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and subject line Bug#211675: fixed in busybox-cvs 20030926-1
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From: "Steinar H. Gunderson" <[EMAIL PROTECTED]>
To: Debian Bug Tracking System <[EMAIL PROTECTED]>
Subject: busybox-cvs-udeb: fails to use internal libpwdgrp; breaks 'id' and others
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Date: Fri, 19 Sep 2003 14:13:22 +0200
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Package: busybox-cvs-udeb
Version: 0.60.99.cvs20030819
Severity: normal
Tags: patch upstream d-i
busybox has its own internal libpwdgrp, providing standard functions
like getgrnam() etc. without having to resort to external libc (which
uses NSS, which does not work during a d-i install since the NSS
libraries would be too big to include). However, when building busybox,
the last line reads
gcc -s -Wl,-warn-common -o busybox ./applets/applets.a (other .a files
here) ./libpwdgrp/libpwdgrp.a ./coreutils/libcoreutils/libcoreutils.a
./libbb/libbb.a
coreutils/id.c (among others) uses a function called "my_getgrnam" from
libbb.a, which in turn calls getgrnam() which it expects to find in
libpwdgrp.a. However, since GNU ld only searches .a files coming
_later_ on the command line compared to the file it searches in, it
never searches libpwdgrp.a and thus searches for it in libc.so.6 instead
(where it finds it). Thus, it breaks at runtime since NSS is not
available, and glibc can only do a small amount of /etc/{passwd,group}
reading without libnss_files.so.2.
To make things worse, libpwdgrp.a depends on some variables from libbb.a
again, so it's not possible to solve this by simple rearranging. The
only way I can see how this could be made to work (without going through
all such dependencies and resolve them, which could be quite a task), is
to use the --start-group and --end-group flags from GNU ld. With them,
the linker searches all .a files every time instead of just those coming
later. This results in a performance penalty at link time (although on
my machine, busybox linking is so fast I can't notice any delay at all
:-) ), but it solves the problem and makes busybox use libpwdgrp
correctly at all times.
The included patch adds -Wl,--start-group and -Wl,--end-group to the
Makefile, causing all the .a files to be treated as a group. One could
of course make smaller groups (for instance, a group from libpwdgrp.a up
to and including libbb.a), but I don't know if this breaks other places,
and the link is fast enough anyhow, IMO. It makes busybox depend on GNU
ld for building, but I don't know any target systems for busybox where
GNU ld is not already standard :-)
-- System Information
Debian Release: 3.0
Architecture: i386
Kernel: Linux cassarossa 2.4.20 #4 SMP Tue Mar 18 18:01:22 CET 2003 i686
Locale: LANG=en_US, LC_CTYPE=en_US.ISO8859-1
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From: Bastian Blank <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
X-Katie: lisa $Revision: 1.25 $
Subject: Bug#211675: fixed in busybox-cvs 20030926-1
Message-Id: <[EMAIL PROTECTED]>
Sender: James Troup <[EMAIL PROTECTED]>
Date: Fri, 03 Oct 2003 12:44:05 -0400
Delivered-To: [EMAIL PROTECTED]
Source: busybox-cvs
Source-Version: 20030926-1
We believe that the bug you reported is fixed in the latest version of
busybox-cvs, which is due to be installed in the Debian FTP archive:
busybox-cvs-floppy-udeb_20030926-1_i386.udeb
to pool/main/b/busybox-cvs/busybox-cvs-floppy-udeb_20030926-1_i386.udeb
busybox-cvs-static_20030926-1_i386.deb
to pool/main/b/busybox-cvs/busybox-cvs-static_20030926-1_i386.deb
busybox-cvs-udeb_20030926-1_i386.udeb
to pool/main/b/busybox-cvs/busybox-cvs-udeb_20030926-1_i386.udeb
busybox-cvs_20030926-1.diff.gz
to pool/main/b/busybox-cvs/busybox-cvs_20030926-1.diff.gz
busybox-cvs_20030926-1.dsc
to pool/main/b/busybox-cvs/busybox-cvs_20030926-1.dsc
busybox-cvs_20030926-1_i386.deb
to pool/main/b/busybox-cvs/busybox-cvs_20030926-1_i386.deb
busybox-cvs_20030926.orig.tar.gz
to pool/main/b/busybox-cvs/busybox-cvs_20030926.orig.tar.gz
A summary of the changes between this version and the previous one is
attached.
Thank you for reporting the bug, which will now be closed. If you
have further comments please address them to [EMAIL PROTECTED],
and the maintainer will reopen the bug report if appropriate.
Debian distribution maintenance software
pp.
Bastian Blank <[EMAIL PROTECTED]> (supplier of updated busybox-cvs package)
(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing [EMAIL PROTECTED])
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
Format: 1.7
Date: Fri, 26 Sep 2003 15:10:14 +0200
Source: busybox-cvs
Binary: busybox-cvs-static busybox-cvs busybox-cvs-udeb busybox-cvs-floppy-udeb
Architecture: source i386
Version: 20030926-1
Distribution: unstable
Urgency: low
Maintainer: Debian Install System Team <[EMAIL PROTECTED]>
Changed-By: Bastian Blank <[EMAIL PROTECTED]>
Description:
busybox-cvs - Tiny utilities for small and embedded systems
busybox-cvs-floppy-udeb - Tiny utilities for the debian-installer floppy images (udeb)
busybox-cvs-static - Standalone rescue shell with tons of builtin utilities
busybox-cvs-udeb - Tiny utilities for the debian-installer (udeb)
Closes: 211457 211675 212485 212764
Changes:
busybox-cvs (20030926-1) unstable; urgency=low
.
* new cvs version
* Makefile
- fix libpwdgrp link (upstream) (closes: #211675)
* Rules.mak.in
- fix optimization (closes: #212485)
* debian/config*
- update
* debian/config*udeb*
- move linux-i386 to linux (enable modutils on any linux arch)
- rename net to floppy
- enable wget status bar (closes: #211457)
* init/init.c
- workaround race conditions (closes: #212764)
Files:
60a493fd4db044e93d4c863bb6db84ef 835 - optional busybox-cvs_20030926-1.dsc
bb886187fc0edbbcac3366b1a2e402c6 1273560 - optional busybox-cvs_20030926.orig.tar.gz
375af534f0e870a765a393dac512f6eb 153756 - optional busybox-cvs_20030926-1.diff.gz
510764227807c67f234b76c385134e44 101040 utils optional busybox-cvs_20030926-1_i386.deb
6bc9d5dcd7cc9efd6ace0b1b0cc845b2 636756 shells optional
busybox-cvs-static_20030926-1_i386.deb
605069664a3b9ebaef28e4e5528fb3be 134516 debian-installer extra
busybox-cvs-udeb_20030926-1_i386.udeb
f45b0767d769e57c5126af2a7603941f 115850 debian-installer extra
busybox-cvs-floppy-udeb_20030926-1_i386.udeb
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