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@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
main(int ac,char ** av)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
help(void)141 static void help(void)
142 {
143 printf(" -N #links : create #links hard links every iteration\n");
144 }
145
setup(void)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
cleanup(void)158 static void cleanup(void)
159 {
160 tst_rmdir();
161 }
162