opendarwin man page for chflags

CHFLAGS(2)						      BSD System Calls Manual							CHFLAGS(2)

NAME
     chflags, fchflags -- set file flags

SYNOPSIS
     #include <sys/stat.h>
     #include <unistd.h>

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

     int
     fchflags(int fd, u_long 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} characters, or an entire path name exceeded {PATH_MAX} characters.

     [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 translating 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.

     [EFAULT]		Path points outside the process's allocated address space.

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

     Fchflags() will fail if:

     [EBADF]		The descriptor is not valid.

     [EINVAL]		fd refers to a socket, not to a file.

     [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 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