udev additions/tidying

Don't override exec_prefix= and use --with-rootlibdir to copy
runtime libs to /lib while keeping most of the stuff in /usr.
With this change, we don't have to override pkgconfig, or manually
setup .so symlink. It's also friendlier towards builds with
enable-extras (which would require more additional fixes).

Enable build of static library, which will enable us to add explicit
udev support to static builds of dm/lvm.

Adjust start_udev:

- remount /dev if it's already mounted (due to initramfs or
  CONFIG_DEVTMPFS_MOUNT), which allows us to set mount options
- add inodes limit safeguard
- verify udevd is not running before starting it
- remove 'settle' between subsystems/devices

Signed-off-by: Michal Soltys <soltys@ziu.info>

udev/.footprint

@@ -57,6 +57,7 @@ lrwxrwxrwx	root/root	usr/bin/udevinfo -> /sbin/udevadm
 drwxr-xr-x	root/root	usr/include/
 -rw-r--r--	root/root	usr/include/libudev.h
 drwxr-xr-x	root/root	usr/lib/
+-rw-r--r--	root/root	usr/lib/libudev.a
 -rwxr-xr-x	root/root	usr/lib/libudev.la
 lrwxrwxrwx	root/root	usr/lib/libudev.so -> ../../lib/libudev.so.0.10.0
 drwxr-xr-x	root/root	usr/lib/pkgconfig/

udev/.md5sum

@@ -1,2 +1,2 @@
-572661c0c9cde672fa68250f9a55be94  start_udev
+443d19ce3b54ef554fc7942a709936e2  start_udev
 4db27d73fdbe94f47fd89fdd105c2dfb  udev-166.tar.bz2

udev/Pkgfile

@@ -4,7 +4,7 @@
 
 name=udev
 version=166
-release=1
+release=2
 source=(ftp://ftp.kernel.org/pub/linux/utils/kernel/hotplug/$name-$version.tar.bz2 \
         start_udev)
 
@@ -12,24 +12,21 @@ build() {
     cd udev-$version
 
     ./configure --prefix=/usr \
-                --exec-prefix= \
+                --sbindir=/sbin \
                 --sysconfdir=/etc \
-                --libdir=/usr/lib \
+                --with-rootlibdir=/lib \
                 --libexecdir=/lib/udev \
                 --mandir=/usr/man \
                 --disable-extras \
-                --disable-introspection
+                --disable-introspection \
+                --enable-static
 
     make
-    make install DESTDIR=$PKG pkgconfigdir=/usr/lib/pkgconfig
+    make install DESTDIR=$PKG
 
     mkdir -p $PKG/lib/{firmware,udev/devices/{pts,shm}}
     mkdir -p $PKG/lib
 
-    # Fix location of libaries
-    mv $PKG/usr/lib/libudev.so.* $PKG/lib
-    ln -sf ../../lib/$(readlink $PKG/usr/lib/libudev.so) $PKG/usr/lib/libudev.so
-
     # Populate nodes
     mknod -m 600 $PKG/lib/udev/devices/console c 5 1
     mknod -m 600 $PKG/lib/udev/devices/kmsg c 1 11

udev/start_udev

@@ -1,16 +1,21 @@
 #!/bin/sh
 
-# mount /dev as a devtmpfs or tmpfs, depending on current kernel capability
-# mount only, if it's not already mounted (e.g. after handover from initramfs)
-# note: some video drivers require exec access in /dev
-if ! /bin/mountpoint -q /dev ; then
-	if ! /bin/sed -n '/devtmpfs/q1' /proc/filesystems ; then
-		UDEVFS=devtmpfs
-	else
+# - if /dev is not mounted - mount as a devtmpfs (CONFIG_DEVTMPFS=y) or tmpfs
+# - if /dev is mounted (e.g. due to handover from initramfs or
+#   CONFIG_DEVTMPFS_MOUNT=y), remount with specific options
+# - some video drivers require exec access in /dev, thus it's set here
+# - for completness, we add few sanity limits (2k non-empty files, 16k inodes)
+
+UDEVOPTS="exec,nosuid,noatime,mode=0755,nr_blocks=2048,nr_inodes=16384"
+if /bin/mountpoint -q /dev ; then
+	/bin/mount -n -o remount,${UDEVOPTS} dev /dev
+else
+	if /bin/sed -n '/devtmpfs/q1' /proc/filesystems ; then
 		UDEVFS=tmpfs
+	else
+		UDEVFS=devtmpfs
 	fi
-	
-	/bin/mount -n -t $UDEVFS udev /dev -o exec,nosuid,mode=0755,size=8M
+	/bin/mount -n -t $UDEVFS -o ${UDEVOPTS} dev /dev
 fi
 
 # make sure hotplugger is not set
@@ -19,12 +24,11 @@ echo > /proc/sys/kernel/hotplug
 # since v155, udevd automatically copies /lib/udev/devices
 # and creates /proc/{kcore,self/fd/{0,1,2}} symlinks
 
-# launch udev daemon
-/sbin/udevd --daemon
+# launch udev daemon, make sure it's not running first
+test -z "$(/bin/pidof -s udevd)" && /sbin/udevd --daemon
 
 # coldplug devices and wait for the queue to be processed
 /sbin/udevadm trigger --type=subsystems --action=add
-/sbin/udevadm settle
 /sbin/udevadm trigger --type=devices --action=add
 /sbin/udevadm settle