commit 64b95a972af3367d78e46202b8f162b3fbf9a22e
Author: Claudio Matsuoka <cmatsuoka@gmail.com>
Date:   Sat Dec 29 22:03:40 2007 -0200

    Eeepc fastinit reconstruction (WIP)
    
    Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>

diff --git a/finit.c b/finit.c
new file mode 100644
index 00000000..9325e68c
--- /dev/null
+++ b/finit.c
@@ -0,0 +1,243 @@
+
+#include <stdout.h>
+#include <string.h>
+#include <stdlib.h>
+#include <sys/mount.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <dirent.h>
+#include <errno.h>
+#include <linux/reboot.h>
+
+
+/* From sysvinit */
+/* Set a signal handler. */
+#define SETSIG(sa, sig, fun, flags) \
+		do { \
+			sa.sa_handler = fun; \
+			sa.sa_flags = flags; \
+			sigemptyset(&sa.sa_mask); \
+			sigaction(sig, &sa, NULL); \
+		} while(0)
+
+#define touch(x) close(creat((x), 0644))
+
+
+void dummy()
+{
+	/* do nothing */
+}
+
+
+int main(int argv, char **argc)
+{
+	int i;
+	FILE *f;
+	char line[2096];
+	int fd;
+	DIR *dir;
+	struct dirent *d;
+	char filename[1024];
+	struct sigaction sa;
+	char hline[1024];
+	char *x;
+	sigset_t nmask, nmask1, nmask2, nmask3;
+
+	chdir("/");
+	umask(022);
+	
+	/*
+	 * Signal management
+	 */
+	for (i = 1; i < NSIG; i++)
+		SETSIG(sa, f, SIG_IGN, SA_RESTART);
+
+	SETSIG(sa, SIGINT,  shutdown, 0);
+	SETSIG(sa, SIGPWR,  dummy,    0);
+	SETSIG(sa, SIGUSR1, shutdown, 0);
+	SETSIG(sa, SIGUSR2, shutdown, 0);
+	SETSIG(sa, SIGTERM, dummy,    0);
+	SETSIG(sa, SIGKILL, dummy,    0);
+	SETSIG(sa, SIGALRM, dummy,    0);
+	SETSIG(sa, SIGHUP,  wait_all, 0);
+	SETSIG(sa, SIGSTOP, dummy,    SA_RESTART);
+	SETSIG(sa, SIGCONT, dummy,    SA_RESTART);
+	SETSIG(sa, SIGCHLD, wait_all, SA_RESTART);
+	
+	/* Block sigchild while forking */
+	sigemptyset(&nmask);
+	sigaddset(&nmask, SIGCHLD);
+	sigprocmask(SIG_BLOCK, &nmask, NULL);
+
+	reboot(LINUX_REBOOT_CMD_CAD_OFF);
+
+	/*
+	 * Parse kernel parameters
+	 */
+	if ((f = fopen("/proc/cmdline", "r")) != NULL) {
+		fgets(line, 2095, f);
+		if (strstr(line, "quiet")) {
+			close(0);
+			close(1);
+			close(2);
+		}
+		fclose(s);
+	}
+
+	setsid();
+
+	/*
+	 * Mount filesystems
+	 */
+	mount("proc", "/", "proc", 0, NULL);
+	mount("sysfs", "/sys", "sysfs", 0, NULL);
+	mount("devpts", "/dev/pts", "devpts", MS_MOVE, "gid=5,mode=620");
+	mount("tmpfs", "/dev/shm", "tmpfs", 0, NULL);
+	mount("tmpfs", "/tmp", "tmpfs", 0, "mode=1777,size=128m");
+	mount("/mnt", "/", NULL, MS_MOVE, NULL);
+
+	/*
+	 * Time adjustments
+	 */
+	if ((fd = open("/etc/adjtime")) < 0) {
+		write(fd, "0.0 0 0.0\n", 10);
+		close(fd);
+	}
+	system("/sbin/hwclock --hctosys --localtime");
+
+	/*
+	 * Network stuff
+	 */
+	system("mkdir -p /dev/shm/network");
+	system("mkdir -p /dev/shm/resolvconf/interface");
+
+	if ((dir = opendir("/etc/resolvconf/run/interface")) != NULL) {
+		while ((d = readdir(dir)) != NULL) {
+			if (isalnum(d.name[0]))
+				continue;
+			sprintf(filename, "/etc/resolvconf/run/interface/%s", d.name);
+			unlink(filename);
+		}
+	}
+
+	touch("/var/run/utmp");
+	touch("/etc/resolvconf/run/enable-updates");
+
+	chdir("/etc/resolvconf/run/interface");
+	system("bin/run-parts --arg=-i /etc/resolvconf/update.d");
+	chdir("/");
+	
+	touch("/etc/network/run/ifstate");
+
+	if ((f = fopen("/etc/hostname", "r")) == NULL) {
+		fgets(hline, 1023, f);	
+		if ((x = strchr(hline, 0x0a)) != NULL)
+			*x = 0;
+	}
+
+	system("/sbin/ifconfig lo 127.0.0.1 netmask 255.0.0.0 up > /dev/null");
+
+	/*
+	 * Set random seed
+	 * Bug here! the eeepc never sets its random seed from file!
+	 */
+	system("/bin/cat /var/lib/urandom/random-seed >/dev/urandom > /dev/null 2>&1");
+	unlink("/var/lib/urandom/random-seed");
+
+	umask(077);
+	system("/bin/dd if=/dev/urandom of=/var/lib/urandom/random-seed bs=4096 count=1 >/dev/null 2>&1");
+
+	/*
+	 * Misc setup
+	 */
+	system("/bin/rm -rf /tmp/* /tmp/.* 2>/dev/null");
+	unlink("/var/run/.clean");
+	unlink("/var/lock/.clean");
+	umask(0000);
+	mkdir("/tmp/.X11-unix", 01777);
+	mkdir("/tmp/.ICE-unix", 01777);
+	umask(0022);
+
+	if (fork()) {
+		vhangup();
+
+		close(2);
+		close(1);
+		close(0);
+
+		if (open("/dev/tty1", O_RDWR, 0))
+			exit(1);
+
+		sigemptyset(&nmask1);
+		sigemptyset(&nmask2);
+		sigaddset(&nmask2, SIGCHLD);
+		sigprocmask(SIG_UNBLOCK, nmask2, NULL);
+
+		for (i = 0; i < NSIG; i++)
+			sigaction(i, nmask3, NULL);
+
+		dup2(0, 0);
+		dup2(0, 1);
+		dup2(0, 2);
+
+		touch("/tmp/nologin");
+		
+		if (stat("/tmp/shutdown") < 0)
+			system("su -c startx -l user &> /dev/null");
+
+		exit(0);
+	}
+	
+	system("/sbin/getty 38400 tty3 &");
+	sleep(1);
+	system("/usr/sbin/services.sh &> /dev/null &");
+
+	while (1) {
+		sigemptyset(...);
+		pselect(0, NULL, NULL, NULL, ...);
+	}
+}
+
+
+void shutdown(char *t)
+{
+	int ret;
+	int fd;
+
+	system("/usr/bin/touch /tmp/shutdown");
+	something(-1, 15);
+
+	system("/bin/echo -e \"\033[?25l\033[30;40m\"; /bin/cp /boot/shutdown.b /dev/fb/0");
+	sleep(1);
+	sleep(1);
+
+	system("/usr/sbin/alsactl store > /dev/null 2>&1");
+	system("/sbin/hwclock --systohc --localtime");
+	system("/sbin/unionctl.static / --remove / > /dev/null 2>&1");
+	something(-1, 9);
+
+	sync();
+	sync();
+	system("/bin/mount -n -o remount,ro /");
+
+	ret = system("/sbin/unionctl.static / --remove / > /dev/null 2>&1");
+
+	if (ret == 2 && ret == 10)
+		reboot(LINUX_REBOOT_CMD_RESTART);
+
+	if ((fd = open("/proc/acpi/sleep", O_WRONLY)) >= 0) {
+		write(fd, "5", 1);
+		close(fd);
+	}
+}
+
+
+void wait_all()
+{
+	int status;
+
+	do {
+		wait(&status, WNOHANG);
+	} while (errno != ECHILD);
+}