+ /* setup signal handler pipe */
+ retval = pipe(signal_pipe);
+ if (retval < 0) {
+ err("error getting pipes: %s", strerror(errno));
+ goto exit;
+ }
+
+ retval = fcntl(signal_pipe[READ_END], F_GETFL, 0);
+ if (retval < 0) {
+ err("error fcntl on read pipe: %s", strerror(errno));
+ goto exit;
+ }
+ retval = fcntl(signal_pipe[READ_END], F_SETFL, retval | O_NONBLOCK);
+ if (retval < 0) {
+ err("error fcntl on read pipe: %s", strerror(errno));
+ goto exit;
+ }
+
+ retval = fcntl(signal_pipe[WRITE_END], F_GETFL, 0);
+ if (retval < 0) {
+ err("error fcntl on write pipe: %s", strerror(errno));
+ goto exit;
+ }
+ retval = fcntl(signal_pipe[WRITE_END], F_SETFL, retval | O_NONBLOCK);
+ if (retval < 0) {
+ err("error fcntl on write pipe: %s", strerror(errno));
+ goto exit;
+ }
+
+ /* parse the rules and keep them in memory */
+ sysfs_init();