bsd man page for rename

RENAME(3F)																RENAME(3F)

NAME
       rename - rename a file

SYNOPSIS
       integer function rename (from, to)
       character*(*) from, to

DESCRIPTION
       From  must be the pathname of an existing file.	To will become the new pathname for the file.  If to exists, then both from and to must be
       the same type of file, and must reside on the same filesystem.  If to exists, it will be removed first.

       The returned value will be 0 if successful; a system error code otherwise.

FILES
       /usr/lib/libU77.a

SEE ALSO
       rename(2), perror(3F)

BUGS
       Pathnames can be no longer than MAXPATHLEN as defined in <sys/param.h>.

4.2 Berkeley Distribution					   May 15, 1985 							RENAME(3F)