ls.c revision 50477 
1/*
2 * $FreeBSD: head/sys/boot/common/ls.c 50477 1999-08-28 01:08:13Z peter $
3 * From: $NetBSD: ls.c,v 1.3 1997/06/13 13:48:47 drochner Exp $
4 */
5
6/*
7 * Copyright (c) 1993
8 *	The Regents of the University of California.  All rights reserved.
9 * Copyright (c) 1996
10 *	Matthias Drochner.  All rights reserved.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 *    notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 *    notice, this list of conditions and the following disclaimer in the
19 *    documentation and/or other materials provided with the distribution.
20 * 3. All advertising materials mentioning features or use of this software
21 *    must display the following acknowledgement:
22 *	This product includes software developed by the University of
23 *	California, Berkeley and its contributors.
24 * 4. Neither the name of the University nor the names of its contributors
25 *    may be used to endorse or promote products derived from this software
26 *    without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * SUCH DAMAGE.
39 */
40
41
42#include <sys/param.h>
43#include <ufs/ufs/dinode.h>
44#include <ufs/ufs/dir.h>
45
46#include <stand.h>
47#include <string.h>
48
49#include "bootstrap.h"
50
51static char typestr[] = "?fc?d?b? ?l?s?w";
52
53static int	ls_getdir(char **pathp);
54
55COMMAND_SET(ls, "ls", "list files", command_ls);
56
57static int
58command_ls(int argc, char *argv[])
59{
60    int		fd;
61    size_t	size;
62    struct stat	sb;
63    static char	dirbuf[DIRBLKSIZ];
64    char	*buf, *path;
65    char	lbuf[128];		/* one line */
66    int		result, ch;
67    int		verbose;
68
69    result = CMD_OK;
70    fd = -1;
71    verbose = 0;
72    optind = 1;
73    optreset = 1;
74    while ((ch = getopt(argc, argv, "l")) != -1) {
75	switch(ch) {
76	case 'l':
77	    verbose = 1;
78	    break;
79	case '?':
80	default:
81	    /* getopt has already reported an error */
82	    return(CMD_OK);
83	}
84    }
85    argv += (optind - 1);
86    argc -= (optind - 1);
87
88    if (argc < 2) {
89	path = "";
90    } else {
91	path = argv[1];
92    }
93
94    fd = ls_getdir(&path);
95    if (fd == -1) {
96	result = CMD_ERROR;
97	goto out;
98    }
99    pager_open();
100    pager_output(path);
101    pager_output("\n");
102
103
104    while ((size = read(fd, dirbuf, DIRBLKSIZ)) == DIRBLKSIZ) {
105	struct direct  *dp, *edp;
106
107	dp = (struct direct *) dirbuf;
108	edp = (struct direct *) (dirbuf + size);
109
110	while (dp < edp) {
111	    if (dp->d_ino != (ino_t) 0) {
112
113		if ((dp->d_namlen > MAXNAMLEN + 1) || (dp->d_type > sizeof(typestr))) {
114		    /*
115		     * This does not handle "old"
116		     * filesystems properly. On little
117		     * endian machines, we get a bogus
118		     * type name if the namlen matches a
119		     * valid type identifier. We could
120		     * check if we read namlen "0" and
121		     * handle this case specially, if
122		     * there were a pressing need...
123		     */
124		    command_errmsg = "bad dir entry";
125		    result = CMD_ERROR;
126		    goto out;
127		}
128
129		if (strcmp(dp->d_name, ".") && strcmp(dp->d_name, "..")) {
130		    if (verbose) {
131			/* stat the file, if possible */
132			sb.st_size = 0;
133			buf = malloc(strlen(path) + strlen(dp->d_name) + 2);
134			sprintf(buf, "%s/%s", path, dp->d_name);
135			/* ignore return, could be symlink, etc. */
136			if (stat(buf, &sb))
137			    sb.st_size = 0;
138			free(buf);
139			sprintf(lbuf, " %c %8d %s\n", typestr[dp->d_type], (int)sb.st_size, dp->d_name);
140		    } else
141			sprintf(lbuf, " %c  %s\n", typestr[dp->d_type], dp->d_name);
142		    if (pager_output(lbuf))
143			goto out;
144		}
145	    }
146	    dp = (struct direct *) ((char *) dp + dp->d_reclen);
147	}
148    }
149 out:
150    pager_close();
151    if (fd != -1)
152	close(fd);
153    if (path != NULL)
154	free(path);
155    return(result);
156}
157
158/*
159 * Given (path) containing a vaguely reasonable path specification, return an fd
160 * on the directory, and an allocated copy of the path to the directory.
161 */
162static int
163ls_getdir(char **pathp)
164{
165    struct stat	sb;
166    int		fd;
167    const char	*cp;
168    char	*path, *tail;
169
170    tail = NULL;
171    fd = -1;
172
173    /* one extra byte for a possible trailing slash required */
174    path = malloc(strlen(*pathp) + 2);
175    strcpy(path, *pathp);
176
177    /* Make sure the path is respectable to begin with */
178    if (archsw.arch_getdev(NULL, path, &cp)) {
179	sprintf(command_errbuf, "bad path '%s'", path);
180	goto out;
181    }
182
183    /* If there's no path on the device, assume '/' */
184    if (*cp == 0)
185	strcat(path, "/");
186
187    fd = open(path, O_RDONLY);
188    if (fd < 0) {
189	sprintf(command_errbuf, "open '%s' failed: %s", path, strerror(errno));
190	goto out;
191    }
192    if (fstat(fd, &sb) < 0) {
193	sprintf(command_errbuf, "stat failed: %s", strerror(errno));
194	goto out;
195    }
196    if (!S_ISDIR(sb.st_mode)) {
197	sprintf(command_errbuf, "%s: %s", path, strerror(ENOTDIR));
198	goto out;
199    }
200
201    *pathp = path;
202    return(fd);
203
204 out:
205    free(path);
206    *pathp = NULL;
207    if (fd != -1)
208	close(fd);
209    return(-1);
210}
211