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/param.h>
41#include <ufs/ufs/dinode.h>
42#include <ufs/ufs/dir.h>
43
44#include <stand.h>
45#include <string.h>
46
47#include "bootstrap.h"
48
49static char typestr[] = "?fc?d?b? ?l?s?w";
50
51static int	ls_getdir(char **pathp);
52
53COMMAND_SET(ls, "ls", "list files", command_ls);
54
55static int
56command_ls(int argc, char *argv[])
57{
58    int		fd;
59    struct stat	sb;
60    struct	dirent *d;
61    char	*buf, *path;
62    char	lbuf[128];		/* one line */
63    int		result, ch;
64    int		verbose;
65
66    result = CMD_OK;
67    fd = -1;
68    verbose = 0;
69    optind = 1;
70    optreset = 1;
71    while ((ch = getopt(argc, argv, "l")) != -1) {
72	switch (ch) {
73	case 'l':
74	    verbose = 1;
75	    break;
76	case '?':
77	default:
78	    /* getopt has already reported an error */
79	    return (CMD_OK);
80	}
81    }
82    argv += (optind - 1);
83    argc -= (optind - 1);
84
85    if (argc < 2) {
86	path = "";
87    } else {
88	path = argv[1];
89    }
90
91    if (stat(path, &sb) == 0 && !S_ISDIR(sb.st_mode)) {
92	if (verbose) {
93	    printf(" %c %8d %s\n",
94		typestr[sb.st_mode >> 12],
95		(int)sb.st_size, path);
96	} else {
97	    printf(" %c  %s\n",
98		typestr[sb.st_mode >> 12], path);
99	}
100	return (CMD_OK);
101    }
102
103    fd = ls_getdir(&path);
104    if (fd == -1) {
105	result = CMD_ERROR;
106	goto out;
107    }
108    pager_open();
109    pager_output(path);
110    pager_output("\n");
111
112    while ((d = readdirfd(fd)) != NULL) {
113	if (strcmp(d->d_name, ".") && strcmp(d->d_name, "..")) {
114	    if (d->d_type == 0 || verbose) {
115		/* stat the file, if possible */
116		sb.st_size = 0;
117		sb.st_mode = 0;
118		buf = malloc(strlen(path) + strlen(d->d_name) + 2);
119		if (buf != NULL) {
120		    sprintf(buf, "%s/%s", path, d->d_name);
121		    /* ignore return, could be symlink, etc. */
122		    if (stat(buf, &sb)) {
123			sb.st_size = 0;
124			sb.st_mode = 0;
125		    }
126		    free(buf);
127		}
128	    }
129	    if (verbose) {
130		snprintf(lbuf, sizeof(lbuf), " %c %8d %s\n",
131		    typestr[d->d_type? d->d_type:sb.st_mode >> 12],
132		    (int)sb.st_size, d->d_name);
133	    } else {
134		snprintf(lbuf, sizeof(lbuf), " %c  %s\n",
135		    typestr[d->d_type? d->d_type:sb.st_mode >> 12], d->d_name);
136	    }
137	    if (pager_output(lbuf))
138		goto out;
139	}
140    }
141 out:
142    pager_close();
143    if (fd != -1)
144	close(fd);
145    free(path);		/* ls_getdir() did allocate path */
146    return (result);
147}
148
149/*
150 * Given (path) containing a vaguely reasonable path specification, return an fd
151 * on the directory, and an allocated copy of the path to the directory.
152 */
153static int
154ls_getdir(char **pathp)
155{
156    struct stat	sb;
157    int		fd;
158    const char	*cp;
159    char	*path;
160
161    fd = -1;
162
163    /* one extra byte for a possible trailing slash required */
164    path = malloc(strlen(*pathp) + 2);
165    if (path == NULL) {
166	snprintf(command_errbuf, sizeof (command_errbuf),
167	    "out of memory");
168	goto out;
169    }
170    strcpy(path, *pathp);
171
172    /* Make sure the path is respectable to begin with */
173    if (archsw.arch_getdev(NULL, path, &cp)) {
174	snprintf(command_errbuf, sizeof(command_errbuf),
175	    "bad path '%s'", path);
176	goto out;
177    }
178
179    /* If there's no path on the device, assume '/' */
180    if (*cp == 0)
181	strcat(path, "/");
182
183    fd = open(path, O_RDONLY);
184    if (fd < 0) {
185	snprintf(command_errbuf, sizeof(command_errbuf),
186	    "open '%s' failed: %s", path, strerror(errno));
187	goto out;
188    }
189    if (fstat(fd, &sb) < 0) {
190	snprintf(command_errbuf, sizeof(command_errbuf),
191	    "stat failed: %s", strerror(errno));
192	goto out;
193    }
194    if (!S_ISDIR(sb.st_mode)) {
195	snprintf(command_errbuf, sizeof(command_errbuf),
196	    "%s: %s", path, strerror(ENOTDIR));
197	goto out;
198    }
199
200    *pathp = path;
201    return (fd);
202
203 out:
204    free(path);
205    *pathp = NULL;
206    if (fd != -1)
207	close(fd);
208    return (-1);
209}
210