Perl学习笔记(3)

FileTest        Meaning

-r                File or directory is readable

-w               File or directory is writable

-x               File or directory is executable

-o               File or directory is owned by user

-R              File or directory is readable by real user,not effective user(differs from -r for setuid programs)

-W              File or directory is writable by real user,not effective user(differs from -w for setuid programs)

-X               File or directory is executable by real user,not effective user(differs from -x for setuid programs)

-e               File or directory exists

-z               File exists and has zero size(directories are never empty)

-s               File or directory exists and has nonzero size(the value is the size in bytes)

-f                Entry is a plain file

-d               Entry is a directory

-l                Entry is a symlink

-S               Entry is a socket

-P               Entry is a named pipe(a "fifo")

-b               Entry is a block-special file(like a mountable disk)

-c               Entry is a character-special file(like an I/O device)

-u               File or directory is setuid

-g               File or directory is setgid

-k               File or directory has the sticky bit set

-t                isatty() on the filehandle is true

-T               File is "text"

-B               File is "binary"

-M               Modification age in days

-A               Access age in days

-C               Inode-modification age in days