--- /dev/null
+SAVEIFS="$IFS"
+LISTSEP="$(printf '\b')"
+
+# Create a temporary file, with its name of the form $1_XXX$2, where XXX is
+# replaced by an unique string.
+# $1: prefix, $2: suffix
+mymktemp () {
+ tmp=$(mktemp --suffix="$2" "$1_XXXXXXXXXX" 2> /dev/null)
+ if [ -z "$tmp" ]; then
+ # mktemp failed (unsupported --suffix ?), try unsafe mode
+ tmp=$(mktemp -u "$1_XXXXXXXXXX" 2> /dev/null)
+ if [ -z "$tmp" ]; then
+ # mktemp failed again (doesn't exist ?), try very unsafe mode
+ if [ -z "${mymktemp_seq}" ]; then
+ mymktemp_seq=$(date +%d%H%M%S)
+ fi
+ tmp="$1_$$x${mymktemp_seq}"
+ mymktemp_seq=$((mymktemp_seq + 1))
+ fi
+ tmp="${tmp}$2"
+ # create temp file, and exit if it existed before
+ sh -C -c "true > \"${tmp}\"" || exit 1
+ fi
+ echo "${tmp}"
+}
+
+# Add a word to the end of a list (words separated by LISTSEP)
+# $1: list, $2...: words to add
+list_add () {
+ local list content
+ list="$1"
+ shift
+ eval content=\"\${$list}\"
+ IFS="$LISTSEP"
+ if [ -z "$content" ]; then
+ content="$*"
+ else
+ content="$content${LISTSEP}$*"
+ fi
+ IFS="$SAVEIFS"
+ eval $list=\"\${content}\"
+}
+
+# Set contents of a list (words separated by LISTSEP)
+# $1: list, $2...: words to set
+list_set () {
+ eval $1=""
+ list_add "$@"
+}
+
+# Get the content of a list: positional parameters ($1, $2, ...) are set to the
+# content of the list
+# $1: list
+# usage: eval $(list_get list)
+list_get () {
+ printf 'IFS="$LISTSEP"; eval set -- \\$%s; IFS="$SAVEIFS"' "$1"
+}
