1 /* Test that values of pathconf and fpathconf are consistent for a file.
2 Copyright (C) 2013-2022 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19 #include <fcntl.h>
20 #include <stdio.h>
21 #include <stdlib.h>
22 #include <string.h>
23 #include <unistd.h>
24 #include <sys/stat.h>
25
26
27 static void prepare (void);
28 #define PREPARE(argc, argv) prepare ()
29
30 static int do_test (void);
31 #define TEST_FUNCTION do_test ()
32
33 #include "../test-skeleton.c"
34
35 static int dir_fd;
36 static char *dirbuf;
37
38 static void
prepare(void)39 prepare (void)
40 {
41 size_t test_dir_len = strlen (test_dir);
42 static const char dir_name[] = "/tst-pathconf.XXXXXX";
43
44 size_t dirbuflen = test_dir_len + sizeof (dir_name);
45 dirbuf = xmalloc (dirbuflen);
46
47 snprintf (dirbuf, dirbuflen, "%s%s", test_dir, dir_name);
48 if (mkdtemp (dirbuf) == NULL)
49 {
50 printf ("Cannot create temporary directory: %s\n", strerror (errno));
51 exit (1);
52 }
53
54 add_temp_file (dirbuf);
55
56 dir_fd = open (dirbuf, O_RDONLY);
57 if (dir_fd == -1)
58 {
59 printf ("Cannot open directory: %s\n", strerror (errno));
60 exit (1);
61 }
62 }
63
64
65 static int
do_test(void)66 do_test (void)
67 {
68 int ret = 0;
69 static const char *fifo_name = "some-fifo";
70
71 size_t filenamelen = strlen (dirbuf) + strlen (fifo_name) + 2;
72 char *filename = xmalloc (filenamelen);
73
74 snprintf (filename, filenamelen, "%s/%s", dirbuf, fifo_name);
75
76 /* Create a fifo in the directory. */
77 int e = mkfifo (filename, 0777);
78 if (e == -1)
79 {
80 printf ("fifo creation failed (%s)\n", strerror (errno));
81 ret = 1;
82 goto out_nofifo;
83 }
84
85 long dir_pathconf = pathconf (dirbuf, _PC_PIPE_BUF);
86
87 if (dir_pathconf < 0)
88 {
89 printf ("pathconf on directory failed: %s\n", strerror (errno));
90 ret = 1;
91 goto out_nofifo;
92 }
93
94 long fifo_pathconf = pathconf (filename, _PC_PIPE_BUF);
95
96 if (fifo_pathconf < 0)
97 {
98 printf ("pathconf on file failed: %s\n", strerror (errno));
99 ret = 1;
100 goto out_nofifo;
101 }
102
103 int fifo = open (filename, O_RDONLY | O_NONBLOCK);
104
105 if (fifo < 0)
106 {
107 printf ("fifo open failed (%s)\n", strerror (errno));
108 ret = 1;
109 goto out_nofifo;
110 }
111
112 long dir_fpathconf = fpathconf (dir_fd, _PC_PIPE_BUF);
113
114 if (dir_fpathconf < 0)
115 {
116 printf ("fpathconf on directory failed: %s\n", strerror (errno));
117 ret = 1;
118 goto out;
119 }
120
121 long fifo_fpathconf = fpathconf (fifo, _PC_PIPE_BUF);
122
123 if (fifo_fpathconf < 0)
124 {
125 printf ("fpathconf on file failed: %s\n", strerror (errno));
126 ret = 1;
127 goto out;
128 }
129
130 if (fifo_pathconf != fifo_fpathconf)
131 {
132 printf ("fifo pathconf (%ld) != fifo fpathconf (%ld)\n", fifo_pathconf,
133 fifo_fpathconf);
134 ret = 1;
135 goto out;
136 }
137
138 if (dir_pathconf != fifo_pathconf)
139 {
140 printf ("directory pathconf (%ld) != fifo pathconf (%ld)\n",
141 dir_pathconf, fifo_pathconf);
142 ret = 1;
143 goto out;
144 }
145
146 if (dir_fpathconf != fifo_fpathconf)
147 {
148 printf ("directory fpathconf (%ld) != fifo fpathconf (%ld)\n",
149 dir_fpathconf, fifo_fpathconf);
150 ret = 1;
151 goto out;
152 }
153
154 out:
155 close (fifo);
156 out_nofifo:
157 close (dir_fd);
158
159 if (unlink (filename) != 0)
160 {
161 printf ("Could not remove fifo (%s)\n", strerror (errno));
162 ret = 1;
163 }
164
165 return ret;
166 }
167