#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <dirent.h>
#include "dirwalk.h"

/* ripped off from K&R 2nd ed */
void
dirwalk(char *dir, void (*fnp)(char*))
{
	char buf[1024];
	struct dirent *dp;
	DIR *dfd;
	char *fn;

	dfd = opendir(dir);
	if(dfd == NULL){
		fprintf(stderr, "dirwalk: no such directory: %s\n", dir);
		return;
	}
	while((dp = readdir(dfd)) != NULL){
		fn = dp->d_name;
		if(strcmp(fn, ".") == 0 || strcmp(fn, "..") == 0)
			continue;
		if(strlen(dir) + strlen(fn) + 2 > sizeof buf)
			fprintf(stderr, "dirwalk: filename too long: %s", buf);
		else{
			snprintf(buf, sizeof buf, "%s/%s", dir, fn);
			(*fnp)(buf);
		}
	}
	closedir(dfd);
}