Changes the owner and group of a file.

    Format

      #include  <unistd.h>

      int fchown  (int fildes, uid_t owner, gid_t group);

1  –  Arguments

 fildes

    An open file descriptor.

 owner

    A user ID corresponding to the new owner of the file.

 group

    A group ID corresponding to the group of the file.

2  –  Description

    The fchown function has the same effect as chown except that the
    file whose owner and group are to be changed is specified by the
    file descriptor fildes.

3  –  Return Values

    0                  Indicates success.
    -1                 Indicates failure. The function sets errno to
                       one of the following values:

                       The fchown function will fail if:

                       o  EBADF - The fildes argument is not an open
                          file descriptor.

                       o  EPERM - The effective user ID does not
                          match the owner of the file, or the process
                          does not have appropriate privilege.

                       o  EROFS - The file referred to by fildes
                          resides on a read-only file system.

                       The fchown function may fail if:

                       o  EINVAL - The owner or group ID is not a
                          value supported by the implementation.

                       o  EIO - A physical I/O error has occurred.

                       o  EINTR - The fchown function was interrupted
                          by a signal that was intercepted.