rename—rename a file #include <stdio.h>
int rename(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.
Returns
0 (when successful) or -1 (when the file
could not be renamed).
Portability
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.