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
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
|
/* `rm' file deletion utility for GNU.
Copyright (C) 88, 90, 91, 1994-2003 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 2, 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, write to the Free Software Foundation,
Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* Written by Paul Rubin, David MacKenzie, and Richard Stallman.
Reworked to use chdir and avoid recursion by Jim Meyering. */
/* Implementation overview:
In the `usual' case, RM saves no state for directories it is processing.
When a removal fails (either due to an error or to an interactive `no'
reply), the failure is noted (see description of `ht' in remove.c's
remove_cwd_entries function) so that when/if the containing directory
is reopened, RM doesn't try to remove the entry again.
RM may delete arbitrarily deep hierarchies -- even ones in which file
names (from root to leaf) are longer than the system-imposed maximum.
It does this by using chdir to change to each directory in turn before
removing the entries in that directory.
RM detects directory cycles lazily. See lib/cycle-check.c.
RM is careful to avoid forming full file names whenever possible.
A full file name is formed only when it is about to be used -- e.g.
in a diagnostic or in an interactive-mode prompt.
RM minimizes the number of lstat system calls it makes. On systems
that have valid d_type data in directory entries, RM makes only one
lstat call per command line argument -- regardless of the depth of
the hierarchy. */
#include <config.h>
#include <stdio.h>
#include <getopt.h>
#include <sys/types.h>
#include <assert.h>
#include "system.h"
#include "dirname.h"
#include "error.h"
#include "remove.h"
#include "save-cwd.h"
/* The official name of this program (e.g., no `g' prefix). */
#define PROGRAM_NAME "rm"
#define WRITTEN_BY \
_("Written by Paul Rubin, David MacKenzie, Richard Stallman, and Jim Meyering.")
/* Name this program was run with. */
char *program_name;
/* For long options that have no equivalent short option, use a
non-character as a pseudo short option, starting with CHAR_MAX + 1. */
enum
{
PRESUME_INPUT_TTY_OPTION = CHAR_MAX + 1
};
static struct option const long_opts[] =
{
{"directory", no_argument, NULL, 'd'},
{"force", no_argument, NULL, 'f'},
{"interactive", no_argument, NULL, 'i'},
/* This is solely for testing. Do not document. */
/* It is relatively difficult to ensure that there is a tty on stdin.
Since rm acts differently depending on that, without this option,
it'd be harder to test the parts of rm that depend on that setting. */
{"presume-input-tty", no_argument, NULL, PRESUME_INPUT_TTY_OPTION},
{"recursive", no_argument, NULL, 'r'},
{"verbose", no_argument, NULL, 'v'},
{GETOPT_HELP_OPTION_DECL},
{GETOPT_VERSION_OPTION_DECL},
{NULL, 0, NULL, 0}
};
void
usage (int status)
{
if (status != 0)
fprintf (stderr, _("Try `%s --help' for more information.\n"),
program_name);
else
{
char *base = base_name (program_name);
printf (_("Usage: %s [OPTION]... FILE...\n"), program_name);
fputs (_("\
Remove (unlink) the FILE(s).\n\
\n\
-d, --directory unlink FILE, even if it is a non-empty directory\n\
(super-user only; this works only if your system\n\
supports `unlink' for nonempty directories)\n\
-f, --force ignore nonexistent files, never prompt\n\
-i, --interactive prompt before any removal\n\
-r, -R, --recursive remove the contents of directories recursively\n\
-v, --verbose explain what is being done\n\
"), stdout);
fputs (HELP_OPTION_DESCRIPTION, stdout);
fputs (VERSION_OPTION_DESCRIPTION, stdout);
printf (_("\
\n\
To remove a file whose name starts with a `-', for example `-foo',\n\
use one of these commands:\n\
%s -- -foo\n\
\n\
%s ./-foo\n\
"),
base, base);
fputs (_("\
\n\
Note that if you use rm to remove a file, it is usually possible to recover\n\
the contents of that file. If you want more assurance that the contents are\n\
truly unrecoverable, consider using shred.\n\
"), stdout);
printf (_("\nReport bugs to <%s>.\n"), PACKAGE_BUGREPORT);
}
exit (status);
}
static void
rm_option_init (struct rm_options *x)
{
x->unlink_dirs = 0;
x->ignore_missing_files = 0;
x->interactive = 0;
x->recursive = 0;
x->stdin_tty = isatty (STDIN_FILENO);
x->verbose = 0;
}
int
main (int argc, char **argv)
{
struct rm_options x;
int fail = 0;
int c;
initialize_main (&argc, &argv);
program_name = argv[0];
setlocale (LC_ALL, "");
bindtextdomain (PACKAGE, LOCALEDIR);
textdomain (PACKAGE);
atexit (close_stdout);
rm_option_init (&x);
while ((c = getopt_long (argc, argv, "dfirvR", long_opts, NULL)) != -1)
{
switch (c)
{
case 0: /* Long option. */
break;
case 'd':
x.unlink_dirs = 1;
break;
case 'f':
x.interactive = 0;
x.ignore_missing_files = 1;
break;
case 'i':
x.interactive = 1;
x.ignore_missing_files = 0;
break;
case 'r':
case 'R':
x.recursive = 1;
break;
case PRESUME_INPUT_TTY_OPTION:
x.stdin_tty = 1;
break;
case 'v':
x.verbose = 1;
break;
case_GETOPT_HELP_CHAR;
case_GETOPT_VERSION_CHAR (PROGRAM_NAME, WRITTEN_BY);
default:
usage (EXIT_FAILURE);
}
}
if (argc <= optind)
{
if (x.ignore_missing_files)
exit (EXIT_SUCCESS);
else
{
error (0, 0, _("too few arguments"));
usage (EXIT_FAILURE);
}
}
{
size_t n_files = argc - optind;
char const *const *file = (char const *const *) argv + optind;
enum RM_status status = rm (n_files, file, &x);
assert (VALID_STATUS (status));
if (status == RM_ERROR)
fail = 1;
}
exit (fail);
}
|
