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Merge pull request #132 from mag37/xargs_hotfix

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Made MaxAsync=1 the default - edit to change.
Added -x option to pass a MaxAsync value on runtime.
Made it possible to disable xargs -P-flag by setting MaxAsync=0 or passing -x 0 option.
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mag37 2025-02-26 21:42:58 +01:00 • committed by GitHub
commit 9fa398e553
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1 changed files with 11 additions and 7 deletions
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dockcheck.sh
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@ -1,6 +1,6 @@
#!/usr/bin/env bash
VERSION="v0.5.6.0"
### ChangeNotes: Heavily improved performance due to asynchronous update checks.
VERSION="v0.5.6.1"
### ChangeNotes: Async hotfix, 1 subprocess default, modify MaxAsync variable or pass -x N option to increase.
Github="https://github.com/mag37/dockcheck"
RawUrl="https://raw.githubusercontent.com/mag37/dockcheck/main/dockcheck.sh"
@ -13,6 +13,10 @@ ScriptWorkDir="$(dirname "$ScriptPath")"
LatestRelease="$(curl -s -r 0-50 $RawUrl | sed -n "/VERSION/s/VERSION=//p" | tr -d '"')"
LatestChanges="$(curl -s -r 0-200 $RawUrl | sed -n "/ChangeNotes/s/# ChangeNotes: //p")"
# User customizable defaults
MaxAsync=1
Timeout=10
# Help Function
Help() {
echo "Syntax: dockcheck.sh [OPTION] [part of name to filter]"
@ -34,6 +38,7 @@ Help() {
echo "-s Include stopped containers in the check. (Logic: docker ps -a)."
echo "-t Set a timeout (in seconds) per container for registry checkups, 10 is default."
echo "-v Prints current version."
echo "-x N Set max asynchronous subprocesses, 1 default, 0 to disable, 32+ tested."
echo
echo "Project source: $Github"
}
@ -46,10 +51,8 @@ c_blue="\033[0;34m"
c_teal="\033[0;36m"
c_reset="\033[0m"
MaxAsync=32
Timeout=10
Stopped=""
while getopts "aynpfrhlisvmc:e:d:t:" options; do
while getopts "aynpfrhlisvmc:e:d:t:x:" options; do
case "${options}" in
a|y) AutoUp="yes" ;;
c) CollectorTextFileDirectory="${OPTARG}"
@ -65,6 +68,7 @@ while getopts "aynpfrhlisvmc:e:d:t:" options; do
s) Stopped="-a" ;;
t) Timeout="${OPTARG}" ;;
v) printf "%s\n" "$VERSION" ; exit 0 ;;
x) MaxAsync=${OPTARG} ;;
d) DaysOld=${OPTARG}
if ! [[ $DaysOld =~ ^[0-9]+$ ]] ; then { printf "Days -d argument given (%s) is not a number.\n" "${DaysOld}" ; exit 2 ; } ; fi ;;
h|*) Help ; exit 2 ;;
@ -321,11 +325,11 @@ export Excludes_string="${Excludes[@]}" # Can only export scalar variables
export t_out regbin RepoUrl DaysOld
# Check for POSIX xargs with -P option, fallback without async
if (echo "test" | xargs -P 10 >/dev/null 2>&1) ; then
if (echo "test" | xargs -P 2 >/dev/null 2>&1) && [[ "$MaxAsync" != 0 ]]; then
XargsAsync="-P $MaxAsync"
else
XargsAsync=""
printf "%bMissing POSIX xargs, consider installing 'findutils' for asynchronous lookups.%b\n" "$c_red" "$c_reset"
[[ "$MaxAsync" != 0 ]] && printf "%bMissing POSIX xargs, consider installing 'findutils' for asynchronous lookups.%b\n" "$c_red" "$c_reset"
fi
# Asynchronously check the image-hash of every running container VS the registry