put small subset of e2fsprogs back in the tree:
lsattr, chattr, fsck. Old e2fsprogs tree is in e2fsprogs/old_e2fsprogs/*.
This commit is contained in:
Denis Vlasenko
199
e2fsprogs/chattr.c
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199
e2fsprogs/chattr.c
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@@ -0,0 +1,199 @@
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/* vi: set sw=4 ts=4: */
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/*
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* chattr.c - Change file attributes on an ext2 file system
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*
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* Copyright (C) 1993, 1994 Remy Card <card@masi.ibp.fr>
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* Laboratoire MASI, Institut Blaise Pascal
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* Universite Pierre et Marie Curie (Paris VI)
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*
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* This file can be redistributed under the terms of the GNU General
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* Public License
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*/
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/*
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* History:
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* 93/10/30 - Creation
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* 93/11/13 - Replace stat() calls by lstat() to avoid loops
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* 94/02/27 - Integrated in Ted's distribution
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* 98/12/29 - Ignore symlinks when working recursively (G M Sipe)
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* 98/12/29 - Display version info only when -V specified (G M Sipe)
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*/
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#include "busybox.h"
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#include "e2fs_lib.h"
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#define OPT_ADD 1
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#define OPT_REM 2
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#define OPT_SET 4
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#define OPT_SET_VER 8
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static int flags;
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static int recursive;
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static unsigned long version;
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static unsigned long af;
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static unsigned long rf;
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static unsigned long sf;
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struct flags_char {
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unsigned long flag;
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char optchar;
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};
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static const struct flags_char flags_array[] = {
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{ EXT2_NOATIME_FL, 'A' },
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{ EXT2_SYNC_FL, 'S' },
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{ EXT2_DIRSYNC_FL, 'D' },
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{ EXT2_APPEND_FL, 'a' },
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{ EXT2_COMPR_FL, 'c' },
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{ EXT2_NODUMP_FL, 'd' },
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{ EXT2_IMMUTABLE_FL, 'i' },
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{ EXT3_JOURNAL_DATA_FL, 'j' },
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{ EXT2_SECRM_FL, 's' },
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{ EXT2_UNRM_FL, 'u' },
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{ EXT2_NOTAIL_FL, 't' },
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{ EXT2_TOPDIR_FL, 'T' },
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{ 0, 0 }
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};
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static unsigned long get_flag(char c)
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{
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const struct flags_char *fp;
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for (fp = flags_array; fp->flag; fp++)
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if (fp->optchar == c)
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return fp->flag;
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bb_show_usage();
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/*return 0;*/
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}
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static int decode_arg(char *arg)
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{
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unsigned long *fl;
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char opt = *arg++;
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if (opt == '-') {
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flags |= OPT_REM;
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fl = &rf;
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} else if (opt == '+') {
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flags |= OPT_ADD;
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fl = ⁡
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} else if (opt == '=') {
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flags |= OPT_SET;
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fl = &sf;
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} else
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return 0;
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while (*arg)
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*fl |= get_flag(*arg++);
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return 1;
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}
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static int chattr_dir_proc(const char *, struct dirent *, void *);
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static void change_attributes(const char * name)
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{
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unsigned long fsflags;
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struct stat st;
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if (lstat(name, &st) == -1) {
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bb_error_msg("stat %s failed", name);
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return;
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}
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if (S_ISLNK(st.st_mode) && recursive)
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return;
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/* Don't try to open device files, fifos etc. We probably
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* ought to display an error if the file was explicitly given
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* on the command line (whether or not recursive was
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* requested). */
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if (!S_ISREG(st.st_mode) && !S_ISLNK(st.st_mode) && !S_ISDIR(st.st_mode))
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return;
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if (flags & OPT_SET_VER)
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if (fsetversion(name, version) == -1)
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bb_error_msg("setting version on %s", name);
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if (flags & OPT_SET) {
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fsflags = sf;
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} else {
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if (fgetflags(name, &fsflags) == -1) {
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bb_error_msg("reading flags on %s", name);
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goto skip_setflags;
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}
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if (flags & OPT_REM)
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fsflags &= ~rf;
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if (flags & OPT_ADD)
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fsflags |= af;
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if (!S_ISDIR(st.st_mode))
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fsflags &= ~EXT2_DIRSYNC_FL;
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}
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if (fsetflags(name, fsflags) == -1)
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bb_error_msg("setting flags on %s", name);
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skip_setflags:
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if (S_ISDIR(st.st_mode) && recursive)
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iterate_on_dir(name, chattr_dir_proc, NULL);
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}
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static int chattr_dir_proc(const char *dir_name, struct dirent *de,
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void *private ATTRIBUTE_UNUSED)
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{
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/*if (strcmp(de->d_name, ".") || strcmp(de->d_name, "..")) {*/
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if (de->d_name[0] == '.'
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&& (!de->d_name[1] || LONE_CHAR(de->d_name+1, '.'))
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) {
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char *path = concat_subpath_file(dir_name, de->d_name);
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if (path) {
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change_attributes(path);
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free(path);
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}
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}
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return 0;
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}
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int chattr_main(int argc, char **argv)
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{
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int i;
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char *arg;
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/* parse the args */
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for (i = 1; i < argc; ++i) {
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arg = argv[i];
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/* take care of -R and -v <version> */
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if (arg[0] == '-') {
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if (arg[1] == 'R' && arg[2] == '\0') {
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recursive = 1;
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continue;
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}
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if (arg[1] == 'v' && arg[2] == '\0') {
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++i;
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if (i >= argc)
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bb_show_usage();
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version = xatoul(argv[i]);
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flags |= OPT_SET_VER;
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continue;
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}
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}
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if (!decode_arg(arg))
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break;
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}
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/* run sanity checks on all the arguments given us */
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if (i >= argc)
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bb_show_usage();
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if ((flags & OPT_SET) && (flags & (OPT_ADD|OPT_REM)))
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bb_error_msg_and_die("= is incompatible with - and +");
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if (rf & af)
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bb_error_msg_and_die("Can't set and unset a flag");
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if (!flags)
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bb_error_msg_and_die("Must use '-v', =, - or +");
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/* now run chattr on all the files passed to us */
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while (i < argc)
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change_attributes(argv[i++]);
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return EXIT_SUCCESS;
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}
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