convert_delimiter(char *path, char delim)
{
	int i;
	char old_delim;

	if (path == NULL)
		return;

	if (delim == '/')
		old_delim = '\\';
	else
		old_delim = '/';

	for (i = 0; path[i] != '\0'; i++) {
		if (path[i] == old_delim)
			path[i] = delim;
	}
}

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.