pacman-key: Actually verify signatures and exit with correct codes

We cannot rely on gpg's exit code. Instead we have to check the status-fd to
figure out whether a signature is valid or not.

In addition to this pacman-key --verify can now be used in scripts as it will
return an exit code of 1 if the signature is invalid.

Signed-off-by: Pierre Schmitz <pierre@archlinux.de>
Signed-off-by: Dan McGee <dan@archlinux.org>

1 files changed, 5 insertions, 1 deletions

diff --git a/scripts/pacman-key.sh.in b/scripts/pacman-key.sh.in
index ccc387b2..278e3d6e 100644
--- a/scripts/pacman-key.sh.in
+++ b/scripts/pacman-key.sh.in
@@ -439,10 +439,14 @@ refresh_keys() {
 }
 
 verify_sig() {
-	if ! "${GPG_PACMAN[@]}" --verify $SIGNATURE ; then
+	local fd="$(mktemp)"
+	"${GPG_PACMAN[@]}" --status-file "${fd}" --verify $SIGNATURE
+	if ! grep -q TRUST_FULLY "${fd}"; then
+		rm -f "${fd}"
 		error "$(gettext "The signature identified by %s could not be verified.")" "$SIGNATURE"
 		exit 1
 	fi
+	rm -f "${fd}"
 }
 
 updatedb() {