[unix-history] / usr / src / sys / stand.att / ls.c

/*
* Copyright (c) 1982, 1986, 1988 Regents of the University of California.
* All rights reserved.
*
* %sccs.include.redist.c%
*
*      @(#)ls.c        7.11 (Berkeley) %G%
*/

#include <sys/param.h>
#include <sys/ttychars.h>

#include <ufs/ufs/dir.h>
#include <stand.att/saio.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);
               }
}