ls.c revision 40015 
1/*
2 * $Id: ls.c,v 1.3 1998/09/26 01:29:13 msmith Exp $
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
48#include "bootstrap.h"
49
50static char typestr[] = "?fc?d?b? ?l?s?w";
51
52COMMAND_SET(ls, "ls", "list files", command_ls);
53
54static int
55command_ls(int argc, char *argv[])
56{
57    int		fd;
58    struct stat	sb;
59    size_t	size;
60    static char	dirbuf[DIRBLKSIZ];
61    static char	buf[128];	/* must be long enough for full pathname */
62    char	*path;
63    int		result, ch;
64    int		verbose;
65
66    verbose = 0;
67    optind = 1;
68    while ((ch = getopt(argc, argv, "l")) != -1) {
69	switch(ch) {
70	case 'l':
71	    verbose = 1;
72	    break;
73	case '?':
74	default:
75	    /* getopt has already reported an error */
76	    return(CMD_OK);
77	}
78    }
79    argv += (optind - 1);
80    argc -= (optind - 1);
81
82    if (argc < 2) {
83	path = "/";
84    } else {
85	path = argv[1];
86    }
87
88    pager_open();
89    pager_output(path);
90    pager_output("\n");
91
92    fd = open(path, O_RDONLY);
93    if (fd < 0) {
94	sprintf(command_errbuf, "open '%s' failed: %s", path, strerror(errno));
95	return(CMD_ERROR);
96    }
97    result = CMD_OK;
98    if (fstat(fd, &sb) < 0) {
99	sprintf(command_errbuf, "stat failed: %s", strerror(errno));
100	result = CMD_ERROR;
101	goto out;
102    }
103    if (!S_ISDIR(sb.st_mode)) {
104	sprintf(command_errbuf, "%s: %s", path, strerror(ENOTDIR));
105	result = CMD_ERROR;
106	goto out;
107    }
108    /* fixup path for stat()ing files */
109    if (!strcmp(path, "/"))
110	path = "";
111
112    while ((size = read(fd, dirbuf, DIRBLKSIZ)) == DIRBLKSIZ) {
113	struct direct  *dp, *edp;
114
115	dp = (struct direct *) dirbuf;
116	edp = (struct direct *) (dirbuf + size);
117
118	while (dp < edp) {
119	    if (dp->d_ino != (ino_t) 0) {
120
121		if ((dp->d_namlen > MAXNAMLEN + 1) || (dp->d_type > sizeof(typestr))) {
122		    /*
123		     * This does not handle "old"
124		     * filesystems properly. On little
125		     * endian machines, we get a bogus
126		     * type name if the namlen matches a
127		     * valid type identifier. We could
128		     * check if we read namlen "0" and
129		     * handle this case specially, if
130		     * there were a pressing need...
131		     */
132		    command_errmsg = "bad dir entry";
133		    result = CMD_ERROR;
134		    goto out;
135		}
136
137		if (strcmp(dp->d_name, ".") && strcmp(dp->d_name, "..")) {
138		    if (verbose) {
139			/* stat the file, if possible */
140			sb.st_size = 0;
141			sprintf(buf, "%s/%s", path, dp->d_name);
142			/* ignore return, could be symlink, etc. */
143			if (stat(buf, &sb))
144			    sb.st_size = 0;
145			sprintf(buf, " %c %8d %s\n", typestr[dp->d_type], (int)sb.st_size, dp->d_name);
146		    } else
147			sprintf(buf, " %c  %s\n", typestr[dp->d_type], dp->d_name);
148		    if (pager_output(buf))
149			goto out;
150		}
151	    }
152	    dp = (struct direct *) ((char *) dp + dp->d_reclen);
153	}
154    }
155 out:
156    pager_close();
157    close(fd);
158    return(result);
159}
160