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5.7. Invoking the Shell

The C shell command interpreter can be invoked as follows:

csh  [options]  [arguments]

csh executes commands from a terminal or a file. Options -n, -v, and -x are useful when debugging scripts.

The following list details the options:

-b
Allow the remaining command-line options to be interpreted as options to a specified command, rather than as options to csh itself.

-c
Treat the first argument as a string of commands to execute. Remaining arguments are available via the argv array.

-e
Exit if a command produces errors.

-f
Fast startup; start csh without executing .cshrc or .login.

-i
Invoke interactive shell (prompt for input).

-n
Parse commands but do not execute.

-s
Read commands from the standard input.

-t
Exit after executing one command.

-v
Display commands before executing them; expand history substitutions but don't expand other substitutions (e.g., filename, variable, and command). Same as setting verbose.

-V
Same as -v, but also display .cshrc.

-x
Display commands before executing them, but expand all substitutions. Same as setting echo. -x is often combined with -v.

-X
Same as -x, but also display .cshrc.



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