AOH :: P51-17.TXT

extract.c



---[  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

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