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diff --git a/src/grp-login/loginctl/loginctl.completion.zsh b/src/grp-login/loginctl/loginctl.completion.zsh
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+++ b/src/grp-login/loginctl/loginctl.completion.zsh
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+#compdef loginctl
+
+_loginctl_all_sessions() {
+ local session description
+ loginctl --no-legend list-sessions | while read -r session description; do
+ _sys_all_sessions+=( "$session" )
+ _sys_all_sessions_descr+=( "${session}:$description" )
+ done
+}
+
+_loginctl_all_users() {
+ local uid description
+ loginctl --no-legend list-users | while read -r uid description; do
+ _sys_all_users+=( "$uid" )
+ _sys_all_users_descr+=( "${uid}:$description" )
+ done
+}
+
+_loginctl_all_seats() {
+ local seat description
+ loginctl --no-legend list-seats | while read -r seat description; do
+ _sys_all_seats+=( "$seat" )
+ _sys_all_seats_descr+=( "${seat}:$description" )
+ done
+}
+
+local fun
+# Completion functions for SESSIONS
+for fun in session-status show-session activate lock-session unlock-session terminate-session kill-session ; do
+ (( $+functions[_loginctl_$fun] )) || _loginctl_$fun()
+ {
+ local -a _sys_all_sessions{,_descr}
+
+ _loginctl_all_sessions
+ for _ignore in $words[2,-1]; do
+ _sys_all_sessions[(i)$_ignore]=()
+ _sys_all_sessions_descr[(i)$_ignore:*]=()
+ done
+
+ if zstyle -T ":completion:${curcontext}:systemd-sessions" verbose; then
+ _describe -t systemd-sessions session _sys_all_sessions_descr _sys_all_sessions "$@"
+ else
+ local expl
+ _wanted systemd-sessions expl session compadd "$@" -a _sys_all_sessions
+ fi
+ }
+done
+
+# Completion functions for USERS
+for fun in user-status show-user enable-linger disable-linger terminate-user kill-user ; do
+ (( $+functions[_loginctl_$fun] )) || _loginctl_$fun()
+ {
+ local -a _sys_all_users{,_descr}
+ zstyle -a ":completion:${curcontext}:users" users _sys_all_users
+
+ if ! (( $#_sys_all_users )); then
+ _loginctl_all_users
+ fi
+
+ for _ignore in $words[2,-1]; do
+ _sys_all_users[(i)$_ignore]=()
+ _sys_all_users_descr[(i)$_ignore:*]=()
+ done
+
+ # using the common tag `users' here, not rolling our own `systemd-users' tag
+ if zstyle -T ":completion:${curcontext}:users" verbose; then
+ _describe -t users user ${_sys_all_users_descr:+_sys_all_users_descr} _sys_all_users "$@"
+ else
+ local expl
+ _wanted users expl user compadd "$@" -a _sys_all_users
+ fi
+ }
+done
+
+# Completion functions for SEATS
+(( $+functions[_loginctl_seats] )) || _loginctl_seats()
+{
+ local -a _sys_all_seats{,_descr}
+
+ _loginctl_all_seats
+ for _ignore in $words[2,-1]; do
+ _sys_all_seats[(i)$_ignore]=()
+ _sys_all_seats_descr[(i)$_ignore:*]=()
+ done
+
+ if zstyle -T ":completion:${curcontext}:systemd-seats" verbose; then
+ _describe -t systemd-seats seat _sys_all_seats_descr _sys_all_seats "$@"
+ else
+ local expl
+ _wanted systemd-seats expl seat compadd "$@" -a _sys_all_seats
+ fi
+}
+for fun in seat-status show-seat terminate-seat ; do
+ (( $+functions[_loginctl_$fun] )) || _loginctl_$fun()
+ { _loginctl_seats }
+done
+
+# Completion functions for ATTACH
+(( $+functions[_loginctl_attach] )) || _loginctl_attach()
+{
+ _arguments -w -C -S -s \
+ ':seat:_loginctl_seats' \
+ '*:device:_files'
+}
+
+# no loginctl completion for:
+# [STANDALONE]='list-sessions list-users list-seats flush-devices'
+
+(( $+functions[_loginctl_command] )) || _loginctl_command()
+{
+ local -a _loginctl_cmds
+ _loginctl_cmds=(
+ "list-sessions:List sessions"
+ "session-status:Show session status"
+ "show-session:Show properties of one or more sessions"
+ "activate:Activate a session"
+ "lock-session:Screen lock one or more sessions"
+ "unlock-session:Screen unlock one or more sessions"
+ "lock-sessions:Screen lock all current sessions"
+ "unlock-sessions:Screen unlock all current sessions"
+ "terminate-session:Terminate one or more sessions"
+ "kill-session:Send signal to processes of a session"
+ "list-users:List users"
+ "user-status:Show user status"
+ "show-user:Show properties of one or more users"
+ "enable-linger:Enable linger state of one or more users"
+ "disable-linger:Disable linger state of one or more users"
+ "terminate-user:Terminate all sessions of one or more users"
+ "kill-user:Send signal to processes of a user"
+ "list-seats:List seats"
+ "seat-status:Show seat status"
+ "show-seat:Show properties of one or more seats"
+ "attach:Attach one or more devices to a seat"
+ "flush-devices:Flush all device associations"
+ "terminate-seat:Terminate all sessions on one or more seats"
+ )
+
+ if (( CURRENT == 1 )); then
+ _describe -t commands 'loginctl command' _loginctl_cmds || compadd "$@"
+ else
+ local curcontext="$curcontext" _ignore
+
+ cmd="${${_loginctl_cmds[(r)$words[1]:*]%%:*}}"
+
+ if (( $#cmd )); then
+ curcontext="${curcontext%:*:*}:loginctl-${cmd}:"
+
+ _call_function ret _loginctl_$cmd || _message 'no more arguments'
+ else
+ _message "unknown loginctl command: $words[1]"
+ fi
+ return ret
+ fi
+}
+
+
+_arguments -s \
+ {-h,--help}'[Show help]' \
+ '--version[Show package version]' \
+ \*{-p+,--property=}'[Show only properties by this name]:unit property' \
+ {-a,--all}'[Show all properties, including empty ones]' \
+ '--kill-who=[Who to send signal to]:killwho:(main control all)' \
+ {-s+,--signal=}'[Which signal to send]:signal:_signals' \
+ {-H+,--host=}'[Operate on remote host]:userathost:_sd_hosts_or_user_at_host' \
+ {-M+,--machine=}'[Operate on local container]:machine:_sd_machines' \
+ {-l,--full}'[Do not ellipsize output]' \
+ '--no-pager[Do not pipe output into a pager]' \
+ '--no-legend[Do not show the headers and footers]' \
+ '--no-ask-password[Do not ask for system passwords]' \
+ {-n+,--lines=}'[Number of journal entries to show]' \
+ {-o+,--output=}'[Change journal output mode]:output modes:_sd_outputmodes' \
+ '*::loginctl command:_loginctl_command'