[type/__postgres_conf] Implement complex state compare logic
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Dennis Camera
parent
e0416403c4
commit
12c2995494
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@ -22,6 +22,52 @@
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postgres_user=$("${__type_explorer:?}/postgres_user")
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conf_name=${__object_id:?}
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tolower() { printf '%s' "$*" | tr '[:upper:]' '[:lower:]'; }
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tobytes() {
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# NOTE: This function treats everything as base 2.
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# It is not compatible with SI units.
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awk 'BEGIN { FS = "\n" }
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/TB$/ { $0 = ($0 * 1024) "GB" }
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/GB$/ { $0 = ($0 * 1024) "MB" }
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/MB$/ { $0 = ($0 * 1024) "kB" }
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/kB$/ { $0 = ($0 * 1024) "B" }
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/B?$/ { sub(/ *B?$/, "") }
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($0*1) == $0 # is number
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' <<-EOF
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$1
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EOF
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}
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tomillisecs() {
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awk 'BEGIN { FS = "\n" }
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/d$/ { $0 = ($0 * 24) "h" }
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/h$/ { $0 = ($0 * 60) "min" }
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/min$/ { $0 = ($0 * 60) "s" }
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/[^m]s$/ { $0 = ($0 * 1000) "ms" }
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/ms$/ { $0 *= 1 }
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($0*1) == $0 # is number
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' <<-EOF
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$1
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EOF
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}
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tobool() {
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# prints either 'on' or 'off'
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case $(tolower "$1")
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in
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(t|true|y|yes|on|1)
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echo 'on' ;;
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(f|false|n|no|off|0)
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echo 'off' ;;
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(*)
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printf 'Inavlid bool value: %s\n' "$2" >&2
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return 1
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;;
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esac
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return 0
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}
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quote() { printf '%s\n' "$*" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/'/"; }
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psql_exec() {
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su - "${postgres_user}" -c "psql postgres -twAc $(quote "$*")"
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@ -31,9 +77,123 @@ psql_conf_source() {
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# NOTE: SHOW/SET are case-insentitive, so this command should also be.
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psql_exec "SELECT CASE WHEN source = 'default' OR setting = boot_val THEN 'default' ELSE source END FROM pg_settings WHERE lower(name) = lower('$1')"
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}
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psql_conf_cmp() {
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test "$(psql_exec "SHOW $1")" = "$2"
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}
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psql_conf_cmp() (
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IFS='|' read -r lower_name vartype setting unit <<-EOF
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$(psql_exec "SELECT lower(name), vartype, setting, unit FROM pg_settings WHERE lower(name) = lower('$1')")
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EOF
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should_value=$2
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is_value=${setting}
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# The following case contains special cases for special settings.
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case ${lower_name}
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in
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(archive_command)
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if test "${setting}" = '(disabled)'
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then
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# DAFUQ PostgreSQL?!
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# PostgreSQL returns (disabled) if the feature is inactive.
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# We cannot compare the values unless it is enabled, first.
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return 0
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fi
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;;
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(archive_mode|backslash_quote|constraint_exclusion|force_parallel_mode|huge_pages|synchronous_commit)
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# Although only 'on', 'off' are documented, PostgreSQL accepts all
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# the "likely" variants of "on" and "off".
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case $(tolower "${should_value}")
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in
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(on|off|true|false|yes|no|1|0)
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should_value=$(tobool "${should_value}")
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;;
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esac
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;;
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esac
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case ${vartype}
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in
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(bool)
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test -z "${unit}" || {
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# please fix the explorer if this error occurs.
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printf 'units are not supported for vartype: %s\n' "${vartype}" >&2
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exit 1
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}
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should_value=$(tobool "${should_value}")
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test "${is_value}" = "${should_value}"
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;;
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(enum)
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test -z "${unit}" || {
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# please fix the explorer if this error occurs.
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printf 'units are not supported with vartype: %s\n' "${vartype}" >&2
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exit 1
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}
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# NOTE: All enums that are currently defined are lower case, but
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# PostgreSQL also accepts upper case spelling.
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should_value=$(tolower "$2")
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test "${is_value}" = "${should_value}"
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;;
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(integer)
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# split multiples from unit, first (e.g. 8kB -> 8, kB)
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case ${unit}
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in
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([0-9]*)
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multiple=${unit%%[!0-9]*}
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unit=${unit##*[0-9 ]}
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;;
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(*) multiple=1 ;;
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esac
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is_value=$((setting * multiple))${unit}
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if expr "${should_value}" : '-\{0,1\}[0-9]*$' >/dev/null
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then
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# default unit
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should_value=$((should_value * multiple))${unit}
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fi
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# then, do conversion
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# NOTE: these conversions work for integers only!
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case ${unit}
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in
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(B|[kMGT]B)
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# bytes
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is_bytes=$(tobytes "${is_value}")
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should_bytes=$(tobytes "${should_value}")
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test $((is_bytes)) -eq $((should_bytes))
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;;
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(ms|s|min|h|d)
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# seconds
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is_ms=$(tomillisecs "${is_value}")
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should_ms=$(tomillisecs "${should_value}")
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test $((is_ms)) -eq $((should_ms))
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;;
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('')
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# no unit
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is_int=${is_value}
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should_int=${should_value}
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test $((is_int)) -eq $((should_int))
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;;
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esac
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;;
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(real|string)
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# NOTE: reals could possibly have units, but currently there none.
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test -z "${unit}" || {
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# please fix the explorer if this error occurs.
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printf 'units are not supported with vartype: %s\n' "${vartype}" >&2
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exit 1
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}
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test "${is_value}" = "${should_value}"
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;;
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esac
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)
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psql_exec 'SELECT 1' >/dev/null || {
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echo 'Connection to PostgreSQL server failed' >&2
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