# and is available on most Linux systems. If Perl was distributed with
# BSD::Resource included, we would happily use that instead, but it isn't.
+# Clean up cgroup
+cleanup() {
+ # First we have to move the current task into a "garbage" group, otherwise
+ # the cgroup will not be empty, and attempting to remove it will fail with
+ # "Device or resource busy"
+ if [ -w "$MW_CGROUP"/tasks ]; then
+ GARBAGE="$MW_CGROUP"
+ else
+ GARBAGE="$MW_CGROUP"/garbage-`id -un`
+ if [ ! -e "$GARBAGE" ]; then
+ mkdir -m 0700 "$GARBAGE"
+ fi
+ fi
+ echo $BASHPID > "$GARBAGE"/tasks
+
+ # Suppress errors in case the cgroup has disappeared due to a release script
+ rmdir "$MW_CGROUP"/$$ 2>/dev/null
+}
+
+updateTaskCount() {
+ # There are lots of ways to count lines in a file in shell script, but this
+ # is one of the few that doesn't create another process, which would
+ # increase the returned number of tasks.
+ readarray < "$MW_CGROUP"/$$/tasks
+ NUM_TASKS=${#MAPFILE[*]}
+}
+
+log() {
+ echo limit.sh: "$*" >&3
+ echo limit.sh: "$*" >&2
+}
+
MW_INCLUDE_STDERR=
+MW_USE_LOG_PIPE=
MW_CPU_LIMIT=0
MW_CGROUP=
MW_MEM_LIMIT=0
if [ -n "$MW_INCLUDE_STDERR" ]; then
exec 2>&1
fi
+if [ -z "$MW_USE_LOG_PIPE" ]; then
+ # Open a dummy log FD
+ exec 3>/dev/null
+fi
if [ "$MW_CPU_LIMIT" -gt 0 ]; then
ulimit -t "$MW_CPU_LIMIT"
if [ -n "$MW_CGROUP" ]; then
# Create cgroup
if ! mkdir -m 0700 "$MW_CGROUP"/$$; then
- echo "limit.sh: failed to create the cgroup." 1>&2
- exit 1
+ log "failed to create the cgroup."
+ MW_CGROUP=""
fi
+ fi
+ if [ -n "$MW_CGROUP" ]; then
echo $$ > "$MW_CGROUP"/$$/tasks
if [ -n "$MW_CGROUP_NOTIFY" ]; then
echo "1" > "$MW_CGROUP"/$$/notify_on_release
ulimit -f "$MW_FILE_SIZE_LIMIT"
fi
if [ "$MW_WALL_CLOCK_LIMIT" -gt 0 -a -x "/usr/bin/timeout" ]; then
- /usr/bin/timeout $MW_WALL_CLOCK_LIMIT /bin/bash -c "$1"
+ /usr/bin/timeout $MW_WALL_CLOCK_LIMIT /bin/bash -c "$1" 3>&-
STATUS="$?"
if [ "$STATUS" == 124 ]; then
- echo "limit.sh: timed out." 1>&2
+ log "timed out executing command \"$1\""
fi
else
- eval "$1"
+ eval "$1" 3>&-
STATUS="$?"
fi
-# Clean up cgroup
-cleanup() {
- # First we have to move the current task into a "garbage" group, otherwise
- # the cgroup will not be empty, and attempting to remove it will fail with
- # "Device or resource busy"
- if [ -w "$MW_CGROUP"/tasks ]; then
- GARBAGE="$MW_CGROUP"
- else
- GARBAGE="$MW_CGROUP"/garbage-"$USER"
- if [ ! -e "$GARBAGE" ]; then
- mkdir -m 0700 "$GARBAGE"
- fi
- fi
- echo $BASHPID > "$GARBAGE"/tasks
-
- # Suppress errors in case the cgroup has disappeared due to a release script
- rmdir "$MW_CGROUP"/$$ 2>/dev/null
-}
-
-updateTaskCount() {
- # There are lots of ways to count lines in a file in shell script, but this
- # is one of the few that doesn't create another process, which would
- # increase the returned number of tasks.
- readarray < "$MW_CGROUP"/$$/tasks
- NUM_TASKS=${#MAPFILE[*]}
-}
-
if [ -n "$MW_CGROUP" ]; then
updateTaskCount
updateTaskCount
done
cleanup
- ) >&/dev/null < /dev/null &
+ ) >&/dev/null < /dev/null 3>&- &
disown -a
else
cleanup