libc.info: rename

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`rename'--rename a file

*Synopsis*
     #include <stdio.h>
     int rename(const char *OLD, const char *NEW);
     int _rename_r(void *REENT,
         const char *OLD, const char *NEW);
   *Description*
Use `rename' to establish a new name (the string at NEW) for a file now
known by the string at OLD.  After a successful `rename', the file is
no longer accessible by the string at OLD.
   If `rename' fails, the file named `*OLD' is unaffected.  The
conditions for failure depend on the host operating system.
   The alternate function `_rename_r' is a reentrant version.  The
extra argument REENT is a pointer to a reentrancy structure.
*Returns*
The result is either `0' (when successful) or `-1' (when the file could
not be renamed).
*Portability*
ANSI C requires `rename', but only specifies that the result on failure
be nonzero.  The effects of using the name of an existing file as
`*NEW' may vary from one implementation to another.
   Supporting OS subroutines required: `link', `unlink', or `rename'.