filename:  SEDMFIX1.TXT
 purpose:  fixes a bug in the 'd' command of sedmod version 1.0
 summary:

Sedmod v1.0 has a bug in the 'd' command when the -i (ignore case) 
switch is also used. The normal sed command

     sedmod -i "/pattern/d" input.fil

does not always locate (with a case-insensitive match) and delete each 
line that matches the pattern. The following fix to the sedmod source 
code is submitted by Ken Pizzini <ken@halcyon.com> and was posted on
the seders mailing list on Tue, 22 Sep 1998 20:19:13 -0600. Ken's
message follows:


-----------------------------------------------------------------
Sedmod is noting that it should do case-normalization during
its compile phase, but the block of code which does this does
not get executed for all possible commands, 'd' being one of
those that gets missed.  The patch below corrects the bugs
that Eric noted (I haven't tested enough to be certain that
this does not introduce any new bugs).

                --Ken Pizzini


--- sedcomp.c-orig      Tue Sep 22 19:44:27 1998
+++ sedcomp.c   Tue Sep 22 20:08:48 1998
@@ -258,6 +258,8 @@
                 else if ((fp = address(cmdp->addr1 = fp)) == BAD)
                         ABORT(AGMSG);
 
+                cmdp->flags.igcase = iflag;
+
                 if (fp == cmdp->addr1)          /* if empty RE was found */
                 {
                         if (lastre)             /* if there was previous RE */
@@ -327,8 +329,6 @@
         sedcmd          *sp1, *sp2;             /* temps for label searches */
         label           *lpt, *search();        /* ditto, and the searcher */
         char            redelim;                /* current RE delimiter */
-
-        cmdp->flags.igcase = iflag;
 
         switch(cchar)
         {

-----------------------------------------------------------------

The foregoing changes were made with the Unix 'diff' utility using 
the -u switch (for "unified output format"). To correct the source 
code, use the Unix 'patch' utility -- the one written by Perl author 
Larry Wall -- to modify the source file.  You should be able to do 
this:

   patch -d \path\to\sedmod\source sedcomp.c \path\to\sedmfix1.txt

to update the file SEDCOMP.C, with a backup copy retained under the 
filename SEDCOMP.ORG. If your version of patch is not 2.0.2.0 or 
later, it will not recognize the unified output format, and the 
SEDCOMP.C file will not be altered.

Patch v2.0.2.0 version 12 is available for DOS at this location:

   ftp://ftp.simtel.net/pub/simtelnet/gnu/gnuish/patch212.zip

If you do not have the 'patch' program and do not wish to install it,
you can also make this patch by simply moving lines 330 and 331 to 
just below line 260, and optionally correcting the indentation of the 
moved line.



Remarks written by Eric Pement <epement@jpusa.chi.il.us>
on 09/29/1998 03:13pm