diff options
Diffstat (limited to 'e2fsprogs/chattr.c')
| -rw-r--r-- | e2fsprogs/chattr.c | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/e2fsprogs/chattr.c b/e2fsprogs/chattr.c new file mode 100644 index 0000000..28a3917 --- /dev/null +++ b/e2fsprogs/chattr.c @@ -0,0 +1,199 @@ +/* vi: set sw=4 ts=4: */ +/* + * chattr.c - Change file attributes on an ext2 file system + * + * Copyright (C) 1993, 1994 Remy Card <card@masi.ibp.fr> + * Laboratoire MASI, Institut Blaise Pascal + * Universite Pierre et Marie Curie (Paris VI) + * + * This file can be redistributed under the terms of the GNU General + * Public License + */ + +/* + * History: + * 93/10/30 - Creation + * 93/11/13 - Replace stat() calls by lstat() to avoid loops + * 94/02/27 - Integrated in Ted's distribution + * 98/12/29 - Ignore symlinks when working recursively (G M Sipe) + * 98/12/29 - Display version info only when -V specified (G M Sipe) + */ + +#include "busybox.h" +#include "e2fs_lib.h" + +#define OPT_ADD 1 +#define OPT_REM 2 +#define OPT_SET 4 +#define OPT_SET_VER 8 +static int flags; +static int recursive; + +static unsigned long version; + +static unsigned long af; +static unsigned long rf; +static unsigned long sf; + +struct flags_char { + unsigned long flag; + char optchar; +}; + +static const struct flags_char flags_array[] = { + { EXT2_NOATIME_FL, 'A' }, + { EXT2_SYNC_FL, 'S' }, + { EXT2_DIRSYNC_FL, 'D' }, + { EXT2_APPEND_FL, 'a' }, + { EXT2_COMPR_FL, 'c' }, + { EXT2_NODUMP_FL, 'd' }, + { EXT2_IMMUTABLE_FL, 'i' }, + { EXT3_JOURNAL_DATA_FL, 'j' }, + { EXT2_SECRM_FL, 's' }, + { EXT2_UNRM_FL, 'u' }, + { EXT2_NOTAIL_FL, 't' }, + { EXT2_TOPDIR_FL, 'T' }, + { 0, 0 } +}; + +static unsigned long get_flag(char c) +{ + const struct flags_char *fp; + for (fp = flags_array; fp->flag; fp++) + if (fp->optchar == c) + return fp->flag; + bb_show_usage(); + /*return 0;*/ +} + +static int decode_arg(char *arg) +{ + unsigned long *fl; + char opt = *arg++; + + if (opt == '-') { + flags |= OPT_REM; + fl = &rf; + } else if (opt == '+') { + flags |= OPT_ADD; + fl = ⁡ + } else if (opt == '=') { + flags |= OPT_SET; + fl = &sf; + } else + return 0; + + while (*arg) + *fl |= get_flag(*arg++); + + return 1; +} + +static int chattr_dir_proc(const char *, struct dirent *, void *); + +static void change_attributes(const char * name) +{ + unsigned long fsflags; + struct stat st; + + if (lstat(name, &st) == -1) { + bb_error_msg("stat %s failed", name); + return; + } + if (S_ISLNK(st.st_mode) && recursive) + return; + + /* Don't try to open device files, fifos etc. We probably + * ought to display an error if the file was explicitly given + * on the command line (whether or not recursive was + * requested). */ + if (!S_ISREG(st.st_mode) && !S_ISLNK(st.st_mode) && !S_ISDIR(st.st_mode)) + return; + + if (flags & OPT_SET_VER) + if (fsetversion(name, version) == -1) + bb_error_msg("setting version on %s", name); + + if (flags & OPT_SET) { + fsflags = sf; + } else { + if (fgetflags(name, &fsflags) == -1) { + bb_error_msg("reading flags on %s", name); + goto skip_setflags; + } + if (flags & OPT_REM) + fsflags &= ~rf; + if (flags & OPT_ADD) + fsflags |= af; + if (!S_ISDIR(st.st_mode)) + fsflags &= ~EXT2_DIRSYNC_FL; + } + if (fsetflags(name, fsflags) == -1) + bb_error_msg("setting flags on %s", name); + + skip_setflags: + if (S_ISDIR(st.st_mode) && recursive) + iterate_on_dir(name, chattr_dir_proc, NULL); +} + +static int chattr_dir_proc(const char *dir_name, struct dirent *de, + void *private ATTRIBUTE_UNUSED) +{ + /*if (strcmp(de->d_name, ".") || strcmp(de->d_name, "..")) {*/ + if (de->d_name[0] == '.' + && (!de->d_name[1] || LONE_CHAR(de->d_name+1, '.')) + ) { + char *path = concat_subpath_file(dir_name, de->d_name); + if (path) { + change_attributes(path); + free(path); + } + } + return 0; +} + +int chattr_main(int argc, char **argv) +{ + int i; + char *arg; + + /* parse the args */ + for (i = 1; i < argc; ++i) { + arg = argv[i]; + + /* take care of -R and -v <version> */ + if (arg[0] == '-') { + if (arg[1] == 'R' && arg[2] == '\0') { + recursive = 1; + continue; + } + if (arg[1] == 'v' && arg[2] == '\0') { + ++i; + if (i >= argc) + bb_show_usage(); + version = xatoul(argv[i]); + flags |= OPT_SET_VER; + continue; + } + } + + if (!decode_arg(arg)) + break; + } + + /* run sanity checks on all the arguments given us */ + if (i >= argc) + bb_show_usage(); + if ((flags & OPT_SET) && (flags & (OPT_ADD|OPT_REM))) + bb_error_msg_and_die("= is incompatible with - and +"); + if (rf & af) + bb_error_msg_and_die("Can't set and unset a flag"); + if (!flags) + bb_error_msg_and_die("Must use '-v', =, - or +"); + + /* now run chattr on all the files passed to us */ + while (i < argc) + change_attributes(argv[i++]); + + return EXIT_SUCCESS; +} |