Remove fork when tcsh processes backquotes

tcsh-6.17.00-extrafork.patch

@@ -0,0 +1,18 @@
+diff -up tcsh-6.17.00/sh.glob.c.orig tcsh-6.17.00/sh.glob.c
+--- tcsh-6.17.00/sh.glob.c.orig	2010-10-06 10:27:21.015893878 +0200
++++ tcsh-6.17.00/sh.glob.c	2010-10-06 10:28:17.503914951 +0200
+@@ -881,11 +881,13 @@ backeval(struct blk_buf *bb, struct Strb
+ 		stderror(ERR_OLD);
+ 	    alias(&paraml);
+ 	    t = syntax(paraml.next, &paraml, 0);
++	    if (t == NULL)
++		return;
+ 	    cleanup_push(t, syntax_cleanup);
+ 	    /* The F_BACKQ flag must set so the job output is correct if
+ 	     * printexitvalue is set.  If it's not set, the job output
+ 	     * will have "Exit N" appended where N is the exit status. */
+-	    t->t_dflg = F_BACKQ;
++	    t->t_dflg = F_BACKQ|F_NOFORK;
+ 	    if (seterr)
+ 		stderror(ERR_OLD);
+ #ifdef SIGTSTP

tcsh.spec

@@ -3,7 +3,7 @@
 Summary: An enhanced version of csh, the C shell
 Name: tcsh
 Version: 6.17
-Release: 8%{?dist}
+Release: 9%{?dist}
 License: BSD
 Group: System Environment/Shells
 Source: ftp://ftp.astron.com/pub/tcsh/%{name}-%{version}.00.tar.gz
@@ -26,6 +26,8 @@ Patch15: tcsh-6.17.00-history.patch
 # Accepted by upstream:
 Patch16: tcsh-6.17.00-printexitvalue.patch
 Patch17: tcsh-6.17.00-testsuite.patch
+# Accepted by upstream:
+Patch18: tcsh-6.17.00-extrafork.patch
 Provides: csh = %{version}
 Requires(post): grep
 Requires(postun): coreutils, grep
@@ -58,6 +60,7 @@ like syntax.
 %patch15 -p1 -b .history
 %patch16 -p1 -b .printexitvalue
 %patch17 -p1 -b .testsuite
+%patch18 -p1 -b .extrafork
 
 for i in Fixes WishList; do
  iconv -f iso-8859-1 -t utf-8 "$i" > "${i}_" && \
@@ -131,6 +134,9 @@ fi
 %{_mandir}/man1/*.1*
 
 %changelog
+* Wed Oct  6 2010 Vitezslav Crhonek <vcrhonek@redhat.com> - 6.17-9
+- Remove fork when tcsh processes backquotes
+
 * Wed Apr 14 2010 Vitezslav Crhonek <vcrhonek@redhat.com> - 6.17-8
 - Fix testsuite