/*
* chattr.c - Change file attributes on an ext2 file system
*
* Copyright (C) 1993, 1994 Remy Card
* 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)
*/
#define _LARGEFILE64_SOURCE
#include "config.h"
#include
#include
#include
#include
#include
#include
#include
#ifdef HAVE_ERRNO_H
#include
#endif
#include
#include
#include "ext2fs/ext2_fs.h"
#ifdef __GNUC__
#define EXT2FS_ATTR(x) __attribute__(x)
#else
#define EXT2FS_ATTR(x)
#endif
#ifndef S_ISLNK /* So we can compile even with gcc-warn */
# ifdef __S_IFLNK
# define S_ISLNK(mode) __S_ISTYPE((mode), __S_IFLNK)
# else
# define S_ISLNK(mode) 0
# endif
#endif
#include "et/com_err.h"
#include "e2p/e2p.h"
#include "../version.h"
#include "nls-enable.h"
static const char * program_name = "chattr";
static int add;
static int rem;
static int set;
static int set_version;
static unsigned long version;
static int recursive;
static int verbose;
static int silent;
static unsigned long af;
static unsigned long rf;
static unsigned long sf;
#ifdef _LFS64_LARGEFILE
#define LSTAT lstat64
#define STRUCT_STAT struct stat64
#else
#define LSTAT lstat
#define STRUCT_STAT struct stat
#endif
static void usage(void)
{
fprintf(stderr,
_("Usage: %s [-RVf] [-+=AaCcDdeijsSu] [-v version] files...\n"),
program_name);
exit(1);
}
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' },
{ EXT4_EXTENTS_FL, 'e'},
{ 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' },
{ FS_NOCOW_FL, 'C' },
{ 0, 0 }
};
static unsigned long get_flag(char c)
{
const struct flags_char *fp;
for (fp = flags_array; fp->flag != 0; fp++) {
if (fp->optchar == c)
return fp->flag;
}
return 0;
}
static int decode_arg (int * i, int argc, char ** argv)
{
char * p;
char * tmp;
unsigned long fl;
switch (argv[*i][0])
{
case '-':
for (p = &argv[*i][1]; *p; p++) {
if (*p == 'R') {
recursive = 1;
continue;
}
if (*p == 'V') {
verbose = 1;
continue;
}
if (*p == 'f') {
silent = 1;
continue;
}
if (*p == 'v') {
(*i)++;
if (*i >= argc)
usage ();
version = strtol (argv[*i], &tmp, 0);
if (*tmp) {
com_err (program_name, 0,
_("bad version - %s\n"),
argv[*i]);
usage ();
}
set_version = 1;
continue;
}
if ((fl = get_flag(*p)) == 0)
usage();
rf |= fl;
rem = 1;
}
break;
case '+':
add = 1;
for (p = &argv[*i][1]; *p; p++) {
if ((fl = get_flag(*p)) == 0)
usage();
af |= fl;
}
break;
case '=':
set = 1;
for (p = &argv[*i][1]; *p; p++) {
if ((fl = get_flag(*p)) == 0)
usage();
sf |= fl;
}
break;
default:
return EOF;
break;
}
return 1;
}
static int chattr_dir_proc(const char *, struct dirent *, void *);
static int change_attributes(const char * name)
{
unsigned long flags;
STRUCT_STAT st;
int extent_file = 0;
if (LSTAT (name, &st) == -1) {
if (!silent)
com_err (program_name, errno,
_("while trying to stat %s"), name);
return -1;
}
if (fgetflags(name, &flags) == -1) {
if (!silent)
com_err(program_name, errno,
_("while reading flags on %s"), name);
return -1;
}
if (flags & EXT4_EXTENTS_FL)
extent_file = 1;
if (set) {
if (extent_file && !(sf & EXT4_EXTENTS_FL)) {
if (!silent)
com_err(program_name, 0,
_("Clearing extent flag not supported on %s"),
name);
return -1;
}
if (verbose) {
printf (_("Flags of %s set as "), name);
print_flags (stdout, sf, 0);
printf ("\n");
}
if (fsetflags (name, sf) == -1)
perror (name);
} else {
if (rem)
flags &= ~rf;
if (add)
flags |= af;
if (extent_file && !(flags & EXT4_EXTENTS_FL)) {
if (!silent)
com_err(program_name, 0,
_("Clearing extent flag not supported on %s"),
name);
return -1;
}
if (verbose) {
printf(_("Flags of %s set as "), name);
print_flags(stdout, flags, 0);
printf("\n");
}
if (!S_ISDIR(st.st_mode))
flags &= ~EXT2_DIRSYNC_FL;
if (fsetflags(name, flags) == -1) {
if (!silent) {
com_err(program_name, errno,
_("while setting flags on %s"),
name);
}
return -1;
}
}
if (set_version) {
if (verbose)
printf (_("Version of %s set as %lu\n"), name, version);
if (fsetversion (name, version) == -1) {
if (!silent)
com_err (program_name, errno,
_("while setting version on %s"),
name);
return -1;
}
}
if (S_ISDIR(st.st_mode) && recursive)
return iterate_on_dir (name, chattr_dir_proc, NULL);
return 0;
}
static int chattr_dir_proc (const char * dir_name, struct dirent * de,
void * private EXT2FS_ATTR((unused)))
{
int ret = 0;
if (strcmp (de->d_name, ".") && strcmp (de->d_name, "..")) {
char *path;
path = malloc(strlen (dir_name) + 1 + strlen (de->d_name) + 1);
if (!path) {
fprintf(stderr, _("Couldn't allocate path variable "
"in chattr_dir_proc"));
return -1;
}
sprintf(path, "%s/%s", dir_name, de->d_name);
ret = change_attributes(path);
free(path);
}
return ret;
}
int main (int argc, char ** argv)
{
int i, j;
int end_arg = 0;
int err, retval = 0;
#ifdef ENABLE_NLS
setlocale(LC_MESSAGES, "");
setlocale(LC_CTYPE, "");
bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
textdomain(NLS_CAT_NAME);
set_com_err_gettext(gettext);
#endif
if (argc && *argv)
program_name = *argv;
i = 1;
while (i < argc && !end_arg) {
/* '--' arg should end option processing */
if (strcmp(argv[i], "--") == 0) {
i++;
end_arg = 1;
} else if (decode_arg (&i, argc, argv) == EOF)
end_arg = 1;
else
i++;
}
if (i >= argc)
usage ();
if (set && (add || rem)) {
fputs(_("= is incompatible with - and +\n"), stderr);
exit (1);
}
if ((rf & af) != 0) {
fputs("Can't both set and unset same flag.\n", stderr);
exit (1);
}
if (!(add || rem || set || set_version)) {
fputs(_("Must use '-v', =, - or +\n"), stderr);
exit (1);
}
if (verbose)
fprintf (stderr, "chattr %s (%s)\n",
E2FSPROGS_VERSION, E2FSPROGS_DATE);
for (j = i; j < argc; j++) {
err = change_attributes (argv[j]);
if (err)
retval = 1;
}
exit(retval);
}
不知道是不是这个？
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