ls.c revision 39660 
1/*
2 * $Id: ls.c,v 1.2 1998/09/03 02:10:07 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#ifdef VERBOSE_LS
65    int		verbose;
66
67    verbose = 0;
68    optind = 1;
69    while ((ch = getopt(argc, argv, "l")) != -1) {
70	switch(ch) {
71	case 'l':
72	    verbose = 1;
73	    break;
74	case '?':
75	default:
76	    /* getopt has already reported an error */
77	    return(CMD_OK);
78	}
79    }
80    argv += (optind - 1);
81    argc -= (optind - 1);
82#endif
83
84    if (argc < 2) {
85	path = "/";
86    } else {
87	path = argv[1];
88    }
89
90    pager_open();
91    pager_output(path);
92    pager_output("\n");
93
94    fd = open(path, O_RDONLY);
95    if (fd < 0) {
96	sprintf(command_errbuf, "open '%s' failed: %s", path, strerror(errno));
97	return(CMD_ERROR);
98    }
99    result = CMD_OK;
100    if (fstat(fd, &sb) < 0) {
101	sprintf(command_errbuf, "stat failed: %s", strerror(errno));
102	result = CMD_ERROR;
103	goto out;
104    }
105    if (!S_ISDIR(sb.st_mode)) {
106	sprintf(command_errbuf, "%s: %s", path, strerror(ENOTDIR));
107	result = CMD_ERROR;
108	goto out;
109    }
110#ifdef VERBOSE_LS
111    /* fixup path for stat()ing files */
112    if (!strcmp(path, "/"))
113	path = "";
114#endif
115
116    while ((size = read(fd, dirbuf, DIRBLKSIZ)) == DIRBLKSIZ) {
117	struct direct  *dp, *edp;
118
119	dp = (struct direct *) dirbuf;
120	edp = (struct direct *) (dirbuf + size);
121
122	while (dp < edp) {
123	    if (dp->d_ino != (ino_t) 0) {
124
125		if ((dp->d_namlen > MAXNAMLEN + 1) || (dp->d_type > sizeof(typestr))) {
126		    /*
127		     * This does not handle "old"
128		     * filesystems properly. On little
129		     * endian machines, we get a bogus
130		     * type name if the namlen matches a
131		     * valid type identifier. We could
132		     * check if we read namlen "0" and
133		     * handle this case specially, if
134		     * there were a pressing need...
135		     */
136		    command_errmsg = "bad dir entry";
137		    result = CMD_ERROR;
138		    goto out;
139		}
140
141		if (strcmp(dp->d_name, ".") && strcmp(dp->d_name, "..")) {
142#ifdef VERBOSE_LS /* too much UFS activity blows the heap out */
143		    if (verbose) {
144			/* stat the file, if possible */
145			sb.st_size = 0;
146			sprintf(buf, "%s/%s", path, dp->d_name);
147			/* ignore return */
148			if (stat(buf, &sb)) {
149			    printf("stat(%s) failed: %s\n", buf, strerror(errno));
150			    sb.st_size = -1;
151			}
152			sprintf(buf, " %c %8d %s\n", typestr[dp->d_type], (int)sb.st_size, dp->d_name);
153#endif
154		    } else
155			sprintf(buf, " %c  %s\n", typestr[dp->d_type], dp->d_name);
156		    if (pager_output(buf))
157			goto out;
158		}
159	    }
160	    dp = (struct direct *) ((char *) dp + dp->d_reclen);
161	}
162    }
163 out:
164    pager_close();
165    close(fd);
166    return(result);
167}
168