sys/stand/ls.c

   1 /*      $NetBSD: ls.c,v 1.15 2009/03/14 15:36:25 dsl 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 1.15 2009/03/14 15:36:25 dsl 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(void);
  55 static void ls(int);
  56
  57 int
  58 main(void)
  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(register int fd)
  87 {
  88         register int size;
  89         register char *dp;
  90         char dirbuf[DIRBLKSIZ];
  91
  92         printf("\ninode\tname\n");
  93         while ((size = read(fd, dirbuf, DIRBLKSIZ)) == DIRBLKSIZ)
  94                 for (dp = dirbuf; (dp < (dirbuf + size)) &&
  95                     (dp + ((DP *)dp)->d_reclen) < (dirbuf + size);
  96                     dp += ((DP *)dp)->d_reclen) {
  97                         if (((DP *)dp)->d_fileno == 0)
  98                                 continue;
  99                         if (((DP *)dp)->d_namlen > MAXNAMLEN+1) {
 100                                 printf("Corrupt file name length!  Run fsck soon!\n");
 101                                 return;
 102                         }
 103                         printf("%d\t%s\n", ((DP *)dp)->d_fileno,
 104                             ((DP *)dp)->d_name);
 105                 }
 106 }