We're using busybox and thank the authors.
I found a short buffer allocation at busybox/sysklod/syslod.c. It
mis-declares length of filenames, seems to forget for '\0' or two
column numbered suffix of backup files (ex. messages.10).
Here is a patch for the problem.
Thanks.
Hi!
I've created a patch to busybox' build system to allow building it in
separate tree in a manner similar to kbuild from kernel version 2.6.
That is, one runs command like
'make O=/build/some/where/for/specific/target/and/options'
and everything is built in this exact directory, provided that it exists.
I understand that applyingc such invasive changes during 'release
candidates' stage of development is at best unwise. So, i'm currently
asking for comments about this patch, starting from whether such thing
is needed at all to whether it coded properly.
'make check' should work now, and one make creates Makefile in build
directory, so one can run 'make' in build directory after that.
One possible caveat is that if we build in some directory other than
source one, the source directory should be 'distclean'ed first.
egor
The Togg's sysklogd patch to use sendto() on remote logging is formatting
strangely (using `<' and '>' surrounding the `msg' string message). This
is OK, but this is not the standard way of formatting this message.
So this patch does the following:
o Fix the formatting to the standard way.
o Uses `MAXLINE' when needed;
o Don't loop sending messages without a "sleeping time",
I'm now doing `now = 1', `now <<= 1';
o Don't die on `init_RemoteLog' when starting up (feature!)
We're now trying to connect every time we have an invalid fd;
o Removes one static uneeded variable.
o Removes two automatic uneeded variables.
The second patch contains:
1) a size optimization for adduser.c
2) removes a warning about an unused variable in syslogd.c if CONFIG_FEATURE_REMOTE_LOG is not set
3)cosmetic fixes for addgroup_full_usage and adduser_full_usage
Ciao,
Tito
Syslogd wont start if remote-logging is enabled and the connection to the
remote-log server is not possible on syslogd startup.
I found a patch somewhere which works like a charm. It uses sendto() which
seems more reliable for this issue.
Please see attached patch. Many people will be more happy with this included
I think.
Regards,
Togg
Hi,
I've spent the half night staring at the devilish my_getpwuid and my_getgrgid functions
trying to find out a way to avoid actual and future potential buffer overflow problems
without breaking existing code.
Finally I've found a not intrusive way to do this that surely doesn't break existing code
and fixes a couple of problems too.
The attached patch:
1) changes the behaviour of my_getpwuid and my_getgrgid to avoid potetntial buffer overflows
2) fixes all occurences of this function calls in tar.c , id.c , ls.c, whoami.c, logger.c, libbb.h.
3) The behaviour of tar, ls and logger is unchanged.
4) The behavior of ps with somewhat longer usernames messing up output is fixed.
5) The only bigger change was the increasing of size of the buffers in id.c to avoid
false negatives (unknown user: xxxxxx) with usernames longer than 8 chars.
The value i used ( 32 chars ) was taken from the tar header ( see gname and uname).
Maybe this buffers can be reduced a bit ( to 16 or whatever ), this is up to you.
6) The increase of size of the binary is not so dramatic:
size busybox
text data bss dec hex filename
239568 2300 36816 278684 4409c busybox
size busybox_fixed
text data bss dec hex filename
239616 2300 36816 278732 440cc busybox
7) The behaviour of whoami changed:
actually it prints out an username cut down to the size of the buffer.
This could be fixed by increasing the size of the buffer as in id.c or
avoid the use of my_getpwuid and use getpwuid directly instead.
Maybe this colud be also remain unchanged......
Please apply if you think it is ok to do so.
The diff applies on today's cvs tarball (2004-08-25).
Thanks in advance,
Ciao,
Tito
Hi folks
The following patch adds a new log message output to syslogd. This
output omits hostname and priority and is used in d-i to make the syslog
output better readable without lossing information.
Bastian
I am applying this since I have syslogd hacked up in my wife's
access point with the same format string.... Might as well make
this hack official.
-Erik
On Sat, Jun 19, 2004 at 10:57:37PM +0200, Bastian Blank wrote:
> The following patch changes klogd to use openlog/syslog themself
> instead of calling syslog_msg which always calls the triple
> openlog/syslog/closelog.
Updated patch: get rid of syslog_msg entirely. Request from Erik Andersen.
Bastian
This is a bulk spelling fix patch against busybox-1.00-pre10.
If anyone gets a corrupted copy (and cares), let me know and
I will make alternate arrangements.
Erik - please apply.
Authors - please check that I didn't corrupt any meaning.
Package importers - see if any of these changes should be
passed to the upstream authors.
I glossed over lots of sloppy capitalizations, missing apostrophes,
mixed American/British spellings, and German-style compound words.
What is "pretect redefined for test" in cmdedit.c?
Good luck on the 1.00 release!
- Larry
You will find in the attached file "syslog.patch" a patch which adds
config options to set at compile time the size of the circular buffer,
and some documentation update.
the busybox menuconfig triggered my "inacceptable number of spelling mistakes"
upper level, so I decided to make a patch ;-)
I also improved some wording to describe some things in a better way.
Many thanks for an incredible piece of software!
Andreas Mohr, random OSS developer
Hi Eric
I have written a small patch for the Busybox syslogd. With this patch
one can limit the size of the messagfile. As soon as the limit is
reached the syslogd can rotate or purge the messagefile(s) on his own.
There is no necessity to use an external rotatescript.
Even if logread does something similar, its very handy to have some
messagefile after your box crash.
I wrote this patch initial vor BB 0.6x where no cron daemon was avail.
Now I adapted it for the new Version and i hope it is still useful. At
least I still use it :-)
bye
Arnd
Add follow mode to logread, ala "tail -f /var/log/messages"
Note: output to a slow serial terminal can have side effects
on syslog because of the semaphore. In such case, define
RC_LOGREAD.
