Différences

Ci-dessous, les différences entre deux révisions de la page.

--- tuto:linux:script_timeout_en_shell [2010/01/22 21:44] – créée root
+++ tuto:linux:script_timeout_en_shell [2013/03/12 22:12] – root
@@ Ligne 1: / Ligne 1: @@
 ====== Timeout en SHELL ======
+**timeout.sh**
+<code bash>
+#!/bin/sh
+# Execute a command with a timeout
+# Author:
+#    http://www.pixelbeat.org/
+# Notes:
+#    If the timeout occurs the exit status is 124.
+#    There is an asynchronous (and buggy) equivalent of this
+#    script packaged with bash (under /usr/share/doc/ in my distro),
+#    which I only noticed after writing this.
+#    Note there is a timeout command packaged with coreutils since v7.0
+#    I noticed later again that there is a C equivalent of this packaged
+#    with satan by Wietse Venema, and copied to forensics by Dan Farmer.
+# Changes:
+#    V1.0, Nov  3 2006, Initial release
+#    V1.1, Nov 20 2007, Brad Greenlee <brad@footle.org>
+#                       Make more portable by using the 'CHLD'
+#                       signal spec rather than 17.
+#    V1.3, Oct 29 2009, JÃ¡n SÃ¡renÃk <jasan@x31.com>
+#                       Even though this runs under dash,ksh etc.
+#                       it doesn't actually timeout. So enforce bash for now.
+#                       Also change exit on timeout from 128 to 124
+#                       to match coreutils.
+#    V2.0, Oct 30 2009, JÃ¡n SÃ¡renÃk <jasan@x31.com>
+#                       Rewritten to cover compatibility with other
+#                       Bourne shell implementations (pdksh, dash)
+if [ "$#" -lt "2" ]; then
+    echo "Usage:   `basename $0` timeout_in_seconds command" >&2
+    echo "Example: `basename $0` 2 sleep 3 || echo timeout" >&2
+    exit 1
+fi
+cleanup()
+{
+    trap - ALRM               #reset handler to default
+    kill -ALRM $a 2>/dev/null #stop timer subshell if running
+    kill $! 2>/dev/null &&    #kill last job
+      exit 124                #exit with 124 if it was running
+}
+watchit()
+{
+    trap "cleanup" ALRM
+    sleep $1& wait
+    kill -ALRM $$
+}
+watchit $1& a=$!                      #start the timeout
+shift                                 #first param was timeout for sleep
+trap "cleanup" ALRM INT               #cleanup after timeout
+("$@" || exit $?)& wait $!; RET=$?    #start the job wait for it and save its return value
+kill -ALRM $a                         #send ALRM signal to watchit
+wait $a                               #wait for watchit to finish cleanup
+exit $RET                             #return the value
+</code>
+  ./timeout.sh 2 sleep 4
+Un autre script s'appuyant sur timeout.sh permettant de lancer des processus à la volée avec des timeout :
 <code>
 #!/bin/bash
-timeout=$1
+dir_result="/root/results"
-command=$2
-shift 2
+declare -a command command_pid
-check_pid_name() {
+usage() {
-        command=$1
+        echo "Usage : $0 <command1>,<timeout> <command2>,<command3>"
-        childpid=$2
+        exit 1
-        [ -d /proc/$childpid ] || return 1
-        [ $(grep -c $command /proc/$childpid/cmdline 2>/dev/null) -gt 0 ] && return 0 || return 1
 }
-[ -z "$command" ] && echo "Usage: safecmd   [args]">&2 && exit 1
+kill_proc() {
+        for pid in ${command_pid[*]}; do
-safe_run() {
+                [ -d /proc/$pid ] && [ `grep $0 /proc/${pid}/cmdline | wc -l` -ne 0 ] && kill -9 $pid && echo -e "$pid tué"
-        command=$1
+        done
-        shift
-        $command $*
-        kill $$
-}
-safe_run $command $* &
-childpid=$!
-sleep $timeout
-check_pid_name $command $childpid && {
-        kill $childpid
-        sleep 0.1
-        check_pid_name $command $childpid && kill -9 $childpid
-        echo "$command $* timed out"
 }
+while getopts :h OPTION
+do
+        case "$OPTION" in
+             h)
+                usage
+                ;;
+        esac
+done
+nb_arg=`echo "$@" | awk -F\, '{ print NF }'`
+[ ! -d $dir_result ] && mkdir -p "$dir_result"
+echo "Table des processus :"
+for ((i=1; i<=$nb_arg; i+=1))
+do
+        log=`expr $i - 1`
+        cmd=`echo "$@" | awk -v nb=$i -F\, '{ print $nb }' | sed s/^' '*//g`
+        command[${#command[*]}]=$cmd
+        if [ `echo "$cmd" | awk '{ print $1 }' | grep "^[[:digit:]]" | wc -l` -gt 0 ] ; then
+                timeout=`echo "$cmd" | awk '{ print $1 }'`
+        fi
+        if [ -z $timeout ] ; then
+                (
+                        $cmd 2>&1 1>$dir_result/$log
+                        ret=$?
+                        sleep 0.1
+                        echo "$! : Fait ($ret)"
+                        [ $ret -ne 0 ] && exit 1
+                ) &
+        else
+                (
+                        `dirname $0`/timeout.sh $cmd 2>&1 1>$dir_result/$log
+                        ret=$?
+                        sleep 0.1
+                        if [ $ret -eq 0 ] ; then
+                                echo "$! : Fait ($ret)"
+                        else if [ $ret -eq 124 ] ; then
+                                echo "$! : Timeout"
+                                exit 1
+                        else
+                                echo  "$! : Fait($ret) !"
+                                exit 1
+                        fi
+                        fi
+                ) &
+                unset timeout
+        fi
+        command_pid[${#command_pid[*]}]=$!
+done
+for i in ${!command[*]}
+do
+        if [ `echo ${command[i]} | awk '{ print $1 }' | grep "^[[:digit:]]" | wc -l` -gt 0 ] ; then
+                echo "${command_pid[i]} : `echo ${command[i]} | cut -d ' ' -f 2-` - timeout(`echo ${command[i]} | awk '{ print $1 }'`)"
+        else
+                echo "${command_pid[i]} : ${command[i]}"
+        fi
+done
+echo ""
+trap 'kill_proc' 2 3 15
+wait
+for i in ${!command[*]}
+do
+        [ -f "$dir_result/$i" ] && mv "$dir_result/$i" "$dir_result/${command_pid[i]}"
+done
 </code>
-  ./script 2 sleep 4