====== #!/bin/csh ======

  * [[FreeBSD]]
  * [[bash]]
  * [[ksh]]
  * [[sh]]
  * [[tcsh]]
  * [[zsh]]

  * [[http://www.mcsr.olemiss.edu/unixhelp/shell/oview1.1.html|Summary of shell facilities]]
  * [[http://www.grymoire.com/Unix/Csh.html|csh tutorial]]
  * [[http://www.grymoire.com/Unix/CshTop10.txt|Top Ten Reasons not to use the C shell]]

Welcome to the C shell.

=== Syntax ===

Output to ''dev/null'':

<code>
portsnap extract >& /dev/null
</code>

== File Operators ==

  * **-e**  file exists
  * **-o** file exists and is owned by the user
  * **-r** file exists and is readable
  * **-w** file exists and is writable
  * **-x** file exists and is executable
  * **-z** file exists and is zero size
  * **-d** dir exists and is a directory

=== Examples ===

== Loops ==

The syntax is different here, in that there is no ''in'' keyword.

<code>
#!/bin/csh
foreach x ( one two three )
  echo number $x!
end
</code>

== If .. Then ==

<code>
#!/bin/csh
foreach filename ( foo.tar.gz bar.tar.bz2 )
  if ( ! -e $filename ) then
    echo "I can't find $filename anywhere!"
  endif
end
</code>

== Passing Arguments ==

<code>
#!/bin/csh
echo found $#argv arguments
echo first argument is: $argv[1]
echo second argument is: $argv[2]
</code>

<code>
args.csh Hello CSH
</code>