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ls.c revision 1.4 
      1 /*-
      2  * Copyright (c) 1993
      3  *	The Regents of the University of California.  All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  * 3. All advertising materials mentioning features or use of this software
     14  *    must display the following acknowledgement:
     15  *	This product includes software developed by the University of
     16  *	California, Berkeley and its contributors.
     17  * 4. Neither the name of the University nor the names of its contributors
     18  *    may be used to endorse or promote products derived from this software
     19  *    without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  * SUCH DAMAGE.
     32  */
     33 
     34 #ifndef lint
     35 static char copyright[] =
     36 "@(#) Copyright (c) 1993\n\
     37 	The Regents of the University of California.  All rights reserved.\n";
     38 #endif /* not lint */
     39 
     40 #ifndef lint
     41 /*static char sccsid[] = "from: @(#)ls.c	8.1 (Berkeley) 6/11/93";*/
     42 static char rcsid[] = "NetBSD $Id: ls.c,v 1.4 1994/06/27 19:54:48 cgd Exp $";
     43 #endif /* not lint */
     44 
     45 #include <sys/param.h>
     46 #include <ufs/dir.h>
     47 #include <sys/ttychars.h>
     48 #include "stand.h"
     49 
     50 main()
     51 {
     52 	struct dinode *ip;
     53 	int fd;
     54 
     55 	for (;;) {
     56 		if ((fd = getfile("ls", 0)) == -1)
     57 			exit();
     58 		ip = &iob[fd - 3].i_ino;
     59 		if ((ip->di_mode & IFMT) != IFDIR) {
     60 			printf("ls: not a directory\n");
     61 			continue;
     62 		}
     63 		if (ip->di_size == 0) {
     64 			printf("ls: zero length directory\n");
     65 			continue;
     66 		}
     67 		ls(fd);
     68 	}
     69 }
     70 
     71 #define CTRL(x)	(x&037)
     72 
     73 getfile(prompt, mode)
     74 	char *prompt;
     75 	int mode;
     76 {
     77 	int fd;
     78 	char buf[100];
     79 
     80 	do {
     81 		printf("%s: ", prompt);
     82 		gets(buf);
     83 		if (buf[0] == CTRL('d') && buf[1] == 0)
     84 			return (-1);
     85 	} while ((fd = open(buf, mode)) < 0);
     86 	return(fd);
     87 }
     88 
     89 typedef struct direct	DP;
     90 static
     91 ls(fd)
     92 	register int fd;
     93 {
     94 	register int size;
     95 	register char *dp;
     96 	char dirbuf[DIRBLKSIZ];
     97 
     98 	printf("\ninode\tname\n");
     99 	while ((size = read(fd, dirbuf, DIRBLKSIZ)) == DIRBLKSIZ)
    100 		for (dp = dirbuf; (dp < (dirbuf + size)) &&
    101 		    (dp + ((DP *)dp)->d_reclen) < (dirbuf + size);
    102 		    dp += ((DP *)dp)->d_reclen) {
    103 			if (((DP *)dp)->d_ino == 0)
    104 				continue;
    105 			if (((DP *)dp)->d_namlen > MAXNAMLEN+1) {
    106 				printf("Corrupt file name length!  Run fsck soon!\n");
    107 				return;
    108 			}
    109 			printf("%d\t%s\n", ((DP *)dp)->d_ino,
    110 			    ((DP *)dp)->d_name);
    111 		}
    112 }
    113