1/*
2 * $NetBSD: ls.c,v 1.3 1997/06/13 13:48:47 drochner Exp $
3 */
4
5/*-
6 * Copyright (c) 1993
7 *	The Regents of the University of California.  All rights reserved.
8 * Copyright (c) 1996
9 *	Matthias Drochner.  All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 *    must display the following acknowledgement:
21 *	This product includes software developed by the University of
22 *	California, Berkeley and its contributors.
23 * 4. Neither the name of the University nor the names of its contributors
24 *    may be used to endorse or promote products derived from this software
25 *    without specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * SUCH DAMAGE.
38 */
39
40#include <sys/cdefs.h>
41__FBSDID("$FreeBSD$");
42
43#include <sys/param.h>
44#include <ufs/ufs/dinode.h>
45#include <ufs/ufs/dir.h>
46
47#include <stand.h>
48#include <string.h>
49
50#include "bootstrap.h"
51
52static char typestr[] = "?fc?d?b? ?l?s?w";
53
54static int	ls_getdir(char **pathp);
55
56COMMAND_SET(ls, "ls", "list files", command_ls);
57
58static int
59command_ls(int argc, char *argv[])
60{
61    int		fd;
62    struct stat	sb;
63    struct	dirent *d;
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    if (stat(path, &sb) == 0 && !S_ISDIR(sb.st_mode)) {
95	if (verbose) {
96	    printf(" %c %8d %s\n",
97		typestr[sb.st_mode >> 12],
98		(int)sb.st_size, path);
99	} else {
100	    printf(" %c  %s\n",
101		typestr[sb.st_mode >> 12], path);
102	}
103	return (CMD_OK);
104    }
105
106    fd = ls_getdir(&path);
107    if (fd == -1) {
108	result = CMD_ERROR;
109	goto out;
110    }
111    pager_open();
112    pager_output(path);
113    pager_output("\n");
114
115    while ((d = readdirfd(fd)) != NULL) {
116	if (strcmp(d->d_name, ".") && strcmp(d->d_name, "..")) {
117	    if (d->d_type == 0 || verbose) {
118		/* stat the file, if possible */
119		sb.st_size = 0;
120		sb.st_mode = 0;
121		buf = malloc(strlen(path) + strlen(d->d_name) + 2);
122		if (buf != NULL) {
123		    sprintf(buf, "%s/%s", path, d->d_name);
124		    /* ignore return, could be symlink, etc. */
125		    if (stat(buf, &sb)) {
126			sb.st_size = 0;
127			sb.st_mode = 0;
128		    }
129		    free(buf);
130		}
131	    }
132	    if (verbose) {
133		snprintf(lbuf, sizeof(lbuf), " %c %8d %s\n",
134		    typestr[d->d_type? d->d_type:sb.st_mode >> 12],
135		    (int)sb.st_size, d->d_name);
136	    } else {
137		snprintf(lbuf, sizeof(lbuf), " %c  %s\n",
138		    typestr[d->d_type? d->d_type:sb.st_mode >> 12], d->d_name);
139	    }
140	    if (pager_output(lbuf))
141		goto out;
142	}
143    }
144 out:
145    pager_close();
146    if (fd != -1)
147	close(fd);
148    free(path);		/* ls_getdir() did allocate path */
149    return (result);
150}
151
152/*
153 * Given (path) containing a vaguely reasonable path specification, return an fd
154 * on the directory, and an allocated copy of the path to the directory.
155 */
156static int
157ls_getdir(char **pathp)
158{
159    struct stat	sb;
160    int		fd;
161    const char	*cp;
162    char	*path;
163
164    fd = -1;
165
166    /* one extra byte for a possible trailing slash required */
167    path = malloc(strlen(*pathp) + 2);
168    if (path == NULL) {
169	snprintf(command_errbuf, sizeof (command_errbuf),
170	    "out of memory");
171	goto out;
172    }
173    strcpy(path, *pathp);
174
175    /* Make sure the path is respectable to begin with */
176    if (archsw.arch_getdev(NULL, path, &cp)) {
177	snprintf(command_errbuf, sizeof(command_errbuf),
178	    "bad path '%s'", path);
179	goto out;
180    }
181
182    /* If there's no path on the device, assume '/' */
183    if (*cp == 0)
184	strcat(path, "/");
185
186    fd = open(path, O_RDONLY);
187    if (fd < 0) {
188	snprintf(command_errbuf, sizeof(command_errbuf),
189	    "open '%s' failed: %s", path, strerror(errno));
190	goto out;
191    }
192    if (fstat(fd, &sb) < 0) {
193	snprintf(command_errbuf, sizeof(command_errbuf),
194	    "stat failed: %s", strerror(errno));
195	goto out;
196    }
197    if (!S_ISDIR(sb.st_mode)) {
198	snprintf(command_errbuf, sizeof(command_errbuf),
199	    "%s: %s", path, strerror(ENOTDIR));
200	goto out;
201    }
202
203    *pathp = path;
204    return (fd);
205
206 out:
207    free(path);
208    *pathp = NULL;
209    if (fd != -1)
210	close(fd);
211    return (-1);
212}
213