busybox/libbb/concat_path_file.c

/* vi: set sw=4 ts=4: */
/*
 * Utility routines.
 *
 * Copyright (C) many different people.
 * If you wrote this, please acknowledge your work.
 *
 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
 */

/* concatenate path and file name to new allocation buffer,
 * not addition '/' if path name already have '/'
*/

#include "libbb.h"

char *concat_path_file(const char *path, const char *filename)
{
	char *lc;

	if (!path)
		path = "";
	lc = last_char_is(path, '/');
	while (*filename == '/')
		filename++;
	return xasprintf("%s%s%s", path, (lc==NULL ? "/" : ""), filename);
}