14 March, 2010

March Slackware-current: libblkid.so.1

 The Slackware-current updates from March 1, 2010, included updates to both the e2fsprogs package and the util-linux-ng package. An important thing to note is that libblkid was moved out of e2fsprogs and into util-linux-ng. If you search the web for libblkid.so.1, slackpkg, util-linux-ng, and e2fsprogs, you will see various forum posts about not being able to boot. This is because libblkid.so.1 is required to mount and the updates included a new kernel, which meant a lot of people updated then rebooted without having util-linux-ng installed.  Booting without the library will get you error messages about libblkid.so.1 not being found when the system tries to mount the drives.

$ man libblkid
LIBBLKID(3)                                                        LIBBLKID(3)

       libblkid - block device identification library


       cc file.c -lblkid

       The  libblkid  library  is used to identify block devices (disks) as to
       their content (e.g.  filesystem type) as well as extracting  additional
       information  such  as  filesystem  labels/volume  names, unique identi-
       fiers/serial numbers, etc. 
If you don't already have util-linux-ng installed then make sure to install it before rebooting since the update to e2fsprogs will remove libblkid.
$ sudo slackpkg update
$ sudo slackpkg install util-linux-ng
$ sudo slackpkg install-new
$ sudo slackpkg upgrade-all
If you get stuck because you ran upgrade-all, don't have util-linux-ng installed, then rebooted for the kernel update, you can boot to the Slackware install CD or DVD so you can install the old version of e2fsprogs or the new util-linux-ng. This will allow you to boot normally then fix whatever is needed, such as installing the new util-linux-ng and/or upgrading e2fsprogs.

13 March, 2010

Customizing Slackware Tcl Package for Sguil

Most distributions these days are configuring their Tcl packages with --enable-threads as a default. Slackware-current switched some months back with the following in the ChangeLog.txt.

Mon Dec  7 02:13:13 UTC 2009
d/ruby-1.9.1_p243-i486-3.txz:  Rebuilt.
  Added an explicit --enable-pthread.  This is mostly to make sure that we get
  the expected option set from future releases of Ruby -- it appears that not
  only is --enable-pthread the default in ruby-1.9.1, but trying to use
  --disable-pthread doesn't work.  Furthermore, Ruby and Tcl/Tk no longer work
  together unless both Ruby and Tcl/Tk are compiled with thread support.
  Compiling Tcl/Tk with thread support has caused some problems in the past.
  If a threaded Tcl app tries to fork(), it will hang, but by now most affected
  Tcl apps (such as eggdrop) should have patches available.
  Anyway, this should fix the issues with Ruby and Tk.  Please test it, and
  report any other problems that arise.
tcl/tcl-8.5.8-i486-1.txz:  Upgraded.
  Compiled using --enable-threads, since Ruby requires it to work with Tk.
tcl/tclx-8.4-i486-3.txz:  Rebuilt.
  Recompiled using --enable-threads.
tcl/tix-8.4.3-i486-2.txz:  Rebuilt.
  Recompiled using --enable-threads.
tcl/tk-8.5.8-i486-1.txz:  Upgraded.
  Compiled using --enable-threads, since Ruby requires it to work with Tk.
The Sguil daemon will not work with threaded Tcl, so to fix this you need to build a package for the distribution of your choice with the --disable-threads configure option. In Slackware and most other distributions, it is fairly simple to customize a package.

Download Tcl from the source directory on the Slackware mirror of your choice. It should include a slack-desc file, a tcl.SlackBuild file, and the Tcl source. Modify the tcl.SlackBuild file to replace --enable-threads with --disable-threads.
./configure \
  --prefix=/usr \
  --libdir=/usr/lib${LIBDIRSUFFIX} \
  --enable-shared \
  --disable-threads \
  --enable-man-symlinks \
  --enable-man-compression=gzip \
You may also want to modify the slack-desc to note that this is a non-threaded version. Then build the new package.
$ sh tcl.SlackBuild
Slackware package /tmp/tcl-8.5.8-i486-1.txz created.
As you see, the package will get written to /tmp by default. Now replace the threaded version with the new non-threaded version.
$ sudo upgradepkg --reinstall /tmp/tcl-8.5.8-i486-1.txz
| Upgrading tcl-8.5.8-i486-1 package using /tmp/tcl-8.5.8-i486-1.txz

Pre-installing package tcl-8.5.8-i486-1...

Removing package /var/log/packages/tcl-8.5.8-i486-1-upgraded-2010-03-13,20:03:22...

Verifying package tcl-8.5.8-i486-1.txz.
Installing package tcl-8.5.8-i486-1.txz:
# tcl (Tool Command Language)
# Tcl, developed by Dr. John Ousterhout, is a simple to use text-based
# script language with many built-in features which make it especially
# nice for writing interactive scripts.
# This is a version customized by nr that uses --disable-threads.
Executing install script for tcl-8.5.8-i486-1.txz.
Package tcl-8.5.8-i486-1.txz installed.

Package tcl-8.5.8-i486-1 upgraded with new package /tmp/tcl-8.5.8-i486-1.txz.