Llewellyn/Tomb
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Merge pull request #24 from davinerd/feat_issue_21

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Feat issue 21
This commit is contained in:
(A)nathema 2011-08-18 09:49:38 -07:00
commit f76a355fd0
1 changed files with 118 additions and 65 deletions
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src/tomb
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@ -757,40 +757,101 @@ exec_safe_post_hooks() {
fi fi
} }
kill_tomb() {
# $1 = pids to kill
# $2 = type of kill
local e p
# substitute the \n with space
e=${1//$'\n'/ }
# split the string at space delim
# so we can get a for loop honestly
e=(${(s: :)e})
for p in $e; do
func "killing PID $p..."
if [[ "$2" == "soft" ]]; then
kill -USR1 $p
elif [[ "$2" == "hard" ]]; then
kill -TERM $p
elif [[ "$2" == "must die" ]]; then
kill -KILL $p
fi
done
}
slam_tomb() {
# $1 = tomb mount point
local pidk
pidk=`lsof -t "$1"`
if [[ ! -z "$pidk" ]]; then
kill_tomb "$pidk" "soft"
else
return 0
fi
# if there are remaining pids
# we need to play hard
pidk=`lsof -t "$1"`
if [[ -z "$pidk" ]]; then
return 0
fi
# if we set the -f (force) option
# don't wait, just kill
option_is_set -f || sleep 3
kill_tomb "$pidk" "hard"
pidk=`lsof -t "$1"`
if [[ -z "$pidk" ]]; then
return 0
fi
# if there are still some pids around
# we have to kill 'em all
option_is_set -f || sleep 3
kill_tomb "$pidk" "must die"
pidk=`lsof -t "$1"`
if [[ -z "$pidk" ]]; then
return 0
fi
# what PITA!
return 1
}
umount_tomb() { umount_tomb() {
local tombs how_many_tombs local tombs how_many_tombs
local pathmap mapper tombname tombmount loopdev local pathmap mapper tombname tombmount loopdev
local ans pidk pname local ans pidk pname
if ! [ $1 ]; then if ! [ $1 ]; then
tombs=`find /dev/mapper -name 'tomb.*'` tombs=`find /dev/mapper -name 'tomb.*'`
how_many_tombs=`wc -w <<< "$tombs"` how_many_tombs=`wc -w <<< "$tombs"`
if [ "$how_many_tombs" = "0" ]; then if [[ "$how_many_tombs" == "0" ]]; then
error "There is no open tomb to be closed" error "There is no open tomb to be closed"
return 1 return 1
elif [ "$how_many_tombs" = "1" ]; then elif [[ "$how_many_tombs" == "1" ]]; then
#mapper=`find /dev/mapper -name 'tomb.*'` #mapper=`find /dev/mapper -name 'tomb.*'`
func "closing mapper $tombs" func "closing mapper $tombs"
umount_tomb ${tombs} umount_tomb ${tombs}
return 1 return 1
else else
error "Too many tombs mounted, please specify which to unmount:" error "Too many tombs mounted, please specify which to unmount:"
ls /dev/mapper/tomb.* ls /dev/mapper/tomb.*
error "or issue the command 'tomb close all' to clos'em all." error "or issue the command 'tomb close all' to clos'em all."
return 1 return 1
fi fi
fi fi
if [ "$1" = "all" ]; then if [ "$1" = "all" ]; then
tombs=`find /dev/mapper -name 'tomb.*'` tombs=`find /dev/mapper -name 'tomb.*'`
if ! [ $tombs ]; then if ! [ $tombs ]; then
notice "Tombs are all closed, cemetery is quiet." notice "Tombs are all closed, cemetery is quiet."
return 0
fi
for t in ${(f)tombs}; do
umount_tomb ${t}
done
return 0 return 0
fi
for t in ${(f)tombs}; do
umount_tomb ${t}
done
return 0
fi fi
@ -798,26 +859,20 @@ umount_tomb() {
pathmap=`dirname "$1"` pathmap=`dirname "$1"`
if [ "${pathmap}" = "/dev/mapper" ]; then if [ "${pathmap}" = "/dev/mapper" ]; then
mapper="$1" # argument is the mapper (or none which autofills mapper)
mapper="$1" # argument is the mapper (or none which autofills mapper) tombname="`print $mapper | cut -d. -f2`"
tombname="`print $mapper | cut -d. -f2`" tombmount=`mount -l | \
tombmount=`mount -l | \
awk -vtomb="[$tombname]" '/^\/dev\/mapper\/tomb/ { if($7==tomb) print $3 } '` awk -vtomb="[$tombname]" '/^\/dev\/mapper\/tomb/ { if($7==tomb) print $3 } '`
elif [ "$pathmap" = "." ]; then elif [ "$pathmap" = "." ]; then
tombname="$1" # argument is the name
tombname="$1" # argument is the name mapper=`mount -l | \
mapper=`mount -l | \
awk -vtomb="[$tombname]" '/^\/dev\/mapper\/tomb/ { if($7==tomb) print $1 } '` awk -vtomb="[$tombname]" '/^\/dev\/mapper\/tomb/ { if($7==tomb) print $1 } '`
tombmount=`mount -l | \ tombmount=`mount -l | \
awk -vtomb="[$tombname]" '/^\/dev\/mapper\/tomb/ { if($7==tomb) print $3 } '` awk -vtomb="[$tombname]" '/^\/dev\/mapper\/tomb/ { if($7==tomb) print $3 } '`
else else
tombmount="$1" # argument should be the mount
tombmount="$1" # argument should be the mount
mapper=`mount | awk -vmnt="$tombmount" '/^\/dev\/mapper\/tomb/ { if($3==mnt) print $1 }'` mapper=`mount | awk -vmnt="$tombmount" '/^\/dev\/mapper\/tomb/ { if($3==mnt) print $1 }'`
tombname="`print $mapper | cut -d. -f2`" tombname="`print $mapper | cut -d. -f2`"
fi fi
# avoid block when the same tomb is mounted, take only the first # avoid block when the same tomb is mounted, take only the first
@ -835,45 +890,43 @@ umount_tomb() {
fi fi
if [ $SLAM ]; then if [ $SLAM ]; then
notice "Slamming tomb $tombname mounted on $tombmount" notice "Slamming tomb $tombname mounted on $tombmount"
act "Kill all processes busy inside the tomb" act "Kill all processes busy inside the tomb"
pidk=`lsof -t "$tombmount"` slam_tomb "$tombmount"
for p in "$pidk"; do if [[ $? == 1 ]]; then
pname=`pidof $p` error "Cannot slam the tomb $tombname"
func "killing PID $p of $pname..." return 1
kill -9 $p fi
done
else else
notice "Closing tomb $tombname mounted on $tombmount" notice "Closing tomb $tombname mounted on $tombmount"
fi fi
# check if there are binded dirs and close them # check if there are binded dirs and close them
tombmount_esc=`sed 's:\/:\\\/:g' <<< $tombmount ` tombmount_esc=`sed 's:\/:\\\/:g' <<< $tombmount `
unbind=`mount | awk "/^$tombmount_esc.*bind/"' { print $3 }'` unbind=`mount | awk "/^$tombmount_esc.*bind/"' { print $3 }'`
for b in ${(f)unbind}; do for b in ${(f)unbind}; do
hook="`basename $b`" hook="`basename $b`"
act "closing tomb hook: $hook" act "closing tomb hook: $hook"
umount $b umount $b
if ! [ $? = 0 ]; then if [[ $? != 0 ]]; then
if [ $SLAM ]; then if [ $SLAM ]; then
notice "Slamming tomb: killing all processes using this hook" notice "Slamming tomb: killing all processes using this hook"
pidk=`lsof -t $b` slam_tomb "$b"
for p in "$pidk"; do if [[ $? == 1 ]]; then
pname=`pidof $p` error "Cannot slam the tomb $b"
notice "Killing PID $p of $pname..." return 1
kill -9 $p fi
done umount $b
umount $b else
else error "Tomb hook is busy, cannot close tomb."
error "Tomb hook is busy, cannot close tomb." return 1
return 1 fi
fi fi
fi
done done
# Execute post-hooks for eventual cleanup # Execute post-hooks for eventual cleanup
if ! [ $NOBIND ]; then if ! [ $NOBIND ]; then
exec_safe_post_hooks ${tombmount%%/} close exec_safe_post_hooks ${tombmount%%/} close
fi fi
if [ $tombmount ]; then # tomb is actively mounted if [ $tombmount ]; then # tomb is actively mounted