1 /*
2  * Copyright (c) 2000 Silicon Graphics, Inc.  All Rights Reserved.
3  *  AUTHOR		: William Roske
4  *  CO-PILOT		: Dave Fenner
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  * Tests that link(2) succeds.
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 
52 char *TCID = "link02";
53 int TST_TOTAL = 1;
54 
55 #define OLDPATH "oldpath"
56 #define NEWPATH "newpath"
57 
58 static void verify_link(void)
59 {
60 	struct stat fbuf, lbuf;
61 
62 	TEST(link(OLDPATH, NEWPATH));
63 
64 	if (TEST_RETURN == 0) {
65 		SAFE_STAT(cleanup, OLDPATH, &fbuf);
66 		SAFE_STAT(cleanup, NEWPATH, &lbuf);
67 		if (fbuf.st_nlink > 1 && lbuf.st_nlink > 1 &&
68 		    fbuf.st_nlink == lbuf.st_nlink) {
69 			tst_resm(TPASS, "link("OLDPATH","NEWPATH") "
70 			         "returned 0 and link counts match");
71 		} else {
72 			tst_resm(TFAIL, "link("OLDPATH","NEWPATH") returned 0"
73 				 " but stat lin count do not match %d %d",
74 				 (int)fbuf.st_nlink, (int)lbuf.st_nlink);
75 		}
76 		SAFE_UNLINK(cleanup, NEWPATH);
77 	} else {
78 		tst_resm(TFAIL | TTERRNO,
79 		         "link("OLDPATH","NEWPATH") returned %ld",
80 		         TEST_RETURN);
81 	}
82 }
83 
84 int main(int ac, char **av)
85 {
86 	int lc;
87 
88 	tst_parse_opts(ac, av, NULL, NULL);
89 
90 	setup();
91 
92 	for (lc = 0; TEST_LOOPING(lc); lc++) {
93 		tst_count = 0;
94 		verify_link();
95 	}
96 
97 	cleanup();
98 	tst_exit();
99 }
100 
101 static void setup(void)
102 {
103 	tst_sig(NOFORK, DEF_HANDLER, cleanup);
104 
105 	TEST_PAUSE;
106 
107 	tst_tmpdir();
108 
109 	SAFE_TOUCH(cleanup, OLDPATH, 0700, NULL);
110 }
111 
112 static void cleanup(void)
113 {
114 	tst_rmdir();
115 }
116