🚀 go-pugleaf

Machine:  Intel 386 running a fairly gnu-ized SCO Unix.
Sed version:  sed-1.12

When sed is given a command of the form

	sed -n 's/foo/bar/p'

shouldn't sed print _only_ the lines that have been substituted?

Before the "bug", sed prints nothing.  A

	sed 's/foo/bar/p'

prints duplicates of the substituted lines.  My stock sed does what
I expect, but maybe I'm wrong.  I fixed the "bug" by doing:

- A PATCH -- A PATCH -- A PATCH -- A PATCH -- A PATCH -- A PATCH -
--- sed.c.orig	Fri Dec 18 16:28:00 1992
+++ sed.c	Fri Dec 18 16:27:47 1992
@@ -1567,7 +1567,7 @@
 	    ck_fwrite (line.text, 1, line.length,
 		       cur_cmd->x.cmd_regex.wio_file);
 	  if (cur_cmd->x.cmd_regex.flags & S_PRINT_BIT
-	      && !no_default_output)
+	      || !no_default_output)
 	    ck_fwrite (line.text, 1, line.length, stdout);
 	  break;
- A PATCH -- A PATCH -- A PATCH -- A PATCH -- A PATCH -- A PATCH -

If the file /tmp/foo contains the following two lines:

GFLAG:="-g"
AND:=""

and I issue the command

    cat /tmp/foo | sed -n -e 's/^\([A-Z][A-Z]*:=\)"\(..*\)"$/\1 \2/p'

I get nothing.  If I use SCO's sed, I get

GFLAG:= -g

If I do

    cat /tmp/foo | sed -e 's/^\([A-Z][A-Z]*:=\)"\(..*\)"$/\1 \2/p'

I get

GFLAG:= -g
GFLAG:= -g
AND:=""

Hope this is enough information.

Thanks for the good tools.

mike@sojurn.lns.pa.us