From e0ff64cd640f23e6e3a36231625e3ff038a8ae38 Mon Sep 17 00:00:00 2001
From: Pierre Hyvernat <pierre.hyvernat@univ-smb.fr>
Date: Thu, 9 May 2024 21:48:27 +0200
Subject: [PATCH] better control-c mission

---
 missions/index.txt                            |   3 +-
 .../{05_control-C => 05_background}/Makefile  |   0
 .../intermediate/05_background/ascii-art/f1   |   3 +
 .../intermediate/05_background/ascii-art/f2   |   4 +
 .../intermediate/05_background/ascii-art/f3   |   4 +
 .../intermediate/05_background/ascii-art/f4   |   5 +
 .../intermediate/05_background/ascii-art/f5   |   5 +
 .../intermediate/05_background/ascii-art/f6   |   4 +
 missions/intermediate/05_background/auto.sh   |   5 +
 .../intermediate/05_background/charmiglio.sh  |  24 ++++
 missions/intermediate/05_background/check.sh  |  37 ++++++
 .../{05_control-C => 05_background}/goal.sh   |   0
 .../intermediate/05_background/goal/en.txt    |  28 ++++
 .../intermediate/05_background/goal/fr.txt    |  29 ++++
 .../i18n/en.po                                |  25 ++--
 .../intermediate/05_background/i18n/fr.po     |  33 +++++
 .../i18n/it.po                                |  30 ++---
 .../i18n/template.pot                         |  17 +--
 .../{05_control-C => 05_background}/init.sh   |   3 -
 missions/intermediate/05_background/test.sh   |  17 +++
 missions/intermediate/05_control-C/auto.sh    |  24 ----
 .../intermediate/05_control-C/charmiglio.sh   |  96 --------------
 missions/intermediate/05_control-C/clean.sh   |   3 -
 .../intermediate/05_control-C/goal/en.txt     |  28 ----
 .../intermediate/05_control-C/goal/fr.txt     |  29 ----
 missions/intermediate/05_control-C/i18n/fr.po |  42 ------
 .../intermediate/06_control-C/Charmiglio.sh   | 125 ++++++++++++++++++
 missions/intermediate/06_control-C/Makefile   |  41 ++++++
 .../ascii-art/explosion.txt                   |   0
 .../ascii-art/fireworks.txt                   |   0
 missions/intermediate/06_control-C/auto.sh    |  24 ++++
 .../{05_control-C => 06_control-C}/check.sh   |  10 +-
 missions/intermediate/06_control-C/clean.sh   |   3 +
 missions/intermediate/06_control-C/goal.sh    |   5 +
 .../intermediate/06_control-C/goal/en.txt     |  36 +++++
 .../intermediate/06_control-C/goal/fr.txt     |  36 +++++
 missions/intermediate/06_control-C/i18n/en.po |  49 +++++++
 missions/intermediate/06_control-C/i18n/fr.po |  48 +++++++
 missions/intermediate/06_control-C/i18n/it.po |  49 +++++++
 .../06_control-C/i18n/template.pot            |  47 +++++++
 missions/intermediate/06_control-C/init.sh    |  10 ++
 .../{05_control-C => 06_control-C}/test.sh    |   8 +-
 missions/intermediate/index.txt               |   3 +-
 43 files changed, 713 insertions(+), 279 deletions(-)
 rename missions/intermediate/{05_control-C => 05_background}/Makefile (100%)
 create mode 100644 missions/intermediate/05_background/ascii-art/f1
 create mode 100644 missions/intermediate/05_background/ascii-art/f2
 create mode 100644 missions/intermediate/05_background/ascii-art/f3
 create mode 100644 missions/intermediate/05_background/ascii-art/f4
 create mode 100644 missions/intermediate/05_background/ascii-art/f5
 create mode 100644 missions/intermediate/05_background/ascii-art/f6
 create mode 100644 missions/intermediate/05_background/auto.sh
 create mode 100755 missions/intermediate/05_background/charmiglio.sh
 create mode 100644 missions/intermediate/05_background/check.sh
 rename missions/intermediate/{05_control-C => 05_background}/goal.sh (100%)
 create mode 100644 missions/intermediate/05_background/goal/en.txt
 create mode 100644 missions/intermediate/05_background/goal/fr.txt
 rename missions/intermediate/{05_control-C => 05_background}/i18n/en.po (51%)
 create mode 100644 missions/intermediate/05_background/i18n/fr.po
 rename missions/intermediate/{05_control-C => 05_background}/i18n/it.po (50%)
 rename missions/intermediate/{05_control-C => 05_background}/i18n/template.pot (62%)
 rename missions/intermediate/{05_control-C => 05_background}/init.sh (61%)
 create mode 100644 missions/intermediate/05_background/test.sh
 delete mode 100644 missions/intermediate/05_control-C/auto.sh
 delete mode 100755 missions/intermediate/05_control-C/charmiglio.sh
 delete mode 100644 missions/intermediate/05_control-C/clean.sh
 delete mode 100644 missions/intermediate/05_control-C/goal/en.txt
 delete mode 100644 missions/intermediate/05_control-C/goal/fr.txt
 delete mode 100644 missions/intermediate/05_control-C/i18n/fr.po
 create mode 100755 missions/intermediate/06_control-C/Charmiglio.sh
 create mode 100644 missions/intermediate/06_control-C/Makefile
 rename missions/intermediate/{05_control-C => 06_control-C}/ascii-art/explosion.txt (100%)
 rename missions/intermediate/{05_control-C => 06_control-C}/ascii-art/fireworks.txt (100%)
 create mode 100644 missions/intermediate/06_control-C/auto.sh
 rename missions/intermediate/{05_control-C => 06_control-C}/check.sh (50%)
 create mode 100644 missions/intermediate/06_control-C/clean.sh
 create mode 100644 missions/intermediate/06_control-C/goal.sh
 create mode 100644 missions/intermediate/06_control-C/goal/en.txt
 create mode 100644 missions/intermediate/06_control-C/goal/fr.txt
 create mode 100644 missions/intermediate/06_control-C/i18n/en.po
 create mode 100644 missions/intermediate/06_control-C/i18n/fr.po
 create mode 100644 missions/intermediate/06_control-C/i18n/it.po
 create mode 100644 missions/intermediate/06_control-C/i18n/template.pot
 create mode 100644 missions/intermediate/06_control-C/init.sh
 rename missions/intermediate/{05_control-C => 06_control-C}/test.sh (74%)

diff --git a/missions/index.txt b/missions/index.txt
index bf8394f5..01cddc07 100644
--- a/missions/index.txt
+++ b/missions/index.txt
@@ -5,7 +5,8 @@ misc/02_nano_journal
 intermediate/02_alias_journal
 intermediate/03_tab_spider_lair
 intermediate/04_bg_xeyes
-intermediate/05_control-C
+intermediate/05_background
+intermediate/06_control-C
 !finding_files_maze/00_shared
 finding_files_maze/01_ls_cd
 finding_files_maze/02_tree
diff --git a/missions/intermediate/05_control-C/Makefile b/missions/intermediate/05_background/Makefile
similarity index 100%
rename from missions/intermediate/05_control-C/Makefile
rename to missions/intermediate/05_background/Makefile
diff --git a/missions/intermediate/05_background/ascii-art/f1 b/missions/intermediate/05_background/ascii-art/f1
new file mode 100644
index 00000000..4b3118b4
--- /dev/null
+++ b/missions/intermediate/05_background/ascii-art/f1
@@ -0,0 +1,3 @@
+ .:::.
+ :::::
+ ':::'
diff --git a/missions/intermediate/05_background/ascii-art/f2 b/missions/intermediate/05_background/ascii-art/f2
new file mode 100644
index 00000000..40ea2799
--- /dev/null
+++ b/missions/intermediate/05_background/ascii-art/f2
@@ -0,0 +1,4 @@
+   .
+ _\(/_
+ ./)\
+   '
diff --git a/missions/intermediate/05_background/ascii-art/f3 b/missions/intermediate/05_background/ascii-art/f3
new file mode 100644
index 00000000..784393d0
--- /dev/null
+++ b/missions/intermediate/05_background/ascii-art/f3
@@ -0,0 +1,4 @@
+  *''*
+ *_\/_*
+ * /\ *
+  *..*
diff --git a/missions/intermediate/05_background/ascii-art/f4 b/missions/intermediate/05_background/ascii-art/f4
new file mode 100644
index 00000000..ded7a9c4
--- /dev/null
+++ b/missions/intermediate/05_background/ascii-art/f4
@@ -0,0 +1,5 @@
+   :
+'.\'/.'
+-= o =-
+.'/.\'.
+   :
diff --git a/missions/intermediate/05_background/ascii-art/f5 b/missions/intermediate/05_background/ascii-art/f5
new file mode 100644
index 00000000..c6731730
--- /dev/null
+++ b/missions/intermediate/05_background/ascii-art/f5
@@ -0,0 +1,5 @@
+   .
+.'.:.'.
+-=:o:=-
+'.':'.'
+   '
diff --git a/missions/intermediate/05_background/ascii-art/f6 b/missions/intermediate/05_background/ascii-art/f6
new file mode 100644
index 00000000..b3e976ec
--- /dev/null
+++ b/missions/intermediate/05_background/ascii-art/f6
@@ -0,0 +1,4 @@
+  .''.
+ :_\/_:
+ : /\ :
+  '..'
diff --git a/missions/intermediate/05_background/auto.sh b/missions/intermediate/05_background/auto.sh
new file mode 100644
index 00000000..f9bb5b0c
--- /dev/null
+++ b/missions/intermediate/05_background/auto.sh
@@ -0,0 +1,5 @@
+#!/usr/bin/env sh
+
+set -m
+
+charmiglio & charmiglio & charmiglio & gsh check
diff --git a/missions/intermediate/05_background/charmiglio.sh b/missions/intermediate/05_background/charmiglio.sh
new file mode 100755
index 00000000..a11a8b1a
--- /dev/null
+++ b/missions/intermediate/05_background/charmiglio.sh
@@ -0,0 +1,24 @@
+#!/bin/sh
+
+. gsh_gettext.sh
+
+command=$(gettext "charmiglio")
+
+
+file="$MISSION_DIR/ascii-art/f$((1 + $(RANDOM)%6))"
+indent=$(echo "                                       " | head -c "$((4 * ($(RANDOM)%8)))")
+
+rm -f "$GSH_TMP/charmiglio.pids"
+for i in $(seq $((5 + $(RANDOM)%10)))
+do
+  echo "$indent    *"
+  sleep 0.1
+done
+
+awk -v indent="$indent" '{print indent, $0}' < "$file"
+
+echo $$ >> "$GSH_TMP/charmiglio.pids"
+
+sleep 1
+
+exit 0
diff --git a/missions/intermediate/05_background/check.sh b/missions/intermediate/05_background/check.sh
new file mode 100644
index 00000000..1784da88
--- /dev/null
+++ b/missions/intermediate/05_background/check.sh
@@ -0,0 +1,37 @@
+#!/usr/bin/env sh
+
+command="$(gettext 'charmiglio')"
+
+PIDS=$GSH_TMP/charmiglio.pids
+
+_check() {
+    rm -f "$PIDS"
+
+    echo "$(gettext "Let's have a look:")"
+
+    sleep 2
+
+    if [ ! -f "$PIDS" ]
+    then
+        echo "$(gettext "Mmm... I didn't see anything.")"
+        return 1
+    fi
+
+    NB=$(cat "$PIDS" | wc -l)
+    cat $PIDS
+    echo "NB = '$NB'"
+    if [ "$NB" -ge 3 ]
+    then
+        echo "$(gettext "Great, that looked good!")"
+        return 0
+    elif [ "$NB" -lt 3 ]
+    then
+        echo "$(eval_gettext "Mmm... I only saw \$NB fireworks. That's not enough.")"
+        return 1
+    else
+        echo "you shouldn't see this!"
+        return 1
+    fi
+}
+
+_check
diff --git a/missions/intermediate/05_control-C/goal.sh b/missions/intermediate/05_background/goal.sh
similarity index 100%
rename from missions/intermediate/05_control-C/goal.sh
rename to missions/intermediate/05_background/goal.sh
diff --git a/missions/intermediate/05_background/goal/en.txt b/missions/intermediate/05_background/goal/en.txt
new file mode 100644
index 00000000..fc02db19
--- /dev/null
+++ b/missions/intermediate/05_background/goal/en.txt
@@ -0,0 +1,28 @@
+Mission goal
+============
+
+The king's pyrotechnician appears next to you. He asks you to fire **at least 
+3 of them** so he can see them from far away.
+
+A single firework can be created with the magical word
+
+  $command
+
+
+Useful commands
+===============
+
+$command
+  this (non standard) command creates a single small firework
+
+COMMAND &
+  run the given command, but don't wait until it is finished to return
+  The command will run in the "background".
+
+COMMAND1 ; COMMAND2 ; ... ; COMMANDn
+  run the given commands one after the other
+  Each command is run when the previous one is finished.
+
+COMMAND1 & COMMAND2 & ... & COMMANDn
+  run the given commands "in parallel"
+  All the commands are run in the "background", except the last one.
diff --git a/missions/intermediate/05_background/goal/fr.txt b/missions/intermediate/05_background/goal/fr.txt
new file mode 100644
index 00000000..7244ff09
--- /dev/null
+++ b/missions/intermediate/05_background/goal/fr.txt
@@ -0,0 +1,29 @@
+Objectif
+=========
+
+L'artificier royal apparait à vos cotés. Il vous demande de tirer **au moins 3
+jeux d'artifices" pour qu'il puisse les voir de loin.
+
+Une fusée simple peut être lancée avec le mot magique
+
+  $command 
+
+
+Commandes utiles
+================
+
+$command
+  cette commande (non standard) lance un feu d'artifice simple
+
+COMMANDE &
+  exécute la commande mais n'attend pas qu'elle soit terminée pour reprendre
+  l'exécution du shell
+  La commande s'exécute "en arrière plan".
+
+COMMAND1 ; COMMAND2 ; ... ; COMMANDn
+  exécute les commandes données, l'une après l'autre
+  Chaque commande est exécutée lorsque la précédente est terminée.
+
+COMMAND1 & COMMAND2 & ... & COMMANDn
+  exécute les commandes données, "en parallèle"
+  Toutes les commandes sont exécutées "en arrière plan", sauf la dernière.
diff --git a/missions/intermediate/05_control-C/i18n/en.po b/missions/intermediate/05_background/i18n/en.po
similarity index 51%
rename from missions/intermediate/05_control-C/i18n/en.po
rename to missions/intermediate/05_background/i18n/en.po
index f0ed9f4d..e9081ea2 100644
--- a/missions/intermediate/05_control-C/i18n/en.po
+++ b/missions/intermediate/05_background/i18n/en.po
@@ -16,24 +16,19 @@ msgstr  "$MISSION_DIR/skip/en.txt"
 msgid   "$MISSION_DIR/treasure-msg/en.txt"
 msgstr  "$MISSION_DIR/treasure-msg/en.txt"
 
-msgid   "Don't interrupt me when I'm in a trance!!!"
-msgstr  "Don't interrupt me when I'm in a trance!!!"
+msgid   "Great, that looked good!"
+msgstr  "Great, that looked good!"
 
-#, sh-format
-msgid   "Found it! The special incantation is $n"
-msgstr  "Found it! The special incantation is $n"
-
-msgid   "Merlin mumbles "
-msgstr  "Merlin mumbles "
-
-msgid   "NOTE: you need to interrupt Merlin before he wakes up."
-msgstr  "NOTE: you need to interrupt Merlin before he wakes up."
+msgid   "Let's have a look:"
+msgstr  "Let's have a look:"
 
-msgid   "Sorry, I fell asleep... Let's try again."
-msgstr  "Sorry, I fell asleep... Let's try again."
+#, sh-format
+msgid   "Mmm... I didn't see anything."
+msgstr  "Mmm... I didn't see anything."
 
-msgid   "What's the fireworks incantation?"
-msgstr  "What's the fireworks incantation?"
+#, sh-format
+msgid   "Mmm... I only saw $NB fireworks. That's not enough."
+msgstr  "Mmm... I only saw $NB fireworks. That's not enough."
 
 msgid   "charmiglio"
 msgstr  "charmiglio"
diff --git a/missions/intermediate/05_background/i18n/fr.po b/missions/intermediate/05_background/i18n/fr.po
new file mode 100644
index 00000000..5347729e
--- /dev/null
+++ b/missions/intermediate/05_background/i18n/fr.po
@@ -0,0 +1,33 @@
+msgid   ""
+msgstr  "Content-Type: text/plain; charset=UTF-8\n"
+        "Content-Transfer-Encoding: 8bit\n"
+
+# path for the text file containing the goal
+#, sh-format
+msgid   "$MISSION_DIR/goal/en.txt"
+msgstr  "$MISSION_DIR/goal/fr.txt"
+
+# path for the text file containing the skip message
+msgid   "$MISSION_DIR/skip/en.txt"
+msgstr  "$MISSION_DIR/skip/fr.txt"
+
+# path for the text file containing the treasure message
+msgid   "$MISSION_DIR/treasure-msg/en.txt"
+msgstr  "$MISSION_DIR/treasure-msg/fr.txt"
+
+msgid   "Great, that looked good!"
+msgstr  "Super, c'était très joli !"
+
+msgid   "Let's have a look:"
+msgstr  "Regardons à quoi ça ressemble :"
+
+#, sh-format
+msgid   "Mmm... I didn't see anything."
+msgstr  "Mmm... Je n'ai rien vu."
+
+#, sh-format
+msgid   "Mmm... I only saw $NB fireworks. That's not enough."
+msgstr  "Mmm... Je n'ai vu que $NB feux d'artifices. Ce n'est pas assez."
+
+msgid   "charmiglio"
+msgstr  "charmiglio"
diff --git a/missions/intermediate/05_control-C/i18n/it.po b/missions/intermediate/05_background/i18n/it.po
similarity index 50%
rename from missions/intermediate/05_control-C/i18n/it.po
rename to missions/intermediate/05_background/i18n/it.po
index 3f142971..cfe0e351 100644
--- a/missions/intermediate/05_control-C/i18n/it.po
+++ b/missions/intermediate/05_background/i18n/it.po
@@ -1,3 +1,4 @@
+# AUTOMATICALLY GENERATED -- DO NOT EDIT
 msgid   ""
 msgstr  "Content-Type: text/plain; charset=UTF-8\n"
         "Content-Transfer-Encoding: 8bit\n"
@@ -5,7 +6,7 @@ msgstr  "Content-Type: text/plain; charset=UTF-8\n"
 # path for the text file containing the goal
 #, sh-format
 msgid   "$MISSION_DIR/goal/en.txt"
-msgstr  "$MISSION_DIR/goal/it.txt"
+msgstr  "$MISSION_DIR/goal/en.txt"
 
 # path for the text file containing the skip message
 msgid   "$MISSION_DIR/skip/en.txt"
@@ -15,24 +16,19 @@ msgstr  ""
 msgid   "$MISSION_DIR/treasure-msg/en.txt"
 msgstr  ""
 
-msgid   "Don't interrupt me when I'm in a trance!!!"
-msgstr  ""
-
-#, sh-format
-msgid   "Found it! The special incantation is $n"
-msgstr  ""
-
-msgid   "Merlin mumbles "
-msgstr  ""
+msgid   "Great, that looked good!"
+msgstr  "Great, that looked good!"
 
-msgid   "NOTE: you need to interrupt Merlin before he wakes up."
-msgstr  ""
+msgid   "Let's have a look:"
+msgstr  "Let's have a look:"
 
-msgid   "Sorry, I fell asleep... Let's try again."
-msgstr  ""
+#, sh-format
+msgid   "Mmm... I didn't see anything."
+msgstr  "Mmm... I didn't see anything."
 
-msgid   "What's the fireworks incantation?"
-msgstr  ""
+#, sh-format
+msgid   "Mmm... I only saw $NB fireworks. That's not enough."
+msgstr  "Mmm... I only saw $NB fireworks. That's not enough."
 
 msgid   "charmiglio"
-msgstr  ""
+msgstr  "charmiglio"
diff --git a/missions/intermediate/05_control-C/i18n/template.pot b/missions/intermediate/05_background/i18n/template.pot
similarity index 62%
rename from missions/intermediate/05_control-C/i18n/template.pot
rename to missions/intermediate/05_background/i18n/template.pot
index 9d60e3bd..b96ab195 100644
--- a/missions/intermediate/05_control-C/i18n/template.pot
+++ b/missions/intermediate/05_background/i18n/template.pot
@@ -15,23 +15,18 @@ msgstr  ""
 msgid   "$MISSION_DIR/treasure-msg/en.txt"
 msgstr  ""
 
-msgid   "Don't interrupt me when I'm in a trance!!!"
+msgid   "Great, that looked good!"
 msgstr  ""
 
-#, sh-format
-msgid   "Found it! The special incantation is $n"
-msgstr  ""
-
-msgid   "Merlin mumbles "
+msgid   "Let's have a look:"
 msgstr  ""
 
-msgid   "NOTE: you need to interrupt Merlin before he wakes up."
-msgstr  ""
-
-msgid   "Sorry, I fell asleep... Let's try again."
+#, sh-format
+msgid   "Mmm... I didn't see anything."
 msgstr  ""
 
-msgid   "What's the fireworks incantation?"
+#, sh-format
+msgid   "Mmm... I only saw $NB fireworks. That's not enough."
 msgstr  ""
 
 msgid   "charmiglio"
diff --git a/missions/intermediate/05_control-C/init.sh b/missions/intermediate/05_background/init.sh
similarity index 61%
rename from missions/intermediate/05_control-C/init.sh
rename to missions/intermediate/05_background/init.sh
index ea16e3e9..4e0fba64 100644
--- a/missions/intermediate/05_control-C/init.sh
+++ b/missions/intermediate/05_background/init.sh
@@ -1,9 +1,6 @@
 #!/usr/bin/env sh
 
 _mission_init() {
-  # nb of tries to make
-  echo $((3 + $(RANDOM) % 3)) > "$GSH_TMP/control-C"
-
   copy_bin "$MISSION_DIR/charmiglio.sh" "$GSH_BIN/$(gettext charmiglio)"
 }
 _mission_init
diff --git a/missions/intermediate/05_background/test.sh b/missions/intermediate/05_background/test.sh
new file mode 100644
index 00000000..52135504
--- /dev/null
+++ b/missions/intermediate/05_background/test.sh
@@ -0,0 +1,17 @@
+#!/usr/bin/env sh
+
+set -m
+
+gsh assert check false
+charmiglio & gsh assert check false
+charmiglio & charmiglio & gsh assert check false
+charmiglio & charmiglio & charmiglio & gsh assert check true
+charmiglio & charmiglio & charmiglio & charmiglio & gsh assert check true
+
+charmiglio & charmiglio & charmiglio
+gsh assert check false
+
+charmiglio; charmiglio; charmiglio;
+gsh assert check false
+
+
diff --git a/missions/intermediate/05_control-C/auto.sh b/missions/intermediate/05_control-C/auto.sh
deleted file mode 100644
index 4dc721f7..00000000
--- a/missions/intermediate/05_control-C/auto.sh
+++ /dev/null
@@ -1,24 +0,0 @@
-#!/usr/bin/env sh
-
-set -m
-
-for _ in $(seq 6)
-do
-  eval "$(gettext charmiglio)" 2>/dev/null &
-  PID=$!
-  sleep 3
-  kill -s INT "-$PID" 2> /dev/null
-
-  case "$(cat "$GSH_TMP/control-C")" in
-    *[!0-9]*)
-      break
-      ;;
-    *)
-      :
-      ;;
-  esac
-done
-
-gsh check < "$GSH_TMP/control-C"
-
-
diff --git a/missions/intermediate/05_control-C/charmiglio.sh b/missions/intermediate/05_control-C/charmiglio.sh
deleted file mode 100755
index c1583a16..00000000
--- a/missions/intermediate/05_control-C/charmiglio.sh
+++ /dev/null
@@ -1,96 +0,0 @@
-#!/bin/sh
-
-. gsh_gettext.sh
-
-control_c_start() {
-  [ -f "$GSH_TMP/control-C" ] || exit 255
-  n=$(cat "$GSH_TMP/control-C")
-  case "$n" in
-    "" | *[!0-9]* )
-      echo
-      echo
-      echo "$(eval_gettext 'Found it! The special incantation is $n')"
-      ;;
-    *)
-      echo
-      echo
-      echo "$(gettext "Don't interrupt me when I'm in a trance!!!")"
-      ;;
-  esac
-  exit 1
-}
-
-control_c_end() {
-  [ -f "$GSH_TMP/control-C" ] || exit 255
-  n=$(cat "$GSH_TMP/control-C")
-  case "$n" in
-    "" | *[!0-9]* )
-      echo
-      echo
-      echo "$(eval_gettext 'Found it! The special incantation is $n')"
-      ;;
-    *)
-      echo "$((n-1))" > "$GSH_TMP/control-C"
-      echo
-      echo
-      echo "$(gettext "Sorry, I fell asleep... Let's try again.")"
-      ;;
-    esac
-  exit 1
-}
-
-mumble() {
-  seconds=$1    # how long to mumble randomly (real time will be between $seconds and $seconds+1
-  sleep=$2      # should '.' characters appears as times passes
-
-  now=$(date +%s)
-  d=0
-  while [ "$d"  -le "$seconds" ]
-  do
-    d=$(($(date +%s) - now + 1))
-    printf "$(gettext "Merlin mumbles ")"  >&2
-    if [ "$sleep" ]
-    then
-      # generate a string of length 26 containing more and more '.' characters
-      i=$((d*2))
-      alpha=$(echo "xnyjqmiwkgbplvadrhfuotcsez.........................." | awk "{print substr(\$0, $i<27?$i:27, 26)}" )
-    else
-      alpha="a-z"
-    fi
-    random_string "$((8 + $(RANDOM)%42))" | tr "a-zA-Z" "$alpha " >&2
-    sleep 0.1
-  done
-}
-
-check() {
-  [ -f "$GSH_TMP/control-C" ] || exit 255
-  n=$(cat "$GSH_TMP/control-C")
-  case "$n" in
-    "" | *[!0-9]* )
-      # we already know the solution
-      echo
-      echo "$(eval_gettext 'Found it! The special incantation is $n')"
-      exit 0
-      ;;
-    *)
-      if [ "$n" -le 0 ]
-      then
-        # if we've finished, print the solution and save it
-        n=$(random_string 5)
-        echo "$n" > "$GSH_TMP/control-C"
-        echo
-        echo "$(eval_gettext 'Found it! The special incantation is $n')"
-        exit 0
-      fi
-  esac
-}
-
-trap 'control_c_start' INT
-mumble 2      # mumble for 2 second
-check
-trap 'control_c_end' INT
-mumble 120 sleep # mumble for 2 minutes, falling to sleep
-echo
-echo "$(gettext "Sorry, I fell asleep... Let's try again.")"
-
-echo "$(gettext "NOTE: you need to interrupt Merlin before he wakes up.")"
diff --git a/missions/intermediate/05_control-C/clean.sh b/missions/intermediate/05_control-C/clean.sh
deleted file mode 100644
index f230756a..00000000
--- a/missions/intermediate/05_control-C/clean.sh
+++ /dev/null
@@ -1,3 +0,0 @@
-#!/usr/bin/env sh
-
-rm -f "$GSH_TMP/control-C"
diff --git a/missions/intermediate/05_control-C/goal/en.txt b/missions/intermediate/05_control-C/goal/en.txt
deleted file mode 100644
index 506b3073..00000000
--- a/missions/intermediate/05_control-C/goal/en.txt
+++ /dev/null
@@ -1,28 +0,0 @@
-Mission goal
-============
-
-The wizard Merlin appears next to you and asks for your help. 
-You need to whisper the magic word
-  $ $command
-to put him into a trance so that he can remember a special 
-incantation for creating fireworks.
-
-The only problem is that after a couple of seconds in a trance, 
-Merlin falls asleep! You thus need to interrupt him whenever 
-that's the case, so that he can try again.
-
-
-NOTE: it will probably take several tries before Merlin 
-actually remembers the incantation
-
-
-Useful commands
-===============
-
-$command
-  this (non standard) command puts Merlin into a trance
-
-Control-c       (also written ^c)
-  pressing Control and c at the same times interrupts the current command 
-  by sending the INT ("INTerrupt") signal to the process
-
diff --git a/missions/intermediate/05_control-C/goal/fr.txt b/missions/intermediate/05_control-C/goal/fr.txt
deleted file mode 100644
index 18b6e95a..00000000
--- a/missions/intermediate/05_control-C/goal/fr.txt
+++ /dev/null
@@ -1,29 +0,0 @@
-Objectif
-=========
-
-Le sorcier Merlin apparait à vos cotés et vous demande de 
-l'aide. Vous devez murmurer le mot magique
-  $ $command
-pour le mettre dans une transe qui devrait lui permettre de 
-se souvenir d'une incantation spéciale pour créer des feux 
-d'artifice.
-
-Le seul problème est qu'après quelques secondes en transe, 
-Merlin s'endort ! Vous devez donc l'interrompre dans ce cas 
-pour qu'il puisse ré-essayer.
-
-
-NOTE: il faudra probablement plusieurs essais pour que 
-Merlin retrouve son incantation.
-
-
-Commandes utiles
-================
-
-$command
-  cette commande (non standard) met Merlin dans une transe
-
-Contrôle-c       (aussi noté ^c)
-  appuyer sur les touches Contrôle et c en même temps interrompt 
-  la commande en cours en envoyant le signal INT ("INTerrupt") au 
-  processus
diff --git a/missions/intermediate/05_control-C/i18n/fr.po b/missions/intermediate/05_control-C/i18n/fr.po
deleted file mode 100644
index 1101d704..00000000
--- a/missions/intermediate/05_control-C/i18n/fr.po
+++ /dev/null
@@ -1,42 +0,0 @@
-msgid   ""
-msgstr  "Content-Type: text/plain; charset=UTF-8\n"
-        "Content-Transfer-Encoding: 8bit\n"
-
-# path for the text file containing the goal
-#, sh-format
-msgid   "$MISSION_DIR/goal/en.txt"
-msgstr  "$MISSION_DIR/goal/fr.txt"
-
-# path for the text file containing the skip message
-msgid   "$MISSION_DIR/skip/en.txt"
-msgstr  ""
-
-# path for the text file containing the treasure message
-msgid   "$MISSION_DIR/treasure-msg/en.txt"
-msgstr  ""
-
-msgid   "Don't interrupt me when I'm in a trance!!!"
-msgstr  "Ne m'interromps pas pendant ma transe !!!"
-
-#, sh-format
-msgid   "Found it! The special incantation is $n"
-msgstr  "Trouvé ! L'incantation spéciale est $n"
-
-msgid   "Merlin mumbles "
-msgstr  "Merlin marmonne "
-
-msgid   "NOTE: you need to interrupt Merlin before he wakes up."
-msgstr  "NOTE : vous devez interrompre Merlin avant son réveil."
-
-msgid   "Sorry, I fell asleep... Let's try again."
-msgstr  "Désolé, je m'étais endormi... Essayons encore."
-
-msgid   "What's the fireworks incantation?"
-msgstr  "Quelle est l'incantation pour les feux d'artifice ?"
-
-msgid   "charmiglio"
-msgstr  "charmiglio"
-
-#, fuzzy, sh-format
-#~ msgid        "Found it! The special incantion is $n"
-#~ msgstr       "Trouvé ! L'incantation spéciale est $n"
diff --git a/missions/intermediate/06_control-C/Charmiglio.sh b/missions/intermediate/06_control-C/Charmiglio.sh
new file mode 100755
index 00000000..31edfa94
--- /dev/null
+++ b/missions/intermediate/06_control-C/Charmiglio.sh
@@ -0,0 +1,125 @@
+#!/bin/sh
+
+. gsh_gettext.sh
+
+CODE=$1
+STATE=init
+
+trap 'control_c' INT
+control_c() {
+  if [ "$STATE" = "init" ]
+  then
+    echo
+    echo "$(eval_gettext 'Too soon! You must leave enough time for the magical reaction to start!')"
+    exit 1
+  else
+    echo
+    cat "$MISSION_DIR/ascii-art/explosion.txt"
+    echo "$(gettext "That's not working, try a different combination...")"
+  fi
+  exit 1
+}
+
+
+indent=8
+width=16
+magical_reaction() {
+  seconds=$1    # how long to magical_reaction randomly (real time will be between $seconds and $seconds+1
+  dud=$2      # should more '.' characters appears as times passes
+
+  now=$(date +%s)
+  delay=0
+  while [ "$delay"  -le "$seconds" ]
+  do
+    delay=$(($(date +%s) - now))
+    # NOTE: if I put $(RANDOM) inside the $((...)), interrupting the process during
+    # the RANDOM execution returns an empty string, and the shell complains about
+    # invalid arithmetic expression
+    r=$(RANDOM)
+    indent=$((indent - 2 + r%5))
+    [ "$indent" -lt 0 ] && indent=0
+    r=$(RANDOM)
+    width=$((width - 2 + r%5))
+    [ "$width" -lt 1 ] && width=1
+    if [ "$dud" ]
+    then
+      i=$((delay/2 + 2))
+    else
+      i=1
+    fi
+    alpha=$(echo "#%*():_-............." | awk "{print substr(\$0, $i<10?$i:10, 10)}" )
+    printf "%*s%s\n" "$indent" '' "$(random_string "$width" "$alpha")" >&2
+    sleep 0.1
+  done
+}
+
+check() {
+  [ -f "$GSH_TMP/control-C" ] || exit 255
+  n=$(cat "$GSH_TMP/control-C")
+  case "$n" in
+    "" | *[!0-9]* )
+      if [ "$n" = "$CODE" ]
+      then
+        echo
+        echo "$(eval_gettext 'It works! The special incantation is $CODE')"
+        cat "$MISSION_DIR/ascii-art/fireworks.txt"
+        exit 0
+      else
+        echo "$CODE" >> "$GSH_TMP/control-C.codes"
+      fi
+      ;;
+    *)
+      if [ "$n" -le 0 ]
+      then
+        # if we've finished, print the solution and save it
+        echo "$CODE" > "$GSH_TMP/control-C"
+        echo
+        echo "$(eval_gettext 'It works! The special incantation is $CODE')"
+        cat "$MISSION_DIR/ascii-art/fireworks.txt"
+        exit 0
+      else
+        echo "$CODE" >> "$GSH_TMP/control-C.codes"
+        echo "$((n-1))" > "$GSH_TMP/control-C"
+      fi
+  esac
+  STATE="final"
+}
+
+init() {
+  case "$CODE" in
+    "")
+      command=$(gettext "Charmiglio")
+      echo "$(eval_gettext 'usage: $command CCCC
+      where CCCC is a sequence of 4 ASCII letters (a-zA-Z)')"
+      exit 1
+      ;;
+
+    *[!a-zA-Z]*)
+      echo "$(gettext "The incantation can only use ASCII letters.")"
+      exit 1
+      ;;
+    ????)
+      :     # 4 letters, OK
+      ;;
+    *)
+      echo "$(gettext "The incantation requires exactly 4 letters.")"
+      exit 1
+      ;;
+  esac
+
+  if grep -qsx "$CODE" "$GSH_TMP/control-C.codes"
+  then
+    echo "already tried!"
+    exit 1
+  fi
+}
+
+
+init
+magical_reaction 2      # magical reaction for 2 second
+check
+magical_reaction 600 dud # dud for 10 minutes
+
+echo
+echo "$(gettext "That's not working, try a different combination...")"
+echo "$(gettext "NOTE: you should interrupt the magical reaction after a few seconds!")"
diff --git a/missions/intermediate/06_control-C/Makefile b/missions/intermediate/06_control-C/Makefile
new file mode 100644
index 00000000..bd85007b
--- /dev/null
+++ b/missions/intermediate/06_control-C/Makefile
@@ -0,0 +1,41 @@
+SH_FILES=$(wildcard *.sh)
+EXCEPTIONS=
+OTHER_FILES=
+
+LANGUAGES=$(wildcard i18n/*.po)
+LANGUAGES:=$(filter-out i18n/en.po, $(LANGUAGES))
+SH_FILES:=$(filter-out $(EXCEPTIONS), $(SH_FILES))
+SORT=--sort-output
+OPTIONS=--indent --no-wrap --no-location
+
+all: i18n/en.po $(LANGUAGES)
+
+add-locations: SORT=--add-location --sort-by-file
+add-locations: all
+
+i18n/en.po: i18n/template.pot FORCE
+	@echo "msgen $@"
+	@msgen $(OPTIONS) $(SORT) i18n/template.pot --output=$@
+	@echo "# AUTOMATICALLY GENERATED -- DO NOT EDIT" | cat - $@ > $@~
+	@mv $@~ $@
+
+$(LANGUAGES):%.po: i18n/template.pot FORCE
+	@echo "msgmerge $@"
+	@msgmerge --update $(OPTIONS) $(SORT) $@ i18n/template.pot
+
+i18n/template.pot: $(SH_FILES) $(OTHER_FILES) FORCE
+	@mkdir -p i18n/
+	@echo "generating i18n/template.pot"
+	@xgettext --from-code=UTF-8 --omit-header $(OPTIONS) $(SORT) --join-existing --output i18n/template.pot $(SH_FILES) $(OTHER_FILES)
+	@echo "done"
+
+new: i18n/template.pot
+	@read -p "language code: " lang; \
+		[ -e "./i18n/$$lang.po" ] && echo "file i18n/$$lang.po already exists" && exit; \
+		echo "file i18n/$$lang.po created"; \
+		msgcat $(OPTIONS) --output i18n/$$lang.po i18n/template.pot
+
+clean:
+	rm -f i18n/*~
+
+.PHONY: all clean new FORCE
diff --git a/missions/intermediate/05_control-C/ascii-art/explosion.txt b/missions/intermediate/06_control-C/ascii-art/explosion.txt
similarity index 100%
rename from missions/intermediate/05_control-C/ascii-art/explosion.txt
rename to missions/intermediate/06_control-C/ascii-art/explosion.txt
diff --git a/missions/intermediate/05_control-C/ascii-art/fireworks.txt b/missions/intermediate/06_control-C/ascii-art/fireworks.txt
similarity index 100%
rename from missions/intermediate/05_control-C/ascii-art/fireworks.txt
rename to missions/intermediate/06_control-C/ascii-art/fireworks.txt
diff --git a/missions/intermediate/06_control-C/auto.sh b/missions/intermediate/06_control-C/auto.sh
new file mode 100644
index 00000000..63e4eb2c
--- /dev/null
+++ b/missions/intermediate/06_control-C/auto.sh
@@ -0,0 +1,24 @@
+#!/usr/bin/env sh
+
+set -m
+
+  for c in a b c d e f
+  do
+    eval "$(gettext Charmiglio)" "$c$c$c$c" 2>/dev/null &
+    PID=$!
+    sleep 4
+    kill -s INT "-$PID" 2> /dev/null
+
+    case "$(cat "$GSH_TMP/control-C")" in
+      *[!0-9]*)
+        break
+        ;;
+      *)
+        :
+        ;;
+    esac
+  done
+
+gsh check < "$GSH_TMP/control-C"
+
+
diff --git a/missions/intermediate/05_control-C/check.sh b/missions/intermediate/06_control-C/check.sh
similarity index 50%
rename from missions/intermediate/05_control-C/check.sh
rename to missions/intermediate/06_control-C/check.sh
index f70584c0..4497b37f 100644
--- a/missions/intermediate/05_control-C/check.sh
+++ b/missions/intermediate/06_control-C/check.sh
@@ -2,22 +2,22 @@
 
 _mission_check() {
   r=$(cat "$GSH_TMP/control-C")
-  printf "%s " "$(gettext "What's the fireworks incantation?")"
+  printf "%s " "$(gettext "What's a valid 4 letters sequence?")"
   read -r n
 
   case "$r" in
-    "" | *[!0-9]*)
+    *[!a-zA-Z]*)
+      return 1
+      ;;
+    ????)
       if [ "$n" = "$r" ]
       then
-        cat "$MISSION_DIR/ascii-art/fireworks.txt"
         return 0
       else
-        cat "$MISSION_DIR/ascii-art/explosion.txt"
         return 1
       fi
       ;;
     *)
-      cat "$MISSION_DIR/ascii-art/explosion.txt"
       return 1
   esac
 }
diff --git a/missions/intermediate/06_control-C/clean.sh b/missions/intermediate/06_control-C/clean.sh
new file mode 100644
index 00000000..01fe2e36
--- /dev/null
+++ b/missions/intermediate/06_control-C/clean.sh
@@ -0,0 +1,3 @@
+#!/usr/bin/env sh
+
+rm -f "$GSH_TMP/control-C*"
diff --git a/missions/intermediate/06_control-C/goal.sh b/missions/intermediate/06_control-C/goal.sh
new file mode 100644
index 00000000..2edb9b32
--- /dev/null
+++ b/missions/intermediate/06_control-C/goal.sh
@@ -0,0 +1,5 @@
+#!/usr/bin/env sh
+
+command="$(gettext 'Charmiglio')"
+sed "s/\\\$command/$command/g" "$(eval_gettext '$MISSION_DIR/goal/en.txt')"
+unset command
diff --git a/missions/intermediate/06_control-C/goal/en.txt b/missions/intermediate/06_control-C/goal/en.txt
new file mode 100644
index 00000000..0557f438
--- /dev/null
+++ b/missions/intermediate/06_control-C/goal/en.txt
@@ -0,0 +1,36 @@
+Mission goal
+============
+
+The king's pyrotechnician is trying to remember the magical incantation 
+for creating the grand finale for his fireworks. This incantation starts 
+with the work $command and must be followed by four random letters, as 
+in
+
+  $ $command abcd
+or
+  $ $command oops
+
+Help the pyrotechnician by finding 4 letters producing appropriate 
+fireworks.
+
+
+NOTE: when the four letters are incorrect, the magical reaction 
+can take a very long time. You need to interrupt it!
+
+It will probably take several tries before finding a combination 
+of letters that works.
+
+
+Useful commands
+===============
+
+$command CCCC
+  this (non standard) command creates some fireworks
+    - if the four letters are valid, the fireworks will start after a few 
+      seconds
+    - if the four letters are not valid, the whole magical reaction will go 
+      on for a long time
+
+Control-c       (also written ^c)
+  pressing Control and c at the same times interrupts the current command 
+  by sending the INT ("INTerrupt") signal to the process
diff --git a/missions/intermediate/06_control-C/goal/fr.txt b/missions/intermediate/06_control-C/goal/fr.txt
new file mode 100644
index 00000000..b9de6d5b
--- /dev/null
+++ b/missions/intermediate/06_control-C/goal/fr.txt
@@ -0,0 +1,36 @@
+Objectif
+=========
+
+L'artificier royal essaie de se souvenir de l'incantation magique qui génère 
+le bouquet final de son grand feu d'artifices. Cette incantation commence par 
+le mot $command et doit être suivie de quatre lettres aléatoires comme dans
+
+  $ $command abcd
+ou
+  $ $command oups
+
+Aidez l'artificier en trouvant quatres lettres qui produisent un feu
+d'artifices approprié.
+
+
+NOTE: lorsque les quatres lettres sont incorrectes, la réaction 
+magique peut prendre beaucoup de temps. Il faudra l'interrompre !
+
+Il est probable que vous deviez faire plusieurs essais pour 
+trouver une suite de quatre lettres qui fonctionne.
+
+
+Commandes utiles
+================
+
+$command CCCC
+  cette commande (non standard) génère un feu d'artifice
+    - si les quatre lettres sont valides, le feu d'artifice partira 
+      au bout de quelques secondes
+    - si les quatres lettres ne sont pas valides, la réaction magique 
+      continuera pendant longtemps
+
+Contrôle-c       (aussi noté ^c)
+  appuyer sur les touches Contrôle et c en même temps interrompt 
+  la commande en cours en envoyant le signal INT ("INTerrupt") au 
+  processus
diff --git a/missions/intermediate/06_control-C/i18n/en.po b/missions/intermediate/06_control-C/i18n/en.po
new file mode 100644
index 00000000..a9a48bdc
--- /dev/null
+++ b/missions/intermediate/06_control-C/i18n/en.po
@@ -0,0 +1,49 @@
+# AUTOMATICALLY GENERATED -- DO NOT EDIT
+msgid   ""
+msgstr  "Content-Type: text/plain; charset=UTF-8\n"
+        "Content-Transfer-Encoding: 8bit\n"
+
+# path for the text file containing the goal
+#, sh-format
+msgid   "$MISSION_DIR/goal/en.txt"
+msgstr  "$MISSION_DIR/goal/en.txt"
+
+# path for the text file containing the skip message
+msgid   "$MISSION_DIR/skip/en.txt"
+msgstr  "$MISSION_DIR/skip/en.txt"
+
+# path for the text file containing the treasure message
+msgid   "$MISSION_DIR/treasure-msg/en.txt"
+msgstr  "$MISSION_DIR/treasure-msg/en.txt"
+
+msgid   "Charmiglio"
+msgstr  "Charmiglio"
+
+#, sh-format
+msgid   "It works! The special incantation is $CODE"
+msgstr  "It works! The special incantation is $CODE"
+
+msgid   "NOTE: you should interrupt the magical reaction after a few seconds!"
+msgstr  "NOTE: you should interrupt the magical reaction after a few seconds!"
+
+msgid   "That's not working, try a different combination..."
+msgstr  "That's not working, try a different combination..."
+
+msgid   "The incantation can only use ASCII letters."
+msgstr  "The incantation can only use ASCII letters."
+
+msgid   "The incantation requires exactly 4 letters."
+msgstr  "The incantation requires exactly 4 letters."
+
+#, sh-format
+msgid   "Too soon! You must leave enough time for the magical reaction to start!"
+msgstr  "Too soon! You must leave enough time for the magical reaction to start!"
+
+msgid   "What's a valid 4 letters sequence?"
+msgstr  "What's a valid 4 letters sequence?"
+
+#, sh-format
+msgid   "usage: $command CCCC\n"
+        "      where CCCC is a sequence of 4 ASCII letters (a-zA-Z)"
+msgstr  "usage: $command CCCC\n"
+        "      where CCCC is a sequence of 4 ASCII letters (a-zA-Z)"
diff --git a/missions/intermediate/06_control-C/i18n/fr.po b/missions/intermediate/06_control-C/i18n/fr.po
new file mode 100644
index 00000000..48a249ed
--- /dev/null
+++ b/missions/intermediate/06_control-C/i18n/fr.po
@@ -0,0 +1,48 @@
+msgid   ""
+msgstr  "Content-Type: text/plain; charset=UTF-8\n"
+        "Content-Transfer-Encoding: 8bit\n"
+
+# path for the text file containing the goal
+#, sh-format
+msgid   "$MISSION_DIR/goal/en.txt"
+msgstr  "$MISSION_DIR/goal/fr.txt"
+
+# path for the text file containing the skip message
+msgid   "$MISSION_DIR/skip/en.txt"
+msgstr  ""
+
+# path for the text file containing the treasure message
+msgid   "$MISSION_DIR/treasure-msg/en.txt"
+msgstr  ""
+
+msgid   "Charmiglio"
+msgstr  "Charmiglio"
+
+#, sh-format
+msgid   "It works! The special incantation is $CODE"
+msgstr  "Ça marche ! L'incantation spéciale est $CODE"
+
+msgid   "NOTE: you should interrupt the magical reaction after a few seconds!"
+msgstr  "NOTE : vous devriez interrompre la réaction magique après quelques secondes !"
+
+msgid   "That's not working, try a different combination..."
+msgstr  "Ça ne marche pas, essayez une autre combinaison..."
+
+msgid   "The incantation can only use ASCII letters."
+msgstr  "L'incantation ne peut utiliser que des lettres ASCII."
+
+msgid   "The incantation requires exactly 4 letters."
+msgstr  "L'incantation nécessite exactement 4 lettres."
+
+#, sh-format
+msgid   "Too soon! You must leave enough time for the magical reaction to start!"
+msgstr  "Trop tôt ! Vous devez laisser assez de temps pour que la réaction magique commence !"
+
+msgid   "What's a valid 4 letters sequence?"
+msgstr  "Qu'est-ce qu'une combinaison valide ?"
+
+#, sh-format
+msgid   "usage: $command CCCC\n"
+        "      where CCCC is a sequence of 4 ASCII letters (a-zA-Z)"
+msgstr  "utilisation : $command CCCC\n"
+        "      où CCCC est une suite de 4 lettres ASCII (a-zA-Z)"
diff --git a/missions/intermediate/06_control-C/i18n/it.po b/missions/intermediate/06_control-C/i18n/it.po
new file mode 100644
index 00000000..693fda76
--- /dev/null
+++ b/missions/intermediate/06_control-C/i18n/it.po
@@ -0,0 +1,49 @@
+# AUTOMATICALLY GENERATED -- DO NOT EDIT
+msgid   ""
+msgstr  "Content-Type: text/plain; charset=UTF-8\n"
+        "Content-Transfer-Encoding: 8bit\n"
+
+# path for the text file containing the goal
+#, sh-format
+msgid   "$MISSION_DIR/goal/en.txt"
+msgstr  "$MISSION_DIR/goal/en.txt"
+
+# path for the text file containing the skip message
+msgid   "$MISSION_DIR/skip/en.txt"
+msgstr  ""
+
+# path for the text file containing the treasure message
+msgid   "$MISSION_DIR/treasure-msg/en.txt"
+msgstr  ""
+
+msgid   "Charmiglio"
+msgstr  "Charmiglio"
+
+#, sh-format
+msgid   "It works! The special incantation is $CODE"
+msgstr  "It works! The special incantation is $CODE"
+
+msgid   "NOTE: you should interrupt the magical reaction after a few seconds!"
+msgstr  "NOTE: you should interrupt the magical reaction after a few seconds!"
+
+msgid   "That's not working, try a different combination..."
+msgstr  "That's not working, try a different combination..."
+
+msgid   "The incantation can only use ASCII letters."
+msgstr  "The incantation can only use ASCII letters."
+
+msgid   "The incantation requires exactly 4 letters."
+msgstr  "The incantation requires exactly 4 letters."
+
+#, sh-format
+msgid   "Too soon! You must leave enough time for the magical reaction to start!"
+msgstr  "Too soon! You must leave enough time for the magical reaction to start!"
+
+msgid   "What's a valid 4 letters sequence?"
+msgstr  "What's a valid 4 letters sequence?"
+
+#, sh-format
+msgid   "usage: $command CCCC\n"
+        "      where CCCC is a sequence of 4 ASCII letters (a-zA-Z)"
+msgstr  "usage: $command CCCC\n"
+        "      where CCCC is a sequence of 4 ASCII letters (a-zA-Z)"
diff --git a/missions/intermediate/06_control-C/i18n/template.pot b/missions/intermediate/06_control-C/i18n/template.pot
new file mode 100644
index 00000000..416128ee
--- /dev/null
+++ b/missions/intermediate/06_control-C/i18n/template.pot
@@ -0,0 +1,47 @@
+msgid   ""
+msgstr  "Content-Type: text/plain; charset=UTF-8\n"
+        "Content-Transfer-Encoding: 8bit\n"
+
+# path for the text file containing the goal
+#, sh-format
+msgid   "$MISSION_DIR/goal/en.txt"
+msgstr  ""
+
+# path for the text file containing the skip message
+msgid   "$MISSION_DIR/skip/en.txt"
+msgstr  ""
+
+# path for the text file containing the treasure message
+msgid   "$MISSION_DIR/treasure-msg/en.txt"
+msgstr  ""
+
+msgid   "Charmiglio"
+msgstr  ""
+
+#, sh-format
+msgid   "It works! The special incantation is $CODE"
+msgstr  ""
+
+msgid   "NOTE: you should interrupt the magical reaction after a few seconds!"
+msgstr  ""
+
+msgid   "That's not working, try a different combination..."
+msgstr  ""
+
+msgid   "The incantation can only use ASCII letters."
+msgstr  ""
+
+msgid   "The incantation requires exactly 4 letters."
+msgstr  ""
+
+#, sh-format
+msgid   "Too soon! You must leave enough time for the magical reaction to start!"
+msgstr  ""
+
+msgid   "What's a valid 4 letters sequence?"
+msgstr  ""
+
+#, sh-format
+msgid   "usage: $command CCCC\n"
+        "      where CCCC is a sequence of 4 ASCII letters (a-zA-Z)"
+msgstr  ""
diff --git a/missions/intermediate/06_control-C/init.sh b/missions/intermediate/06_control-C/init.sh
new file mode 100644
index 00000000..d081f8dd
--- /dev/null
+++ b/missions/intermediate/06_control-C/init.sh
@@ -0,0 +1,10 @@
+#!/usr/bin/env sh
+
+_mission_init() {
+  # nb of tries to make
+  echo $((2 + $(RANDOM) % 3)) > "$GSH_TMP/control-C"
+  rm -f "$GSH_TMP/control-C.codes"
+
+  copy_bin "$MISSION_DIR/Charmiglio.sh" "$GSH_BIN/$(gettext Charmiglio)"
+}
+_mission_init
diff --git a/missions/intermediate/05_control-C/test.sh b/missions/intermediate/06_control-C/test.sh
similarity index 74%
rename from missions/intermediate/05_control-C/test.sh
rename to missions/intermediate/06_control-C/test.sh
index f47c342e..7f6d11c1 100644
--- a/missions/intermediate/05_control-C/test.sh
+++ b/missions/intermediate/06_control-C/test.sh
@@ -6,9 +6,9 @@ do_test() {
   nb=$1
   delay=$2
 
-  for _ in $(seq "$nb")
+  for c in $(echo "a b c d e f g h i j" | cut -d' ' -f1-$nb)
   do
-    eval "$(gettext charmiglio)" 2>/dev/null &
+    eval "$(gettext Charmiglio)" "$c$c$c$c" 2>/dev/null &
     PID=$!
     sleep "$delay"
     kill -s INT "-$PID" 2> /dev/null
@@ -27,8 +27,8 @@ do_test() {
 do_test 10 0.3
 gsh assert check false < "$GSH_TMP/control-C"
 
-do_test 3 3
+do_test 2 4
 gsh assert check false < "$GSH_TMP/control-C"
 
-do_test 6 3
+do_test 6 4
 gsh assert check true < "$GSH_TMP/control-C"
diff --git a/missions/intermediate/index.txt b/missions/intermediate/index.txt
index 9bca21db..4a518eb4 100644
--- a/missions/intermediate/index.txt
+++ b/missions/intermediate/index.txt
@@ -2,4 +2,5 @@
 02_alias_journal
 03_tab_spider_lair
 04_bg_xeyes
-05_control-C
+05_background
+06_control-C