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Annotation of Net2/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, 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:  *     @(#)ls.c        7.9 (Berkeley) 6/28/90
                     34:  */
                     35: 
                     36: #include "sys/param.h"
                     37: #include "ufs/dir.h"
                     38: #include "saio.h"
                     39: #include "sys/ttychars.h"
                     40: 
                     41: main()
                     42: {
                     43:        struct dinode *ip;
                     44:        int fd;
                     45: 
                     46:        for (;;) {
                     47:                if ((fd = getfile("ls", 0)) == -1)
                     48:                        exit();
                     49:                ip = &iob[fd - 3].i_ino;
                     50:                if ((ip->di_mode & IFMT) != IFDIR) {
                     51:                        printf("ls: not a directory\n");
                     52:                        continue;
                     53:                }
                     54:                if (ip->di_size == 0) {
                     55:                        printf("ls: zero length directory\n");
                     56:                        continue;
                     57:                }
                     58:                ls(fd);
                     59:        }
                     60: }
                     61: 
                     62: #define CTRL(x)        (x&037)
                     63: 
                     64: getfile(prompt, mode)
                     65:        char *prompt;
                     66:        int mode;
                     67: {
                     68:        int fd;
                     69:        char buf[100];
                     70: 
                     71:        do {
                     72:                printf("%s: ", prompt);
                     73:                gets(buf);
                     74:                if (buf[0] == CTRL('d') && buf[1] == 0)
                     75:                        return (-1);
                     76:        } while ((fd = open(buf, mode)) <= 0);
                     77:        return(fd);
                     78: }
                     79: 
                     80: typedef struct direct  DP;
                     81: static
                     82: ls(fd)
                     83:        register int fd;
                     84: {
                     85:        register int size;
                     86:        register char *dp;
                     87:        char dirbuf[DIRBLKSIZ];
                     88: 
                     89:        printf("\ninode\tname\n");
                     90:        while ((size = read(fd, dirbuf, DIRBLKSIZ)) == DIRBLKSIZ)
                     91:                for(dp = dirbuf; (dp < (dirbuf + size)) &&
                     92:                    (dp + ((DP *)dp)->d_reclen) < (dirbuf + size);
                     93:                    dp += ((DP *)dp)->d_reclen) {
                     94:                        if (((DP *)dp)->d_ino == 0)
                     95:                                continue;
                     96:                        if (((DP *)dp)->d_namlen > MAXNAMLEN+1) {
                     97:                                printf("Corrupt file name length!  Run fsck soon!\n");
                     98:                                return;
                     99:                        }
                    100:                        printf("%d\t%s\n", ((DP *)dp)->d_ino,
                    101:                            ((DP *)dp)->d_name);
                    102:                }
                    103: }

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