FreeBSD/Linux Kernel Cross Reference
sys/stand/ls.c
1 /* $NetBSD: ls.c,v 1.12 2003/08/07 16:33:59 agc Exp $ */
2
3 /*-
4 * Copyright (c) 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 #ifndef lint
34 __COPYRIGHT("@(#) Copyright (c) 1993\n\
35 The Regents of the University of California. All rights reserved.\n");
36 #endif /* not lint */
37
38 #ifndef lint
39 #if 0
40 static char sccsid[] = "@(#)ls.c 8.1 (Berkeley) 6/11/93";
41 #else
42 __RCSID("$NetBSD: ls.c,v 1.12 2003/08/07 16:33:59 agc Exp $");
43 #endif
44 #endif /* not lint */
45
46 #include <sys/param.h>
47 #include <sys/stat.h>
48 #include <sys/dirent.h>
49 #include <ufs/ufs/dir.h>
50 #include <ufs/ufs/dinode.h>
51 #include <sys/ttychars.h>
52 #include <lib/libsa/stand.h>
53
54 int main __P((void));
55 static void ls __P((int));
56
57 int
58 main()
59 {
60 struct stat st;
61 int fd;
62
63 for (;;) {
64 if ((fd = getfile("ls", 0)) == -1)
65 exit();
66
67 if (fstat(fd, &st) == -1) {
68 printf("ls: cannot stat\n");
69 continue;
70 }
71
72 if (!S_ISDIR(st.st_mode)) {
73 printf("ls: not a directory\n");
74 continue;
75 }
76 if (st.st_size == 0) {
77 printf("ls: zero length directory\n");
78 continue;
79 }
80 ls(fd);
81 }
82 }
83
84 typedef struct dirent DP;
85 static void
86 ls(fd)
87 register int fd;
88 {
89 register int size;
90 register char *dp;
91 char dirbuf[DIRBLKSIZ];
92
93 printf("\ninode\tname\n");
94 while ((size = read(fd, dirbuf, DIRBLKSIZ)) == DIRBLKSIZ)
95 for (dp = dirbuf; (dp < (dirbuf + size)) &&
96 (dp + ((DP *)dp)->d_reclen) < (dirbuf + size);
97 dp += ((DP *)dp)->d_reclen) {
98 if (((DP *)dp)->d_fileno == 0)
99 continue;
100 if (((DP *)dp)->d_namlen > MAXNAMLEN+1) {
101 printf("Corrupt file name length! Run fsck soon!\n");
102 return;
103 }
104 printf("%d\t%s\n", ((DP *)dp)->d_fileno,
105 ((DP *)dp)->d_name);
106 }
107 }
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