diff options
Diffstat (limited to 'files/common/sbin/fsm')
| -rwxr-xr-x | files/common/sbin/fsm | 107 |
1 files changed, 0 insertions, 107 deletions
diff --git a/files/common/sbin/fsm b/files/common/sbin/fsm deleted file mode 100755 index 177d0c7..0000000 --- a/files/common/sbin/fsm +++ /dev/null @@ -1,107 +0,0 @@ -#!/bin/sh -e - -# paths to state file and definition dir -PState=/var/fsm/$2 -PDef=/etc/fsm/$2 - -watch () { - SO=$(cat $PState) - SN=$(callOne $PDef/watch $SO "xxx" \ - "./$SO - ./default - /bin/false") || fail "watch script failed or missing" - [ -n "$SN" ] || fail "watch script $S0 returned empty state name" - change $SN -} - -change () { - SO=$(cat $PState) - SN=$1 - if [ "$SO" != "$SN" ]; then - if [ -x $PDef/trans/$SO-$SN.trans ]; then - # one script to handle whole transition - callOne $PDef/trans $SO $SN \ - "./$SO-$SN.trans" \ - || fail "state transition script failed" - else - # seperate scripts for leaving and entering states - callOne $PDef/trans $SO $SN \ - "./$SO.leave - ./default.leave - /bin/true" \ - || fail "state leave script failed" - callOne $PDef/trans $SO $SN \ - "./$SN.enter - ./default.enter - /bin/true" \ - || fail "state enter script failed" - - fi - echo $SN > $PState - fi -} - -callOne () { # args: cwd arg1 arg2 cmdlist - echo "$4" | sed 's/ *//' | ( - set -e - cd $1 - while read cmd; do - if [ -x "$cmd" ]; then - $cmd $2 $3 666<&- - exit $? - fi - done ) -} - -lockState () { - # lock state file (neccessary also for watch, as it calls scripts - # that assume a certain state as active during their whole - # execution time) - exec 666<$1 - flock -x 666 -} - -fail() { - echo "$1" 1>&2 - exit 1 -} - -printArgs () { - fail "Usage: -$0 get fsm -$0 watch fsm -$0 change fsm state" -} - -[ $# -lt 2 ] && printArgs - -# check for minimal FSM definition -if [ -f $PDef/initial_state \ - -a -d $PDef/watch \ - -a -d $PDef/trans ]; then - if [ ! -f $PState ]; then - mkdir -p $(dirname $PState) - S=$(cat $PDef/initial_state) - [ -n "$S" ] || fail "initial state must not be empty" - echo $S >$PState - fi -else - fail "FSM $2 does not exist" -fi - -case "$1" in - get) - cat $PState - ;; - watch) - lockState $PState - watch - ;; - change) - [ -n "$3" ] || printArgs - lockState $PState - change $3 - ;; - *) - printArgs -esac
\ No newline at end of file |