projects / mirror_lxc.git / blame
| Commit | Line | Data |
|---|---|---|
| 2f0e6908 | 1 | #!/bin/sh |
| 6a85cf91 SG |
2 | |
| 3 | # | |
| 4 | # lxc: linux Container library | |
| 5 | ||
| 6 | # This library is free software; you can redistribute it and/or | |
| 7 | # modify it under the terms of the GNU Lesser General Public | |
| 8 | # License as published by the Free Software Foundation; either | |
| 9 | # version 2.1 of the License, or (at your option) any later version. | |
| 10 | ||
| 11 | # This library is distributed in the hope that it will be useful, | |
| 12 | # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 14 | # Lesser General Public License for more details. | |
| 15 | ||
| 16 | # You should have received a copy of the GNU Lesser General Public | |
| 17 | # License along with this library; if not, write to the Free Software | |
| 250b1eec | 18 | # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 6a85cf91 | 19 | |
| 2a59a681 | 20 | . @DATADIR@/lxc/lxc.functions |
| 6a85cf91 SG |
21 | |
| 22 | usage() | |
| 23 | { | |
| 24 | echo "usage: $(basename $0) [--active] [--] [LS_OPTIONS...]" >&2 | |
| 25 | } | |
| 26 | ||
| 27 | help() { | |
| 28 | usage | |
| 29 | echo >&2 | |
| 30 | echo "List containers existing on the system." >&2 | |
| 31 | echo >&2 | |
| 32 | echo " --active list active containers" >&2 | |
| 33 | echo " LS_OPTIONS ls command options (see \`ls --help')" >&2 | |
| 34 | } | |
| 35 | ||
| 36 | get_parent_cgroup() | |
| 37 | { | |
| 6a85cf91 SG |
38 | parent_cgroup="" |
| 39 | ||
| 40 | # Obtain a list of hierarchies that contain one or more subsystems | |
| 41 | hierarchies=$(tail -n +2 /proc/cgroups | cut -f 2) | |
| 42 | ||
| 43 | # Iterate through the list until a suitable hierarchy is found | |
| 44 | for hierarchy in $hierarchies; do | |
| 45 | # Obtain information about the init process in the hierarchy | |
| 46 | fields=$(grep -E "^$hierarchy:" /proc/1/cgroup | head -n 1) | |
| 47 | if [ -z "$fields" ]; then continue; fi | |
| 48 | fields=${fields#*:} | |
| 49 | ||
| 50 | # Get a comma-separated list of the hierarchy's subsystems | |
| 51 | subsystems=${fields%:*} | |
| 52 | ||
| 53 | # Get the cgroup of the init process in the hierarchy | |
| 54 | init_cgroup=${fields#*:} | |
| 55 | ||
| 56 | # Get the filesystem mountpoint of the hierarchy | |
| 32e86901 NC |
57 | mountpoint=$(awk -v subsysregex="(^|,)$subsystems(,|\$)" \ |
| 58 | '$3 == "cgroup" && $4 ~ subsysregex {print $2}' /proc/self/mounts) | |
| 6a85cf91 SG |
59 | if [ -z "$mountpoint" ]; then continue; fi |
| 60 | ||
| 61 | # Return the absolute path to the containers' parent cgroup | |
| 62 | # (do not append '/lxc' if the hierarchy contains the 'ns' subsystem) | |
| 2f0e6908 NC |
63 | case ",$subsystems," in |
| 64 | *,ns,*) parent_cgroup="${mountpoint}${init_cgroup%/}";; | |
| 65 | *) parent_cgroup="${mountpoint}${init_cgroup%/}/lxc";; | |
| 66 | esac | |
| 6a85cf91 SG |
67 | break |
| 68 | done | |
| 69 | } | |
| 70 | ||
| 71 | directory=$(readlink -f "$lxc_path") | |
| 72 | ||
| 73 | for i in "$@"; do | |
| 74 | case $i in | |
| 75 | --help) | |
| 76 | help; exit;; | |
| 77 | --active) | |
| 78 | get_parent_cgroup; directory="$parent_cgroup"; shift;; | |
| 79 | --) | |
| 80 | shift; break;; | |
| 81 | *) | |
| 82 | break;; | |
| 2f0e6908 | 83 | esac |
| 6a85cf91 SG |
84 | done |
| 85 | ||
| 86 | containers="" | |
| 87 | if [ ! -z "$directory" ]; then | |
| f4031540 DE |
88 | if [ x"$parent_cgroup" = x ]; then |
| 89 | containers=$(find $directory -mindepth 2 -maxdepth 2 -name config -type f |awk -F "/" '{print $(NF-1)}') | |
| 90 | else | |
| 91 | containers=$(find $directory -mindepth 1 -maxdepth 1 -type d 2>/dev/null | sed 's:.*/::') | |
| 92 | fi | |
| 93 | if [ x"$containers" = x ]; then | |
| 94 | exit 0 | |
| 95 | fi | |
| 6a85cf91 SG |
96 | fi |
| 97 | ||
| 98 | cd "$directory" | |
| 99 | ls -d $@ -- $containers |