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csh [2013/06/03 14:59] (current)
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 +====== #!/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>​