ZSH is a powerful shell and serves as an example of the need for clean
and generic profiling.
I don't use ZSH heavily, but I maintain it in the Chicory collection.
(see below)
About profiling, I regularly setPS1='\$ ' which for BASH renders a
prompt as "$" for normal users but as "#" for superuser. It's convenient.
ZSH shows that as "\$" and does not change it when I change UID.
This is *not* a slam on ZSH, just an observation.
In search of better profiling, /etc/zprofile should source /etc/profile
and then override as needed. (PS1 being a prime example, eh?)
Or ~.zprofile sourcing ~.profile, same logic and rationale.
There are two levels: profiling which should happen when you sign on
(once) and "resource config" which gets invoked every time a program
starts.
RC scripts for shells should look for a sacred "I have been profiled"
environment variable and source appropriate profiles if it is not set.
But RC scripts should not completely re-profile because they (the RC
scripts) get sourced every time a shell starts.
RC scripts of interest in this context would be ~.zshrc and ~.bashrc (or
/etc/zshrc and /etc/bashrc if you're the sysadmin).
Does this make sense?
I started the Chicory collection when I worked in academia because I
didn't want to be on [name your platform] and not have various tools.
BASH was one. (I didn't know about ZSH in those days.)
It has grown and gotten honed. Most open source packages build really
easily. (Not as easy on USS, but that's a whole nutha story.) The
collection includes *five* shells, currently ...
* bash-5.2.15
* zsh-5.9
* pdksh-5.2.14
* dash-0.5.12
* tcsh-6.24.10
So that's BASH, ZSH, KSH, DASH, and a C-shell variant. (Long story about
C-shell. Let's just say, you don't wanna.)
-- R; <><
On 8/18/23 05:38, David Crayford wrote:
What version of bash are you using? Rocket software's port or IBM z/OS
Open Tools?
Irrespective, bash is an enhanced ASCII application so make sure you
have the following environment variables set in your profile login
scripts by entering "env | sort" from the shell command line.
_BPXK_AUTOCVT=ON
_CEE_RUNOPTS=FILETAG(AUTOCVT,AUTOTAG) TERMTHDACT(UADUMP) ABTERMENC(ABEND)
_TAG_REDIR_ERR=txt
_TAG_REDIR_IN=txt
_TAG_REDIR_OUT=txt
Incidentally, I noticed that IBM are shipping zsh as part of z/OS 3.1
so bye, bye bash.
I've being using zsh for years and it turbo charges the shell. For
example, there are open source themes such as oh-my-zsh and
powerline10k. The powerline customizes PS1 with fancy glyphs. The
current Git branch, commits and other information is shown. It's next
level to the dull one your using :). Also, there is
zsh-autosuggestions which recalls previous commands for auto
completion. oh-my-zsh also provides a plugin for git command
completion and other super cool command completions that make using
the shell as easy as an IDE.
https://github.com/ohmyzsh/ohmyzsh/tree/master
https://github.com/romkatv/powerlevel10k
https://github.com/zsh-users/zsh-autosuggestions
To enable the cool glyphs you will need to install Nerd fonts and
configure your terminal emulator. If you're a Windows user and using
PuTTY I recommend switching to Windows Terminial (preferably with
WSL2) which has tabs, tiled windows and is just miles better. If
you're on a Mac like me it's easy to configure Termimal, iTerm2 or
whatever emulator you use. Same with Linux desktops. On z/OS "export
TERM=xterm-256color"
In the meantime, there is a port of powerline-go as part of the Z/OS
Open Tools project. If you have downloaded the installer you can
install it simply by running "zopen install powerlinegoport".
https://github.com/justjanne/powerline-go # instructions how to
configure it with bash
*Z Shell (Zsh) on z/OS*
The Z Shell (Zsh), specifically Zsh 5.8.1, has been ported and made
available on z/OS 3.1. Zsh is a UNIX command interpreter that is used
as an interactive login shell and as a shell script command processor.
It has command-line editing, built-in spelling correction,
programmable command completion, shell functions (with autoloading), a
history mechanism, and a host of other features. With the
extensibility, rich customization, and advanced features, Zsh provides
a modern and powerful shell on z/OS. It is designed to accelerate
users' daily work and have consistent behavior with other open platforms.
On 17/8/2023 11:31 pm, Tom Longfellow wrote:
I am confused and am throwing out a Hail Mary for help. Here is the
situation.
Two cloned LPARs. (same sysres and unix root file systems)
On system 1 - the /etc/profile has a PS1 of
export PS1="[\\u@\\H \\W \\@]\\$ "
On system 2 - the /etc/profile has a PS1 of
export PS1="[\\u@\\H \\W \\@]\\$ "
Why YES they do look the same... at least they do to me.
-=-=-=
The results however are very different.
On system one the displayed PS1 is
[TECH905@jismvs_test ~ 11:26 AM]$
On system two the displayed PS1 is
[\u@\H \W \@]$
-=-=-=-=
I am using the same SHELL program in my environment. (/usr/bin/bash)
Anybody have any ideas why the two different LPARs are reading the
same string but interpreting it in two different ways?
My suspect is some dark secret settings in the Unix file system.
Total Guess
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