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#!/bin/bash
# run a process in the background, and log it's stdout and stderr to a specific logfile
# returncode is stored in $<identifier>_exitcode
# $1 identifier
# $2 command (will be eval'ed)
# $3 logfile
run_background ()
{
[ -z "$1" ] && die_error "run_background: please specify an identifier to keep track of the command!"
[ -z "$2" ] && die_error "run_background needs a command to execute!"
[ -z "$3" ] && die_error "run_background needs a logfile to redirect output to!"
debug "run_background called. identifier: $1, command: $2, logfile: $3"
( \
touch $RUNTIME_DIR/.$1-running
debug "run_background starting $1: $2 >>$3 2>&1"
[ -f $3 ] && echo -e "\n\n\n" >>$3
echo "STARTING $1 . Executing $2 >>$3 2>&1\n" >> $3;
var_exit=${1}_exitcode
eval "$2" >>$3 2>&1
read $var_exit <<< $? #TODO: bash complains about 'not a valid identifier'
debug "run_background done with $1: exitcode (\$$1_exitcode): "${!var_exit}" .Logfile $3" #TODO ${!var_exit} doesn't show anything --> maybe fixed now
echo >> $3
rm -f $RUNTIME_DIR/.$1-running
) &
sleep 2
}
# wait until a process is done
# $1 identifier
wait_for ()
{
[ -z "$1" ] && die_error "wait_for needs an identifier to known on which command to wait!"
while [ -f $RUNTIME_DIR/.$1-running ]
do
#TODO: follow_progress dialog mode = nonblocking (so check and sleep is good), cli mode (tail -f )= blocking? (so check is probably not needed as it will be done)
sleep 1
done
kill $(cat $ANSWER) #TODO: this may not work when mode = cli
}
# $1 set (array) haystack
# $2 needle
check_is_in ()
{
[ -z "$1" ] && debug "check_is_in $1 $2" && die_error "check_is_in needs a non-empty needle as \$2 and a haystack as \$1!" # haystack can be empty though
local pattern="$1" element
shift
for element
do
[[ $element = $pattern ]] && return 0
done
return 1
}
# cleans up file in the runtime directory who can be deleted, make dir first if needed
cleanup_runtime ()
{
mkdir -p $RUNTIME_DIR || die_error "Cannot create $RUNTIME_DIR"
rm -rf $RUNTIME_DIR/.dia* &>/dev/null
}
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