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exit code and failure states rework

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Signed-off-by: fbt <fbt@fleshless.org>
This commit is contained in:
Jack L. Frost 2018-03-05 00:16:45 +03:00
parent 7a3bb1a5f0
commit 623bf57bdb
1 changed files with 27 additions and 18 deletions
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45
ssm
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@ -9,7 +9,7 @@ usage() {
cat <<- EOF
Usage: ssm <service> <function>
EOF
}
}; readonly usage;
var() {
declare var_function=$1; shift
@ -82,6 +82,7 @@ var() {
(is_fs_object) [[ -e \"\$_var\" ]];;
(is_file) [[ -f \"\$_var\" ]];;
(is_dir|is_directory) [[ -d \"\$_var\" ]];;
(is_empty) [[ -z \"\$_var\" ]];;
(*) die 71 \"Syntax error in ${var_function}!\";;
esac
@ -128,7 +129,7 @@ spawn() {
else
exec "$@" >"$service_logfile_out" 2>"$service_logfile_err"
fi
}
}; readonly spawn;
## Run the command and wait for it to die
svc() {
@ -170,7 +171,7 @@ svc() {
# We need to wait for the service to write down its pidfile
until service_pidfile is file; do
(( counter >= service_pidfile_timeout*10 )) && {
printf 'No pidfile' > "$service_failed_flag"
printf '127' > "$service_exit_file"
break
}
counter++
@ -189,10 +190,10 @@ svc() {
else
job_success = 0
fail_counter++
printf '%s' "$job_exit" > "$service_failed_flag"
fi
printf '%s' "$job_exit" > "$service_exit_file"
# Back off if the service exits too much AND too quickly.
service_respawn_force || {
if (( fail_counter >= 3 )); then
@ -209,9 +210,6 @@ svc() {
(on-failure) job_success && break;;
esac
# Remove the failed flag, we're going to attempt a restart.
rm -f "$service_failed_flag"
# Record the time every time we restart the loop
printf -v last_respawn '%(%s)T'
done
@ -257,6 +255,10 @@ timer() {
return 0
}; readonly -f timer
## Set a service's ready flag.
set_ready() { printf '1' > "$service_ready_flag"; }
readonly -f set_ready
## Is a service ready?
is_ready() { service_ready_flag is file; }
readonly -f is_ready
@ -359,7 +361,7 @@ start() {
if service_oneshot; then
spawn "${service_command[@]}"; res=$?
(( res )) && {
printf '%s' "$res" > "$service_failed_flag"
printf '%s' "$res" > "$service_exit_file"
return "$res"
}
printf '1' > "$service_enabled_flag"
@ -367,7 +369,7 @@ start() {
svc "${service_command[@]}" &
if timer "$service_ready_timeout" ready; then
printf '1' > "$service_ready_flag"
set_ready
else
return 5
fi
@ -488,6 +490,7 @@ status() {
service_enabled && return 0
service_stopped && return 7
service_failed && return 9
service_exit_last is empty || return 11
return 1
}
@ -499,7 +502,7 @@ qstatus() { nullexec status; }
ready() { :; }
## Reset failes
reset-failed() { rm -f "$service_failed_flag"; }
reset-failed() { rm -f "$service_exit_file"; }
# Main code
## Empty declarations
@ -517,7 +520,8 @@ var service_pid \
service_ready_flag \
service_enabled_flag \
service_stopped_flag \
service_failed_flag \
service_exit_file \
service_exit_last \
service_cgroup_name \
service_cgroup_procs \
service_cgroup_path \
@ -688,7 +692,7 @@ service_logfile_err := "$service_logfile_out"
service_ready_flag := "$rundir/$service_name.ready"
service_enabled_flag := "$rundir/$service_name.enabled"
service_stopped_flag := "$rundir/$service_name.stopped"
service_failed_flag := "$rundir/$service_name.failed"
service_exit_file := "$rundir/$service_name.exit"
service_cgroup_name := "$service_name"
service_cgroup_path := "$cgroup_home/$service_name"
service_success_exit := 0
@ -721,10 +725,14 @@ if service_stopped_flag is file; then
service_stopped = 1
fi
# Maybe it has failed?
if service_failed_flag is file; then
# :(
service_failed = 1
# Check if the service has failed
if service_exit_file is file; then
read -r service_exit_last < "$service_exit_file"
if ! service_success_exit u "$service_exit_last"; then
# :(
service_failed = 1
fi
fi
# Check cgroups, if enabled
@ -800,7 +808,8 @@ case "$2" in
0 "$service_name is running" \
1 "$service_name is not running" \
7 "$service_name was stopped" \
9 "$service_name has failed"
9 "$service_name has failed with code: $service_exit_last" \
11 "$service_name has exited with code: $service_exit_last"
fi
;;
esac