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![Jan Janssen](/assets/img/avatar_default.png)
Hi, I redid the boot ID look up to use enumerate_unique. This is quite fast if the cache is warm but painfully slow if it isn't. It has a slight chance of returning the wrong order if realtime clock jumps around. This one has to do n searches for every boot ID there is plus a sort, so it depends heavily on cache hotness. This is in contrast to the other way of look-up through filtering by a MESSAGE_ID, which only needs about 1 seek + whatever amount of relative IDs you want to walk. I also have a linked-list + (in-place) mergesort version of this patch, which has pretty much the same runtime. But since this one is using libc sorting and armortized allocation, I prefer this one. To summarize: The MESSAGE_ID way is a *lot* faster but can be incomplete due to rotation, while the enumerate+sort will find every boot ID out there but will be painfully slow for large journals and cold caches. You choose :P Jan
110 lines
4.9 KiB
Bash
110 lines
4.9 KiB
Bash
# journalctl(1) completion -*- shell-script -*-
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#
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# This file is part of systemd.
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#
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# Copyright 2010 Ran Benita
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#
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# systemd is free software; you can redistribute it and/or modify it
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# under the terms of the GNU Lesser General Public License as published by
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# the Free Software Foundation; either version 2.1 of the License, or
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# (at your option) any later version.
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#
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# systemd is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public License
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# along with systemd; If not, see <http://www.gnu.org/licenses/>.
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__contains_word () {
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local word=$1; shift
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for w in $*; do [[ $w = $word ]] && return 0; done
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return 1
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}
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__journal_fields=(MESSAGE{,_ID} PRIORITY CODE_{FILE,LINE,FUNC}
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ERRNO SYSLOG_{FACILITY,IDENTIFIER,PID} COREDUMP_EXE
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_{P,U,G}ID _COMM _EXE _CMDLINE
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_AUDIT_{SESSION,LOGINUID}
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_SYSTEMD_{CGROUP,SESSION,UNIT,OWNER_UID}
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_SELINUX_CONTEXT _SOURCE_REALTIME_TIMESTAMP
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_{BOOT,MACHINE}_ID _HOSTNAME _TRANSPORT
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_KERNEL_{DEVICE,SUBSYSTEM}
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_UDEV_{SYSNAME,DEVNODE,DEVLINK}
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__CURSOR __{REALTIME,MONOTONIC}_TIMESTAMP)
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_journalctl() {
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local field_vals= cur=${COMP_WORDS[COMP_CWORD]} prev=${COMP_WORDS[COMP_CWORD-1]}
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local -A OPTS=(
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[STANDALONE]='-a --all --full --system --user
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--disk-usage -f --follow --header
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-h --help -l --local --new-id128 -m --merge --no-pager
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--no-tail -q --quiet --setup-keys --this-boot --verify
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--version --list-catalog --update-catalog'
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[ARG]='-b --boot --this-boot -D --directory -F --field
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-o --output -u --unit --user-unit'
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[ARGUNKNOWN]='-c --cursor --interval -n --lines -p --priority --since --until
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--verify-key'
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)
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if __contains_word "$prev" ${OPTS[ARG]} ${OPTS[ARGUNKNOWN]}; then
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case $prev in
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--boot|--this-boot|-b)
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comps=$(journalctl -F '_BOOT_ID' 2>/dev/null)
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;;
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--directory|-D)
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comps=$(compgen -d -- "$cur")
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compopt -o filenames
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;;
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--output|-o)
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comps='short short-monotonic verbose export json cat'
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;;
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--field|-F)
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comps=${__journal_fields[*]}
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;;
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--unit|-u)
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comps=$(journalctl -F '_SYSTEMD_UNIT' 2>/dev/null)
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;;
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--user-unit)
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comps=$(journalctl -F '_SYSTEMD_USER_UNIT' 2>/dev/null)
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;;
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*)
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return 0
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;;
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esac
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COMPREPLY=( $(compgen -W '$comps' -- "$cur") )
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return 0
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fi
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if [[ $cur = -* ]]; then
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COMPREPLY=( $(compgen -W '${OPTS[*]}' -- "$cur") )
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return 0
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elif [[ $cur = *=* ]]; then
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mapfile -t field_vals < <(journalctl -F "${prev%=}" 2>/dev/null)
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COMPREPLY=( $(compgen -W '${field_vals[*]}' -- "${cur#=}") )
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elif [[ $cur = /dev* ]]; then
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compopt -o filenames
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COMPREPLY=( $(compgen -f -- "${cur}") )
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elif [[ $cur = /* ]]; then
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# Append /dev/ to the list of completions, so that
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# after typing /<TAB><TAB> the user sees /dev/ as one
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# of the alternatives. Later on the rule above will
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# take care of showing device files in /dev/.
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mapfile -t field_vals < <(journalctl -F "_EXE" 2>/dev/null; echo '/dev/')
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COMPREPLY=( $(compgen -W '${field_vals[*]}' -- "${cur}") )
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if [[ "${COMPREPLY[@]}" = '/dev/' ]]; then
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compopt -o filenames
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COMPREPLY=( $(compgen -f -- "${cur}") )
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fi
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elif [[ $prev = '=' ]]; then
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mapfile -t field_vals < <(journalctl -F "${COMP_WORDS[COMP_CWORD-2]}" 2>/dev/null)
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COMPREPLY=( $(compgen -W '${field_vals[*]}' -- "$cur") )
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else
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compopt -o nospace
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COMPREPLY=( $(compgen -W '${__journal_fields[*]}' -S= -- "$cur") )
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fi
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}
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complete -F _journalctl journalctl
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