#include <unistd.h>

     int
     chflags(const char *path, u_int flags);

     int
     fchflags(int fd, u_int flags);

DESCRIPTION

     The file whose name is given by path or referenced by the descriptor fd
     has its flags changed to flags.

     The flags specified are formed by or'ing the following values

           UF_NODUMP     Do not dump the file.
           UF_IMMUTABLE  The file may not be changed.
           UF_APPEND     The file may only be appended to.
           SF_IMMUTABLE  The file may not be changed.
           SF_APPEND     The file may only be appended to.

     The ``UF_IMMUTABLE'' and ``UF_APPEND'' flags may be set or unset by
     either the owner of a file or the super-user.

     The ``SF_IMMUTABLE'' and ``SF_APPEND'' flags may only be set or unset by
     the super-user.  They may be set at any time, but normally may only be
     unset when the system is in single-user mode.  (See init(8) for details.)

RETURN VALUES

     Upon successful completion, a value of 0 is returned.  Otherwise, -1 is
     returned and the global variable errno is set to indicate the error.

ERRORS

     Chflags() will fail it:

     [ENOTDIR]          A component of the path prefix is not a directory.

     [ENAMETOOLONG]     A component of a pathname exceeded {NAME_MAX} charac-
                        ters, or an entire path name exceeded {PATH_MAX} char-
                        acters.

     [ENOENT]           The named file does not exist.

     [EACCES]           Search permission is denied for a component of the
                        path prefix.

     [ELOOP]            Too many symbolic links were encountered in translat-
                        ing the pathname.

     [EPERM]            The effective user ID does not match the owner of the
                        file and the effective user ID is not the super-user.

     [EROFS]            The named file resides on a read-only file system.
                        file and the effective user ID is not the super-user.

     [EROFS]            The file resides on a read-only file system.

     [EIO]              An I/O error occurred while reading from or writing to
                        the file system.

SEE ALSO

     chflags(1), init(8)

HISTORY

     The chflags() and fchflags functions first appeared in 4.4BSD.

BSD                              June 9, 1993                              BSD