fchflags man page on MirBSD

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CHFLAGS(2)		   BSD Programmer's Manual		    CHFLAGS(2)

NAME
     chflags, lchflags, fchflags - set flags of a file or link

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

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

     int
     lchflags(const char *path, unsigned int flags);

     int
     fchflags(int fd, unsigned int flags);

DESCRIPTION
     The file whose name is given by path or referenced by the descriptor fd
     has its flags changed to flags. lchflags() operates similarly to
     chflags() but does not follow symbolic links. It allows the filesystem
     flags of a symbolic link to be set.

     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 superuser.

     The SF_IMMUTABLE and SF_APPEND flags may only be set or unset by the su-
     peruser. 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() or lchflags() will fail if:

     [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 superuser, or the ef-
		   fective user ID is not the superuser and at least one 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 sup-
		   port 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.

     [EINVAL]	   The flags value is invalid.

     [EINVAL]	   The descriptor references a block or character device and
		   the effective user ID is not the superuser.

     fchflags() will fail if:

     [EBADF]	   The descriptor is not valid.

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

     [EINVAL]	   The descriptor references a block or character device and
		   the effective user ID is not the superuser.

     [EINVAL]	   The flags value is invalid.

     [EPERM]	   The effective user ID does not match the owner of the file
		   and the effective user ID is not the superuser, or the ef-
		   fective user ID is not the superuser and at least one 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 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), init(8)

HISTORY
     The chflags() and fchflags() functions first appeared in 4.4BSD. The
     lchflags() function call appeared in MirOS #10.

MirOS BSD #10-current		 May 19, 2007				     1
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