#include "exec.h"
#include "../sys/execve.h"
#include "../env/env.h"
#include "../cstr/cstr.h"
#include "../malloc/malloc.h"

int exec(const char **argv)
{
	const char *path = getenv("PATH");
	const char *end;
	char *filename;

	while (*path) {
		end = path;

		while (*end && *end != ':') ++end;

		filename = malloc((end - path) + cstr_length(argv[0]) + 2);

		for (int i = 0; i < end - path; ++i)
			filename[i] = path[i];

		filename[end - path] = '/';

		for (int i = 0; i < cstr_length(argv[0]) + 1; ++i)
			filename[(end - path) + i + 1] = argv[0][i];

		execve(filename, argv, getenvp());
		free(filename);

		path = end;

		if (*path == ':')
			++path;
	}

	return execve(argv[0], argv, getenvp());
}