Hamilton C shell Expression Operators

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File System Tests

The operand of a file system test is interpreted as a word, not an expression, and may involve wildcarding. If wildcarding produces more than one match, the test is done on the first one.

	Prefix Operator	True if
	`-A`	Archive Bit Set
	`-C`	File or Directory is Compressed
	`-D` `-d`	Directory
	`-H`	Hidden File or Directory
	`-R`	Read-only File or Directory
	`-S`	System File or Directory
	`-e`	File or Directory Exists
	`-f`	Ordinary File
	`-o`	Ownership (Same as Existence on a FAT file system)
	`-r`	Readable (Same as ordinary file on a NT FAT file system)
	`-w`	Writable (Not Read-only and not a directory)
	`-x`	Executable (Has a `.csh`, `.exe`, `.com` or `.cmd` extension and, if it's an `.exe` or a `.com` file, appears to be a valid binary executable.)
	`-z`	Zero-length File

Example:

if (-d $a) then echo $a is a directory end

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