busybox/e2fsprogs/lsattr.c

/*
 * 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
 */

/*
 * 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	- Display version info only when -V specified (G M Sipe)
 */

#include <sys/types.h>
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <sys/param.h>
#include <sys/stat.h>

#include <ext2fs/ext2_fs.h>
#include "e2fsbb.h"
#include "e2p/e2p.h"

#ifdef __GNUC__
#define EXT2FS_ATTR(x) __attribute__(x)
#else
#define EXT2FS_ATTR(x)
#endif

#define OPT_RECUR 1
#define OPT_ALL 2
#define OPT_DIRS_OPT 4
#define OPT_PF_LONG 8
#define OPT_GENERATION 16
static int flags;

#ifdef CONFIG_LFS
# define LSTAT lstat64
# define STRUCT_STAT struct stat64
#else
# define LSTAT lstat
# define STRUCT_STAT struct stat
#endif

static void list_attributes(const char *name)
{
	unsigned long fsflags;
	unsigned long generation;

	if (fgetflags(name, &fsflags) == -1) {
		bb_perror_msg("While reading flags on %s", name);
		return;
	}
	if (flags & OPT_GENERATION) {
		if (fgetversion(name, &generation) == -1) {
			bb_perror_msg("While reading version on %s", name);
			return;
		}
		printf("%5lu ", generation);
	}
	if (flags & OPT_PF_LONG) {
		printf("%-28s ", name);
		print_flags(stdout, fsflags, PFOPT_LONG);
		fputc('\n', stdout);
	} else {
		print_flags(stdout, fsflags, 0);
		printf(" %s\n", name);
	}
}

static int lsattr_dir_proc(const char *, struct dirent *, void *);

static void lsattr_args(const char *name)
{
	STRUCT_STAT	st;

	if (LSTAT(name, &st) == -1)
		bb_perror_msg("while trying to stat %s", name);
	else {
		if (S_ISDIR(st.st_mode) && !(flags & OPT_DIRS_OPT))
			iterate_on_dir(name, lsattr_dir_proc, NULL);
		else
			list_attributes(name);
	}
}

static int lsattr_dir_proc(const char *dir_name, struct dirent *de, 
                           void *private EXT2FS_ATTR((unused)))
{
	STRUCT_STAT	st;
	char *path;
	int i = strlen(dir_name);

	if (i && dir_name[i-1] == '/')
		i = asprintf(&path, "%s%s", dir_name, de->d_name);
	else
		i = asprintf(&path, "%s/%s", dir_name, de->d_name);
	if (i == -1)
		bb_error_msg_and_die(bb_msg_memory_exhausted);

	if (LSTAT(path, &st) == -1)
		bb_perror_msg(path);
	else {
		if (de->d_name[0] != '.' || (flags & OPT_ALL)) {
			list_attributes(path);
			if (S_ISDIR(st.st_mode) && (flags & OPT_RECUR) &&
			    strcmp(de->d_name, ".") && strcmp(de->d_name, "..")) {
				printf("\n%s:\n", path);
				iterate_on_dir(path, lsattr_dir_proc, NULL);
				printf("\n");
			}
		}
	}

	free(path);

	return 0;
}

int lsattr_main(int argc, char **argv)
{
	int i;

	flags = bb_getopt_ulflags(argc, argv, "Radlv");

	if (optind > argc - 1)
		lsattr_args(".");
	else
		for (i = optind; i < argc; i++)
			lsattr_args(argv[i]);

	return EXIT_SUCCESS;
}