1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
|
/* Test the fts function.
Copyright 2017-2022 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
#include <config.h>
#include <fts_.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <unistd.h>
#define BASE "t-fts.tmp"
static char base[] = BASE; /* Not const, since argv needs non-const. */
static char const base_d[] = BASE "/d";
static char *const argv[2] = { base, 0 };
static void
perror_exit (char const *message, int status)
{
perror (message);
exit (status);
}
/* alloc/dealloc to ensure structures initialized appropriately. */
static void
fts_dealloc (void)
{
static char dir[] = "./";
static char *const curr_dir[2] = { dir, 0 };
FTS *ftsp = fts_open (curr_dir, FTS_NOSTAT | FTS_PHYSICAL | FTS_CWDFD, 0);
if (ftsp)
{
if (fts_close (ftsp) != 0)
perror_exit ("fts_close", 9);
}
else
perror_exit (base, 10);
}
/* Remove BASE and all files under it. */
static void
remove_tree (void)
{
FTSENT *e;
FTS *ftsp = fts_open (argv, FTS_NOSTAT | FTS_PHYSICAL | FTS_CWDFD, 0);
if (ftsp)
{
while ((e = fts_read (ftsp)))
{
int status = 0;
switch (e->fts_info)
{
case FTS_DP:
status = unlinkat (ftsp->fts_cwd_fd, e->fts_accpath,
AT_REMOVEDIR);
break;
case FTS_F: case FTS_NSOK:
status = unlinkat (ftsp->fts_cwd_fd, e->fts_accpath, 0);
break;
}
if (status != 0)
perror_exit (e->fts_path, 1);
}
if (fts_close (ftsp) != 0)
perror_exit ("fts_close", 2);
}
else if (errno != ENOENT)
perror_exit (base, 3);
}
int
main (void)
{
FTS *ftsp;
FTSENT *e;
char buf[sizeof BASE + 100];
int i;
enum { needles = 4 };
int needles_seen = 0;
struct stat st;
remove_tree ();
/* Create directories BASE, BASE/d, BASE/d/1, BASE/d/2, ..., BASE/d/65536,
to stress-test fts. Stop if directory creation fails due to
EMFILE or EMLINK problems, or if BASE/d's link count no longer matches the
Unix tradition. See:
https://bugzilla.kernel.org/show_bug.cgi?id=196405
for more info. */
if (mkdir (BASE, 0777) != 0)
perror_exit (base, 4);
if (mkdir (base_d, 0777) != 0)
perror_exit (base_d, 5);
for (i = 1; i <= 65536; i++)
{
sprintf (buf, "%s/d/%i", base, i);
if (mkdir (buf, 0777) != 0)
{
if (errno == EMFILE || errno == EMLINK)
break;
if (i <= needles)
perror_exit (buf, 77);
break;
}
if (needles < i && stat (base_d, &st) == 0 && st.st_nlink != i + 2)
break;
}
/* Create empty files BASE/d/1/needle etc. */
for (i = 1; i <= needles; i++)
{
int fd;
sprintf (buf, "%s/d/%d/needle", base, i);
fd = open (buf, O_WRONLY | O_CREAT, 0666);
if (fd < 0 || close (fd) != 0)
perror_exit (buf, 77);
}
/* Use fts to look for the needles. */
ftsp = fts_open (argv, FTS_SEEDOT | FTS_NOSTAT | FTS_PHYSICAL | FTS_CWDFD, 0);
if (!ftsp)
perror_exit (base, 6);
while ((e = fts_read (ftsp)))
needles_seen += strcmp (e->fts_name, "needle") == 0;
int fts_read_errno = errno;
fflush (stdout);
if (fts_read_errno)
{
errno = fts_read_errno;
perror_exit ("fts_read", 7);
}
if (fts_close (ftsp) != 0)
perror_exit (base, 8);
/* Report an error if we did not find the needles. */
if (needles_seen != needles)
{
fprintf (stderr, "%d needles found (should be %d)\n",
needles_seen, needles);
return 1;
}
remove_tree ();
if (stat (base, &st) == 0)
{
fprintf (stderr, "fts could not remove directory\n");
return 1;
}
fts_dealloc ();
return 0;
}
|
