luks: avoid `head' usage in clevis luks common functions

Use the equivalent `sed' command.
latchset · Oct 27, 2020 · f4cdc93 · f4cdc93
1 parent fce1c16
commit f4cdc93
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/luks/clevis-luks-common-functions b/src/luks/clevis-luks-common-functions
@@ -890,7 +890,7 @@ clevis_luks_first_free_slot() {
     if cryptsetup isLuks --type luks1 "${DEV}"; then
         first_free_slot=$(cryptsetup luksDump "${DEV}" \
                           | sed -rn 's|^Key Slot ([0-7]): DISABLED$|\1|p' \
-                          | head -n 1)
+                          | sed -n 1p)
     elif cryptsetup isLuks --type luks2 "${DEV}"; then
         local used_slots slt
         used_slots="$(clevis_luks_used_slots "${DEV}")"