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Annotation of 43BSDReno/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 is only permitted until one year after the first shipment
        !             6:  * of 4.4BSD by the Regents.  Otherwise, redistribution and use in source and
        !             7:  * binary forms are permitted provided that: (1) source distributions retain
        !             8:  * this entire copyright notice and comment, and (2) distributions including
        !             9:  * binaries display the following acknowledgement:  This product includes
        !            10:  * software developed by the University of California, Berkeley and its
        !            11:  * contributors'' in the documentation or other materials provided with the
        !            12:  * distribution and in all advertising materials mentioning features or use
        !            13:  * of this software.  Neither the name of the University nor the names of
        !            14:  * its contributors may be used to endorse or promote products derived from
        !            15:  * this software without specific prior written permission.
        !            16:  * THIS SOFTWARE IS PROVIDED AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
        !            17:  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
        !            18:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            19:  *
        !            20:  *     @(#)ls.c        7.9 (Berkeley) 6/28/90
        !            21:  */
        !            22: 
        !            23: #include "sys/param.h"
        !            24: #include "ufs/dir.h"
        !            25: #include "saio.h"
        !            26: #include "sys/ttychars.h"
        !            27: 
        !            28: main()
        !            29: {
        !            30:        struct dinode *ip;
        !            31:        int fd;
        !            32: 
        !            33:        for (;;) {
        !            34:                if ((fd = getfile("ls", 0)) == -1)
        !            35:                        exit();
        !            36:                ip = &iob[fd - 3].i_ino;
        !            37:                if ((ip->di_mode & IFMT) != IFDIR) {
        !            38:                        printf("ls: not a directory\n");
        !            39:                        continue;
        !            40:                }
        !            41:                if (ip->di_size == 0) {
        !            42:                        printf("ls: zero length directory\n");
        !            43:                        continue;
        !            44:                }
        !            45:                ls(fd);
        !            46:        }
        !            47: }
        !            48: 
        !            49: #define CTRL(x)        (x&037)
        !            50: 
        !            51: getfile(prompt, mode)
        !            52:        char *prompt;
        !            53:        int mode;
        !            54: {
        !            55:        int fd;
        !            56:        char buf[100];
        !            57: 
        !            58:        do {
        !            59:                printf("%s: ", prompt);
        !            60:                gets(buf);
        !            61:                if (buf[0] == CTRL('d') && buf[1] == 0)
        !            62:                        return (-1);
        !            63:        } while ((fd = open(buf, mode)) <= 0);
        !            64:        return(fd);
        !            65: }
        !            66: 
        !            67: typedef struct direct  DP;
        !            68: static
        !            69: ls(fd)
        !            70:        register int fd;
        !            71: {
        !            72:        register int size;
        !            73:        register char *dp;
        !            74:        char dirbuf[DIRBLKSIZ];
        !            75: 
        !            76:        printf("\ninode\tname\n");
        !            77:        while ((size = read(fd, dirbuf, DIRBLKSIZ)) == DIRBLKSIZ)
        !            78:                for(dp = dirbuf; (dp < (dirbuf + size)) &&
        !            79:                    (dp + ((DP *)dp)->d_reclen) < (dirbuf + size);
        !            80:                    dp += ((DP *)dp)->d_reclen) {
        !            81:                        if (((DP *)dp)->d_ino == 0)
        !            82:                                continue;
        !            83:                        if (((DP *)dp)->d_namlen > MAXNAMLEN+1) {
        !            84:                                printf("Corrupt file name length!  Run fsck soon!\n");
        !            85:                                return;
        !            86:                        }
        !            87:                        printf("%d\t%s\n", ((DP *)dp)->d_ino,
        !            88:                            ((DP *)dp)->d_name);
        !            89:                }
        !            90: }

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