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+#compdef journalctl
+
+_list_fields() {
+ local -a journal_fields
+ journal_fields=(MESSAGE{,_ID} PRIORITY CODE_{FILE,LINE,FUNC}
+ ERRNO SYSLOG_{FACILITY,IDENTIFIER,PID}
+ _{P,U,G}ID _COMM _EXE _CMDLINE
+ _AUDIT_{SESSION,LOGINUID}
+ _SYSTEMD_{CGROUP,SESSION,UNIT,OWNER_UID}
+ _SYSTEMD_USER_UNIT USER_UNIT
+ _SELINUX_CONTEXT _SOURCE_REALTIME_TIMESTAMP
+ _{BOOT,MACHINE}_ID _HOSTNAME _TRANSPORT
+ _KERNEL_{DEVICE,SUBSYSTEM}
+ _UDEV_{SYSNAME,DEVNODE,DEVLINK}
+ __CURSOR __{REALTIME,MONOTONIC}_TIMESTAMP)
+ case $_jrnl_none in
+ yes) _values -s '=' 'possible fields' \
+ "${journal_fields[@]}:value:_journal_fields ${words[CURRENT]%%=*}" ;;
+ *) _describe 'possible fields' journal_fields ;;
+ esac
+}
+
+_journal_none() {
+ local -a _commands _files _jrnl_none
+ # Setting use-cache will slow this down considerably
+ _commands=( ${"$(_call_program commands "$service" -F _EXE 2>/dev/null)"} )
+ _jrnl_none='yes'
+ _alternative : \
+ 'files:/dev files:_files -W /dev -P /dev/' \
+ "commands:commands:($_commands[@])" \
+ 'fields:fields:_list_fields'
+}
+
+_journal_fields() {
+ local -a _fields cmd
+ cmd=("journalctl" "-F ${@[-1]}" "2>/dev/null" )
+ _fields=$(_call_program fields $cmd[@])
+ _fields=${_fields//'\'/'\\'}
+ _fields=${_fields//':'/'\:'}
+ _fields=( ${(f)_fields} )
+ typeset -U _fields
+ _describe 'possible values' _fields
+}
+
+_journal_boots() {
+ local -a _bootid _previousboots
+ _bootid=( ${(f)"$(_call_program bootid "$service -F _BOOT_ID")"} )
+ _previousboots=( -{1..${#_bootid}} )
+ _alternative : \
+ "offsets:boot offsets:compadd -a '_previousboots[1,-2]'" \
+ "bootid:boot ids:compadd -a _bootid"
+}
+
+_arguments -s \
+ {-h,--help}'[Show this help]' \
+ '--version[Show package version]' \
+ '--no-pager[Do not pipe output into a pager]' \
+ {-l,--full}'[Show long fields in full]' \
+ {-a,--all}'[Show all fields, including long and unprintable]' \
+ {-f,--follow}'[Follow journal]' \
+ {-e,--pager-end}'[Jump to the end of the journal in the pager]' \
+ {-n+,--lines=}'[Number of journal entries to show]:integer' \
+ '--no-tail[Show all lines, even in follow mode]' \
+ {-r,--reverse}'[Reverse output]' \
+ {-o+,--output=}'[Change journal output mode]:output modes:_sd_outputmodes' \
+ {-x,--catalog}'[Show explanatory texts with each log line]' \
+ {-q,--quiet}"[Don't show privilege warning]" \
+ {-m,--merge}'[Show entries from all available journals]' \
+ {-b+,--boot=}'[Show data only from the specified boot or offset]::boot id or offset:_journal_boots' \
+ '--list-boots[List boots ordered by time]' \
+ {-k,--dmesg}'[Show only kernel messages from the current boot]' \
+ {-u+,--unit=}'[Show data only from the specified unit]:units:_journal_fields _SYSTEMD_UNIT' \
+ '--user-unit=[Show data only from the specified user session unit]:units:_journal_fields USER_UNIT' \
+ {-p+,--priority=}'[Show only messages within the specified priority range]:priority:_journal_fields PRIORITY' \
+ {-t+,--identifier=}'[Show only messages with the specified syslog identifier]:identifier:_journal_fields SYSLOG_IDENTIFIER' \
+ {-c+,--cursor=}'[Start showing entries from the specified cursor]:cursors:_journal_fields __CURSORS' \
+ '--after-cursor=[Start showing entries from after the specified cursor]:cursors:_journal_fields __CURSORS' \
+ '--since=[Start showing entries on or newer than the specified date]:YYYY-MM-DD HH\:MM\:SS' \
+ '--until=[Stop showing entries on or older than the specified date]:YYYY-MM-DD HH\:MM\:SS' \
+ {-F,--field=}'[List all values a certain field takes]:Fields:_list_fields' \
+ '--system[Show system and kernel messages]' \
+ '--user[Show messages from user services]' \
+ {-M+,--machine=}'[Operate on local container]:machines:_sd_machines' \
+ {-D+,--directory=}'[Show journal files from directory]:directories:_directories' \
+ '--file=[Operate on specified journal files]:file:_files' \
+ '--root=[Operate on catalog hierarchy under specified directory]:directories:_directories' \
+ '--new-id128[Generate a new 128 Bit ID]' \
+ '--header[Show journal header information]' \
+ '--disk-usage[Show total disk usage]' \
+ '--list-catalog[List messages in catalog]' \
+ '--dump-catalog[Dump messages in catalog]' \
+ '--update-catalog[Update binary catalog database]' \
+ '--setup-keys[Generate a new FSS key pair]' \
+ '--force[Force recreation of the FSS keys]' \
+ '--interval=[Time interval for changing the FSS sealing key]:time interval' \
+ '--verify[Verify journal file consistency]' \
+ '--verify-key=[Specify FSS verification key]:FSS key' \
+ '*::default: _journal_none'