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ls.c revision 1.16 
      1 /*	$NetBSD: ls.c,v 1.16 2009/03/18 10:22:45 cegger 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 1.16 2009/03/18 10:22:45 cegger 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 }
    107