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