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 /*
38 * Tests that link(2) succeds with creating n links.
39 */
40
41 #include <sys/types.h>
42 #include <fcntl.h>
43 #include <sys/stat.h>
44 #include <errno.h>
45 #include <string.h>
46 #include <signal.h>
47 #include "test.h"
48 #include "safe_macros.h"
49
50 static void setup(void);
51 static void help(void);
52 static void cleanup(void);
53
54 char *TCID = "link03";
55 int TST_TOTAL = 2;
56
57 #define BASENAME "lkfile"
58
59 static char fname[255];
60 static int nlinks = 0;
61 static char *links_arg;
62
63 option_t options[] = {
64 {"N:", NULL, &links_arg},
65 {NULL, NULL, NULL}
66 };
67
main(int ac,char ** av)68 int main(int ac, char **av)
69 {
70 int lc;
71 struct stat buf;
72 int i, links;
73 char lname[255];
74
75 tst_parse_opts(ac, av, options, &help);
76
77 if (links_arg) {
78 nlinks = atoi(links_arg);
79
80 if (nlinks == 0) {
81 tst_brkm(TBROK, NULL,
82 "nlinks is not a positive number");
83 }
84
85 if (nlinks > 1000) {
86 tst_resm(TINFO,
87 "nlinks > 1000 - may get errno:%d (EMLINK)",
88 EMLINK);
89 }
90 }
91
92 setup();
93
94 for (lc = 0; TEST_LOOPING(lc); lc++) {
95 tst_count = 0;
96
97 if (nlinks)
98 links = nlinks;
99 else
100 links = (lc % 90) + 10;
101
102 /* Create links - 1 hardlinks so that the st_nlink == links */
103 for (i = 1; i < links; i++) {
104 sprintf(lname, "%s%d", fname, i);
105 TEST(link(fname, lname));
106
107 if (TEST_RETURN == -1) {
108 tst_brkm(TFAIL | TTERRNO, cleanup,
109 "link(%s, %s) Failed", fname, lname);
110 }
111 }
112
113 SAFE_STAT(cleanup, fname, &buf);
114
115 if (buf.st_nlink != (nlink_t)links) {
116 tst_resm(TFAIL, "Wrong number of links for "
117 "'%s' have %i, should be %i",
118 fname, (int)buf.st_nlink, links);
119 goto unlink;
120 }
121
122 for (i = 1; i < links; i++) {
123 sprintf(lname, "%s%d", fname, i);
124 SAFE_STAT(cleanup, lname, &buf);
125 if (buf.st_nlink != (nlink_t)links) {
126 tst_resm(TFAIL,
127 "Wrong number of links for "
128 "'%s' have %i, should be %i",
129 lname, (int)buf.st_nlink, links);
130 goto unlink;
131 }
132 }
133
134 tst_resm(TPASS, "link() passed and linkcounts=%d match", links);
135
136 unlink:
137 for (i = 1; i < links; i++) {
138 sprintf(lname, "%s%d", fname, i);
139 SAFE_UNLINK(cleanup, lname);
140 }
141 }
142
143 cleanup();
144 tst_exit();
145 }
146
help(void)147 static void help(void)
148 {
149 printf(" -N #links : create #links hard links every iteration\n");
150 }
151
setup(void)152 static void setup(void)
153 {
154 tst_sig(NOFORK, DEF_HANDLER, cleanup);
155
156 TEST_PAUSE;
157
158 tst_tmpdir();
159
160 sprintf(fname, "%s_%d", BASENAME, getpid());
161 SAFE_TOUCH(cleanup, fname, 0700, NULL);
162 }
163
cleanup(void)164 static void cleanup(void)
165 {
166 tst_rmdir();
167 }
168