summaryrefslogtreecommitdiff
path: root/src/rm.c
blob: 4d15cfafb293bb67944c36cb47b43a23af626d3a (plain)
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
/* `rm' file deletion utility for GNU.
   Copyright (C) 88, 90, 91, 1994-1999 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 hash tables 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 by maintaining a table of the currently
   active directories.  See the description of active_dir_map in remove.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 "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 AUTHORS \
  "Paul Rubin, David MacKenzie, Richard Stallman, and Jim Meyering"

void strip_trailing_slashes ();

/* Name this program was run with.  */
char *program_name;

static struct option const long_opts[] =
{
  {"directory", no_argument, NULL, 'd'},
  {"force", no_argument, NULL, 'f'},
  {"interactive", no_argument, NULL, 'i'},
  {"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
    {
      printf (_("Usage: %s [OPTION]... FILE...\n"), program_name);
      printf (_("\
Remove (unlink) the FILE(s).\n\
\n\
  -d, --directory       unlink directory, even if non-empty (super-user only)\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\
      --help            display this help and exit\n\
      --version         output version information and exit\n\
"));
      puts (_("\nReport bugs to <bug-fileutils@gnu.org>."));
      close_stdout ();
    }
  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;

  program_name = argv[0];
  setlocale (LC_ALL, "");
  bindtextdomain (PACKAGE, LOCALEDIR);
  textdomain (PACKAGE);

  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 'v':
	  x.verbose = 1;
	  break;
	case_GETOPT_HELP_CHAR;
	case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
	default:
	  usage (1);
	}
    }

  if (optind == argc)
    {
      if (x.ignore_missing_files)
	exit (0);
      else
	{
	  error (0, 0, _("too few arguments"));
	  usage (1);
	}
    }

  remove_init ();

  for (; optind < argc; optind++)
    {
      struct File_spec fs;
      enum RM_status status;

      /* Stripping slashes is harmless for rmdir;
	 if the arg is not a directory, it will fail with ENOTDIR.  */
      strip_trailing_slashes (argv[optind]);
      fspec_init_file (&fs, argv[optind]);
      status = rm (&fs, 1, &x);
      assert (VALID_STATUS (status));
      if (status == RM_ERROR)
	fail = 1;
    }

  remove_fini ();

  if (x.verbose)
    close_stdout ();
  exit (fail);
}