From 08aefa7dde7ad0ae4821af4246ba1eda3a86167a Mon Sep 17 00:00:00 2001
From: Leonid Krivoshein <klark@altlinux.org>
Date: Sun, 22 Apr 2018 15:25:16 +0300
Subject: [PATCH] udev.c, udev.h: new source files added.

---
 udev.c | 162 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 udev.h |  25 +++++++++
 2 files changed, 187 insertions(+)
 create mode 100644 udev.c
 create mode 100644 udev.h

diff --git a/udev.c b/udev.c
new file mode 100644
index 0000000..0c211a9
--- /dev/null
+++ b/udev.c
@@ -0,0 +1,162 @@
+/*
+ * Guillaume Cottenceau (gc@mandrakesoft.com)
+ *
+ * Copyright 2000 MandrakeSoft
+ *
+ * This software may be freely redistributed under the terms of the GNU
+ * public license.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+/*
+ * Portions from Erik Troan (ewt@redhat.com),
+ *
+ * Copyright 1996 Red Hat Software
+ *
+ */
+
+#include <errno.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <dirent.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <sys/stat.h>
+#include <sys/vfs.h>
+#include <sys/wait.h>
+#include <linux/vt.h>
+
+#include "init.h"
+#include "udev.h"
+#include "common.h"
+
+/*
+ * This need to safe symbols import
+ */
+#define fatal(m)	init_fatal(m)
+#define warn(m)		init_warn(m)
+
+/* defined in init.c */
+extern int cooperate_mode;
+extern char * const env[];
+
+static pid_t udevd_pid;
+
+
+static void spawn_wait(char * const command[], const char *message)
+{
+	int status = 0;
+
+	if (waitpid(spawn(command), &status, 0) < 0 || !(WIFEXITED(status))) {
+		warn(message);
+	}
+}
+
+
+static void spawn_silent(char * const command[])
+{
+	int fd = 0;
+	pid_t pid = fork();
+
+	if (pid < 0)
+		fatal(command[0]);
+	else if (pid == 0) {
+		fd = open("/dev/null", O_WRONLY, 0666);
+		if (fd >= 0) {
+			dup2(fd, 1);
+			dup2(fd, 2);
+			close(fd);
+		}
+		execve(command[0], &command[1], env);
+		perror(command[0]);
+		exit(1);
+	}
+
+	if (waitpid(pid, &fd, 0) >= 0) {
+		fd = WIFEXITED(fd);
+	}
+}
+
+
+void udev_start(void)
+{
+	/* See make-initrd v0.8.x @ /data/lib/initrd/modules/050-udev for more details */
+	static char* const udevd[]    = {"/sbin/udevd",   "udevd",   "--resolve-names=never", NULL};
+	static char* const priority[] = {"/sbin/udevadm", "udevadm", "control", "--log-priority=info", NULL};
+	static char* const startup[]  = {"/sbin/udevadm", "udevadm", "control", "--property=STARTUP=1", NULL};
+	static char* const reload[]   = {"/sbin/udevadm", "udevadm", "control", "--reload-rules", NULL};
+	static char* const subsys[]   = {"/sbin/udevadm", "udevadm", "trigger", "--type=subsystems", "--action=add", NULL};
+	static char* const devices[]  = {"/sbin/udevadm", "udevadm", "trigger", "--type=devices",    "--action=add", NULL};
+
+	if (mkdirs_dev(".udev", ".udev/db", NULL) < 0)
+		fatal("/dev/.udev/db");
+	if (cooperate_mode) {
+		if (mkdir_dev(".udev/queue") < 0)
+			fatal("cannot create /dev/.udev/queue");
+		/* No more to do in lazy initialization mode */
+		return;
+	}
+
+	printf("Spawning udevd... ");
+
+	udevd_pid = spawn(udevd);
+	spawn_wait(priority, "udev_priority");
+	spawn_wait(startup, "udev_startup");
+	spawn_silent(reload);
+
+	if (mkdir_dev(".udev/queue") < 0)
+		fatal("cannot create /dev/.udev/queue");
+
+	spawn_silent(subsys);
+	spawn_silent(devices);
+	udev_settle();
+
+	printf("done\n");
+}
+
+
+void udev_settle(void)
+{
+	/* See make-initrd v0.8.x @ /data/lib/initrd/modules/080-loop for more details */
+	static char* const settle[] = {"/sbin/udevadm", "udevadm", "settle", "--timeout=5", NULL};
+
+	spawn_wait(settle, "udev_settle");
+}
+
+
+void udev_stop(void)
+{
+	int fd, n = 0;
+
+	/* This code moved from init.c/main() for compatibility */
+
+	udev_settle();
+	if (!cooperate_mode) {
+		kill(udevd_pid, 9);
+		if (waitpid(udevd_pid, &n, 0) >= 0)
+			n = WIFEXITED(n);
+	}
+	nuke_dir("/dev/.udev/queue");
+	fd = open("/.udev_version", O_RDONLY, 0);
+	if (fd >= 0) {
+		char buf[32];
+
+		n = read(fd, buf, sizeof(buf));
+		close(fd);
+
+		fd = creat("/dev/.initramfs/udev_version", 0);
+		if (fd < 0)
+			fatal("/dev/.initramfs/udev_version");
+		else {
+			n = write(fd, buf, n);
+			close(fd);
+		}
+	}
+}
+
diff --git a/udev.h b/udev.h
new file mode 100644
index 0000000..44226eb
--- /dev/null
+++ b/udev.h
@@ -0,0 +1,25 @@
+/*
+ * Guillaume Cottenceau (gc@mandrakesoft.com)
+ *
+ * Copyright 2000 MandrakeSoft
+ *
+ * This software may be freely redistributed under the terms of the GNU
+ * public license.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+/*
+ * Portions from Erik Troan (ewt@redhat.com),
+ *
+ * Copyright 1996 Red Hat Software
+ *
+ */
+
+void udev_start(void);
+void udev_settle(void);
+void udev_stop(void);
+