ftest, newer - test file attributes ftest test arg

newer file1 file2

Ftest checks the specified attribute of arg according to test and yields an exit status signifying the result. For all test s apart from -t , arg is the name of the file to be tested; for -t , it is the number of a file descriptor. Available tests are:

-d True if the file exists and is a directory.

-e True if the file exists.

-f True if the file exists and is a regular file.

-r True if the file exists and is readable.

-s True if the file exists and has non-zero size.

-t True if the open file represented by the number arg represents the same file as /dev/cons .

-w True if the file exists and is writable.

-x True if the file exists and is executable.

Newer checks whether file1 exists and is no older than file2 , which must also exist; if so, it yields a true exit status. Otherwise, it yields an error status. Neither file may be a directory.

/appl/cmd/ftest.b

/appl/cmd/newer.b

sys-stat (2) These commands work only with sh (1) as none of the other Inferno shells can check the exit status of a command.

Checking for read, write and execute capabilities is speculative - the file server has the last say. Group permissions are ignored.