File Test Operators

Operators File Test Operators

A file test operator is a unary operator that takes one argument and tests to see if something is true about it

For example

$readable = -r "myfile.txt";

Operator	Meaning
`-r`	File is readable by effective uid/gid
`-w`	File is writable by effective uid/gid
`-x`	File is executable by effective uid/gid
`-o`	File is owned by effective uid
`-R`	File is readable by real uid/gid
`-W`	File is writable by real uid/gid
`-X`	File is executable by real uid/gid
`-O`	File is owned by real uid
`-e`	File exists
`-z`	File has zero size
`-s`	File non-zero size
`-f`	File is a plain file
`-d`	File is a directory
`-l`	File is a symbolic link
`-p`	File is a named pipe (FIFO)
`-s`	File is a socket
`-b`	File is a block special file
`-c`	File is a character special file
`-t`	Filehandle is opened to a tty
`-u`	File has setuid bit set
`-g`	File has setgid bit set
`-k`	File has sticky bit set
`-T`	File is a text file
`-B`	File a binary file
`-M`	Age of file in days since last modification
`-A`	Age of file in days since last access
`-C`	Age of file in days since last change