The author of this software is

/*

 * The author of this software is Eric Grosse.  Copyright (c) 1994 by AT&T.

 * Permission to use, copy, modify, and distribute this software for any

 * purpose without fee is hereby granted, provided that this entire notice

 * is included in all copies of any software which is or includes a copy

 * or modification of this software and in all copies of the supporting

 * documentation for such software.

 * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED

 * WARRANTY.  IN PARTICULAR, NEITHER THE AUTHORS NOR AT&T MAKE ANY

 * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY

 * OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.

 */

#define _POSIX_SOURCE

#include <stdlib.h>

#include <unistd.h>

#include <stdio.h>

#include <string.h>

#include <ctype.h>

#include <errno.h>

#include <limits.h>

extern int Error(char*,...);

char *progname;

void

filechk(char *f)

{

	char *p;

	unsigned char c;

	if(!f || !*f) Error("null filename");

	if(*f=='/') Error("leading slash");

	if(strncmp(f,"../",3)==0) Error("leading ..");

	for(p = strchr(f,'/'); p; p = strchr(p+1,'/'))

		if(p[1]=='.' && p[2]=='.' && (p[3]==0 || p[3]=='/') )

			Error("embedded ..");

	for(p = f; *p; p++){

		c = *p;

		if( !isascii(c) || isspace(c) || !isprint(c) )

			Error("bad char");

		/* check for characters interpreted by the shell (by which

		   nefarious users might otherwise break into the system) */

		if ( strchr("\"'`$\n;&|^<>()\\", c) || (c & 0200) )

			Error("unsafe character");

	}

}

nt

main(int argc, char **argv)

{

	int rc, removes = 0;

	unsigned long tim, len, sum;

	char cmd[21], name[2001];

	double space = 0.;

	progname = argv[0];

	while((rc=fscanf(stdin,"%20s %2000s %lu %lu %lx",

				cmd,name,&tim,&len,&sum))!=EOF){

		if(rc!=5) Error("saw %d fields, expected 5",rc);

		filechk(name);

		switch(*cmd){

		case 'g': /* get */

			space += len;

			break;

		case 'r': /* rm */

			space -= len;

			removes++;

			break;

		case 't': /* time */

			break;

		default:

			Error("? %s %s",cmd,name);

		}

	}

	space /= 1.e6;

	if(space>50.)

		Error("will need %gMB additional disk\n",space);

	if(removes>30)

		Error("%d files to be removed\n",removes);

	exit(0);

}

.