NAME

       chown, fchown - change ownership of a file

SYNOPSIS

       #include <sys/types.h>
       #include <unistd.h>
       int chown(const char *path, uid_t owner, gid_t group);
       int fchown(int fd, uid_t owner, gid_t group);

DESCRIPTION

       The  owner  of  the  file  specified  by  path or by fd is
       changed.  Only the super-user may change the  owner  of  a
       file.   The  owner  of  a file may change the group of the
       file to any group of which that owner is  a  member.   The
       super-user may change the group arbitrarily.
       If  the owner or group is specified as -1, then that ID is
       not changed.

RETURN VALUE

       On success, zero is returned.  On error, -1  is  returned,
       and errno is set appropriately.

ERRORS

       Depending   on  the  file  system,  other  errors  can  be
       returned.  The more general errors for  chown  are  listed
       below:
       EPERM     The  effective  UID  does not match the owner of
                 the file, and is not zero; or the owner or group
                 were specified incorrectly.
       EROFS     The  named file resides on a read-only file sys-
                 tem.
       EFAULT    path  points  outside  your  accessible  address
                 space.
       ENAMETOOLONG
                 path is too long.
       ENOENT    The file does not exist.
       ENOMEM    Insufficient kernel memory was available.
       ENOTDIR   A  component  of the path prefix is not a direc-
                 tory.
       EACCES    Search permission is denied on  a  component  of
                 the path prefix.
       ELOOP     path  contains a circular reference (i.e., via a
                 symbolic link)
       The general errors for fchown are listed below:
       EBADF     The descriptor is not value.
       ENOENT    See above.
       EPERM     See above.
       EROFS     See above.

NOTES

       The prototype for fchown is only available if __USE_BSD is
       defined.

SEE ALSO

       chmod(2), flock(2)