ls.c revision 65f0aab98b20b5994a726ab90d355248bcddfffd 
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
25#include "debugfs.h"
26
27/*
28 * list directory
29 */
30
31#define LONG_OPT	0x0001
32#define DELETED_OPT	0x0002
33#define PARSE_OPT	0x0004
34
35struct list_dir_struct {
36	FILE	*f;
37	int	col;
38	int	options;
39};
40
41static const char *monstr[] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun",
42				"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
43
44static int list_dir_proc(ext2_ino_t dir EXT2FS_ATTR((unused)),
45			 int	entry,
46			 struct ext2_dir_entry *dirent,
47			 int	offset EXT2FS_ATTR((unused)),
48			 int	blocksize EXT2FS_ATTR((unused)),
49			 char	*buf EXT2FS_ATTR((unused)),
50			 void	*private)
51{
52	struct ext2_inode	inode;
53	ext2_ino_t		ino;
54	struct tm		*tm_p;
55	time_t			modtime;
56	char			name[EXT2_NAME_LEN + 1];
57	char			tmp[EXT2_NAME_LEN + 16];
58	char			datestr[80];
59	char			lbr, rbr;
60	int			thislen;
61	struct list_dir_struct *ls = (struct list_dir_struct *) private;
62
63	thislen = ((dirent->name_len & 0xFF) < EXT2_NAME_LEN) ?
64		(dirent->name_len & 0xFF) : EXT2_NAME_LEN;
65	strncpy(name, dirent->name, thislen);
66	name[thislen] = '\0';
67	ino = dirent->inode;
68
69	if (entry == DIRENT_DELETED_FILE) {
70		lbr = '<';
71		rbr = '>';
72		ino = 0;
73	} else {
74		lbr = rbr = ' ';
75	}
76	if (ls->options & PARSE_OPT) {
77		if (ino && debugfs_read_inode(ino, &inode, name)) return 0;
78		fprintf(ls->f,"/%u/%06o/%d/%d/%s/",ino,inode.i_mode,inode.i_uid, inode.i_gid,name);
79		if (LINUX_S_ISDIR(inode.i_mode))
80			fprintf(ls->f, "/");
81		else
82			fprintf(ls->f, "%lld/", inode.i_size | ((__u64)inode.i_size_high << 32));
83		fprintf(ls->f, "\n");
84	}
85	else if (ls->options & LONG_OPT) {
86		if (ino) {
87			if (debugfs_read_inode(ino, &inode, name))
88				return 0;
89			modtime = inode.i_mtime;
90			tm_p = localtime(&modtime);
91			sprintf(datestr, "%2d-%s-%4d %02d:%02d",
92				tm_p->tm_mday, monstr[tm_p->tm_mon],
93				1900 + tm_p->tm_year, tm_p->tm_hour,
94				tm_p->tm_min);
95		} else {
96			strcpy(datestr, "                 ");
97			memset(&inode, 0, sizeof(struct ext2_inode));
98		}
99		fprintf(ls->f, "%c%6u%c %6o (%d)  %5d  %5d   ", lbr, ino, rbr,
100			inode.i_mode, dirent->name_len >> 8,
101			inode_uid(inode), inode_gid(inode));
102		if (LINUX_S_ISDIR(inode.i_mode))
103			fprintf(ls->f, "%5d", inode.i_size);
104		else
105			fprintf(ls->f, "%5llu", inode.i_size |
106				((unsigned long long) inode.i_size_high << 32));
107		fprintf (ls->f, " %s %s\n", datestr, name);
108	} else {
109		sprintf(tmp, "%c%u%c (%d) %s   ", lbr, dirent->inode, rbr,
110			dirent->rec_len, name);
111		thislen = strlen(tmp);
112
113		if (ls->col + thislen > 80) {
114			fprintf(ls->f, "\n");
115			ls->col = 0;
116		}
117		fprintf(ls->f, "%s", tmp);
118		ls->col += thislen;
119	}
120	return 0;
121}
122
123void do_list_dir(int argc, char *argv[])
124{
125	ext2_ino_t	inode;
126	int		retval;
127	int		c;
128	int		flags;
129	struct list_dir_struct ls;
130
131	ls.options = 0;
132	if (check_fs_open(argv[0]))
133		return;
134
135	reset_getopt();
136	while ((c = getopt (argc, argv, "dlp")) != EOF) {
137		switch (c) {
138		case 'l':
139			ls.options |= LONG_OPT;
140			break;
141		case 'd':
142			ls.options |= DELETED_OPT;
143			break;
144		case 'p':
145			ls.options |= PARSE_OPT;
146			break;
147		default:
148			goto print_usage;
149		}
150	}
151
152	if (argc > optind+1) {
153	print_usage:
154		com_err(0, 0, "Usage: ls [-l] [-d] [-p] file");
155		return;
156	}
157
158	if (argc == optind)
159		inode = cwd;
160	else
161		inode = string_to_inode(argv[optind]);
162	if (!inode)
163		return;
164
165	ls.f = open_pager();
166	ls.col = 0;
167	flags = DIRENT_FLAG_INCLUDE_EMPTY;
168	if (ls.options & DELETED_OPT)
169		flags |= DIRENT_FLAG_INCLUDE_REMOVED;
170
171	retval = ext2fs_dir_iterate2(current_fs, inode, flags,
172				    0, list_dir_proc, &ls);
173	fprintf(ls.f, "\n");
174	close_pager(ls.f);
175	if (retval)
176		com_err(argv[1], retval, 0);
177
178	return;
179}
180
181
182