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