Beyond Linux® From Scratch - Version svn-20070421

Chapter 7. Shells

Dash-0.5.3

Introduction to Dash

Dash is a POSIX compliant shell. It can be installed as /bin/sh or as the default shell for either root or a second user with a userid of 0. It depends on fewer libraries than the Bash shell and is therefore less likely to be affected by an upgrade problem or disk failure. Dash is also useful for checking that a script is completely compatible with POSIX syntax.

Package Information

Additional Downloads

User Notes: http://wiki.linuxfromscratch.org/blfs/wiki/dash

Installation of Dash

Install Dash by running the following commands: 

patch -Np1 -i ../dash-0.5.3-fixes-1.patch &&
./configure --bindir=/bin --mandir=/usr/share/man &&
LC_ALL=C make

This package does not come with a test suite.

Now, as the root user: 

make install

If you would like to make dash the default sh, recreate the /bin/sh symlink as the root user: 

ln -svf dash /bin/sh

Command Explanations

--bindir=/bin: This parameter places the dash binary into the root filesystem.

LC_ALL=C make: This ensures that the sort command executed during the build process returns the expected results.

Configuring Dash

Config Files

Dash sources /etc/profile and $HOME/.profile

Configuration Information

Update /etc/shells to include the Dash shell by issuing the following command as the root user: 

cat >> /etc/shells << "EOF"
/bin/dash
EOF

Contents

Installed Program: dash
Installed Libraries: None
Installed Directories: None

Short Description

dash

is a POSIX compliant shell.

Last updated on 2007-04-04 21:42:53 +0200