1 /* 2 * Copyright (c) 2000 Silicon Graphics, Inc. All Rights Reserved. 3 * AUTHOR : Richard Logan 4 * CO-PILOT : William Roske 5 * Copyright (c) 2014 Cyril Hrubis <chrubis (at) suse.cz> 6 * 7 * This program is free software; you can redistribute it and/or modify it 8 * under the terms of version 2 of the GNU General Public License as 9 * published by the Free Software Foundation. 10 * 11 * This program is distributed in the hope that it would be useful, but 12 * WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 14 * 15 * Further, this software is distributed without any warranty that it is 16 * free of the rightful claim of any third person regarding infringement 17 * or the like. Any license provided herein, whether implied or 18 * otherwise, applies only to this software file. Patent licenses, if 19 * any, provided herein do not apply to combinations of this program with 20 * other software, or any other product whatsoever. 21 * 22 * You should have received a copy of the GNU General Public License along 23 * with this program; if not, write the Free Software Foundation, Inc., 24 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 25 * 26 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, 27 * Mountain View, CA 94043, or: 28 * 29 * http://www.sgi.com 30 * 31 * For further information regarding this notice, see: 32 * 33 * http://oss.sgi.com/projects/GenInfo/NoticeExplan/ 34 */ 35 36 /* 37 * Test if link(2) fails with EMLINK. 38 */ 39 40 #include <sys/types.h> 41 #include <fcntl.h> 42 #include <sys/stat.h> 43 #include <errno.h> 44 #include <string.h> 45 #include <signal.h> 46 #include "test.h" 47 #include "safe_macros.h" 48 49 static void setup(void); 50 static void cleanup(void); 51 static void help(void); 52 53 char *TCID = "link05"; 54 int TST_TOTAL = 1; 55 56 #define BASENAME "lkfile" 57 58 static char fname[255]; 59 60 static char *links_arg; 61 62 option_t options[] = { 63 {"N:", NULL, &links_arg}, 64 {NULL, NULL, NULL} 65 }; 66 67 static int nlinks = 1000; 68 69 int main(int ac, char **av) 70 { 71 int lc; 72 struct stat fbuf, lbuf; 73 int cnt; 74 char lname[255]; 75 76 tst_parse_opts(ac, av, options, &help); 77 78 if (links_arg) { 79 nlinks = atoi(links_arg); 80 81 if (nlinks == 0) { 82 tst_brkm(TBROK, NULL, 83 "nlinks is not a positive number"); 84 } 85 } 86 87 setup(); 88 89 for (lc = 0; TEST_LOOPING(lc); lc++) { 90 91 tst_count = 0; 92 93 for (cnt = 1; cnt < nlinks; cnt++) { 94 sprintf(lname, "%s%d", fname, cnt); 95 TEST(link(fname, lname)); 96 97 if (TEST_RETURN == -1) { 98 tst_resm(TFAIL, 99 "link(%s, %s) Failed, errno=%d : %s", 100 fname, lname, TEST_ERRNO, 101 strerror(TEST_ERRNO)); 102 } 103 } 104 105 SAFE_STAT(cleanup, fname, &fbuf); 106 107 for (cnt = 1; cnt < nlinks; cnt++) { 108 sprintf(lname, "%s%d", fname, cnt); 109 110 SAFE_STAT(cleanup, lname, &lbuf); 111 if (fbuf.st_nlink <= 1 || lbuf.st_nlink <= 1 || 112 (fbuf.st_nlink != lbuf.st_nlink)) { 113 114 tst_resm(TFAIL, 115 "link(%s, %s[1-%d]) ret %ld for %d " 116 "files, stat values do not match %d %d", 117 fname, fname, nlinks, 118 TEST_RETURN, nlinks, 119 (int)fbuf.st_nlink, (int)lbuf.st_nlink); 120 break; 121 } 122 } 123 if (cnt >= nlinks) { 124 tst_resm(TPASS, 125 "link(%s, %s[1-%d]) ret %ld for %d files," 126 "stat linkcounts match %d", 127 fname, fname, nlinks, TEST_RETURN, 128 nlinks, (int)fbuf.st_nlink); 129 } 130 131 for (cnt = 1; cnt < nlinks; cnt++) { 132 sprintf(lname, "%s%d", fname, cnt); 133 SAFE_UNLINK(cleanup, lname); 134 } 135 } 136 137 cleanup(); 138 tst_exit(); 139 } 140 141 static void help(void) 142 { 143 printf(" -N #links : create #links hard links every iteration\n"); 144 } 145 146 static void setup(void) 147 { 148 tst_sig(NOFORK, DEF_HANDLER, cleanup); 149 150 TEST_PAUSE; 151 152 tst_tmpdir(); 153 154 sprintf(fname, "%s_%d", BASENAME, getpid()); 155 SAFE_TOUCH(cleanup, fname, 0700, NULL); 156 } 157 158 static void cleanup(void) 159 { 160 tst_rmdir(); 161 } 162
