mirror of
https://github.com/Ponce/slackbuilds
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80 lines
3.1 KiB
Text
80 lines
3.1 KiB
Text
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Notes for using SlackBuilds.org csh package:
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This csh build conflicts slightly with Slackware's tcsh package. The
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easiest way to use this is to "removepkg tcsh" before installing csh. If
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you want to do this, you can skip the next section.
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Installing csh and tcsh together
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--------------------------------
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It's possible for csh to coexist with tcsh, with a few caveats:
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The shell is installed as /usr/bin/csh to avoid conflicting with
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Slackware's own tcsh package (which makes /bin/csh a symlink to tcsh). If
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you want to make /bin/csh point to the real csh, you have two choices:
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1. remove the /bin/csh symlink before installing the csh package:
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# rm -f /bin/csh
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The /bin/csh symlink will get created when csh is installed.
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2. adjust the symlink manually after csh installation:
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# rm -f /bin/csh
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# ln -s ../usr/bin/csh /bin/csh
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This works the same way as e.g. the /usr/bin/vi symlink, which points
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to either elvis or vim.
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If you have both csh and Slackware's tcsh installed, and you remove csh,
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you'll want to reinstall tcsh to clean up afterwards.
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Removing tcsh while csh is installed should be perfectly OK.
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Installing/upgrading tcsh when csh is already installed is probably a
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bad idea. Remove csh first, install tcsh, then install csh.
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As far as I know, nothing in Slackware depends on tcsh, so if you
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mess things up, you won't break your OS. You can always put things
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back to Slackware's default state by removing both csh and tsch, then
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reinstalling tcsh.
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Using csh as a login shell
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--------------------------
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If you want to use csh as a login shell, be aware that Slackware's
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shipped /etc/csh.login (from the etc package) contains tcsh-specific
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code, which prevents the /etc/profile.d/*.csh scripts from running. This
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won't prevent you from logging in, but your environment won't be set up
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correctly, you'll see "[: No match." errors, and your prompt won't show
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your username, hostname, current directory as tsch does.
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To fix this, you can replace /etc/csh.login with the /etc/csh.login.new
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installed with the csh package. It behaves the same as the original,
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for tcsh, and has conditional code to make csh behave correctly.
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# cp /etc/csh.login /etc/csh.login.orig # back up original just in case
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# mv /etc/csh.login.new /etc/csh.login
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If you don't want to replace Slackware's csh.login, just rm
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/etc/csh.login.new and forget about it.
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Other notes
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-----------
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You should read the man page for csh. Also
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/usr/doc/csh-$VERSION/paper.(txt|pdf) is a good intro to the C shell for
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beginning users. Also, if you're an experienced tcsh user, you might
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re-read the NEW FEATURES section in tcsh's man page (it describes the
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tcsh features you won't find in csh).
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NEVER make csh the default shell for the root account! In fact, it's
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probably a bad idea to ever change root's default shell on any Linux or
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UNIX system, especially a third-party one that isn't shipped with the OS.
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The man page for csh states that "Words can be no longer than 1024
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characters", but this build of csh increases the limit to 8192 (actually,
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BUFSIZ as defined in stdio.h). This was done so Slackware's profile.d
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scripts will work correctly (particularly coreutils-dircolor.sh).
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