1 #include <dirent.h>
2 #include <fcntl.h>
3 #include <stdbool.h>
4 #include <stdio.h>
5 #include <stdlib.h>
6 #include <string.h>
7 #include <unistd.h>
8 #include <sys/stat.h>
9
10
11 static void prepare (void);
12 #define PREPARE(argc, argv) prepare ()
13
14 static int do_test (void);
15 #define TEST_FUNCTION do_test ()
16
17 #include "../test-skeleton.c"
18
19 static int dir_fd;
20
21 static void
prepare(void)22 prepare (void)
23 {
24 size_t test_dir_len = strlen (test_dir);
25 static const char dir_name[] = "/tst-mknodat.XXXXXX";
26
27 size_t dirbuflen = test_dir_len + sizeof (dir_name);
28 char *dirbuf = malloc (dirbuflen);
29 if (dirbuf == NULL)
30 {
31 puts ("out of memory");
32 exit (1);
33 }
34
35 snprintf (dirbuf, dirbuflen, "%s%s", test_dir, dir_name);
36 if (mkdtemp (dirbuf) == NULL)
37 {
38 puts ("cannot create temporary directory");
39 exit (1);
40 }
41
42 add_temp_file (dirbuf);
43
44 dir_fd = open (dirbuf, O_RDONLY | O_DIRECTORY);
45 if (dir_fd == -1)
46 {
47 puts ("cannot open directory");
48 exit (1);
49 }
50 }
51
52
53 static int
do_test(void)54 do_test (void)
55 {
56 /* fdopendir takes over the descriptor, make a copy. */
57 int dupfd = dup (dir_fd);
58 if (dupfd == -1)
59 {
60 puts ("dup failed");
61 return 1;
62 }
63 if (lseek (dupfd, 0, SEEK_SET) != 0)
64 {
65 puts ("1st lseek failed");
66 return 1;
67 }
68
69 /* The directory should be empty safe the . and .. files. */
70 DIR *dir = fdopendir (dupfd);
71 if (dir == NULL)
72 {
73 puts ("fdopendir failed");
74 return 1;
75 }
76 struct dirent64 *d;
77 while ((d = readdir64 (dir)) != NULL)
78 if (strcmp (d->d_name, ".") != 0 && strcmp (d->d_name, "..") != 0)
79 {
80 printf ("temp directory contains file \"%s\"\n", d->d_name);
81 return 1;
82 }
83 closedir (dir);
84
85 /* Create a new fifo. */
86 int e = mknodat (dir_fd, "some-fifo", 0777 | S_IFIFO, 0);
87 if (e == -1)
88 {
89 if (errno == ENOSYS)
90 {
91 puts ("*at functions not supported");
92 return 0;
93 }
94
95 puts ("fifo creation failed");
96 return 1;
97 }
98
99 struct stat64 st1;
100 if (fstatat64 (dir_fd, "some-fifo", &st1, 0) != 0)
101 {
102 puts ("fstat64 failed");
103 return 1;
104 }
105 if (!S_ISFIFO (st1.st_mode))
106 {
107 puts ("mknodat did not create a fifo");
108 return 1;
109 }
110
111 dupfd = dup (dir_fd);
112 if (dupfd == -1)
113 {
114 puts ("dup failed");
115 return 1;
116 }
117 if (lseek (dupfd, 0, SEEK_SET) != 0)
118 {
119 puts ("1st lseek failed");
120 return 1;
121 }
122
123 dir = fdopendir (dupfd);
124 if (dir == NULL)
125 {
126 puts ("2nd fdopendir failed");
127 return 1;
128 }
129 bool has_some_fifo = false;
130 while ((d = readdir64 (dir)) != NULL)
131 if (strcmp (d->d_name, "some-fifo") == 0)
132 {
133 has_some_fifo = true;
134 if (d->d_type != DT_UNKNOWN && d->d_type != DT_FIFO)
135 {
136 puts ("d_type for some-fifo wrong");
137 return 1;
138 }
139 }
140 else if (strcmp (d->d_name, ".") != 0 && strcmp (d->d_name, "..") != 0)
141 {
142 printf ("temp directory contains file \"%s\"\n", d->d_name);
143 return 1;
144 }
145 closedir (dir);
146
147 if (!has_some_fifo)
148 {
149 puts ("some-fifo not in directory list");
150 return 1;
151 }
152
153 if (unlinkat (dir_fd, "some-fifo", 0) != 0)
154 {
155 puts ("unlinkat failed");
156 return 1;
157 }
158
159 close (dir_fd);
160
161 return 0;
162 }
163