[ksh] do not crash when browsing through history containing comment (#733813)

[Michal Hlavinka]

commit 51febfd9638dac12765c8359a9b3bbf301170c57
Author: Michal Hlavinka <mhlavink at redhat.com>
Date:   Wed Dec 7 16:02:42 2011 +0100

    do not crash when browsing through history containing comment (#733813)

 ksh-20110630-histfix.patch |   21 +++++++++++++++++++++
 ksh.spec                   |    8 +++++++-
 2 files changed, 28 insertions(+), 1 deletions(-)
---
diff --git a/ksh-20110630-histfix.patch b/ksh-20110630-histfix.patch
new file mode 100644
index 0000000..6d08682
--- /dev/null
+++ b/ksh-20110630-histfix.patch
@@ -0,0 +1,21 @@
+diff -up ksh-20110630/src/cmd/ksh93/edit/edit.c.histfix ksh-20110630/src/cmd/ksh93/edit/edit.c
+--- ksh-20110630/src/cmd/ksh93/edit/edit.c.histfix	2011-03-03 16:20:03.000000000 +0100
++++ ksh-20110630/src/cmd/ksh93/edit/edit.c	2011-12-07 15:55:50.576089698 +0100
+@@ -1655,7 +1655,7 @@ int ed_histgen(Edit_t *ep,const char *pa
+ 	History_t	*hp;
+ 	off_t		offset;
+ 	int 		ac=0,l,m,n,index1,index2;
+-	char		*cp, **argv, **av, **ar;
++	char		*cp, **argv=NULL, **av, **ar;
+ 	if(!(hp=ep->sh->gd->hist_ptr))
+ 		return(0);
+ 	if(*pattern=='#')
+@@ -1734,7 +1734,7 @@ int ed_histgen(Edit_t *ep,const char *pa
+ 		mplast->next = 0;
+ 	}
+ 	ep->hlist = (Histmatch_t**)argv;
+-	ep->hfirst = ep->hlist[0];
++	ep->hfirst = ep->hlist ? ep->hlist[0] : NULL;
+ 	return(ep->hmax=ac);
+ }
+ 
diff --git a/ksh.spec b/ksh.spec
index 0fdba52..1837580 100644
--- a/ksh.spec
+++ b/ksh.spec
@@ -6,7 +6,7 @@ URL:          http://www.kornshell.com/
 Group:        System Environment/Shells
 License:      CPL
 Version:      20110630
-Release:      8%{?dist}
+Release:      9%{?dist}
 Source0:      http://www.research.att.com/~gsf/download/tgz/ast-ksh.%{releasedate}.tgz
 Source1:      http://www.research.att.com/~gsf/download/tgz/INIT.%{releasedate}.tgz
 Source3:      kshrc.rhs
@@ -34,6 +34,8 @@ Patch7:       ksh-20110630-dontstop.patch
 
 Patch8:       ksh-20110630-ddotfix.patch
 
+Patch9:       ksh-20110630-histfix.patch
+
 BuildRoot:    %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 Conflicts:    pdksh
 Requires: coreutils, glibc-common, diffutils
@@ -60,6 +62,7 @@ with "sh" (the Bourne Shell).
 %patch6 -p1 -b .joblimit
 %patch7 -p1 -b .dontstop
 %patch8 -p1 -b .ddotfix
+%patch9 -p1 -b .histfix
 
 #/dev/fd test does not work because of mock
 sed -i 's|ls /dev/fd|ls /proc/self/fd|' src/cmd/ksh93/features/options
@@ -145,6 +148,9 @@ fi
     rm -rf $RPM_BUILD_ROOT
 
 %changelog
+* Wed Dec 07 2011 Michal Hlavinka <mhlavink at redhat.com> - 20110630-9
+- do not crash when browsing through history containing comment (#733813)
+
 * Wed Dec 07 2011 Michal Hlavinka <mhlavink at redhat.com> - 20110630-8
 - do not crash when two subseguent dots are used in variable or command name (#733544)