308 lines
6.4 KiB
C
308 lines
6.4 KiB
C
/*
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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 <sys/types.h>
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#include <dirent.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <errno.h>
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#include <sys/param.h>
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#include <sys/stat.h>
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#include "ext2_fs.h"
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#ifdef __GNUC__
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#define EXT2FS_ATTR(x) __attribute__(x)
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#else
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#define EXT2FS_ATTR(x)
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#endif
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#ifndef S_ISLNK /* So we can compile even with gcc-warn */
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# ifdef __S_IFLNK
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# define S_ISLNK(mode) __S_ISTYPE((mode), __S_IFLNK)
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# else
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# define S_ISLNK(mode) 0
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# endif
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#endif
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#include "e2fsbb.h"
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#include "e2p/e2p.h"
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#define main chattr_main
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static int add;
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static int rem;
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static int set;
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static int set_version;
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static unsigned long version;
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static int recursive;
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static int verbose;
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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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#ifdef _LFS64_LARGEFILE
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#define LSTAT lstat64
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#define STRUCT_STAT struct stat64
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#else
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#define LSTAT lstat
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#define STRUCT_STAT struct stat
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#endif
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#if 0
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static void fatal_error(const char * fmt_string, int errcode)
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{
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fprintf (stderr, fmt_string, program_name);
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exit (errcode);
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}
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#define usage() fatal_error(_("usage: %s [-RV] [-+=AacDdijsSu] [-v version] files...\n"), \
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1)
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#endif
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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 != 0; fp++) {
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if (fp->optchar == c)
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return fp->flag;
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}
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return 0;
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}
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static int decode_arg (int * i, int argc, char ** argv)
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{
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char * p;
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char * tmp;
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unsigned long fl;
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switch (argv[*i][0])
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{
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case '-':
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for (p = &argv[*i][1]; *p; p++) {
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if (*p == 'R') {
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recursive = 1;
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continue;
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}
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if (*p == 'V') {
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verbose = 1;
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continue;
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}
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if (*p == 'v') {
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(*i)++;
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if (*i >= argc)
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usage ();
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version = strtol (argv[*i], &tmp, 0);
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if (*tmp) {
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com_err (program_name, 0,
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_("bad version - %s\n"),
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argv[*i]);
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usage ();
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}
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set_version = 1;
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continue;
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}
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if ((fl = get_flag(*p)) == 0)
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usage();
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rf |= fl;
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rem = 1;
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}
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break;
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case '+':
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add = 1;
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for (p = &argv[*i][1]; *p; p++) {
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if ((fl = get_flag(*p)) == 0)
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usage();
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af |= fl;
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}
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break;
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case '=':
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set = 1;
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for (p = &argv[*i][1]; *p; p++) {
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if ((fl = get_flag(*p)) == 0)
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usage();
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sf |= fl;
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}
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break;
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default:
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return EOF;
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break;
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}
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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 flags;
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STRUCT_STAT st;
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if (LSTAT (name, &st) == -1) {
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com_err (program_name, errno, _("while trying to stat %s"),
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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) &&
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!S_ISDIR(st.st_mode))
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return;
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if (set) {
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if (verbose) {
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printf (_("Flags of %s set as "), name);
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print_flags (stdout, sf, 0);
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printf ("\n");
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}
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if (fsetflags (name, sf) == -1)
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perror (name);
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} else {
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if (fgetflags (name, &flags) == -1)
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com_err (program_name, errno,
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_("while reading flags on %s"), name);
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else {
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if (rem)
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flags &= ~rf;
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if (add)
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flags |= af;
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if (verbose) {
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printf (_("Flags of %s set as "), name);
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print_flags (stdout, flags, 0);
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printf ("\n");
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}
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if (!S_ISDIR(st.st_mode))
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flags &= ~EXT2_DIRSYNC_FL;
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if (fsetflags (name, flags) == -1)
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com_err (program_name, errno,
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_("while setting flags on %s"), name);
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}
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}
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if (set_version) {
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if (verbose)
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printf (_("Version of %s set as %lu\n"), name, version);
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if (fsetversion (name, version) == -1)
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com_err (program_name, errno,
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_("while setting version on %s"), name);
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}
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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 EXT2FS_ATTR((unused)))
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{
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if (strcmp (de->d_name, ".") && strcmp (de->d_name, "..")) {
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char *path;
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path = malloc(strlen (dir_name) + 1 + strlen (de->d_name) + 1);
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if (!path)
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fatal_error(_("Couldn't allocate path variable "
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"in chattr_dir_proc"), 1);
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sprintf (path, "%s/%s", dir_name, de->d_name);
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change_attributes (path);
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free(path);
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}
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return 0;
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}
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int main (int argc, char ** argv)
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{
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int i, j;
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int end_arg = 0;
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#ifdef ENABLE_NLS
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setlocale(LC_MESSAGES, "");
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setlocale(LC_CTYPE, "");
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bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
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textdomain(NLS_CAT_NAME);
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#endif
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#if 0
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if (argc && *argv)
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program_name = *argv;
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#endif
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i = 1;
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while (i < argc && !end_arg) {
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/* '--' arg should end option processing */
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if (strcmp(argv[i], "--") == 0) {
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i++;
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end_arg = 1;
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} else if (decode_arg (&i, argc, argv) == EOF)
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end_arg = 1;
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else
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i++;
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}
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if (i >= argc)
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usage ();
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if (set && (add || rem)) {
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fputs(_("= is incompatible with - and +\n"), stderr);
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exit (1);
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}
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if ((rf & af) != 0) {
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fputs("Can't both set and unset same flag.\n", stderr);
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exit (1);
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}
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if (!(add || rem || set || set_version)) {
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fputs(_("Must use '-v', =, - or +\n"), stderr);
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exit (1);
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}
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#if 0
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if (verbose)
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fprintf (stderr, "chattr %s (%s)\n",
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E2FSPROGS_VERSION, E2FSPROGS_DATE);
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#endif
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for (j = i; j < argc; j++)
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change_attributes (argv[j]);
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exit(0);
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}
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