ls.c revision 59857 
1/*
2 * $FreeBSD: head/sys/boot/common/ls.c 59857 2000-05-01 18:03:15Z 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    struct stat	sb;
62    struct 	dirent *d;
63    char	*buf, *path;
64    char	lbuf[128];		/* one line */
65    int		result, ch;
66    int		verbose;
67
68    result = CMD_OK;
69    fd = -1;
70    verbose = 0;
71    optind = 1;
72    optreset = 1;
73    while ((ch = getopt(argc, argv, "l")) != -1) {
74	switch(ch) {
75	case 'l':
76	    verbose = 1;
77	    break;
78	case '?':
79	default:
80	    /* getopt has already reported an error */
81	    return(CMD_OK);
82	}
83    }
84    argv += (optind - 1);
85    argc -= (optind - 1);
86
87    if (argc < 2) {
88	path = "";
89    } else {
90	path = argv[1];
91    }
92
93    fd = ls_getdir(&path);
94    if (fd == -1) {
95	result = CMD_ERROR;
96	goto out;
97    }
98    pager_open();
99    pager_output(path);
100    pager_output("\n");
101
102    while ((d = readdirfd(fd)) != NULL) {
103	if (strcmp(d->d_name, ".") && strcmp(d->d_name, "..")) {
104	    if (verbose) {
105		/* stat the file, if possible */
106		sb.st_size = 0;
107		buf = malloc(strlen(path) + strlen(d->d_name) + 2);
108		sprintf(buf, "%s/%s", path, d->d_name);
109		/* ignore return, could be symlink, etc. */
110		if (stat(buf, &sb))
111		    sb.st_size = 0;
112		free(buf);
113		sprintf(lbuf, " %c %8d %s\n", typestr[d->d_type],
114		    (int)sb.st_size, d->d_name);
115	    } else {
116		sprintf(lbuf, " %c  %s\n", typestr[d->d_type], d->d_name);
117	    }
118	    if (pager_output(lbuf))
119		goto out;
120	}
121    }
122 out:
123    pager_close();
124    if (fd != -1)
125	close(fd);
126    if (path != NULL)
127	free(path);
128    return(result);
129}
130
131/*
132 * Given (path) containing a vaguely reasonable path specification, return an fd
133 * on the directory, and an allocated copy of the path to the directory.
134 */
135static int
136ls_getdir(char **pathp)
137{
138    struct stat	sb;
139    int		fd;
140    const char	*cp;
141    char	*path, *tail;
142
143    tail = NULL;
144    fd = -1;
145
146    /* one extra byte for a possible trailing slash required */
147    path = malloc(strlen(*pathp) + 2);
148    strcpy(path, *pathp);
149
150    /* Make sure the path is respectable to begin with */
151    if (archsw.arch_getdev(NULL, path, &cp)) {
152	sprintf(command_errbuf, "bad path '%s'", path);
153	goto out;
154    }
155
156    /* If there's no path on the device, assume '/' */
157    if (*cp == 0)
158	strcat(path, "/");
159
160    fd = open(path, O_RDONLY);
161    if (fd < 0) {
162	sprintf(command_errbuf, "open '%s' failed: %s", path, strerror(errno));
163	goto out;
164    }
165    if (fstat(fd, &sb) < 0) {
166	sprintf(command_errbuf, "stat failed: %s", strerror(errno));
167	goto out;
168    }
169    if (!S_ISDIR(sb.st_mode)) {
170	sprintf(command_errbuf, "%s: %s", path, strerror(ENOTDIR));
171	goto out;
172    }
173
174    *pathp = path;
175    return(fd);
176
177 out:
178    free(path);
179    *pathp = NULL;
180    if (fd != -1)
181	close(fd);
182    return(-1);
183}
184