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Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" @(#)chflags.2 8.3 (Berkeley) 5/2/95 33.\" $FreeBSD: src/lib/libc/sys/chflags.2,v 1.11.2.7 2001/12/14 18:34:00 ru Exp $ 34.\" $DragonFly: src/lib/libc/sys/chflags.2,v 1.2 2003/06/17 04:26:47 dillon Exp $ 35.\" 36.Dd May 2, 1995 37.Dt CHFLAGS 2 38.Os 39.Sh NAME 40.Nm chflags , 41.Nm fchflags 42.Nd set file flags 43.Sh LIBRARY 44.Lb libc 45.Sh SYNOPSIS 46.In sys/stat.h 47.In unistd.h 48.Ft int 49.Fn chflags "const char *path" "u_long flags" 50.Ft int 51.Fn fchflags "int fd" "u_long flags" 52.Sh DESCRIPTION 53The file whose name 54is given by 55.Fa path 56or referenced by the descriptor 57.Fa fd 58has its flags changed to 59.Fa flags . 60.Pp 61The flags specified are formed by 62.Em or Ns 'ing 63the following values 64.Pp 65.Bl -tag -width "SF_IMMUTABLE" -compact -offset indent 66.It UF_NODUMP 67Do not dump the file. 68.It UF_IMMUTABLE 69The file may not be changed. 70.It UF_APPEND 71The file may only be appended to. 72.It UF_NOUNLINK 73The file may not be renamed or deleted. 74.It UF_OPAQUE 75The directory is opaque when viewed through a union stack. 76.It SF_ARCHIVED 77The file may be archived. 78.It SF_IMMUTABLE 79The file may not be changed. 80.It SF_APPEND 81The file may only be appended to. 82.It SF_NOUNLINK 83The file may not be renamed or deleted. 84.El 85.Pp 86The 87.Dq UF_IMMUTABLE , 88.Dq UF_APPEND , 89.Dq UF_NOUNLINK , 90.Dq UF_NODUMP , 91and 92.Dq UF_OPAQUE 93flags may be set or unset by either the owner of a file or the super-user. 94.Pp 95The 96.Dq SF_IMMUTABLE , 97.Dq SF_APPEND , 98.Dq SF_NOUNLINK , 99and 100.Dq SF_ARCHIVED 101flags may only be set or unset by the super-user. 102Attempts by the non-super-user to set the super-user only flags 103are silently ignored. 104These flags may be set at any time, but normally may only be unset when 105the system is in single-user mode. 106(See 107.Xr init 8 108for details.) 109.Sh RETURN VALUES 110.Rv -std 111.Sh ERRORS 112.Fn Chflags 113will fail if: 114.Bl -tag -width Er 115.It Bq Er ENOTDIR 116A component of the path prefix is not a directory. 117.It Bq Er ENAMETOOLONG 118A component of a pathname exceeded 255 characters, 119or an entire path name exceeded 1023 characters. 120.It Bq Er ENOENT 121The named file does not exist. 122.It Bq Er EACCES 123Search permission is denied for a component of the path prefix. 124.It Bq Er ELOOP 125Too many symbolic links were encountered in translating the pathname. 126.It Bq Er EPERM 127The effective user ID does not match the owner of the file and 128the effective user ID is not the super-user. 129.It Bq Er EROFS 130The named file resides on a read-only file system. 131.It Bq Er EFAULT 132.Fa Path 133points outside the process's allocated address space. 134.It Bq Er EIO 135An 136.Tn I/O 137error occurred while reading from or writing to the file system. 138.It Bq Er EOPNOTSUPP 139The underlying file system does not support file flags. 140.El 141.Pp 142.Fn Fchflags 143will fail if: 144.Bl -tag -width Er 145.It Bq Er EBADF 146The descriptor is not valid. 147.It Bq Er EINVAL 148.Fa fd 149refers to a socket, not to a file. 150.It Bq Er EPERM 151The effective user ID does not match the owner of the file and 152the effective user ID is not the super-user. 153.It Bq Er EROFS 154The file resides on a read-only file system. 155.It Bq Er EIO 156An 157.Tn I/O 158error occurred while reading from or writing to the file system. 159.It Bq Er EOPNOTSUPP 160The underlying file system does not support file flags. 161.El 162.Sh SEE ALSO 163.Xr chflags 1 , 164.Xr fflagstostr 3 , 165.Xr strtofflags 3 , 166.Xr init 8 , 167.Xr mount_union 8 168.Sh HISTORY 169The 170.Nm chflags 171and 172.Nm fchflags 173functions first appeared in 174.Bx 4.4 . 175