1 /* vi: set sw=4 ts=4: */
3 * chattr.c - Change file attributes on an ext2 file system
5 * Copyright (C) 1993, 1994 Remy Card <card@masi.ibp.fr>
6 * Laboratoire MASI, Institut Blaise Pascal
7 * Universite Pierre et Marie Curie (Paris VI)
9 * This file can be redistributed under the terms of the GNU General
16 * 93/11/13 - Replace stat() calls by lstat() to avoid loops
17 * 94/02/27 - Integrated in Ted's distribution
18 * 98/12/29 - Ignore symlinks when working recursively (G M Sipe)
19 * 98/12/29 - Display version info only when -V specified (G M Sipe)
31 unsigned long version
;
38 static unsigned long get_flag(char c
)
40 const char *fp
= strchr(e2attr_flags_sname_chattr
, c
);
42 return e2attr_flags_value_chattr
[fp
- e2attr_flags_sname_chattr
];
46 static int decode_arg(const char *arg
, struct globals
*gp
)
55 } else if (opt
== '+') {
57 } else if (opt
== '=') {
63 *fl
|= get_flag(*arg
++);
68 static void change_attributes(const char *name
, struct globals
*gp
);
70 static int chattr_dir_proc(const char *dir_name
, struct dirent
*de
, void *gp
)
72 char *path
= concat_subpath_file(dir_name
, de
->d_name
);
73 /* path is NULL if de->d_name is "." or "..", else... */
75 change_attributes(path
, gp
);
81 static void change_attributes(const char *name
, struct globals
*gp
)
83 unsigned long fsflags
;
86 if (lstat(name
, &st
) != 0) {
87 bb_perror_msg("stat %s", name
);
90 if (S_ISLNK(st
.st_mode
) && gp
->recursive
)
93 /* Don't try to open device files, fifos etc. We probably
94 * ought to display an error if the file was explicitly given
95 * on the command line (whether or not recursive was
97 if (!S_ISREG(st
.st_mode
) && !S_ISLNK(st
.st_mode
) && !S_ISDIR(st
.st_mode
))
100 if (gp
->flags
& OPT_SET_VER
)
101 if (fsetversion(name
, gp
->version
) != 0)
102 bb_perror_msg("setting version on %s", name
);
104 if (gp
->flags
& OPT_SET
) {
107 if (fgetflags(name
, &fsflags
) != 0) {
108 bb_perror_msg("reading flags on %s", name
);
111 /*if (gp->flags & OPT_REM) - not needed, rf is zero otherwise */
113 /*if (gp->flags & OPT_ADD) - not needed, af is zero otherwise */
115 /* What is this? And why it's not done for SET case? */
116 if (!S_ISDIR(st
.st_mode
))
117 fsflags
&= ~EXT2_DIRSYNC_FL
;
119 if (fsetflags(name
, fsflags
) != 0)
120 bb_perror_msg("setting flags on %s", name
);
123 if (gp
->recursive
&& S_ISDIR(st
.st_mode
))
124 iterate_on_dir(name
, chattr_dir_proc
, gp
);
127 int chattr_main(int argc
, char **argv
) MAIN_EXTERNALLY_VISIBLE
;
128 int chattr_main(int argc UNUSED_PARAM
, char **argv
)
133 memset(&g
, 0, sizeof(g
));
136 while ((arg
= *++argv
)) {
137 /* take care of -R and -v <version> */
139 && (arg
[1] == 'R' || arg
[1] == 'v')
149 g
.version
= xatoul(*argv
);
150 g
.flags
|= OPT_SET_VER
;
154 if (!decode_arg(arg
, &g
))
158 /* run sanity checks on all the arguments given us */
161 if ((g
.flags
& OPT_SET
) && (g
.flags
& (OPT_ADD
|OPT_REM
)))
162 bb_error_msg_and_die("= is incompatible with - and +");
164 bb_error_msg_and_die("can't set and unset a flag");
166 bb_error_msg_and_die("must use '-v', =, - or +");
168 /* now run chattr on all the files passed to us */
169 do change_attributes(*argv
, &g
); while (*++argv
);