Date: Fri, 17 Feb 2012 21:41:06 +0100 From: vermaden <vermaden@interia.pl> To: matt <sendtomatt@gmail.com> Cc: freebsd-hackers@freebsd.org, freebsd-current@freebsd.org, freebsd-stable@FreeBSD.org Subject: Re: devd based AUTOMOUNTER Message-ID: <lumkdohgpitpiglhwvdq@ycbb> In-Reply-To: <4F3EA8F6.6040702@gmail.com> References: <hkubftdrahxmtuzcfqzh@ziad> <4F3EA8F6.6040702@gmail.com>
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I already made some changes for the 'better' ...
Here is the latest version:
#! /bin/sh
PATH=3D/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin
LOG=3D"/var/log/automount.log"
STATE=3D"/var/run/automount.state"
DATEFMT=3D"%Y-%m-%d %H:%M:%S"
__create_mount_point() { # /* 1=3DDEV */
MNT=3D"/mnt/$( basename ${1} )"
mkdir -p ${MNT}
}
__state_lock() {
while [ -f ${STATE}.lock ]; do sleep 0.5; done
:> ${STATE}.lock
}
__state_unlock() {
rm ${STATE}.lock
}
__state_add() { # /* 1=3DDEV 2=3DPROVIDER 3=3DMNT */
__state_lock
grep -E "${3}$" ${STATE} 1> /dev/null 2> /dev/null && {
__log "${1}:duplicated '${STATE}'"
return 1
}
echo "${1} ${2} ${3}" >> ${STATE}
__state_unlock
}
__state_remove() { # /* 1=3DMNT 2=3DSTATE 3=3DLINE */
BSMNT=3D$( echo ${1} | sed 's/\//\\\//g' )
sed -i '' "/${BSMNT}\$/d" ${2}
}
__log() { # /* @=3DMESSAGE */
echo $( date +"${DATEFMT}" ) ${@} >> ${LOG}
}
case ${2} in
(attach)
for I in /dev/${1}*
do
case $( file -L -s ${I} ) in
(*NTFS*)
__create_mount_point ${I}
ntfs-3g ${I} ${MNT} # /* sysutils/fusefs-ntfs */
__log "${I}:mount (ntfs)"
;;
(*FAT*)
__create_mount_point ${I}
fsck_msdosfs -y ${I}
mount_msdosfs -o large -o longnames -l -L pl_PL.ISO8859-2 -D cp85=
2 ${I} ${MNT}
__log "${I}:mount (fat)"
;;
(*ext2*)
__create_mount_point ${I}
fsck.ext2 -y ${I}
mount -t ext2fs ${I} ${MNT}
__log "${I}:mount (ext2)"
;;
(*ext3*)
__create_mount_point ${I}
fsck.ext3 -y ${I}
mount -t ext2fs ${I} ${MNT}
__log "${I}:mount (ext3)"
;;
(*ext4*)
__create_mount_point ${I}
fsck.ext4 -y ${I}
ext4fuse ${I} ${MNT} # /* sysutils/fusefs-ext4fuse */
__log "${I}:mount (ext4)"
;;
(*Unix\ Fast\ File*)
__create_mount_point ${I}
fsck_ufs -y ${I}
mount ${I} ${MNT}
__log "${I}:mount (ufs)"
;;
(*)
case $( dd < ${O} count=3D1 | strings | head -1 ) in
(EXFAT)
__create_mount_point ${I}
mount.exfat ${I} ${MNT} # /* sysutils/fusefs-exfat */
__log "${I}:mount (ufs)"
;;
(*) continue ;;
esac
;;
esac
__state_add ${I} $( mount | grep " ${MNT} " | awk '{printf $1}' ) ${M=
NT} || continue
done
;;
(detach)
__state_lock
grep ${1} ${STATE} \
| while read DEV PROVIDER MNT
do
TARGET=3D$( mount | grep -E "^${PROVIDER} " | awk '{print $3}' )
[ -z ${TARGET} ] && {
__state_remove ${MNT} ${STATE} ${LINE}
continue
}
umount -f ${TARGET} &
unset TARGET
__state_remove ${MNT} ${STATE} ${LINE}
__log "${DEV}:umount"
done
__state_unlock
__log "/dev/${1}:detach"
;;
esac
I have made tests with 3 different USB drives, with different and same fail=
esystems, connecting them all at once, disconnecting all at once, random co=
nnect, disconnect etc.
Currently it seems to work ok but suggestions are very welcome.
> Some things to consider/test:
>=20
> How do I set custom flags, like nosuid,noatime,nodev,noexec,async (or
> sync) for mounts?
Currently You can add these options to filesystem specific mount command, b=
ut its definitely possible.
> What if make a usb drive with an illegal name, existing name or other dan=
gerous values?
The filesystem label is not used at all, I just use device names, which are=
reported by FreeBSD, so quite bulletproof here and then create appreciate =
/mnt/da0s1 directories.
> Can I use the automounter to either mount over another mount to
> impersonate it, or can I overwrite arbitrary files or directories?
I have done everything to check that and to omit that, if not, then submit =
a BUG ;)
Thanks for suggestions Matt.
Regards,
vermaden
--=20
...
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