Date: Fri, 16 Apr 2010 07:30:05 GMT From: Garrett Cooper <yanegomi@gmail.com> To: freebsd-bugs@FreeBSD.org Subject: Re: bin/145748: hexdump(1) %s format qualifier broken Message-ID: <201004160730.o3G7U50G035474@freefall.freebsd.org>
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The following reply was made to PR bin/145748; it has been noted by GNATS.
From: Garrett Cooper <yanegomi@gmail.com>
To: bug-followup@FreeBSD.org, gcooper@FreeBSD.org
Cc:
Subject: Re: bin/145748: hexdump(1) %s format qualifier broken
Date: Fri, 16 Apr 2010 00:25:16 -0700
This works however:
echo "$(jot -b a 1024)" | hexdump -e '/1 "%4s\n"'
The FSM is skipping over the format qualifier for %s in size()
according to some basic poking via gdb, because of trailing characters
after the qualifier:
(gdb) set args -e '"%4s\n"' foo
(gdb) r
Starting program: /usr/src/usr.bin/hexdump/hexdump -e '"%4s\n"' foo
Breakpoint 2, size (fs=0x800c07040) at parse.c:174
174 while (index(spec + 1, *++fmt));
(gdb) n
Breakpoint 2, size (fs=0x800c07040) at parse.c:174
174 while (index(spec + 1, *++fmt));
(gdb) n
175 if (*fmt == '.' && isdigit(*++fmt)) {
(gdb) p fmt
$1 = (unsigned char *) 0x800c09062 "s\n"
So the format strings with the qualifier itself aren't being properly
divvied up, which is a more difficult state to deal with than I
originally anticipated I'd be dealing with >:(... This comes back to
the code mess in add() I have to deal with in several other PRs.
Thanks,
-Garrett
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