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/* vi: set sw=4 ts=4: */
/*
* lsattr.c - List 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
*/
//config:config LSATTR
//config: bool "lsattr (5.5 kb)"
//config: default y
//config: help
//config: lsattr lists the file attributes on a second extended file system.
//applet:IF_LSATTR(APPLET_NOEXEC(lsattr, lsattr, BB_DIR_BIN, BB_SUID_DROP, lsattr))
/* ls is NOEXEC, so we should be too! ;) */
//kbuild:lib-$(CONFIG_LSATTR) += lsattr.o e2fs_lib.o
//usage:#define lsattr_trivial_usage
//usage: "[-Radlpv] [FILE]..."
//usage:#define lsattr_full_usage "\n\n"
//usage: "List ext2 file attributes\n"
//usage: "\n -R Recurse"
//usage: "\n -a Include names starting with ."
//usage: "\n -d List directory names, not contents"
// -a,-d text should match ls --help
//usage: "\n -l List long flag names"
//usage: "\n -p List project ID"
//usage: "\n -v List version/generation number"
#include "libbb.h"
#include "e2fs_lib.h"
enum {
OPT_RECUR = 1 << 0,
OPT_ALL = 1 << 1,
OPT_DIRS_OPT = 1 << 2,
OPT_PF_LONG = 1 << 3,
OPT_GENERATION = 1 << 4,
OPT_PROJID = 1 << 5,
};
static void list_attributes(const char *name)
{
unsigned fsflags;
int fd, r;
/* There is no way to run needed ioctls on a symlink.
* open(O_PATH | O_NOFOLLOW) _can_ be used to get a fd referring to the symlink,
* but ioctls fail on such a fd (tried on 4.12.0 kernel).
* e2fsprogs-1.46.2 uses open(O_NOFOLLOW), it fails on symlinks.
*/
fd = open_or_warn(name, O_RDONLY | O_NONBLOCK | O_NOCTTY | O_NOFOLLOW);
if (fd < 0)
return;
if (option_mask32 & OPT_PROJID) {
struct ext2_fsxattr fsxattr;
r = ioctl(fd, EXT2_IOC_FSGETXATTR, &fsxattr);
/* note: ^^^ may fail in 32-bit userspace on 64-bit kernel (seen on 4.12.0) */
if (r != 0)
goto read_err;
printf("%5u ", (unsigned)fsxattr.fsx_projid);
}
if (option_mask32 & OPT_GENERATION) {
unsigned generation;
r = ioctl(fd, EXT2_IOC_GETVERSION, &generation);
if (r != 0)
goto read_err;
printf("%-10u ", generation);
}
r = ioctl(fd, EXT2_IOC_GETFLAGS, &fsflags);
if (r != 0)
goto read_err;
close(fd);
if (option_mask32 & OPT_PF_LONG) {
printf("%-28s ", name);
print_e2flags_long(fsflags);
bb_putchar('\n');
} else {
print_e2flags(fsflags);
printf(" %s\n", name);
}
return;
read_err:
bb_perror_msg("reading %s", name);
close(fd);
}
static int FAST_FUNC lsattr_dir_proc(const char *dir_name,
struct dirent *de,
void *private UNUSED_PARAM)
{
struct stat st;
char *path;
path = concat_path_file(dir_name, de->d_name);
if (lstat(path, &st) != 0)
bb_perror_msg("can't stat '%s'", path);
else if (de->d_name[0] != '.' || (option_mask32 & OPT_ALL)) {
/* Don't try to open device files, fifos etc */
if (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode) || S_ISDIR(st.st_mode))
list_attributes(path);
if (S_ISDIR(st.st_mode) && (option_mask32 & OPT_RECUR)
&& !DOT_OR_DOTDOT(de->d_name)
) {
printf("\n%s:\n", path);
iterate_on_dir(path, lsattr_dir_proc, NULL);
bb_putchar('\n');
}
}
free(path);
return 0;
}
static void lsattr_args(const char *name)
{
struct stat st;
if (lstat(name, &st) == -1) {
bb_perror_msg("can't stat '%s'", name);
} else if (S_ISDIR(st.st_mode) && !(option_mask32 & OPT_DIRS_OPT)) {
iterate_on_dir(name, lsattr_dir_proc, NULL);
} else {
list_attributes(name);
}
}
int lsattr_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int lsattr_main(int argc UNUSED_PARAM, char **argv)
{
getopt32(argv, "Radlvp");
argv += optind;
if (!*argv)
*--argv = (char*)".";
do lsattr_args(*argv++); while (*argv);
return EXIT_SUCCESS;
}
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