lchflags man page on NetBSD

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

NAME
     chflags, lchflags, fchflags — set file flags

LIBRARY
     Standard C Library (libc, -lc)

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

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

     int
     lchflags(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.  For lchflags(), symbolic links are not
     traversed and thus their modes may be changed with this call.

     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.
	   UF_OPAQUE	 The file (if a directory) is opaque for union mounts.
	   SF_ARCHIVED	 The file is archived.
	   SF_IMMUTABLE	 The file may not be changed.
	   SF_APPEND	 The file may only be appended to.

     The UF_NODUMP, UF_IMMUTABLE, UF_APPEND, and UF_OPAQUE flags may be set or
     unset by either the owner of a file or the super-user, except on block
     and character devices, where only the super-user may set or unset them.

     The SF_ARCHIVED, SF_IMMUTABLE, and SF_APPEND flags may only be set or
     unset by the super-user.  Attempts by the non-super-user to set the
     super-user only flags are silently ignored.  These flags 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 if:

     [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,
			or the effective user ID is not the super-user and one
			or more of the super-user-only flags for the named
			file would be changed.

     [EOPNOTSUPP]	The named file resides on a file system that does not
			support file flags.

     [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,
			or the effective user ID is not the super-user and one
			or more of the super-user-only flags for the file
			would be changed.

     [EOPNOTSUPP]	The file resides on a file system that does not sup‐
			port file flags.

     [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), stat(2), stat_flags(3), init(8), mount_union(8)

HISTORY
     The chflags() and fchflags() functions first appeared in 4.4BSD.  The
     lchflags() function first appeared in NetBSD 1.5.

BSD				August 6, 2011				   BSD
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