The C shell (csh), once one of the two major Unix shells with the Bourne shell. Csh had more advanced interactive feature but has been surpassed by modern Bourne-style shells such as zsh and bash.

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20
votes
2answers
28k views

Difference between 2>&-, 2>/dev/null, |&, &>/dev/null and >/dev/null 2>&1

Just looking for the difference between 2>&- 2>/dev/null |& &>/dev/null >/dev/null 2>&1 and their portability with non-Bourne shells like tcsh, mksh, etc.
0
votes
1answer
429 views

CSH - How to check if input is NOT number

Please help, I can only see forums with this question for Bash, KSH, and others Need to apply it on csh. to check if the inputted $2 is not number nor the word "all" if ($#argv == 2 && ($2 ...
3
votes
0answers
94 views

parametric aliases in csh to add export command

I'm trying to find a way to translate functions to csh/tcsh aliases, since they lack functions but have parametric aliases. As a first step I'm trying to create an export command. Here's what I've ...
2
votes
1answer
277 views

How can I clear portion of what is typed into the prompt while working on Linux and using C-shell?

I am working in Linux and C-shell. Often times I would require to change some portion of what is there already in the prompt that I obtain from reverse searching through the history command by use of ...
1
vote
2answers
6k views

sed command to replace a blank line with two lines of content

How do I replace the first blank line with two lines of content? I did see a question on replacing multiple blank lines with a single blank line in vim sed but don't quite see how to adapt that. So, ...
3
votes
2answers
115 views

Compatibility scripting: Save $? for use later

I would like to write a small part of a script that saves the error status, executes some other code, and sets the error status to the original error status. In Bash it looks like this: << some ...
2
votes
2answers
255 views

Is it possible to send a HEREDOC over ssh to a remote host from inside a script running locally?

I essentially want to run a script on machine A which will SSH into machine B, execute commands on B, and return the output to machine A. So I am creating a csh script to do this, hopefully, if it's ...
2
votes
2answers
202 views

Event not found in sed call in csh script

I tried the code as given on delete text between curly brackets however I am facing this different error regarding event in sed. file contains: This is { {the multiline text} file } that wants { ...
1
vote
2answers
657 views

“~/” receives a permission denied error in Csh

Running in Csh when using Tilde Notation performing a ~/ at the command line, I receive a "Permission denied." error. This directory is owned by the user performing the command and has the ...