1 /* 2 * Copyright (C) Bull S.A. 2001 3 * Copyright (c) International Business Machines Corp., 2001 4 * 06/2002 Ported by Jacky Malcles 5 * Copyright (c) 2014 Cyril Hrubis <chrubis (at) suse.cz> 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See 15 * the GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 20 */ 21 22 /* 23 * Verify that, link() fails with -1 and sets errno to EACCES when Write access 24 * to the directory containing newpath is not allowed for the process's 25 * effective uid. 26 */ 27 28 #include <stdio.h> 29 #include <stdlib.h> 30 #include <unistd.h> 31 #include <fcntl.h> 32 #include <errno.h> 33 #include <string.h> 34 #include <signal.h> 35 #include <sys/types.h> 36 #include <sys/stat.h> 37 #include <pwd.h> 38 39 #include "test.h" 40 #include "safe_macros.h" 41 42 #define NOBODY_USER 99 43 #define MODE_TO S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IXOTH|S_IROTH 44 45 static void setup(void); 46 static void cleanup(void); 47 48 char *TCID = "link06"; 49 int TST_TOTAL = 1; 50 51 #define OLDPATH "oldpath" 52 #define NEWPATH "newpath" 53 54 int main(int ac, char **av) 55 { 56 int lc; 57 58 tst_parse_opts(ac, av, NULL, NULL); 59 60 setup(); 61 62 for (lc = 0; TEST_LOOPING(lc); lc++) { 63 tst_count = 0; 64 65 TEST(link(OLDPATH, NEWPATH)); 66 67 if (TEST_RETURN != -1) { 68 tst_resm(TFAIL, "link() returned %ld," 69 "expected -1, errno=%d", TEST_RETURN, 70 EACCES); 71 } else { 72 if (TEST_ERRNO == EACCES) { 73 tst_resm(TPASS, "link() fails with expected " 74 "error EACCES errno:%d", TEST_ERRNO); 75 } else { 76 tst_resm(TFAIL, "link() fails with " 77 "errno=%d, expected errno=%d", 78 TEST_ERRNO, EACCES); 79 } 80 } 81 } 82 83 cleanup(); 84 tst_exit(); 85 } 86 87 static void setup(void) 88 { 89 struct passwd *nobody_pwd; 90 91 tst_sig(NOFORK, DEF_HANDLER, cleanup); 92 93 tst_require_root(); 94 95 TEST_PAUSE; 96 97 tst_tmpdir(); 98 99 /* Modify mode permissions on test directory */ 100 SAFE_CHMOD(cleanup, ".", MODE_TO); 101 102 SAFE_TOUCH(cleanup, OLDPATH, 0777, NULL); 103 nobody_pwd = SAFE_GETPWNAM(cleanup, "nobody"); 104 SAFE_SETEUID(cleanup, nobody_pwd->pw_uid); 105 } 106 107 static void cleanup(void) 108 { 109 if (seteuid(0)) 110 tst_resm(TWARN | TERRNO, "seteuid(0) failed"); 111 112 tst_rmdir(); 113 } 114
