chattr.c revision 3839e65723771b85975f4263102dd3ceec4523c0 
1/*
2 * chattr.c		- Change file attributes on an ext2 file system
3 *
4 * Copyright (C) 1993, 1994  Remy Card <card@masi.ibp.fr>
5 *                           Laboratoire MASI, Institut Blaise Pascal
6 *                           Universite Pierre et Marie Curie (Paris VI)
7 *
8 * This file can be redistributed under the terms of the GNU General
9 * Public License
10 */
11
12/*
13 * History:
14 * 93/10/30	- Creation
15 * 93/11/13	- Replace stat() calls by lstat() to avoid loops
16 * 94/02/27	- Integrated in Ted's distribution
17 */
18
19#include <dirent.h>
20#include <fcntl.h>
21#include <getopt.h>
22#include <stdio.h>
23#include <stdlib.h>
24#include <unistd.h>
25#include <sys/param.h>
26#include <sys/stat.h>
27#include <linux/ext2_fs.h>
28
29#include "et/com_err.h"
30#include "e2p/e2p.h"
31
32#include "../version.h"
33
34const char * program_name = "chattr";
35
36int add = 0;
37int rem = 0;
38int set = 0;
39int set_version = 0;
40
41unsigned long version;
42
43int recursive = 0;
44int verbose = 0;
45
46unsigned long af;
47unsigned long rf;
48unsigned long sf;
49
50static void volatile fatal_error (const char * fmt_string, int errcode)
51{
52	fprintf (stderr, fmt_string, program_name);
53	exit (errcode);
54}
55
56#define usage() fatal_error ("usage: %s [-RV] [-+=csu] [-v version] files...\n", \
57			     1)
58
59static int decode_arg (int * i, int argc, char ** argv)
60{
61	char * p;
62	char * tmp;
63
64	switch (argv[*i][0])
65	{
66	case '-':
67		for (p = &argv[*i][1]; *p; p++)
68			switch (*p)
69			{
70			case 'R':
71				recursive = 1;
72				break;
73			case 'S':
74				rf |= EXT2_SYNC_FL;
75				rem = 1;
76				break;
77			case 'V':
78				verbose = 1;
79				break;
80			case 'c':
81				rf |= EXT2_COMPR_FL;
82				rem = 1;
83				break;
84			case 's':
85				rf |= EXT2_SECRM_FL;
86				rem = 1;
87				break;
88			case 'u':
89				rf |= EXT2_UNRM_FL;
90				rem = 1;
91				break;
92			case 'v':
93				if (*i >= argc)
94					usage ();
95				(*i)++;
96				version = strtol (argv[*i], &tmp, 0);
97				if (*tmp)
98				{
99					com_err (program_name, 0,
100						 "bad version - %s\n", argv[*i]);
101					usage ();
102				}
103				set_version = 1;
104				break;
105			default:
106				fprintf (stderr, "%s: Unrecognized argument: %c\n",
107					 program_name, *p);
108				usage ();
109			}
110		break;
111	case '+':
112		add = 1;
113		for (p = &argv[*i][1]; *p; p++)
114			switch (*p)
115			{
116			case 'S':
117				af |= EXT2_SYNC_FL;
118				break;
119			case 'c':
120				af |= EXT2_COMPR_FL;
121				break;
122			case 's':
123				af |= EXT2_SECRM_FL;
124				break;
125			case 'u':
126				af |= EXT2_UNRM_FL;
127				break;
128			default:
129				usage ();
130			}
131		break;
132	case '=':
133		set = 1;
134		for (p = &argv[*i][1]; *p; p++)
135			switch (*p)
136			{
137			case 'S':
138				sf |= EXT2_SYNC_FL;
139				break;
140			case 'c':
141				sf |= EXT2_COMPR_FL;
142				break;
143			case 's':
144				sf |= EXT2_SECRM_FL;
145				break;
146			case 'u':
147				sf |= EXT2_UNRM_FL;
148				break;
149			default:
150				usage ();
151			}
152		break;
153	default:
154		return EOF;
155		break;
156	}
157	return 1;
158}
159
160static int chattr_dir_proc (const char *, struct dirent *, void *);
161
162static void change_attributes (const char * name)
163{
164	unsigned long flags;
165	struct stat st;
166
167	if (lstat (name, &st) == -1)
168	{
169		com_err (program_name, errno, "while stating %s", name);
170		return;
171	}
172	if (set)
173	{
174		if (verbose)
175		{
176			printf ("Flags of %s set as ", name);
177			print_flags (stdout, sf);
178			printf ("\n");
179		}
180		if (fsetflags (name, sf) == -1)
181			perror (name);
182	}
183	else
184	{
185		if (fgetflags (name, &flags) == -1)
186			com_err (program_name, errno,
187			         "while reading flags on %s", name);
188		else
189		{
190			if (rem)
191				flags &= ~rf;
192			if (add)
193				flags |= af;
194			if (verbose)
195			{
196				printf ("Flags of %s set as ", name);
197				print_flags (stdout, flags);
198				printf ("\n");
199			}
200			if (fsetflags (name, flags) == -1)
201				com_err (program_name, errno,
202				         "while setting flags on %s", name);
203		}
204	}
205	if (set_version)
206	{
207		if (verbose)
208			printf ("Version of %s set as %lu\n", name, version);
209		if (fsetversion (name, version) == -1)
210			com_err (program_name, errno,
211			         "while setting version on %s", name);
212	}
213	if (S_ISDIR(st.st_mode) && recursive)
214		iterate_on_dir (name, chattr_dir_proc, (void *) NULL);
215}
216
217static int chattr_dir_proc (const char * dir_name, struct dirent * de, void * private)
218{
219	char path[MAXPATHLEN];
220
221	if (strcmp (de->d_name, ".") && strcmp (de->d_name, ".."))
222	{
223		sprintf (path, "%s/%s", dir_name, de->d_name);
224		change_attributes (path);
225	}
226	return 0;
227}
228
229void main (int argc, char ** argv)
230{
231	int i, j;
232	int end_arg = 0;
233
234	fprintf (stderr, "chattr %s, %s for EXT2 FS %s, %s\n",
235		 E2FSPROGS_VERSION, E2FSPROGS_DATE,
236		 EXT2FS_VERSION, EXT2FS_DATE);
237	if (argc && *argv)
238		program_name = *argv;
239	i = 1;
240	while (i < argc && !end_arg)
241	{
242		if (decode_arg (&i, argc, argv) == EOF)
243			end_arg = 1;
244		else
245			i++;
246	}
247	if (i >= argc)
248		usage ();
249	if (set && (add || rem))
250	{
251		fprintf (stderr, "= is incompatible with - and +\n");
252		exit (1);
253	}
254	if (!(add || rem || set))
255	{
256		fprintf (stderr, "Must use =, - or +\n");
257		exit (1);
258	}
259	for (j = i; j < argc; j++)
260		change_attributes (argv[j]);
261}
262