dir, 0755); 97 SAFE_SYMLINK(dir, dir_link); 98 } 99 100 static struct tst_test test = { 101 .needs_tmpdir = 1, 102 .setup = setup, 103 .test_all = verify_getcwd 104 }; 105
