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ls.c revision 1.11 
      1 /*	$NetBSD: ls.c,v 1.11 2001/12/22 00:35:45 wiz 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. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 #include <sys/cdefs.h>
     37 #ifndef lint
     38 __COPYRIGHT("@(#) Copyright (c) 1993\n\
     39 	The Regents of the University of California.  All rights reserved.\n");
     40 #endif /* not lint */
     41 
     42 #ifndef lint
     43 #if 0
     44 static char sccsid[] = "@(#)ls.c	8.1 (Berkeley) 6/11/93";
     45 #else
     46 __RCSID("$NetBSD: ls.c,v 1.11 2001/12/22 00:35:45 wiz Exp $");
     47 #endif
     48 #endif /* not lint */
     49 
     50 #include <sys/param.h>
     51 #include <sys/stat.h>
     52 #include <sys/dirent.h>
     53 #include <ufs/ufs/dir.h>
     54 #include <ufs/ufs/dinode.h>
     55 #include <sys/ttychars.h>
     56 #include <lib/libsa/stand.h>
     57 
     58 int main __P((void));
     59 static void ls __P((int));
     60 
     61 int
     62 main()
     63 {
     64 	struct stat st;
     65 	int fd;
     66 
     67 	for (;;) {
     68 		if ((fd = getfile("ls", 0)) == -1)
     69 			exit();
     70 
     71 		if (fstat(fd, &st) == -1) {
     72 			printf("ls: cannot stat\n");
     73 			continue;
     74 		}
     75 
     76 		if (!S_ISDIR(st.st_mode)) {
     77 			printf("ls: not a directory\n");
     78 			continue;
     79 		}
     80 		if (st.st_size == 0) {
     81 			printf("ls: zero length directory\n");
     82 			continue;
     83 		}
     84 		ls(fd);
     85 	}
     86 }
     87 
     88 typedef struct dirent	DP;
     89 static void
     90 ls(fd)
     91 	register int fd;
     92 {
     93 	register int size;
     94 	register char *dp;
     95 	char dirbuf[DIRBLKSIZ];
     96 
     97 	printf("\ninode\tname\n");
     98 	while ((size = read(fd, dirbuf, DIRBLKSIZ)) == DIRBLKSIZ)
     99 		for (dp = dirbuf; (dp < (dirbuf + size)) &&
    100 		    (dp + ((DP *)dp)->d_reclen) < (dirbuf + size);
    101 		    dp += ((DP *)dp)->d_reclen) {
    102 			if (((DP *)dp)->d_fileno == 0)
    103 				continue;
    104 			if (((DP *)dp)->d_namlen > MAXNAMLEN+1) {
    105 				printf("Corrupt file name length!  Run fsck soon!\n");
    106 				return;
    107 			}
    108 			printf("%d\t%s\n", ((DP *)dp)->d_fileno,
    109 			    ((DP *)dp)->d_name);
    110 		}
    111 }
    112