debloat and reorganize code

split app into procd and init binaries
remove log support, this is an external service now

Signed-off-by: John Crispin <blogic@openwrt.org>

1 files changed, 115 insertions, 0 deletions

diff --git a/initd/init.c b/initd/init.c
new file mode 100644
index 0000000..d458f29
--- /dev/null
+++ b/initd/init.c
@@ -0,0 +1,115 @@
+/*
+ * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
+ * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 2.1
+ * as published by the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <sys/wait.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/reboot.h>
+
+#include <libubox/uloop.h>
+#include <libubus.h>
+
+#include <stdlib.h>
+#include <fcntl.h>
+#include <getopt.h>
+#include <libgen.h>
+#include <regex.h>
+#include <unistd.h>
+#include <stdio.h>
+
+#include "init.h"
+#include "../watchdog.h"
+
+unsigned int debug = 0;
+
+static void
+signal_shutdown(int signal, siginfo_t *siginfo, void *data)
+{
+	fprintf(stderr, "reboot\n");
+	fflush(stderr);
+	sync();
+	sleep(2);
+	reboot(RB_AUTOBOOT);
+	while (1)
+		;
+}
+
+static struct sigaction sa_shutdown = {
+	.sa_sigaction = signal_shutdown,
+	.sa_flags = SA_SIGINFO
+};
+
+static void
+cmdline(void)
+{
+	char line[256];
+	int r, fd = open("/proc/cmdline", O_RDONLY);
+	regex_t pat_cmdline;
+	regmatch_t matches[2];
+
+	if (fd < 0)
+		return;
+
+	r = read(fd, line, sizeof(line) - 1);
+	line[r] = '\0';
+	close(fd);
+
+	regcomp(&pat_cmdline, "init_debug=([0-9]+)", REG_EXTENDED);
+	if (!regexec(&pat_cmdline, line, 2, matches, 0)) {
+		line[matches[1].rm_eo] = '\0';
+		debug = atoi(&line[matches[1].rm_so]);
+	}
+	regfree(&pat_cmdline);
+}
+
+int
+main(int argc, char **argv)
+{
+	pid_t pid;
+
+	sigaction(SIGTERM, &sa_shutdown, NULL);
+	sigaction(SIGUSR1, &sa_shutdown, NULL);
+	sigaction(SIGUSR2, &sa_shutdown, NULL);
+
+	early();
+	cmdline();
+	watchdog_init(1);
+
+	pid = fork();
+	if (!pid) {
+		char *kmod[] = { "/sbin/kmodloader", "/etc/modules-boot.d/", NULL };
+
+		if (debug < 3) {
+			int fd = open("/dev/null", O_RDWR);
+
+			if (fd > -1) {
+				dup2(fd, STDIN_FILENO);
+				dup2(fd, STDOUT_FILENO);
+				dup2(fd, STDERR_FILENO);
+				if (fd > STDERR_FILENO)
+					close(fd);
+			}
+		}
+		execvp(kmod[0], kmod);
+		ERROR("Failed to start kmodloader\n");
+		exit(-1);
+	}
+	if (pid <= 0)
+		ERROR("Failed to start kmodloader instance\n");
+	uloop_init();
+	preinit();
+	uloop_run();
+
+	return 0;
+}