bug fix to ncheck

[utzoo!decvax!genradbo!linus!smk]

	The following is a bug fix to the 4.1bsd ncheck program.  It
may also apply to other systems.  If you use the -s option of
ncheck, it is supposed to print out special and setuid files.
	However, if there are none in the file system, it instead
prints out normal directories.  The fix does the right thing.  There
may be a simpler bug fix, but this does the job.

*** /usr/src/cmd/ncheck.c	Wed Oct  1 20:58:42 1980
--- ncheck.c	Thu Mar 10 12:22:12 1983
***************
*** 38,43
  daddr_t	bmap();
  long	atol();
  struct htab *lookup();
  
  main(argc, argv)
  char *argv[];

--- 38,44 -----
  daddr_t	bmap();
  long	atol();
  struct htab *lookup();
+ int	file_count;
  
  main(argc, argv)
  char *argv[];
***************
*** 68,73
  
  		case 's':
  			sflg++;
  			continue;
  
  		default:

--- 69,75 -----
  
  		case 's':
  			sflg++;
+ 			file_count = 0;
  			continue;
  
  		default:
***************
*** 143,148
  			return;
  		if ((ip->di_mode&IFMT)==IFBLK || (ip->di_mode&IFMT)==IFCHR
  		  || ip->di_mode&(ISUID|ISGID))
  			ilist[nxfile++] = ino;
  			return;
  	}

--- 145,152 -----
  			return;
  		if ((ip->di_mode&IFMT)==IFBLK || (ip->di_mode&IFMT)==IFCHR
  		  || ip->di_mode&(ISUID|ISGID))
+ 		{
+ 			file_count++;
  			ilist[nxfile++] = ino;
  		}
  			return;
***************
*** 144,149
  		if ((ip->di_mode&IFMT)==IFBLK || (ip->di_mode&IFMT)==IFCHR
  		  || ip->di_mode&(ISUID|ISGID))
  			ilist[nxfile++] = ino;
  			return;
  	}
  	lookup(ino, 1);

--- 148,154 -----
  		{
  			file_count++;
  			ilist[nxfile++] = ino;
+ 		}
  			return;
  	}
  	lookup(ino, 1);
***************
*** 203,209
  	daddr_t d;
  	ino_t kno;
  
! 	if((ip->di_mode&IFMT) != IFDIR)
  		return;
  	l3tol(iaddr, ip->di_addr, NADDR);
  	doff = 0;

--- 208,214 -----
  	daddr_t d;
  	ino_t kno;
  
! 	if(((ip->di_mode&IFMT) != IFDIR) || ((sflg == 1) && (file_count == 0)))
  		return;
  	l3tol(iaddr, ip->di_addr, NADDR);
  	doff = 0;