Function open

Common/Uncompress.cpp:189–212

If the specified file is compressed, return a pipe that * uncompresses it. */

 * uncompresses it.
 */
int open(const char *path, int flags, mode_t mode)
{
	static open_t real_open;
	if (real_open == NULL)
		real_open = (open_t)dlsym(RTLD_NEXT, "open");
	if (real_open == NULL) {
		fprintf(stderr, "error: dlsym open: %s\n", dlerror());
		exit(EXIT_FAILURE);
	}

	// open a web address
	if (wgetExec(path) != NULL)
		return uncompress(path);
	
	// to check if the file exists, we need to attempt to open it
	int filedesc = real_open(path, flags, mode);
	if (mode != ios_base::in || filedesc < 0
			|| zcatExec(path) == NULL)
		return filedesc;
	else {
		close(filedesc);
		return uncompress(path);
	}
}

} // extern "C"