Hi Chet,
Chet Ramey <chet.ra...@case.edu> writes:
> Which version?
This was from bash devel branch, commit hash
2e01122fe78eb5a42c9b9f3ca46b91f895959675.
Built with:
./configure CFLAGS='-fsanitize=undefined'
> Why? 0 is a valid index. set_word_top increments word_top before assigning
> to word_lineno[word_top].
Ah, okay. I see what you mean.
> I suspect there is a decrement that isn't matched by a call to
> set_word_top(). But a reproducer would help, otherwise we're all just
> guessing.
Sure, the bad read was happening while reading my .profile and .bashrc
file. I've narrowed it down to a bash completion file installed by my
system packages. I've attached it to this message.
Running:
./bash --norc ovs-vsctl-bashcomp.bash
triggers the out of bounds read.
SAVE_IFS=$IFS
IFS="
"
_OVSDB_SERVER_LOCATION=""
# Run ovs-vsctl and make sure that ovs-vsctl is always called with
# the correct --db argument.
_ovs_vsctl () {
local _db
if [ -n "$_OVSDB_SERVER_LOCATION" ]; then
_db="--db=$_OVSDB_SERVER_LOCATION"
fi
ovs-vsctl ${_db} "$@"
}
# ovs-vsctl --commands outputs in this format:
#
# main = <localopts>,<name>,<options>
# localopts = ([<localopt>] )*
# localopt = --[^]]*
# name = [^,]*
# arguments = ((!argument|?argument|*argument|+argument) )*
# argument = ([^ ]*|argument\|argument)
#
# The [] characters in local options are just delimiters. The
# argument prefixes mean:
# !argument :: The argument is required
# ?argument :: The argument is optional
# *argument :: The argument may appear any number (0 or more) times
# +argument :: The argument may appear one or more times
# A bar (|) character in an argument means thing before bar OR thing
# after bar; for example, del-port can take a port or an interface.
_OVS_VSCTL_COMMANDS="$(_ovs_vsctl --commands)"
# This doesn't complete on short arguments, so it filters them out.
_OVS_VSCTL_OPTIONS="$(_ovs_vsctl --options | awk '/^--/ { print $0 }' \
| sed -e 's/\(.*\)=ARG/\1=/')"
IFS=$SAVE_IFS
declare -A _OVS_VSCTL_PARSED_ARGS
declare -A _OVS_VSCTL_NEW_RECORDS
# This is a convenience function to make sure that user input is
# looked at as a fixed string when being compared to something. $1 is
# the input; this behaves like 'grep "^$1"' but deals with regex
# metacharacters in $1.
_ovs_vsctl_check_startswith_string () {
awk 'thearg == "" || index($0, thearg)==1' thearg="$1"
}
# $1 = word to complete on.
# Complete on global options.
_ovs_vsctl_bashcomp_globalopt () {
local options result
options=""
result=$(printf "%s\n" "${_OVS_VSCTL_OPTIONS}" \
| _ovs_vsctl_check_startswith_string "${1%=*}")
if [[ $result =~ "=" ]]; then
options="NOSPACE"
fi
printf -- "${options}\nEO\n${result}"
}
# $1 = word to complete on.
# Complete on local options.
_ovs_vsctl_bashcomp_localopt () {
local options result possible_opts
possible_opts=$(printf "%s\n" "${_OVS_VSCTL_COMMANDS}" | cut -f1 -d',')
# This finds all options that could go together with the
# already-seen ones
for prefix_arg in $1; do
possible_opts=$(printf "%s\n" "$possible_opts" \
| grep -- "\[${prefix_arg%%=*}=\?\]")
done
result=$(printf "%s\n" "${possible_opts}" \
| tr ' ' '\n' | tr -s '\n' | sort | uniq)
# This removes the already-seen options from the list so that
# users aren't completed for the same option twice.
for prefix_arg in $1; do
result=$(printf "%s\n" "${result}" \
| grep -v -- "\[${prefix_arg%%=*}=\?\]")
done
result=$(printf "%s\n" "${result}" | sed -ne 's/\[\(.*\)\]/\1/p' \
| _ovs_vsctl_check_startswith_string "$2")
if [[ $result =~ "=" ]]; then
options="NOSPACE"
fi
printf -- "${options}\nEO\n${result}"
}
# $1 = given local options.
# $2 = word to complete on.
# Complete on command that could contain the given local options.
_ovs_vsctl_bashcomp_command () {
local result possible_cmds
possible_cmds=$(printf "%s\n" "${_OVS_VSCTL_COMMANDS}")
for prefix_arg in $1; do
possible_cmds=$(printf "%s\n" "$possible_cmds" \
| grep -- "\[$prefix_arg=\?\]")
done
result=$(printf "%s\n" "${possible_cmds}" \
| cut -f2 -d',' \
| _ovs_vsctl_check_startswith_string "$2")
printf -- "${result}"
}
# $1 = completion result to check.
# Return 0 if the completion result is non-empty, otherwise return 1.
_ovs_vsctl_detect_nonzero_completions () {
local tmp newarg
newarg=${1#*EO}
readarray tmp <<< "$newarg"
if [ "${#tmp[@]}" -eq 1 ] && [ "${#newarg}" -eq 0 ]; then
return 1
fi
return 0
}
# $1 = argument format to expand.
# Expand '+ARGUMENT' in argument format to '!ARGUMENT *ARGUMENT'.
_ovs_vsctl_expand_command () {
result=$(printf "%s\n" "${_OVS_VSCTL_COMMANDS}" \
| grep -- ",$1," | cut -f3 -d',' | tr ' ' '\n' \
| awk '/\+.*/ { name=substr($0,2);
print "!"name; print "*"name; next; }
1')
printf -- "${result}\n!--"
}
# $1 = word to complete on.
# Complete on table.
_ovs_vsctl_complete_table () {
local result
result=$(ovsdb-client --no-heading list-tables $_OVSDB_SERVER_LOCATION
Open_vSwitch \
| _ovs_vsctl_check_startswith_string "$1")
printf -- "EO\n%s\n" "${result}"
}
# $1 = word to complete on.
# Complete on record. Provide both the name and uuid.
_ovs_vsctl_complete_record () {
local table uuids names new_record
table="${_OVS_VSCTL_PARSED_ARGS[TABLE]}"
new_record="${_OVS_VSCTL_NEW_RECORDS[${table^^}]}"
# Tables should always have an _uuid column
uuids=$(_ovs_vsctl --no-heading -f table -d bare --columns=_uuid \
list $table | _ovs_vsctl_check_startswith_string "$1")
# Names don't always exist, silently ignore if the name column is
# unavailable.
names=$(_ovs_vsctl --no-heading -f table -d bare \
--columns=name list $table \
2>/dev/null \
| _ovs_vsctl_check_startswith_string "$1")
printf -- "EO\n%s\n%s\n%s\n" "${uuids}" "${names}" "${new_record}"
}
# $1 = word to complete on.
# Complete on bridge.
_ovs_vsctl_complete_bridge () {
local result
result=$(_ovs_vsctl list-br | _ovs_vsctl_check_startswith_string "$1")
printf -- "EO\n%s\n" "${result}"
}
# $1 = word to complete on.
# Complete on port. If a bridge has already been specified,
# just complete for that bridge.
_ovs_vsctl_complete_port () {
local ports result
if [ -n "${_OVS_VSCTL_PARSED_ARGS[BRIDGE]}" ]; then
ports=$(_ovs_vsctl list-ports "${_OVS_VSCTL_PARSED_ARGS[BRIDGE]}")
else
local all_ports
all_ports=$(_ovs_vsctl --format=table \
--no-headings \
--columns=name \
list Port)
ports=$(printf "$all_ports" | tr -d '" ' | sort -u)
fi
result=$(_ovs_vsctl_check_startswith_string "$1" <<< "$ports")
printf -- "EO\n%s\n" "${result}"
}
# $1: Atom to complete (as usual)
# $2: Table to complete the key in
# $3: Column to find keys in
# $4: Prefix for each completion
# Complete on key based on given table and column info.
_ovs_vsctl_complete_key_given_table_column () {
local keys
keys=$(_ovs_vsctl --no-heading --columns="$3" list \
"$2" \
| tr -d '{\"}' | tr -s ', ' '\n' | cut -d'=' -f1 \
| xargs printf "$4%s\n" | _ovs_vsctl_check_startswith_string "$4$1")
result="${keys}"
printf -- "%s\n" "${result}"
}
# $1 = word to complete on.
# Complete on key.
__complete_key () {
# KEY is used in both br-set-external-id/br-get-external id (in
# which case it is implicitly a key in the external-id column) and
# in remove, where it is a table key. This checks to see if table
# is set (the remove scenario), and then decides what to do.
local result
if [ -n "${_OVS_VSCTL_PARSED_ARGS[TABLE]}" ]; then
local column=$(tr -d '\n' <<< ${_OVS_VSCTL_PARSED_ARGS["COLUMN"]})
result=$(_ovs_vsctl_complete_key_given_table_column \
"$1" \
${_OVS_VSCTL_PARSED_ARGS["TABLE"]} \
$column \
"")
else
result=$(_ovs_vsctl br-get-external-id \
${_OVS_VSCTL_PARSED_ARGS["BRIDGE"]} \
| cut -d'=' -f1 | _ovs_vsctl_check_startswith_string "$1")
fi
printf -- "%s" "${result}"
}
# $1 = word to complete on.
# Complete on key.
_ovs_vsctl_complete_key () {
# KEY is used in both br-set-external-id/br-get-external id (in
# which case it is implicitly a key in the external-id column) and
# in remove, where it is a table key. This checks to see if table
# is set (the remove scenario), and then decides what to do.
local result
result="$(__complete_key $1)"
# If result is empty, just use user input as result.
if [ -z "$result" ]; then
result=$1
fi
printf -- "EO\n%s\n" "${result}"
}
# $1 = word to complete on.
# Complete on value.
_ovs_vsctl_complete_value () {
local result
# Just use user input as result.
result=$1
printf -- "EO\n%s\n" "${result}"
}
# $1 = word to complete on.
# Complete on key=value.
_ovs_vsctl_complete_key_value () {
local orig_completions new_completions
orig_completions=$(__complete_key "$1")
for completion in ${orig_completions#*EO}; do
new_completions="${new_completions} ${completion}="
done
# If 'new_completions' is empty, just use user input as result.
if [ -z "$new_completions" ]; then
new_completions=$1
fi
printf -- "NOSPACE\nEO\n%s" "${new_completions}"
}
# $1 = word to complete on.
# Complete on column.
_ovs_vsctl_complete_column () {
local columns result
columns=$(ovsdb-client --no-headings list-columns $_OVSDB_SERVER_LOCATION \
Open_vSwitch ${_OVS_VSCTL_PARSED_ARGS["TABLE"]})
result=$(printf "%s\n" "${columns}" \
| tr -d ':' | cut -d' ' -f1 \
| _ovs_vsctl_check_startswith_string "$1" | sort | uniq)
printf -- "EO\n%s\n" "${result}"
}
# Extract all system interfaces.
_ovs_vsctl_get_sys_intf () {
local result
case "$(uname -o)" in
*Linux*)
result=$(ip -o link 2>/dev/null | cut -d':' -f2 \
| sed -e 's/^ \(.*\)/\1/')
;;
*)
result=$(ifconfig -a -s 2>/dev/null | cut -f1 -d' ' | tail -n +2)
;;
esac
printf "%s\n" "${result}"
}
# $1 = word to complete on.
# Complete on system interface.
_ovs_vsctl_complete_sysiface () {
local result
result=$(_ovs_vsctl_get_sys_intf | _ovs_vsctl_check_startswith_string "$1")
printf -- "EO\n%s\n" "${result}"
}
# $1 = word to complete on.
# Complete on interface. If a bridge has already been specified,
# just complete for that bridge.
_ovs_vsctl_complete_iface () {
local result
if [ -n "${_OVS_VSCTL_PARSED_ARGS[BRIDGE]}" ]; then
result=$(_ovs_vsctl list-ifaces "${_OVS_VSCTL_PARSED_ARGS[BRIDGE]}")
else
for bridge in $(_ovs_vsctl list-br); do
local ifaces
ifaces=$(_ovs_vsctl list-ifaces "${bridge}")
result="${result} ${ifaces}"
done
fi
printf "EO\n%s\n" "${result}"
}
# $1 = word to complete on.
# Complete on COLUMN?:KEY=VALUE.
_ovs_vsctl_complete_column_optkey_value () {
local result column key value completion
column=$(printf "%s\n" "$1" | cut -d '=' -f1 | cut -d':' -f1)
key=$(printf "%s\n" "$1" | cut -d '=' -f1 | cut -s -d':' -f2)
# The tr -d '\n' <<< makes sure that there are no leading or
# trailing accidental newlines.
table=$(tr -d '\n' <<< ${_OVS_VSCTL_PARSED_ARGS["TABLE"]})
# This might also be called after add-port or add-bond; in those
# cases, the table should implicitly be assumed to be "Port".
# This is done by checking if a NEW- parameter has been
# encountered and, if it has, using that type without the NEW- as
# the table.
if [ -z "$table" ]; then
if [ -n ${_OVS_VSCTL_PARSED_ARGS["NEW-PORT"]} ] \
|| [ -n ${_OVS_VSCTL_PARSED_ARGS["NEW-BOND-PORT"]} ]; then
table="Port"
fi
fi
if [ -z "$key" ]; then
local columns=$(ovsdb-client --no-headings list-columns \
$_OVSDB_SERVER_LOCATION Open_vSwitch $table)
result=$(printf "%s\n" "${columns}" \
| awk '/key.*value/ { print $1":"; next }
{ print $1; next }' \
| _ovs_vsctl_check_startswith_string "$1" | sort | uniq)
fi
if [[ $1 =~ ":" ]]; then
result=$(_ovs_vsctl_complete_key_given_table_column \
"$key" "$table" "$column" "$column:")
fi
# If result is empty, just use user input as result.
if [ -z "$result" ]; then
result=$1
fi
printf -- "NOSPACE\nEO\n%s\n" "${result}"
}
# $1 = word to complete on.
# Complete on filename.
_ovs_vsctl_complete_filename () {
local result
result=$(compgen -o filenames -A file "$1")
printf -- "EO\n%s\n" "${result}"
}
_ovs_vsctl_complete_bridge_fail_mode () {
printf -- "EO\nstandalone\nsecure"
}
# $1 = word to complete on.
# Complete on target.
_ovs_vsctl_complete_target () {
local result
if [[ "$1" =~ ^p?u ]]; then
local protocol pathname expansion_base result
protocol=$(cut -d':' -f1 <<< "$1")
pathname=$(cut -s -d':' -f2 <<< "$1")
expansion_base=$(compgen -W "unix punix" "$protocol")
expansion_base="$expansion_base:"
result=$(compgen -o filenames -A file \
-P $expansion_base "${pathname}")
printf -- "NOSPACE\nEO\n%s\n" "${result}"
else
printf -- "NOSPACE\nEO\nssl:\ntcp:\nunix:\npssl:\nptcp:\npunix:"
fi
}
# Extract PS1 prompt.
_ovs_vsctl_get_PS1 () {
if [ "$test" = "true" ]; then
printf -- "> "
return;
fi
# On Bash 4.4+ just use the @P expansion
if ((BASH_VERSINFO[0] > 4 ||
(BASH_VERSINFO[0] == 4 && BASH_VERSINFO[1] >= 4))); then
printf '%s\n' "${PS1@P}"
return
fi
# Original inspiration from
# http://stackoverflow.com/questions/10060500/bash-how-to-evaluate-ps1-ps2,
# but changed quite a lot to make it more robust.
# Make sure the PS1 used doesn't include any of the special
# strings used to identify the prompt
myPS1="$(sed 's/Begin prompt/\\Begin prompt/; s/End prompt/\\End prompt/'
<<< "$PS1")"
# Export the current environment in case the prompt uses any
vars="$(env | cut -d'=' -f1)"
for var in $vars; do export $var; done
funcs="$(declare -F | cut -d' ' -f3)"
for func in $funcs; do export -f $func; done
# Get the prompt
v="$(bash --norc --noprofile -i 2>&1 <<< $'PS1=\"'"$myPS1"$'\" \n# Begin
prompt\n# End prompt')"
v="${v##*# Begin prompt}"
printf -- "$(tail -n +2 <<< "${v%# End prompt*}" | sed 's/\\Begin
prompt/Begin prompt/; s/\\End prompt/End prompt/')"
}
# Request a new value from user. Nothing to complete on.
_ovs_vsctl_complete_new () {
local two_word_type message result
if [ ! "$1" = "--" ]; then
two_word_type="${2/-/ }"
message="\nEnter a ${two_word_type,,}:\n$(_ovs_vsctl_get_PS1)$COMP_LINE"
if [ -n "$1" ]; then
result="$1"
fi
printf -- "NOCOMP\nBM%sEM\nEO\n%s\n" "${message}" "${result}"
fi
}
_ovs_vsctl_complete_dashdash () {
printf -- "EO\n%s\n" "--"
}
# These functions are given two arguments:
#
# $1 is the word being completed
#
# $2 is the type of completion --- only currently useful for the
# NEW-* functions.
#
# Note that the NEW-* functions actually are ``completed''; currently
# the completions are just used to save the fact that they have
# appeared for later use (i.e. implicit table calculation).
#
# The output is of the form <options>EO<completions>, where EO stands
# for end options. Currently available options are:
# - NOSPACE: Do not add a space at the end of each completion
# - NOCOMP: Do not complete, but store the output of the completion
# func in _OVS_VSCTL_PARSED_ARGS for later usage.
# - BM<message>EM: Print the <message>
declare -A _OVS_VSCTL_ARG_COMPLETION_FUNCS=(
["TABLE"]=_ovs_vsctl_complete_table
["RECORD"]=_ovs_vsctl_complete_record
["BRIDGE"]=_ovs_vsctl_complete_bridge
["PARENT"]=_ovs_vsctl_complete_bridge
["PORT"]=_ovs_vsctl_complete_port
["KEY"]=_ovs_vsctl_complete_key
["VALUE"]=_ovs_vsctl_complete_value
["ARG"]=_ovs_vsctl_complete_value
["IFACE"]=_ovs_vsctl_complete_iface
["SYSIFACE"]=_ovs_vsctl_complete_sysiface
["COLUMN"]=_ovs_vsctl_complete_column
["COLUMN?:KEY"]=_ovs_vsctl_complete_column_optkey_value
["COLUMN?:KEY=VALUE"]=_ovs_vsctl_complete_column_optkey_value
["KEY=VALUE"]=_ovs_vsctl_complete_key_value
["?KEY=VALUE"]=_ovs_vsctl_complete_key_value
["PRIVATE-KEY"]=_ovs_vsctl_complete_filename
["CERTIFICATE"]=_ovs_vsctl_complete_filename
["CA-CERT"]=_ovs_vsctl_complete_filename
["MODE"]=_ovs_vsctl_complete_bridge_fail_mode
["TARGET"]=_ovs_vsctl_complete_target
["NEW-BRIDGE"]=_ovs_vsctl_complete_new
["NEW-PORT"]=_ovs_vsctl_complete_new
["NEW-BOND-PORT"]=_ovs_vsctl_complete_new
["NEW-VLAN"]=_ovs_vsctl_complete_new
["--"]=_ovs_vsctl_complete_dashdash
)
# $1: Argument type, may include vertical bars to mean OR
# $2: Beginning of completion
#
# Note that this checks for existance in
# _OVS_VSCTL_ARG_COMPLETION_FUNCS; if the argument type ($1) is not
# there it will fail gracefully.
_ovs_vsctl_possible_completions_of_argument () {
local possible_types completions tmp
completions="EO"
possible_types=$(printf "%s\n" "$1" | tr '|' '\n')
for type in $possible_types; do
if [ ${_OVS_VSCTL_ARG_COMPLETION_FUNCS["${type^^}"]} ]; then
tmp=$(${_OVS_VSCTL_ARG_COMPLETION_FUNCS["${type^^}"]} \
"$2" "${type^^}")
tmp_noEO="${tmp#*EO}"
tmp_EO="${tmp%%EO*}"
completions=$(printf "%s%s\n%s" "${tmp_EO}" \
"${completions}" "${tmp_noEO}")
fi
done
printf "%s\n" "${completions}"
}
# $1 = List of argument types
# $2 = current pointer into said list
# $3 = word to complete on
# Outputs list of possible completions
# The return value is the index in the cmd_args($1) list that should
# next be matched, if only one of them did, or 254 if there are no
# matches, so it doesn't know what comes next.
_ovs_vsctl_complete_argument() {
local cmd_args arg expansion index
new=$(printf "%s\n" "$1" | grep -- '.\+')
readarray -t cmd_args <<< "$new";
arg=${cmd_args[$2]}
case ${arg:0:1} in
!)
expansion=$(_ovs_vsctl_possible_completions_of_argument \
"${arg:1}" $3)
index=$(($2+1))
;;
\?|\*)
local tmp1 tmp2 arg2_index tmp2_noEO tmp2_EO
tmp1=$(_ovs_vsctl_possible_completions_of_argument "${arg:1}" $3)
tmp2=$(_ovs_vsctl_complete_argument "$1" "$(($2+1))" "$3")
arg2_index=$?
if _ovs_vsctl_detect_nonzero_completions "$tmp1" \
&& _ovs_vsctl_detect_nonzero_completions "$tmp2"; then
if [ "${arg:0:1}" = "*" ]; then
index=$2;
else
index=$(($2+1));
fi
fi
if _ovs_vsctl_detect_nonzero_completions "$tmp1" \
&& (! _ovs_vsctl_detect_nonzero_completions "$tmp2"); then
if [ "${arg:0:1}" = "*" ]; then
index=$2;
else
index=$(($2+1));
fi
fi
if (! _ovs_vsctl_detect_nonzero_completions "$tmp1") \
&& _ovs_vsctl_detect_nonzero_completions "$tmp2"; then
index=$arg2_index
fi
if (! _ovs_vsctl_detect_nonzero_completions "$tmp1") \
&& (! _ovs_vsctl_detect_nonzero_completions "$tmp2"); then
index=254
fi
# Don't allow secondary completions to inhibit primary
# completions:
if [[ $tmp2 =~ ^([^E]|E[^O])*NOCOMP ]]; then
tmp2=""
fi
tmp2_noEO="${tmp2#*EO}"
tmp2_EO="${tmp2%%EO*}"
expansion=$(printf "%s%s\n%s" "${tmp2_EO}" \
"${tmp1}" "${tmp2_noEO}")
;;
esac
printf "%s\n" "$expansion"
return $index
}
_ovs_vsctl_detect_nospace () {
if [[ $1 =~ ^([^E]|E[^O])*NOSPACE ]]; then
_OVS_VSCTL_COMP_NOSPACE=true
fi
}
_ovs_vsctl_process_messages () {
local message
message="${1#*BM}"
message="${message%%EM*}"
if [ "$test" = "true" ]; then
printf -- "--- BEGIN MESSAGE"
fi
printf "${message}"
if [ "$test" = "true" ]; then
printf -- "--- END MESSAGE"
fi
}
# colon, equal sign will mess up the completion output, just
# removes the colon-word and equal-word prefix from COMPREPLY items.
#
# Implementation of this function refers to the __ltrim_colon_completions
# function defined in bash_completion module.
#
# $1: Current argument
# $2: $COMP_WORDBREAKS
# $3: ${COMPREPLY[@]}
_ovs_vsctl_trim_compreply() {
local cur comp_wordbreaks
local compreply
cur=$1 && shift
comp_wordbreaks=$1 && shift
compreply=( $@ )
if [[ "$cur" == *:* && "$comp_wordbreaks" == *:* ]]; then
local colon_word=${cur%${cur##*:}}
local i=${#compreply[*]}
cur=${cur##*:}
while [ $((--i)) -ge 0 ]; do
compreply[$i]=${compreply[$i]#"$colon_word"}
done
fi
if [[ "$cur" == *=* && "$comp_wordbreaks" == *=* ]]; then
local equal_word=${cur%${cur##*=}}
local i=${#compreply[*]}
while [ $((--i)) -ge 0 ]; do
compreply[$i]=${compreply[$i]#"$equal_word"}
done
fi
printf "%s " "${compreply[@]}"
}
# The general strategy here is that the same functions that decide
# completions can also capture the necessary context for later
# completions. This means that there is no distinction between the
# processing for words that are not the current word and words that
# are the current word.
#
# Parsing up until the command word happens starts with everything
# valid; as the syntax order of ovs-vsctl is fairly strict, when types
# of words that preclude other words from happending can turn them
# off; this is controlled by valid_globals, valid_opts, and
# valid_commands. given_opts is used to narrow down which commands
# are valid based on the previously given options.
#
# After the command has been detected, the parsing becomes more
# complicated. The cmd_pos variable is set to 0 when the command is
# detected; it is used as a pointer into an array of the argument
# types for that given command. The argument types are stored in both
# cmd_args and raw_cmd as the main loop uses properties of arrays to
# detect certain conditions, but arrays cannot be passed to functions.
# To be able to deal with optional or repeatable arguments, the exit
# status of the function _ovs_vsctl_complete_argument represents where
# it has determined that the next argument will be.
_ovs_vsctl_bashcomp () {
local words cword valid_globals cmd_args raw_cmd cmd_pos valid_globals
valid_opts
local test="false"
# Does not support BASH_VERSION < 4.0
if [ ${BASH_VERSINFO[0]} -lt 4 ]; then
return 0
fi
# Prepare the COMP_* variables based on input.
if [ "$1" = "test" ]; then
test="true"
export COMP_LINE="ovs-vsctl $2"
tmp="ovs-vsctl"$'\n'"$(tr ' ' '\n' <<< "${COMP_LINE}x")"
tmp="${tmp%x}"
readarray -t COMP_WORDS \
<<< "$tmp"
export COMP_WORDS
export COMP_CWORD="$((${#COMP_WORDS[@]}-1))"
else
# If not in test mode, reassembles the COMP_WORDS and COMP_CWORD
# using just space as word break.
_get_comp_words_by_ref -n "\"'><=;|&(:" -w words -i cword
COMP_WORDS=( "${words[@]}" )
COMP_CWORD=${cword}
fi
# Extract the conf.db path.
db=$(sed -n 's/.*--db=\([^ ]*\).*/\1/p' <<< "$COMP_LINE")
if [ -n "$db" ]; then
_OVSDB_SERVER_LOCATION="$db"
fi
# If having trouble accessing the database, return.
if ! _ovs_vsctl get-manager 1>/dev/null 2>/dev/null; then
return 1;
fi
_OVS_VSCTL_PARSED_ARGS=()
_OVS_VSCTL_NEW_RECORDS=()
cmd_pos=-1
valid_globals=true
valid_opts=true
valid_commands=true
given_opts=""
index=1
for word in "${COMP_WORDS[@]:1:${COMP_CWORD}} "; do
_OVS_VSCTL_COMP_NOSPACE=false
local completion
completion=""
if [ $cmd_pos -gt -1 ]; then
local tmp tmp_noop arg possible_newindex
tmp=$(_ovs_vsctl_complete_argument "$raw_cmd" "$cmd_pos" "$word")
possible_newindex=$?
# Check for nospace.
_ovs_vsctl_detect_nospace $tmp
# Remove all options.
tmp_noop="${tmp#*EO}"
# Allow commands to specify that they should not be
# completed
if ! [[ $tmp =~ ^([^E]|E[^O])*NOCOMP ]]; then
# Directly assignment, since 'completion' is guaranteed to
# to be empty.
completion="$tmp_noop"
# If intermediate completion is empty, it means that the current
# argument is invalid. And we should not continue.
if [ $index -lt $COMP_CWORD ] \
&& (! _ovs_vsctl_detect_nonzero_completions "$completion");
then
_ovs_vsctl_process_messages "BM\nCannot complete
\'${COMP_WORDS[$index]}\' at index
${index}:\n$(_ovs_vsctl_get_PS1)${COMP_LINE}EM\nEO\n"
return 1
fi
else
# Only allow messages when there is no completion
# printout and when on the current word.
if [ $index -eq $COMP_CWORD ]; then
_ovs_vsctl_process_messages "${tmp}"
fi
# Append the new record to _OVS_VSCTL_NEW_RECORDS.
_OVS_VSCTL_NEW_RECORDS["${cmd_args[$cmd_pos]##*-}"]="${_OVS_VSCTL_NEW_RECORDS["${cmd_args[$cmd_pos]##*-}"]}
$tmp_noop"
fi
if [[ $cmd_pos -lt ${#cmd_args} ]]; then
_OVS_VSCTL_PARSED_ARGS["${cmd_args[$cmd_pos]:1}"]=$word
fi
if [ $possible_newindex -lt 254 ]; then
cmd_pos=$possible_newindex
fi
fi
if [ $valid_globals == true ]; then
tmp=$(_ovs_vsctl_bashcomp_globalopt $word)
_ovs_vsctl_detect_nospace $tmp
completion="${completion} ${tmp#*EO}"
fi
if [ $valid_opts == true ]; then
tmp=$(_ovs_vsctl_bashcomp_localopt "$given_opts" $word)
_ovs_vsctl_detect_nospace $tmp
completion="${completion} ${tmp#*EO}"
if [ $index -lt $COMP_CWORD ] \
&& _ovs_vsctl_detect_nonzero_completions "$tmp"; then
valid_globals=false
given_opts="${given_opts} ${word}"
fi
fi
if [ $valid_commands = true ]; then
tmp=$(_ovs_vsctl_bashcomp_command "$given_opts" $word)
_ovs_vsctl_detect_nospace $tmp
completion="${completion} ${tmp#*EO}"
if [ $index -lt $COMP_CWORD ] \
&& _ovs_vsctl_detect_nonzero_completions "$tmp"; then
valid_globals=false
valid_opts=false
valid_commands=false
cmd_pos=0
raw_cmd=$(_ovs_vsctl_expand_command "$word")
readarray -t cmd_args <<< "$raw_cmd"
fi
fi
if [ "$word" = "--" ] && [ $index -lt $COMP_CWORD ]; then
# Empty the parsed args array.
_OVS_VSCTL_PARSED_AGS=()
cmd_pos=-1
# No longer allow global options after '--'.
valid_globals=false
valid_opts=true
valid_commands=true
given_opts=""
fi
completion="$(sort -u <<< "$(tr ' ' '\n' <<< ${completion})")"
if [ $index -eq $COMP_CWORD ]; then
if [ "$test" = "true" ]; then
completion="$(_ovs_vsctl_trim_compreply "$word" ":="
${completion} | \
tr ' ' '\n')"
if [ "${_OVS_VSCTL_COMP_NOSPACE}" = "true" ]; then
printf "%s" "$completion" | sed -e '/^$/d'
else
printf "%s" "$completion" | sed -e '/^$/d; s/$/ /g'
fi
printf "\n"
else
if [ "${_OVS_VSCTL_COMP_NOSPACE}" = "true" ]; then
compopt -o nospace
COMPREPLY=( $(compgen -W "${completion}" -- $word) )
else
compopt +o nospace
COMPREPLY=( $(compgen -W "${completion}" -- $word) )
fi
COMPREPLY=( $(_ovs_vsctl_trim_compreply "$word" \
"${COMP_WORDBREAKS}" ${COMPREPLY[@]}) )
fi
fi
index=$(($index+1))
done
}
if [ "$1" = "test" ]; then
_ovs_vsctl_bashcomp "$@"
else
complete -F _ovs_vsctl_bashcomp ovs-vsctl
fi
