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May 21, 2014 11:58
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| #!/bin/sh | |
| # | |
| # lxc: linux Container library | |
| # This library is free software; you can redistribute it and/or | |
| # modify it under the terms of the GNU Lesser General Public | |
| # License as published by the Free Software Foundation; either | |
| # version 2.1 of the License, or (at your option) any later version. | |
| # This library is distributed in the hope that it will be useful, | |
| # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| # Lesser General Public License for more details. | |
| # You should have received a copy of the GNU Lesser General Public | |
| # License along with this library; if not, write to the Free Software | |
| # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| . /usr/share/lxc/lxc.functions | |
| usage() | |
| { | |
| echo "usage: $(basename $0) [-P PATH] [--lxc | --host | --name NAME] [[--] [PS_OPTIONS...]" >&2 | |
| } | |
| help() { | |
| usage | |
| echo >&2 | |
| echo "List current processes with container names." >&2 | |
| echo >&2 | |
| echo " --lxc show processes in all containers" >&2 | |
| echo " --host show processes not related to any container, i.e. to the host" >&2 | |
| echo " --name NAME show processes in the specified container" >&2 | |
| echo " (multiple containers can be separated by commas)" >&2 | |
| echo " -P PATH show container in lxcpath PATH" >&2 | |
| echo " PS_OPTIONS ps command options (see \`ps --help')" >&2 | |
| } | |
| get_parent_cgroup() | |
| { | |
| local hierarchies hierarchy fields init_cgroup mountpoint | |
| parent_cgroup="" | |
| subsystems="" | |
| # Obtain a list of hierarchies that contain one or more subsystems | |
| hierarchies=$(tail -n +2 /proc/cgroups | cut -f 2) | |
| # Iterate through the list until a suitable hierarchy is found | |
| for hierarchy in $hierarchies; do | |
| # Obtain information about the init process in the hierarchy | |
| fields=$(grep -E "^$hierarchy:" /proc/1/cgroup | head -n 1) | |
| if [ -z "$fields" ]; then continue; fi | |
| fields=${fields#*:} | |
| # Get a comma-separated list of the hierarchy's subsystems | |
| subsystems=${fields%:*} | |
| # Get the cgroup of the init process in the hierarchy | |
| init_cgroup=${fields#*:} | |
| # Get the filesystem mountpoint of the hierarchy | |
| mountpoint=$(awk -v subsysregex="(^|,)$subsystems(,|\$)" \ | |
| '$3 == "cgroup" && $4 ~ subsysregex {print $2}' /proc/self/mounts) | |
| if [ -z "$mountpoint" ]; then continue; fi | |
| # Return the absolute path to the containers' parent cgroup | |
| parent_cgroup="${mountpoint}${init_cgroup%/}"; | |
| break | |
| done | |
| } | |
| containers="" | |
| list_container_processes=0 | |
| while true; do | |
| case $1 in | |
| -h|--help) | |
| help; exit 1;; | |
| -n|--name) | |
| containers=$2; list_container_processes=1; shift 2;; | |
| --lxc) | |
| list_container_processes=1; shift;; | |
| --host) | |
| list_container_processes=-1; shift;; | |
| -P|--lxcpath) | |
| lxc_path=$2; shift 2;; | |
| --) | |
| shift; break;; | |
| *) | |
| break;; | |
| esac | |
| done | |
| if [ "$list_container_processes" -eq "1" ]; then | |
| set -- -e $@ | |
| fi | |
| get_parent_cgroup | |
| if [ ! -d "$parent_cgroup" ]; then | |
| echo "$(basename $0): no cgroup mount point found" >&2 | |
| exit 1 | |
| fi | |
| if [ -z "$containers" ]; then | |
| case ",$subsystems," in | |
| *,ns,*) containers="$(find $parent_cgroup -mindepth 1 -maxdepth 1 -type d 2>/dev/null | sed 's:.*/::')";; | |
| *) containers="$(find $parent_cgroup/lxc -mindepth 1 -maxdepth 1 -type d 2>/dev/null | sed 's:.*/::')";; | |
| esac | |
| fi | |
| container_field_width=9 | |
| tasks_files= | |
| for container in ${containers}; do | |
| if [ "${#container}" -gt "$container_field_width" ]; then | |
| container_field_width=${#container} | |
| fi | |
| if lxc-info -P $lxc_path -n $container | grep RUNNING > /dev/null ; then | |
| initpid=`lxc-info -P $lxc_path -p -n $container | awk -F: '{ print $2 }' | awk '{ print $1 }'` | |
| cgroup=`head -n 1 /proc/$initpid/cgroup | awk -F: '{ print $3}'` | |
| if [ -f "$parent_cgroup/$cgroup/tasks" ]; then | |
| tasks_files="$tasks_files $parent_cgroup$cgroup/tasks" | |
| fi | |
| fi | |
| done | |
| # first file is stdin, the rest are the container tasks | |
| ps "$@" | awk -v container_field_width="$container_field_width" \ | |
| -v list_container_processes="$list_container_processes" ' | |
| # first line is PS header | |
| NR == 1 { | |
| header = $0 | |
| # find pid field index | |
| for (i = 1; i<=NF; i++) | |
| if ($i == "PID") { | |
| pididx = i | |
| break | |
| } | |
| if (pididx == "") { | |
| print("No PID field found") > "/dev/stderr" | |
| header = "" # to signal error condition to the END rule | |
| exit 1 | |
| } | |
| next | |
| } | |
| # store lines from ps with pid as index | |
| NR == FNR { | |
| ps_line[NR] = $0 | |
| pid_of_line[NR] = $pididx | |
| next | |
| } | |
| # find container name from filename on first line | |
| FNR == 1 { | |
| container = FILENAME | |
| sub(/\/tasks/, "", container) | |
| sub(/.*\//, "", container) | |
| } | |
| # container tasks | |
| { | |
| container_of_pid[$0] = container | |
| } | |
| END { | |
| if (!header) exit 1 # quit due to internal error | |
| printf("%-" container_field_width "s %s\n", "CONTAINER", header) | |
| for (i in ps_line) { | |
| container = container_of_pid[pid_of_line[i]] | |
| if (list_container_processes == 0 || (container != "") == (list_container_processes > 0) ) | |
| printf("%-" container_field_width "s %s\n", container, ps_line[i]) | |
| } | |
| } | |
| ' - $tasks_files |
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