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Current issue : #51 | Release date : 1997-09-01 | Editor : route

Introduction	Phrack Staff
Phrack Loopback	Phrack Staff
Line Noise	various
Phrack Prophile on Swamp Ratte	Phrack Staff
File Descriptor Hijacking	orabidoo
LOKI2 (the implementation)	route
Juggernaut 1.0 - 1.2 patchfile	route
Shared Library Redirection	halflife
Bypassing Integrity Checking Systems	halflife
Stealth RPC scanning	halflife
The Art of Scanning	Fyodor
The Eternity Service	Adam Back
Monoalphabetic cipher cryptanalysis	mythrandir
Phrack Magazine Article Index Guide	guyver
A Brief introduction to CCS7	Narbo
Phrack World News	disorder
extract.c	Phrack Staff

Title : extract.c

Author : Phrack Staff

---[  Phrack Magazine   Volume 7, Issue 51 September 01, 1997, article 17 of 17


-------------------------[  Phrack Magzine Extraction Utility


--------[  Phrack Staff

    This time around, you have the option of using the C version of extract, 
or the PERL version, contributed by Daos.


---------------------8<------------CUT-HERE----------->8---------------------
 
/*  extract.c by Phrack Staff and sirsyko 
 *
 *  (c) Phrack Magazine, 1997 
 *
 *  Extracts textfiles from a specially tagged flatfile into a hierarchical 
 *  directory strcuture. Use to extract source code from any of the articles 
 *  in Phrack Magazine (first appeared in Phrack 50).
 *
 *  gcc -o extract extract.c
 *  
 *  ./extract filename   
 */   

 
#include <stdio.h>
#include <sys/stat.h>
#include <string.h>

int main(int argc, char **argv){ 

    char *s="<++> ",*e="<-->",b[256],*bp; 
    FILE *f,*o = NULL; 
    int l, n, i=0; 

    l = strlen(s); 
    n = strlen(e); 

    if(argc<2) {
        printf("Usage: %s <inputfile>\n",argv[0]);
        exit(1); 
    }

    if(! (f=fopen(argv[1], "r"))) {
        printf("Could not open input file.\n");
	exit(1);
    }

    while(fgets(b, 256, f)){ 

        if(!strncmp (b, s, l)){ 
	    b[strlen(b)-1] = '\0'; 

	    if((bp=strchr(b+l+1,'/')))
	        while (bp){ 
		    *bp='\0';
		    mkdir(b+l, 0700); 
		    *bp='/';
		    bp=strchr(bp+1,'/'); 
		}
	    if((o = fopen(b+l, "w"))) 
	        printf("- Extracting %s\n",b+l);
	    else {
		printf("Could not extract '%s'\n",b+l);
		exit(1);
	    }
	} 
        else if(!strncmp (b, e, n)){
	    if(o) fclose(o);
	    else {
	        printf("Error closing file.\n");
		exit(1);
	    }
        } 
        else if(o) {
            fputs(b, o);
            i++;
        }
    }
    if(!i) printf("No extraction tags found.\n");
    return(0);
}

---------------------8<------------CUT-HERE----------->8---------------------

# Daos <daos@nym.alias.net>

<++> extract.pl
#!/bin/sh -- # -*- perl -*- -n
eval 'exec perl $0 -S ${1+"$@"}' if 0;

$opening=0;

if (/^\<\+\+\>/) {$curfile = substr($_ , 5); $opening=1;};
if (/^\<\-\-\>/) {close ct_ex; $opened=0;}; 
if ($opening) {                        
        chop $curfile;                 
        $sex_dir= substr( $curfile, 0, ((rindex($curfile,'/'))) ) if ($curfile =~ m/\//);
        eval {mkdir $sex_dir, "0777";}; 
        open(ct_ex,">$curfile"); 
        print "Attempting extraction of $curfile\n";
        $opened=1; 
}
if ($opened && !$opening) {print ct_ex $_}; 
<-->

----[  EOF