diff --git a/awk/src/base.awk b/awk/src/base.awk
index ae59617..65c79fe 100644
--- a/awk/src/base.awk
+++ b/awk/src/base.awk
@@ -2,3 +2,4 @@
 @include "base.core.awk"
 @include "base.array.awk"
 @include "base.date.awk"
+@include "base.tools.awk"
diff --git a/awk/src/base.tools.awk b/awk/src/base.tools.awk
new file mode 100644
index 0000000..64f6d89
--- /dev/null
+++ b/awk/src/base.tools.awk
@@ -0,0 +1,20 @@
+BEGIN {
+    srand()
+}
+
+function get_random_password(          password, max, LETTERS) {
+    LETTERS = "AZERTYUIOPQSDFGHJKLMWXCVBNazertyuiopqsdfghjklmwxcvbn0123456789"
+    max = length(LETTERS)
+    password = ""
+    for (i = 0; i < 16; i++) {
+      password = password substr(LETTERS, int(rand() * max), 1)
+    }
+    return password
+}
+
+function should_generate_password() {
+    return $0 ~ /XXXRANDOMXXX/
+}
+function generate_password() {
+    sub(/XXXRANDOMXXX/, get_random_password())
+}
diff --git a/bash/src/base.tools.sh b/bash/src/base.tools.sh
index 5b1ddd3..1a7f800 100644
--- a/bash/src/base.tools.sh
+++ b/bash/src/base.tools.sh
@@ -88,3 +88,14 @@ function testsame() { diff -q "$@" >&/dev/null; }
 
 function: testdiff "tester si deux fichiers sont différents en mode silencieux"
 function testdiff() { ! diff -q "$@" >&/dev/null; }
+
+function: should_update "faut-il mettre à jour le \$1 qui est construit à partir de \$2..@"
+function should_update() {
+    local dest="$1"; shift
+    local source
+    for source in "$@"; do
+        [ -f "$source" ] || continue
+        [ "$source" -nt "$dest" ] && return 0
+    done
+    return 1
+}