1 files changed, 64 insertions, 10 deletions

diff --git a/lib/common.sh b/lib/common.sh
index b39bbbc..9f537c7 100644
--- a/lib/common.sh
+++ b/lib/common.sh
@@ -2,7 +2,7 @@
 export LANG=C
 
 # check if messages are to be printed using color
-unset ALL_OFF BOLD BLUE GREEN RED YELLOW
+declare ALL_OFF= BOLD= BLUE= GREEN= RED= YELLOW=
 if [[ -t 2 ]]; then
 	# prefer terminal safe colored and bold text when tput is supported
 	if tput setaf 0 &>/dev/null; then
@@ -40,12 +40,12 @@ msg2() {
 
 warning() {
 	local mesg=$1; shift
-	printf "${YELLOW}==> WARNING:${ALL_OFF}${BOLD} ${mesg}${ALL_OFF}\n" "$@" >&2
+	printf "${YELLOW}==> $(gettext "WARNING:")${ALL_OFF}${BOLD} ${mesg}${ALL_OFF}\n" "$@" >&2
 }
 
 error() {
 	local mesg=$1; shift
-	printf "${RED}==> ERROR:${ALL_OFF}${BOLD} ${mesg}${ALL_OFF}\n" "$@" >&2
+	printf "${RED}==> $(gettext "ERROR:")${ALL_OFF}${BOLD} ${mesg}${ALL_OFF}\n" "$@" >&2
 }
 
 stat_busy() {
@@ -54,16 +54,22 @@ stat_busy() {
 }
 
 stat_done() {
-	printf "${BOLD}done${ALL_OFF}\n" >&2
+	printf "${BOLD}$(gettext "done")${ALL_OFF}\n" >&2
 }
 
+_setup_workdir=false
 setup_workdir() {
-	[[ -z $WORKDIR ]] && WORKDIR=$(mktemp -d --tmpdir "${0##*/}.XXXXXXXXXX")
+	[[ -z ${WORKDIR:-} ]] && WORKDIR=$(mktemp -d --tmpdir "${0##*/}.XXXXXXXXXX")
+	_setup_workdir=true
+	trap 'trap_abort' INT QUIT TERM HUP
+	trap 'trap_exit' EXIT
 }
 
 cleanup() {
-	[[ -n $WORKDIR ]] && rm -rf "$WORKDIR"
-	[[ $1 ]] && exit $1
+	if [[ -n ${WORKDIR:-} ]] && $_setup_workdir; then
+		rm -rf "$WORKDIR"
+	fi
+	[[ -n ${1:-} ]] && exit $1
 }
 
 abort() {
@@ -86,9 +92,6 @@ die() {
 	cleanup 1
 }
 
-trap 'trap_abort' INT QUIT TERM HUP
-trap 'trap_exit' EXIT
-
 ##
 #  usage : in_array( $needle, $haystack )
 # return : 0 - found
@@ -104,6 +107,57 @@ in_array() {
 }
 
 ##
+#  usage : lock_open_write( $fd, $path.lock, $wait_message )
+##
+lock_open_write() {
+	local fd=$1
+	local path=$2
+	local msg=$3
+
+	# Only reopen the FD if it wasn't handed to us
+	if [[ "$(readlink -f /dev/fd/$fd)" != "$(readlink -f "${path}")" ]]; then
+		mkdir -p "${path%/*}"
+		eval "exec $fd>${path}"
+	fi
+
+	if ! flock -n $fd; then
+		stat_busy "$msg"
+		flock $fd
+		stat_done
+	fi
+}
+
+##
+#  usage : lock_open_read( $fd, $path.lock, $wait_message )
+##
+lock_open_read() {
+	local fd=$1
+	local path=$2
+	local msg=$3
+
+	# Only reopen the FD if it wasn't handed to us
+	if [[ "$(readlink -f /dev/fd/$fd)" != "$(readlink -f "${path}")" ]]; then
+		mkdir -p "${path%/*}"
+		eval "exec $fd>${path}"
+	fi
+
+	if ! flock -sn $fd; then
+		stat_busy "$msg"
+		flock -s $fd
+		stat_done
+	fi
+}
+
+
+##
+#  usage : lock_close( $fd )
+##
+lock_close() {
+	local fd=$1
+	eval "exec $fd>&-"
+}
+
+##
 #  usage : get_full_version( [$pkgname] )
 # return : full version spec, including epoch (if necessary), pkgver, pkgrel
 ##