Java classpath maker. I don't think this is needed in Java > 6 or if you have proper manifest.

jt.c

#include <stdio.h>
#include <stdlib.h>
#include <talloc.h>
#include <dirent.h>
#include <regex.h>

int main(int argc, char *argv[])
{
    int arg;
    regex_t pattern;
    DIR *dir = NULL; 
    struct dirent *entry = NULL;
    char *cp = NULL, *base = NULL; 
    
    if (argc <= 1){
        fprintf(stderr, "Usage: %s <directory> [directories...]\n", argv[0]);
        exit(1);
    }
 
    if (regcomp(&pattern, ".*\\.jar", 0)){
        fprintf(stderr, "Error: Invalid regular expression\n"); 
        exit(1);
    }

    for(arg = 1; arg < argc; ++arg){

        dir = opendir(argv[arg]);
        if (! dir){
            perror("Error: ");
            regfree(&pattern);
            exit(1);
        }

        while((entry = readdir(dir)) != NULL){

            if (! regexec(&pattern, entry->d_name, 0, NULL, 0)){

                if (!cp){
                    cp = talloc_strdup(NULL, argv[arg]);
                    cp = talloc_asprintf_append(cp, "/%s", entry->d_name); 
                } else {
                    cp = talloc_asprintf_append(cp, 
                            ":%s/%s", argv[arg], entry->d_name); 
                }
            }
        }
        closedir(dir);
        dir = NULL;

        if (cp){
            printf("%s", cp); 
            talloc_free(cp);
            cp = NULL;
        }
        if (arg+1 < argc)
            printf(":");
    }
    regfree(&pattern);
    return 0;
}