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Annotation of 43BSDTahoe/sys/stand/ls.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1982, 1986, 1988 Regents of the University of California.
                      3:  * All rights reserved.
                      4:  *
                      5:  * Redistribution and use in source and binary forms are permitted
                      6:  * provided that the above copyright notice and this paragraph are
                      7:  * duplicated in all such forms and that any documentation,
                      8:  * advertising materials, and other materials related to such
                      9:  * distribution and use acknowledge that the software was developed
                     10:  * by the University of California, Berkeley.  The name of the
                     11:  * University may not be used to endorse or promote products derived
                     12:  * from this software without specific prior written permission.
                     13:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
                     14:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
                     15:  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     16:  *
                     17:  *     @(#)ls.c        7.5 (Berkeley) 3/21/89
                     18:  */
                     19: 
                     20: #include "param.h"
                     21: #include "inode.h"
                     22: #include "dir.h"
                     23: #include "fs.h"
                     24: #include "saio.h"
                     25: #include "ttychars.h"
                     26: 
                     27: main()
                     28: {
                     29:        struct inode *ip;
                     30:        int fd;
                     31: 
                     32:        for (;;) {
                     33:                if ((fd = getfile("ls", 0)) == -1)
                     34:                        exit();
                     35:                ip = &iob[fd - 3].i_ino;
                     36:                if ((ip->i_mode & IFMT) != IFDIR) {
                     37:                        printf("ls: not a directory\n");
                     38:                        continue;
                     39:                }
                     40:                if (ip->i_size == 0) {
                     41:                        printf("ls: zero length directory\n");
                     42:                        continue;
                     43:                }
                     44:                ls(fd);
                     45:        }
                     46: }
                     47: 
                     48: getfile(prompt, mode)
                     49:        char *prompt;
                     50:        int mode;
                     51: {
                     52:        int fd;
                     53:        char buf[100];
                     54: 
                     55:        do {
                     56:                printf("%s: ", prompt);
                     57:                gets(buf);
                     58:                if (buf[0] == CTRL('d') && buf[1] == 0)
                     59:                        return (-1);
                     60:        } while ((fd = open(buf, mode)) <= 0);
                     61:        return(fd);
                     62: }
                     63: 
                     64: typedef struct direct  DP;
                     65: static
                     66: ls(fd)
                     67:        register int fd;
                     68: {
                     69:        register int size;
                     70:        register char *dp;
                     71:        char dirbuf[DIRBLKSIZ];
                     72: 
                     73:        printf("\ninode\tname\n");
                     74:        while ((size = read(fd, dirbuf, DIRBLKSIZ)) == DIRBLKSIZ)
                     75:                for(dp = dirbuf; (dp < (dirbuf + size)) &&
                     76:                    (dp + ((DP *)dp)->d_reclen) < (dirbuf + size);
                     77:                    dp += ((DP *)dp)->d_reclen) {
                     78:                        if (((DP *)dp)->d_ino == 0)
                     79:                                continue;
                     80:                        if (((DP *)dp)->d_namlen > MAXNAMLEN+1) {
                     81:                                printf("Corrupt file name length!  Run fsck soon!\n");
                     82:                                return;
                     83:                        }
                     84:                        printf("%d\t%s\n", ((DP *)dp)->d_ino,
                     85:                            ((DP *)dp)->d_name);
                     86:                }
                     87: }

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