usr/src/sys/stand/ls.c

/*-
 * Copyright (c) 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * %sccs.include.redist.c%
 */

#ifndef lint
static char copyright[] =
"@(#) Copyright (c) 1993\n\
        The Regents of the University of California.  All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)ls.c        8.1 (Berkeley) %G%";
#endif /* not lint */

#include <sys/param.h>
#include <ufs/ufs/dir.h>
#include <sys/ttychars.h>
#include <stand/stand.h>

main()
{
        struct dinode *ip;
        int fd;

        for (;;) {
                if ((fd = getfile("ls", 0)) == -1)
                        exit();
                ip = &iob[fd - 3].i_ino;
                if ((ip->di_mode & IFMT) != IFDIR) {
                        printf("ls: not a directory\n");
                        continue;
                }
                if (ip->di_size == 0) {
                        printf("ls: zero length directory\n");
                        continue;
                }
                ls(fd);
        }
}

#define CTRL(x) (x&037)

getfile(prompt, mode)
        char *prompt;
        int mode;
{
        int fd;
        char buf[100];

        do {
                printf("%s: ", prompt);
                gets(buf);
                if (buf[0] == CTRL('d') && buf[1] == 0)
                        return (-1);
        } while ((fd = open(buf, mode)) < 0);
        return(fd);
}

typedef struct direct   DP;
static
ls(fd)
        register int fd;
{
        register int size;
        register char *dp;
        char dirbuf[DIRBLKSIZ];

        printf("\ninode\tname\n");
        while ((size = read(fd, dirbuf, DIRBLKSIZ)) == DIRBLKSIZ)
                for (dp = dirbuf; (dp < (dirbuf + size)) &&
                    (dp + ((DP *)dp)->d_reclen) < (dirbuf + size);
                    dp += ((DP *)dp)->d_reclen) {
                        if (((DP *)dp)->d_ino == 0)
                                continue;
                        if (((DP *)dp)->d_namlen > MAXNAMLEN+1) {
                                printf("Corrupt file name length!  Run fsck soon!\n");
                                return;
                        }
                        printf("%d\t%s\n", ((DP *)dp)->d_ino,
                            ((DP *)dp)->d_name);
                }
}