init: reboot, acpid

tools/init/acpid.c

@@ -0,0 +1,44 @@
+#include <unistd.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "common.h"
+
+int main() {
+	if (daemon(0, 0)) {
+		perror("acpid: daemon");
+		return EXIT_FAILURE;
+	}
+
+	int fd = open("/dev/acpi", O_RDONLY);
+	if (fd == -1) {
+		perror("acpid: open");
+		return EXIT_FAILURE;
+	}
+
+	for (;;) {
+		char c;
+		int n = read(fd, &c, 1);
+
+		int cmdfd = open(COMMAND_FIFO, O_WRONLY);
+		if (cmdfd == -1) {
+			perror("acpid: open");
+			continue;
+		}
+
+		switch (c) {
+			case 'p':
+				if (write(cmdfd, &c, 1) < 0)
+					perror("acpid: write");
+				break;
+			default:
+				fprintf(stderr, "acpid: unknown acpi event %c\n", c);
+		}
+
+		close(cmdfd);
+	}
+
+	close(fd);
+	return EXIT_SUCCESS;
+}