1 /*
2 * Copyright (c) 2015 Dmitry V. Levin <ldv@altlinux.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #ifdef HAVE_CONFIG_H
29 # include "config.h"
30 #endif
31
32 #include <sys/syscall.h>
33
34 #ifdef __NR_getdents
35
36 #include <assert.h>
37 #include <dirent.h>
38 #include <fcntl.h>
39 #include <stddef.h>
40 #include <stdio.h>
41 #include <sys/stat.h>
42 #include <unistd.h>
43
44 #include "kernel_types.h"
45
46 static const char fname[] =
47 "A\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\n"
48 "A\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\n"
49 "A\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\n"
50 "A\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\n"
51 "A\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\n"
52 "A\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\n"
53 "A\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\n"
54 "A\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nZ";
55 static const char qname[] =
56 "A\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\n"
57 "A\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\n"
58 "A\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\n"
59 "A\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\n"
60 "A\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\n"
61 "A\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\n"
62 "A\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\n"
63 "A\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nZ";
64
65 static char buf[8192];
66
67 static const char *
str_d_type(const unsigned char d_type)68 str_d_type(const unsigned char d_type)
69 {
70 switch (d_type) {
71 case DT_DIR:
72 return "DT_DIR";
73 case DT_REG:
74 return "DT_REG";
75 default:
76 return "DT_UNKNOWN";
77 }
78 }
79 static void
print_dirent(const kernel_dirent * d)80 print_dirent(const kernel_dirent *d)
81 {
82 const unsigned int d_name_offset = offsetof(kernel_dirent, d_name);
83 int d_name_len = d->d_reclen - d_name_offset - 1;
84 assert(d_name_len > 0);
85
86 printf("{d_ino=%llu, d_off=%llu, d_reclen=%u, d_name=",
87 (unsigned long long) d->d_ino,
88 (unsigned long long) d->d_off, d->d_reclen);
89
90 if (d->d_name[0] == '.')
91 printf("\"%.*s\"", d_name_len, d->d_name);
92 else
93 printf("\"%s\"", qname);
94
95 printf(", d_type=%s}",
96 str_d_type(*((const char *) d + d->d_reclen - 1)));
97 }
98
99 int
main(int ac,const char ** av)100 main(int ac, const char **av)
101 {
102 char *dname;
103 int rc;
104
105 assert(ac == 1);
106 assert(asprintf(&dname, "%s.test.tmp.dir", av[0]) > 0);
107 assert(!mkdir(dname, 0700));
108 assert(!chdir(dname));
109 (void) close(0);
110 assert(!creat(fname, 0600));
111 assert(!close(0));
112 assert(!open(".", O_RDONLY | O_DIRECTORY));
113 while ((rc = syscall(__NR_getdents, 0, buf, sizeof(buf)))) {
114 kernel_dirent *d;
115 int i;
116
117 if (rc < 0)
118 return 77;
119 printf("getdents(0, [");
120 for (i = 0; i < rc; i += d->d_reclen) {
121 d = (kernel_dirent *) &buf[i];
122 if (i)
123 printf(", ");
124 print_dirent(d);
125 }
126 printf("], %zu) = %d\n", sizeof(buf), rc);
127 }
128 printf("getdents(0, [], %zu) = 0\n", sizeof(buf));
129 puts("+++ exited with 0 +++");
130 assert(!unlink(fname));
131 assert(!chdir(".."));
132 assert(!rmdir(dname));
133
134 return 0;
135 }
136
137 #else
138
139 int
main(void)140 main(void)
141 {
142 return 77;
143 }
144
145 #endif
146