fixed syntax error testcase: a=b which ls

which.spec

@@ -1,7 +1,7 @@
 Summary: Displays where a particular program in your path is located
 Name: which
 Version: 2.21
-Release: 21%{?dist}
+Release: 22%{?dist}
 License: GPLv3
 Source0: http://ftp.gnu.org/gnu/which/%{name}-%{version}.tar.gz
 Source1: which2.sh
@@ -40,6 +40,9 @@ rm -f $RPM_BUILD_ROOT%{_infodir}/dir
 %{_mandir}/man1/which.1*
 
 %changelog
+* Thu Mar 18 2021 Than Ngo <than@redhat.com> - 2.21-22
+- fixed syntax error testcase: a=b which ls
+
 * Wed Jan 27 2021 Fedora Release Engineering <releng@fedoraproject.org> - 2.21-21
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_34_Mass_Rebuild
 

which2.sh

@@ -1,7 +1,11 @@
-# Initialization script for bash and sh
-
-if [ "$0" = "ksh" -o "$0" = "-ksh" -o "$0" = "mksh" -o "$0" = "-mksh" ] ; then
-  alias which='(alias; typeset -f) | /usr/bin/which --tty-only --read-alias --read-functions --show-tilde --show-dot'
-else
-  alias which='(alias; declare -f) | /usr/bin/which --tty-only --read-alias --read-functions --show-tilde --show-dot'
-fi
+# Initialization script for bash, sh, mksh and ksh
+which ()
+{
+  if [ "$0" = "ksh" -o "$0" = "-ksh" -o "$0" = "mksh" -o "$0" = "-mksh" ] ; then
+    (alias; typeset -f) | /usr/bin/which --tty-only --read-alias --read-functions --show-tilde --show-dot $@
+    export which
+  else
+    (alias; declare -f) | /usr/bin/which --tty-only --read-alias --read-functions --show-tilde --show-dot $@
+    export -f which
+  fi
+}