ls.c revision ed78c021c3b111d8ab9a51aef5d5156e3004083f 
1/*
2 * ls.c --- list directories
3 *
4 * Copyright (C) 1997 Theodore Ts'o.  This file may be redistributed
5 * under the terms of the GNU Public License.
6 */
7
8#include <stdio.h>
9#include <unistd.h>
10#include <stdlib.h>
11#include <ctype.h>
12#include <string.h>
13#include <time.h>
14#ifdef HAVE_ERRNO_H
15#include <errno.h>
16#endif
17#include <sys/types.h>
18#ifdef HAVE_GETOPT_H
19#include <getopt.h>
20#else
21extern int optind;
22extern char *optarg;
23#endif
24#ifdef HAVE_OPTRESET
25extern int optreset;		/* defined by BSD, but not others */
26#endif
27
28#include "debugfs.h"
29
30/*
31 * list directory
32 */
33
34#define LONG_OPT	0x0001
35#define DELETED_OPT	0x0002
36
37struct list_dir_struct {
38	FILE	*f;
39	int	col;
40	int	options;
41};
42
43static const char *monstr[] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun",
44				"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
45
46static int list_dir_proc(ext2_ino_t dir,
47			 int	entry,
48			 struct ext2_dir_entry *dirent,
49			 int	offset,
50			 int	blocksize,
51			 char	*buf,
52			 void	*private)
53{
54	struct ext2_inode	inode;
55	ext2_ino_t		ino;
56	struct tm		*tm_p;
57	time_t			modtime;
58	char			name[EXT2_NAME_LEN];
59	char			tmp[EXT2_NAME_LEN + 16];
60	char			datestr[80];
61	char			lbr, rbr;
62	int			thislen;
63	struct list_dir_struct *ls = (struct list_dir_struct *) private;
64
65	thislen = ((dirent->name_len & 0xFF) < EXT2_NAME_LEN) ?
66		(dirent->name_len & 0xFF) : EXT2_NAME_LEN;
67	strncpy(name, dirent->name, thislen);
68	name[thislen] = '\0';
69	ino = dirent->inode;
70
71	if (entry == DIRENT_DELETED_FILE) {
72		lbr = '<';
73		rbr = '>';
74		ino = 0;
75	} else {
76		lbr = rbr = ' ';
77	}
78	if (ls->options & LONG_OPT) {
79		if (ino) {
80			if (debugfs_read_inode(ino, &inode, name))
81				return 0;
82			modtime = inode.i_mtime;
83			tm_p = localtime(&modtime);
84			sprintf(datestr, "%2d-%s-%4d %02d:%02d",
85				tm_p->tm_mday, monstr[tm_p->tm_mon],
86				1900 + tm_p->tm_year, tm_p->tm_hour,
87				tm_p->tm_min);
88		} else {
89			strcpy(datestr, "                 ");
90			memset(&inode, 0, sizeof(struct ext2_inode));
91		}
92		fprintf(ls->f, "%c%6u%c %6o (%d)  %5d  %5d   ", lbr, ino, rbr,
93			inode.i_mode, dirent->name_len >> 8,
94			inode.i_uid, inode.i_gid);
95		if (LINUX_S_ISDIR(inode.i_mode))
96			fprintf(ls->f, "%5d", inode.i_size);
97		else
98			fprintf(ls->f, "%5lld", inode.i_size |
99				((__u64)inode.i_size_high << 32));
100		fprintf (ls->f, " %s %s\n", datestr, name);
101	} else {
102		sprintf(tmp, "%c%u%c (%d) %s   ", lbr, dirent->inode, rbr,
103			dirent->rec_len, name);
104		thislen = strlen(tmp);
105
106		if (ls->col + thislen > 80) {
107			fprintf(ls->f, "\n");
108			ls->col = 0;
109		}
110		fprintf(ls->f, "%s", tmp);
111		ls->col += thislen;
112	}
113	return 0;
114}
115
116void do_list_dir(int argc, char *argv[])
117{
118	ext2_ino_t	inode;
119	int		retval;
120	int		c;
121	int		flags;
122	struct list_dir_struct ls;
123
124	ls.options = 0;
125	if (check_fs_open(argv[0]))
126		return;
127
128	optind = 1;
129#ifdef HAVE_OPTRESET
130	optreset = 1;		/* Makes BSD getopt happy */
131#endif
132	while ((c = getopt (argc, argv, "dl")) != EOF) {
133		switch (c) {
134		case 'l':
135			ls.options |= LONG_OPT;
136			break;
137		case 'd':
138			ls.options |= DELETED_OPT;
139			break;
140		}
141	}
142
143	if (argc > optind+1) {
144		com_err(0, 0, "Usage: ls [-l] [-d] file");
145		return;
146	}
147
148	if (argc == optind)
149		inode = cwd;
150	else
151		inode = string_to_inode(argv[optind]);
152	if (!inode)
153		return;
154
155	ls.f = open_pager();
156	ls.col = 0;
157	flags = DIRENT_FLAG_INCLUDE_EMPTY;
158	if (ls.options & DELETED_OPT)
159		flags |= DIRENT_FLAG_INCLUDE_REMOVED;
160
161	retval = ext2fs_dir_iterate2(current_fs, inode, flags,
162				    0, list_dir_proc, &ls);
163	fprintf(ls.f, "\n");
164	close_pager(ls.f);
165	if (retval)
166		com_err(argv[1], retval, "");
167
168	return;
169}
170
171
172