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runif for lockutil

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This commit is contained in:
Ville Rantanen
2023-09-08 08:37:10 +03:00
parent a189d6dc6f
commit a21d62dfce
1 changed files with 62 additions and 47 deletions
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103
files/lock-util
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@@ -1,83 +1,98 @@
#!/bin/bash
VERSION=230908.0
_help() {
echo '
Usage: lock-util {lock-file} [-v] [command] [args]
Commands:
create
exist ( return 0 if lock exists )
old [age in seconds] ( return 0 if file younger than [args] seconds or file not present )
old [age in seconds] ( return 0 if file older than [args] seconds or file not present )
runif [age in seconds] ( old + create, if file not exist, or older than [arg], then touch file and return 0, else 1 )
remove
-v as first argument sets very verbose mode
'
'
}
LOCKFILE="$1"
[[ "$2" = "-v" ]] && {
VERBOSE=on
COMMAND="$3"
ARG="$4"
} || {
COMMAND="$2"
ARG="$3"
VERBOSE=on
COMMAND="$3"
ARG="$4"
} || {
COMMAND="$2"
ARG="$3"
}
BOXES=cat
which boxes &>/dev/null && BOXES="boxes -d shell"
_create() {
LOCKDIR=$( dirname "$LOCKFILE" )
mkdir -p "$LOCKDIR"
touch "$LOCKFILE"
LOCKDIR=$( dirname "$LOCKFILE" )
mkdir -p "$LOCKDIR"
touch "$LOCKFILE"
}
_exist() {
test -f "$LOCKFILE"
test -f "$LOCKFILE"
}
_remove() {
rm "$LOCKFILE"
rm "$LOCKFILE"
}
[[ $COMMAND = "create" ]] && {
_exist && {
[[ "$VERBOSE" = "on" ]] && echo "LOCK FILE EXISTS" | $BOXES
exit 1
}
_create
ec=$?
[[ "$VERBOSE" = "on" ]] && [[ $ec -eq 0 ]] && echo "LOCK FILE CREATED" | $BOXES
[[ "$VERBOSE" = "on" ]] && [[ $ec -ne 0 ]] && echo "UNABLE TO CREATE LOCK FILE" | $BOXES
exit $ec
_exist && {
[[ "$VERBOSE" = "on" ]] && echo "LOCK FILE EXISTS" | $BOXES
exit 1
}
_create
ec=$?
[[ "$VERBOSE" = "on" ]] && [[ $ec -eq 0 ]] && echo "LOCK FILE CREATED" | $BOXES
[[ "$VERBOSE" = "on" ]] && [[ $ec -ne 0 ]] && echo "UNABLE TO CREATE LOCK FILE" | $BOXES
exit $ec
}
[[ $COMMAND = "exist" ]] && {
_exist
ec=$?
[[ "$VERBOSE" = "on" ]] && [[ $ec -eq 0 ]] && echo "LOCK FILE EXISTS" | $BOXES
[[ "$VERBOSE" = "on" ]] && [[ $ec -ne 0 ]] && echo "LOCK FILE DOES NOT EXIST" | $BOXES
exit $ec
_exist
ec=$?
[[ "$VERBOSE" = "on" ]] && [[ $ec -eq 0 ]] && echo "LOCK FILE EXISTS" | $BOXES
[[ "$VERBOSE" = "on" ]] && [[ $ec -ne 0 ]] && echo "LOCK FILE DOES NOT EXIST" | $BOXES
exit $ec
}
[[ $COMMAND = "old" ]] && {
_exist || {
[[ "$VERBOSE" = "on" ]] && echo "LOCK FILE MISSING" | $BOXES
exit 0
}
[[ -z "$ARG" ]] && _help && echo "MISSING ARGUMENT" | $BOXES && exit 1
created=$( stat -c %Y "$LOCKFILE" )
now=$( date +%s )
age=$(( $now - $created ))
test $ARG -lt $age
ec=$?
[[ "$VERBOSE" = "on" ]] && [[ $ec -eq 0 ]] && echo "LOCK FILE OLDER THAN $ARG s" | $BOXES
[[ "$VERBOSE" = "on" ]] && [[ $ec -ne 0 ]] && echo "LOCK FILE YOUNGER THAN $ARG s" | $BOXES
exit $ec
_exist || {
[[ "$VERBOSE" = "on" ]] && echo "LOCK FILE MISSING" | $BOXES
exit 0
}
[[ -z "$ARG" ]] && _help && echo "MISSING ARGUMENT" | $BOXES && exit 1
created=$( stat -c %Y "$LOCKFILE" )
now=$( date +%s )
age=$(( $now - $created ))
test $ARG -lt $age
ec=$?
[[ "$VERBOSE" = "on" ]] && [[ $ec -eq 0 ]] && echo "LOCK FILE OLDER THAN $ARG s" | $BOXES
[[ "$VERBOSE" = "on" ]] && [[ $ec -ne 0 ]] && echo "LOCK FILE YOUNGER THAN $ARG s" | $BOXES
exit $ec
}
[[ $COMMAND = "remove" ]] && {
_remove
_remove
ec=$?
[[ "$VERBOSE" = "on" ]] && [[ $ec -eq 0 ]] && echo "LOCK FILE REMOVED" | $BOXES
[[ "$VERBOSE" = "on" ]] && [[ $ec -ne 0 ]] && echo "UNABLE TO REMOVE LOCK FILE" | $BOXES
exit $ec
}
[[ $COMMAND = "runif" ]] && {
[[ -z "$ARG" ]] && _help && echo "MISSING ARGUMENT" | $BOXES && exit 1
VERBOSE=$VERBOSE "$0" "$LOCKFILE" old "$ARG"
ec=$?
[[ $ec -eq 0 ]] && {
_exist && _remove
VERBOSE=$VERBOSE "$0" "$LOCKFILE" create
ec=$?
[[ "$VERBOSE" = "on" ]] && [[ $ec -eq 0 ]] && echo "LOCK FILE REMOVED" | $BOXES
[[ "$VERBOSE" = "on" ]] && [[ $ec -ne 0 ]] && echo "UNABLE TO REMOVE LOCK FILE" | $BOXES
exit $ec
}
exit $ec
}
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