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cvs history

Released February 22nd, 2006

For alot of people, CVS is history; they’ve switched to SVN and are loving life. For those of us continuing the use this venerable tool, I present the following cobbled together bit of utility.

It’s a bash function. and a nice way to keep an eye on what’s happening on a cvs repository. I work with a team of around 7 guys, and I like to keep an eye on what’s changed and who changed it.

It works like this, summarizing what I consider to be the highlights from the cvs history command, and defaults to showing checkins for the current date:

$ cvshist
M 2006-02-22 10:34 EDT jsmith  1.3  InternalOperation.java         APRJ7A/src/com/ppc/oepica/model/internal
M 2006-02-22 10:53 EDT jsmith  1.37 FooBarCopier.java              APRJ7A/src/com/ppc/oepica/model/external
M 2006-02-22 11:26 EDT darrend 1.23 CommonJobBase.java             APRJ7A/src/com/ppc/oepica/model/common

I use the date command, which gives me some flexibility when specifying a date

$ cvshist yesterday
$ cvshist 2 days ago
$ cvshist january 10
$ cvshist 2006-01-11

Here’s the source. I’ve used this on linux and cygwin; you’ll need bash, gnu date, and cvs.

$ declare -f
cvshist ()
{
  export CVSROOT=:pserver:darrend@shlnxtest1:/home/cvs;
  TARGET_DATE=$(date -d "$*" +%Y-%m-%d);
  cvs history -a -z EDT -c -D $TARGET_DATE | sed "s/\s*==.*$//" | grep "$TARGET_DATE"
}

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Quick and dirty cryptfs

Released February 15th, 2006

Here is a quick rundown on how to create a cryptfs partition that mounts during boot with Fedora Core 4.

Configure the kernel (this may already be done for you):

Device Drivers --->
  Multiple devices driver support (RAID and LVM) --->
    [*] Multiple devices driver support (RAID and LVM)
      < >   RAID support
      <*>   Device mapper support
      <*>     Crypt target support

Cryptographic options --->
  <M>   MD5 digest algorithm
  <M>   SHA1 digest algorithm
  <M>   AES cipher algorithms
   ....

Install the userland tools:

yum install cryptsetup

Create the filesystem and format it:

cryptsetup -c blowfish -s 64 create fs_name /dev/sda2
mkfs.ext3 /dev/mapper/fs_name

Create /etc/init.d/crytptinit:

if [ -b /dev/mapper/fs_name ]; then
  /sbin/cryptsetup remove fs_name
fi
/sbin/cryptsetup -c blowfish -s 64  create fs_name /dev/sda2

Run it at the runlevels you want:

cd /etc/rc3.d
ln -s ../init.d/cryptinit S08cryptinit

Create the mount point:

mkdir /mount_point

Edit /etc/fstab:

/dev/mapper/fs_name /mount_point               ext3   defaults 0 0

Reboot. You will be asked for your passphrase when the machine boots.

Information in this post was gleaned from several places. Here is one
that matches closely.

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