join EXPR,LIST Joins the separate strings of LIST into a single string with fields separated by the value of EXPR, and returns that new string

ref EXPR ref Returns a non-empty string if EXPR is a reference, the empty string otherwise. If EXPR is not

write FILEHANDLE write EXPR write Writes a formatted record (possibly

rmdir FILENAME rmdir Deletes the directory specified by FILENAME if that directory is empty. If it succeeds

getpriority WHICH,WHO Returns the current priority for a process, a process group, or a user. (See getpriority(2).) Will raise a fatal

recv SOCKET,SCALAR,LENGTH,FLAGS Receives a message on a socket. Attempts to receive LENGTH characters of data into variable SCALAR from the

cos EXPR cos Returns the cosine of EXPR (expressed in radians). If EXPR is omitted, takes the cosine of

semget KEY,NSEMS,FLAGS Calls the System V IPC function semget(2). Returns the semaphore id, or the undefined value on error. See also

split /PATTERN/,EXPR,LIMIT split /PATTERN/,EXPR split /PATTERN/ split

readlink EXPR readlink Returns the value of a symbolic link, if symbolic links are implemented. If not,