module FileTest

FileTest implements file test operations similar to those used in File::Stat.

instance methods

blockdev?

FileTest.blockdev?( aString ) → true or false

Returns true if the named file is a block device, false if it isn't or if the operating system doesn't support this feature.

FileTest.blockdev?( "testfile" ) → false

chardev?

FileTest.chardev?( aString ) → true or false

Returns true if the named file is a character device, false if it isn't or if the operating system doesn't support this feature.

FileTest.chardev?( "/dev/tty" ) → true

directory?

FileTest.directory?( aString ) → true or false

Returns true if this named file is a directory, false otherwise.

FileTest.directory?( "." ) → true

executable?

FileTest.executable?( aString ) → true or false

Returns true if the named file is executable. The tests are made using the effective owner of the process.

FileTest.executable?( "testfile" ) → false

executable_real?

FileTest.executable_real?( aString ) → true or false

Same as FileTest#executable?, but tests using the real owner of the process.

exist?

FileTest.exist? ( aString ) → true or false

Returns true if the named file exists.

FileTest.exist?( "testfile" ) → true

exists?

FileTest.exists? ( aString ) → true or false

Synonym for FileTest::exist?.

file?

FileTest.file?( aString ) → true or false

Returns true if the named file is a regular file (not a device file, pipe, socket, etc.).

FileTest.file?( "testfile" ) → true

grpowned?

FileTest.grpowned?( aString ) → true or false

Returns true if the effective group id of the process is the same as the group id of the named file. On Windows NT, returns false.

FileTest.grpowned?( "/etc/passwd" ) → false

owned?

FileTest.owned?( aString ) → true or false

Returns true if the effective user id of the process is the same as the owner of the named file.

FileTest.owned?( "/etc/passwd" ) → false

pipe?

FileTest.pipe?( aString ) → true or false

Returns true if the operating system supports pipes and the named file is a pipe, false otherwise.

FileTest.pipe?( "testfile" ) → false

readable?

FileTest.readable?( aString ) → true or false

Returns true if the named file is readable by the effective user id of this process.

FileTest.readable?( "testfile" ) → true

readable_real?

FileTest.readable_real?( aString ) → true or false

Returns true if the named file is readable by the real user id of this process.

FileTest.readable_real?( "testfile" ) → true

setgid?

FileTest.setgid?( aString ) → true or false

Returns true if the named file's set-group-id permission bit is set, and false if it isn't or if the operating system doesn't support this feature.

FileTest.setgid?( "/usr/sbin/lpc" ) → true

setuid?

FileTest.setuid?( aString ) → true or false

Returns true if the named file's set-user-id permission bit is set, and false if it isn't or if the operating system doesn't support this feature.

FileTest.setuid?( "/bin/su" ) → true

size

FileTest.size( aString ) → anInteger

Returns the size of the named file in bytes.

FileTest.size( "testfile" ) → 66

size?

FileTest.size?( aString ) → aFixnum or nil

Returns nil if the named file is of zero length; otherwise, returns a nonzero aFixnum.

FileTest.size?( "testfile" ) → 66 FileTest.size?( "/dev/zero" ) → nil

socket?

FileTest.socket?( aString ) → true or false

Returns true if the named file is a socket, false if it isn't or if the operating system doesn't support this feature.

sticky?

FileTest.sticky?( aString ) → true or false

Returns true if the named file has its sticky bit set, false if it doesn't or if the operating system doesn't support this feature.

symlink?

FileTest.symlink?( aString ) → true or false

Returns true if the named file is a symbolic link, false if it isn't or if the operating system doesn't support this feature.

writable?

FileTest.writable?( aString ) → true or false

Returns true if the named file is writable by the effective user id of this process.

writable_real?

FileTest.writable_real?( aString ) → true or false

Returns true if the named file is writable by the real user id of this process.

zero?

FileTest.zero?( aString ) → true or false

Returns true if the named file is of zero length, false otherwise.