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slam_tomb: simplify and rename to _kill_processes
In general umount_tomb and slam_tomb shared a lot of similar code. Main difference being, that the latter additionally searched for processes and would still call umount_tomb if the processes could be killed. umount_tomb would then again search with the provided name for the relevant tomb in list_tomb_mounts, which should be obsolete at this point. Therefore the decision to reduce slam_tomb in functionality. It would only work on a supplied tombname and tombmount, look if there are processes and is called from within umount_tomb. (Theoretical tombname could be removed) Calling tomb with slam or close sets a flag, which will decide if that part in umount_tomb will be executed.
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Narrat
Jaromil
parent
284fb4a3cd
commit
653609a4b9
120
tomb
120
tomb
@ -64,6 +64,7 @@ typeset -i DECLOAKIFY=1
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typeset -i RESIZER=1
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typeset -i RECOLL=1
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typeset -i QRENCODE=1
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typeset -i LSOF=1
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# Default mount options
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typeset MOUNTOPTS="rw,noatime,nodev"
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@ -2961,8 +2962,18 @@ umount_tomb() {
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}
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}
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_message "Closing tomb ::1 tomb name:: mounted on ::2 mount point::" \
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# if SLAM is set kill possible processes
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[[ -v SLAM ]] && {
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_message "Slamming tomb ::1 tombname:: mounted on ::2 tombmount::" \
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${tombname} "${tombmount}"
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_kill_processes "$tombname" "$tombmount"
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[[ $? -ne 0 ]] && {
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_failure "Still active processes for ::1 tombname ::, cannot close tomb." "$tombname"
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}
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} || {
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_message "Closing tomb ::1 tomb name:: mounted on ::2 mount point::" \
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$tombname "$tombmount"
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}
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# check if there are bind mounted dirs and close them first
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# Can be due to bind-hooks or outside --bind mounts
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@ -3006,12 +3017,12 @@ list_processes() {
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# runs lsof on the mounted_tombs
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local mounted_tombs i indicator lsofres
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indicator=1 # != 0 means there were processes
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mounted_tombs=(`list_tomb_mounts $1`)
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mounted_tombs=(`list_tomb_mounts ${1//[\[\]]/}`) # remove possible []
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if [[ "${#mounted_tombs}" -gt 0 ]]; then
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if [[ -z $1 ]]; then
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_success "Looking for processes running inside all open tombs..."
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_message "Looking for processes running inside all open tombs..."
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else
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_success "Looking for processes running inside tomb '::1 tombname::'..." "$1"
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_message "Looking for processes running inside tomb ::1 tombname::..." "$1"
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fi
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for i in ${mounted_tombs}; do
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@ -3024,61 +3035,45 @@ list_processes() {
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return $indicator
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}
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# Kill all processes using the tomb
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slam_tomb() {
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# $1 = (optional) name of tomb to slam, or "all" if more mounted
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if [ "$1" = "all" ]; then
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mounted_tombs=(`list_tomb_mounts`)
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else
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mounted_tombs=(`list_tomb_mounts $1`)
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fi
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[[ ${#mounted_tombs} == 0 ]] && {
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_failure "There is no open tomb to be closed." }
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[[ ${#mounted_tombs} -gt 1 && -z "$1" ]] && {
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_warning "Too many tombs mounted, please specify one (see tomb list)"
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_warning "or issue the command 'tomb close all' to close them all."
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_failure "Operation aborted." }
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# Kill all processes using the specified tomb
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_kill_processes() {
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# $1 = name of tomb to slam
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# $2 = mount location of tomb
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[[ -z "$2" ]] && _failure "Missing arguments for slamming."
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local pnum result lsofres
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result=0
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# iterate through all mounted tomb affected
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for i in ${mounted_tombs}; do
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tombname=${i[(ws:;:)5]}
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tombmount="${i[(ws:;:)2]}"
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_success "Slamming tomb ::1 tombname:: mounted on ::2 tombmount::" \
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${tombname} "${tombmount}"
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list_processes "${tombname:1:-1}"
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[[ $? -eq 0 ]] && {
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# iterate through 3 different signals, break on success
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for s in TERM HUP KILL; do
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lsofres=(`_sudo lsof -t +D "$tombmount"`)
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[[ -n $lsofres ]] && {
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# iterate through all processes before switching signals
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for pnum in $lsofres; do
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_message "::1 tombname:: sending ::2 sig:: to open process ::3 pnum::" \
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${tombname} ${s} ${pnum}
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_sudo kill -$s $pnum
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done
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} || { break }
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# give some time to the process for a clean quit
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sleep .5
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done
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}
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# if there are still processes then signal failure
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lsofres=(`_sudo lsof -t +D "$tombmount"`)
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[[ -n $lsofres ]] && {
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for pnum in $lsofres; do
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_warning "Couldn't kill ::1 pnum::" $pnum
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done
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result=1
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}
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# if it failed killing a process, report it
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[[ $result = 0 ]] && umount_tomb "${tombname:1:-1}"
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done
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_verbose "::1 tombname:: Determining if there are open processes that needs killing" "$1"
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list_processes "$1"
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[[ $? -eq 0 ]] && {
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_verbose "Found open processes in ::1 tombname::" "$1"
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# iterate through 3 different signals, break on success
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for s in TERM HUP KILL; do
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lsofres=(`_sudo lsof -t +D "$2"`)
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[[ -n $lsofres ]] && {
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# iterate through all processes before switching signals
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for pnum in $lsofres; do
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_message "::1 tombname:: sending ::2 sig:: to open process ::3 pnum::" \
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${1} ${s} ${pnum}
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_sudo kill -$s $pnum
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done
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} || { break }
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# give some time to the process for a clean quit
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sleep .5
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done
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}
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# if there are still processes then signal failure
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lsofres=(`_sudo lsof -t +D "$tombmount"`)
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[[ -n $lsofres ]] && {
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_verbose "Verify that no open processes remain in ::1 tombname::" "$1"
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for pnum in $lsofres; do
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_warning "Couldn't kill ::1 pnum::" $pnum
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done
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result=1
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}
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return $result
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}
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@ -3293,18 +3288,15 @@ main() {
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# Slam a tomb killing all processes running inside
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slam)
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slam_tomb $PARAM[1]
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;;
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[[ $LSOF -eq 1 ]] && {
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SLAM=1
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} || {
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_warning "lsof not installed: cannot slam tombs."
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_warning "Trying a regular close."}
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;&
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# Close the tomb
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# `slam` is used to force closing.
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umount|close)
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[[ "$subcommand" == "slam" ]] && {
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SLAM=1
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[[ $LSOF == 0 ]] && {
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unset SLAM
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_warning "lsof not installed: cannot slam tombs."
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_warning "Trying a regular close." }}
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umount_tomb $PARAM[1]
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;;
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