example devfs config file, patch from Tito.

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+# Sample /etc/devfsd.conf configuration file.
+# Richard Gooch  <rgooch@atnf.csiro.au>         17-FEB-2002
+#
+# adapted for busybox devfsd implementation by Tito <farmatito@tiscali.it>
+#
+# Enable full compatibility mode for old device names. You may comment these
+# out if you don't use the old device names. Make sure you know what you're
+# doing!
+REGISTER        .*              MKOLDCOMPAT
+UNREGISTER      .*              RMOLDCOMPAT
+
+# You may comment out the above and uncomment the following if you've
+# configured your system to use the original "new" devfs names or the really
+# new names
+#REGISTER       ^vc/            MKOLDCOMPAT
+#UNREGISTER     ^vc/            RMOLDCOMPAT
+#REGISTER       ^pty/           MKOLDCOMPAT
+#UNREGISTER     ^pty/           RMOLDCOMPAT
+#REGISTER       ^misc/          MKOLDCOMPAT
+#UNREGISTER     ^misc/          RMOLDCOMPAT
+
+# You may comment these out if you don't use the original "new" names
+REGISTER        .*              MKNEWCOMPAT
+UNREGISTER      .*              RMNEWCOMPAT
+
+# Enable module autoloading. You may comment this out if you don't use
+# autoloading
+# Not supported by busybox
+#LOOKUP         .*              MODLOAD
+# Maybe one of these works for busybox
+#LOOKUP         .*              EXECUTE /sbin/modprobe -k -v -C /etc/modules.devfs *
+#REGISTER       .*              EXECUTE /sbin/modprobe -k -v -C /etc/modules.devfs *
+
+# Uncomment the following if you want to set the group to "tty" for the
+# pseudo-tty devices. This is necessary so that mesg(1) can later be used to
+# enable/disable talk requests and wall(1) messages.
+REGISTER        ^pty/s.*        PERMISSIONS     -1.tty  0600
+#REGISTER       ^pts/.*         PERMISSIONS     -1.tty  0600
+
+# Restoring /dev/log on startup would trigger the minilogd/initlog deadlock
+# (minilogd falsely assuming syslogd has been started).
+REGISTER        ^log$           IGNORE
+CREATE          ^log$           IGNORE
+CHANGE          ^log$           IGNORE
+DELETE          ^log$           IGNORE
+
+#
+# Uncomment this if you want permissions to be saved and restored
+# Do not do this for pseudo-terminal devices
+REGISTER        ^pt[sy]         IGNORE
+CREATE          ^pt[sy]         IGNORE
+CHANGE          ^pt[sy]         IGNORE
+DELETE          ^pt[sy]         IGNORE
+REGISTER        .*              COPY    /lib/dev-state/$devname $devpath
+CREATE          .*              COPY    $devpath /lib/dev-state/$devname
+CHANGE          .*              COPY    $devpath /lib/dev-state/$devname
+#DELETE         .*              CFUNCTION GLOBAL unlink /lib/dev-state/$devname
+# Busybox
+DELETE          .*              EXECUTE /bin/rm -f              /lib/dev-state/$devname
+
+RESTORE         /lib/dev-state
+
+#
+# Uncomment this if you want the old /dev/cdrom symlink
+#REGISTER       ^cdroms/cdrom0$ CFUNCTION GLOBAL mksymlink $devname cdrom
+#UNREGISTER     ^cdroms/cdrom0$ CFUNCTION GLOBAL unlink cdrom
+# busybox
+REGISTER        ^cdroms/cdrom0$ EXECUTE /bin/ln -sf $devname cdrom
+UNREGISTER      ^cdroms/cdrom0$ EXECUTE /bin/rm -f cdrom
+
+
+#REGISTER       ^v4l/video0$    CFUNCTION GLOBAL mksymlink v4l/video0 video
+#UNREGISTER     ^v4l/video0$    CFUNCTION GLOBAL unlink video
+#REGISTER       ^radio0$        CFUNCTION GLOBAL mksymlink radio0 radio
+#UNREGISTER     ^radio0$        CFUNCTION GLOBAL unlink radio
+# Busybox
+REGISTER        ^v4l/video0$    EXECUTE /bin/ln -sf v4l/video0 video
+UNREGISTER      ^v4l/video0$    EXECUTE /bin/rm -f video
+REGISTER        ^radio0$                EXECUTE /bin/ln -sf  radio0 radio
+UNREGISTER      ^radio0$                EXECUTE /bin/rm -f radio
+
+# ALSA stuff
+# Not supported by busybox
+#LOOKUP                 snd             MODLOAD ACTION snd
+# Maybe this works for busybox
+#LOOKUP                 snd             EXECUTE /sbin/modprobe -k -v -C /etc/modules.devfs snd
+
+# Uncomment this to let PAM manage devfs
+#REGISTER       .*              CFUNCTION /lib/security/pam_console_apply_devfsd.so pam_console_apply_single $devpath
+
+# Uncomment this to manage USB mouse
+#REGISTER       ^input/mouse0$  CFUNCTION GLOBAL mksymlink $devname usbmouse
+#UNREGISTER     ^input/mouse0$  CFUNCTION GLOBAL unlink usbmouse
+# Busybox
+REGISTER        ^input/mice$    EXECUTE /bin/ln -sf $devname usbmouse
+UNREGISTER      ^input/mice$    EXECUTE /bin/rm -f usbmouse
+
+# If you have removable media and want to force media revalidation when looking
+# up new or old compatibility names, uncomment the following lines
+# SCSI NEWCOMPAT  /dev/sd/* names
+LOOKUP          ^(sd/c[0-9]+b[0-9]+t[0-9]+u[0-9]+)p[0-9]+$      EXECUTE /bin/dd if=$mntpnt/\1 of=/dev/null count=1
+# SCSI OLDCOMPAT  /dev/sd?? names
+LOOKUP          ^(sd[a-z]+)[0-9]+$      EXECUTE /bin/dd if=$mntpnt/\1 of=/dev/null count=1
+# IDE NEWCOMPAT   /dev/ide/hd/* names
+LOOKUP          ^(ide/hd/c[0-9]+b[0-9]+t[0-9]+u[0-9]+)p[0-9]+$  EXECUTE /bin/dd if=$mntpnt/\1 of=/dev/null count=1
+# IDE OLDCOMPAT   /dev/hd?? names
+LOOKUP          ^(hd[a-z])[0-9]+$       EXECUTE /bin/dd if=$mntpnt/\1 of=/dev/null count=1
+# IDE-SCSI NEWCOMPAT  /dev/sd/* names
+#LOOKUP         ^(sd/c[0-9]+b[0-9]+t[0-9]+u[0-9]+)p[0-9]+$      EXECUTE /bin/dd if=$mntpnt/\1 of=/dev/null count=1
+# SCSI OLDCOMPAT  /dev/scd? names
+LOOKUP          ^(scd+)[0-9]+$  EXECUTE /bin/dd if=$mntpnt/\1 of=/dev/null count=1
+
+
+REGISTER ^dvb/card[0-9]+/[^/]+$ PERMISSIONS root.video 0660
+# Busybox
+#REGISTER       ^dvb/card([0-9]+)/([^/0-9]*)[0-9]+$     CFUNCTION GLOBAL mksymlink /dev/$devname ost/\2\1
+#UNREGISTER     ^dvb/card([0-9]+)/([^/0-9]*)[0-9]+$     CFUNCTION GLOBAL unlink ost/\2\1
+REGISTER        ^dvb/card([0-9]+)/([^/0-9]*)[0-9]+$     EXECUTE /bin/ln -sf /dev/$devname ost/\2\1
+UNREGISTER      ^dvb/card([0-9]+)/([^/0-9]*)[0-9]+$     EXECUTE /bin/rm -f ost/\2\1
+
+# Include package-generated files from /etc/devfs/conf.d
+# Supported by busybox
+#OPTIONAL_INCLUDE   /etc/devfs/conf.d/dvd.conf
+#INCLUDE   /etc/devfs/conf.d/dvd.conf
+#OPTIONAL_INCLUDE   /etc/devfs/conf.d/
+#INCLUDE   /etc/devfs/conf.d/
+
+#/etc/devfs/conf.d/dvd.conf
+#REGISTER       ^ide/host0/bus1/target1/lun0/cd$        CFUNCTION GLOBAL mksymlink ide/host0/bus1/target1/lun0/cd dvd
+#UNREGISTER     ^ide/host0/bus1/target1/lun0/cd$        CFUNCTION GLOBAL unlink dvd
+REGISTER        ^ide/host0/bus1/target1/lun0/cd$        EXECUTE ln -sf ide/host0/bus1/target1/lun0/cd dvd
+UNREGISTER      ^ide/host0/bus1/target1/lun0/cd$        EXECUTE rm -f dvd
+
+#/etc/devfs/conf.d/dynamic.conf
+# dynamic desktop and co
+
+REGISTER        .*/part.*       EXECUTE /etc/dynamic/scripts/part.script add $devpath
+UNREGISTER      .*/part.*       EXECUTE /etc/dynamic/scripts/part.script del $devpath
+
+REGISTER        v4l/video.*     EXECUTE /etc/dynamic/scripts/webcam.script add $devpath
+UNREGISTER      v4l/video.*     EXECUTE /etc/dynamic/scripts/webcam.script del $devpath
+
+REGISTER        usb/scanner.*   EXECUTE /etc/dynamic/scripts/scanner.script add $devpath
+UNREGISTER      usb/scanner.*   EXECUTE /etc/dynamic/scripts/scanner.script del $devpath
+
+REGISTER        usb/rio500      EXECUTE /etc/dynamic/scripts/rio500.script add $devpath
+UNREGISTER      usb/rio500      EXECUTE /etc/dynamic/scripts/rio500.script del $devpath
+
+REGISTER        usb/tts/[13579] EXECUTE /etc/dynamic/scripts/visor.script add $devpath
+UNREGISTER      usb/tts/[13579] EXECUTE /etc/dynamic/scripts/visor.script del $devpath
+
+REGISTER        (usb/lp.*|printers/.*)  EXECUTE /etc/dynamic/scripts/lp.script add $devpath
+UNREGISTER      (usb/lp.*|printers/.*)  EXECUTE /etc/dynamic/scripts/lp.script del $devpath
+
+#/etc/devfs/conf.d/modem.conf
+#REGISTER       ^$      CFUNCTION GLOBAL mksymlink  modem
+#UNREGISTER     ^$      CFUNCTION GLOBAL unlink modem
+REGISTER        ^tts/0$ EXECUTE ln -sf  $devname modem
+UNREGISTER      ^$      EXECUTE rm -f modem
+
+#/etc/devfs/conf.d/mouse.conf
+#REGISTER       ^misc/psaux$    CFUNCTION GLOBAL mksymlink misc/psaux mouse
+#UNREGISTER     ^misc/psaux$    CFUNCTION GLOBAL unlink mouse
+REGISTER        ^misc/psaux$    EXECUTE ln -sf misc/psaux mouse
+UNREGISTER      ^misc/psaux$    EXECUTE rm -f mouse
+
+#/etc/devfs/conf.d/psaux.conf
+#REGISTER       ^misc/psaux$    CFUNCTION GLOBAL mksymlink misc/psaux psaux
+#UNREGISTER     ^misc/psaux$    CFUNCTION GLOBAL unlink psaux
+REGISTER        ^misc/psaux$    EXECUTE ln -sf misc/psaux psaux
+UNREGISTER      ^misc/psaux$    EXECUTE rm -f psaux
+
+#/etc/devfs/conf.d/rdvd.conf
+REGISTER        ^ide/host0/bus1/target1/lun0/cd$        EXECUTE /etc/dynamic/scripts/rawdevice.script add /dev/ide/host0/bus1/target1/lun0/cd /dev/rdvd
+UNREGISTER      ^ide/host0/bus1/target1/lun0/cd$        EXECUTE /etc/dynamic/scripts/rawdevice.script del /dev/rdvd
+
+#/etc/devfs/conf.d/ttyS0.conf
+#REGISTER       ^tts/0$ CFUNCTION GLOBAL mksymlink tts/0 ttyS0
+#UNREGISTER     ^tts/0$ CFUNCTION GLOBAL unlink ttyS0
+REGISTER        ^tts/0$ EXECUTE ln -sf $devname ttyS0
+UNREGISTER      ^tts/0$ EXECUTE rm -f ttyS0