xzgrep: Fix handling of the ' char at the end of an option

For example, the following would run the "id" command:

    xzgrep "--a='" "--b=;id;'" "pattern" foo.xz

The bug was inherited from gzip's zgrep. It was reported to bug-gzip by
Leenear. It was fixed in gzip in the commit cd74dc30f8cc by Paul Eggert.

Link: https://lists.gnu.org/archive/html/bug-gzip/2026-04/msg00032.html

diff --git a/src/scripts/xzgrep.in b/src/scripts/xzgrep.in
index 511ea39c7fd6eed452372ad2fa54fd01444b0835..462055120c3d8a6c104346a08b43deee349b8d6a 100644 (file)
--- a/src/scripts/xzgrep.in
+++ b/src/scripts/xzgrep.in
@@ -147,7 +147,7 @@ while test $# -ne 0; do
   esac
 
   case $option in
-  (*\'?*)
+  (*\'*)
     option=\'$(printf '%sX\n' "$option" | LC_ALL=C sed "$escape");;
   (*)
     option="'$option'";;