/*******************************************************************************

	Copyright(C) Jonas 'Sortie' Termansen 2011, 2012.

	This file is part of LibMaxsi.

	LibMaxsi is free software: you can redistribute it and/or modify it under
	the terms of the GNU Lesser General Public License as published by the Free
	Software Foundation, either version 3 of the License, or (at your option)
	any later version.

	LibMaxsi is distributed in the hope that it will be useful, but WITHOUT ANY
	WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
	FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
	details.

	You should have received a copy of the GNU Lesser General Public License
	along with LibMaxsi. If not, see <http://www.gnu.org/licenses/>.

	execvpe.cpp
	Loads a process image.

*******************************************************************************/

#include <stdlib.h>
#include <string.h>
#include <unistd.h>

// Note that the only PATH variable in Sortix is the one used here.
extern "C" int execvpe(const char* filename, char* const* argv,
                       char* const* envp)
{
	if ( strchr(filename, '/') )
		return execve(filename, argv, envp);
	size_t filenamelen = strlen(filename);
	const char* PATH = "/bin";
	size_t pathlen = strlen(PATH);
	char* pathname = (char*) malloc(filenamelen + 1 + pathlen + 1);
	if ( !pathname ) { return -1; }
	stpcpy(stpcpy(stpcpy(pathname, PATH), "/"), filename);
	int result = execve(pathname, argv, envp);
	free(pathname);
	return result;
}