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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 1.4 2008/06/24 07:58:00 swildner Exp $ 35.\" 36.Dd June 24, 2008 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_NOHISTORY 75Do not retain history for file. 76.It UF_OPAQUE 77The directory is opaque when viewed through a union stack. 78.It SF_ARCHIVED 79The file may be archived. 80.It SF_IMMUTABLE 81The file may not be changed. 82.It SF_APPEND 83The file may only be appended to. 84.It SF_NOUNLINK 85The file may not be renamed or deleted. 86.It SF_NOHISTORY 87Do not retain history for file. 88.El 89.Pp 90The 91.Dq UF_IMMUTABLE , 92.Dq UF_APPEND , 93.Dq UF_NOUNLINK , 94.Dq UF_NOHISTORY , 95.Dq UF_NODUMP , 96and 97.Dq UF_OPAQUE 98flags may be set or unset by either the owner of a file or the super-user. 99.Pp 100The 101.Dq SF_IMMUTABLE , 102.Dq SF_APPEND , 103.Dq SF_NOUNLINK , 104.Dq SF_NOHISTORY , 105and 106.Dq SF_ARCHIVED 107flags may only be set or unset by the super-user. 108Attempts by the non-super-user to set the super-user only flags 109are silently ignored. 110These flags may be set at any time, but normally may only be unset when 111the system is in single-user mode. 112(See 113.Xr init 8 114for details.) 115.Sh RETURN VALUES 116.Rv -std 117.Sh ERRORS 118.Fn Chflags 119will fail if: 120.Bl -tag -width Er 121.It Bq Er ENOTDIR 122A component of the path prefix is not a directory. 123.It Bq Er ENAMETOOLONG 124A component of a pathname exceeded 255 characters, 125or an entire path name exceeded 1023 characters. 126.It Bq Er ENOENT 127The named file does not exist. 128.It Bq Er EACCES 129Search permission is denied for a component of the path prefix. 130.It Bq Er ELOOP 131Too many symbolic links were encountered in translating the pathname. 132.It Bq Er EPERM 133The effective user ID does not match the owner of the file and 134the effective user ID is not the super-user. 135.It Bq Er EROFS 136The named file resides on a read-only file system. 137.It Bq Er EFAULT 138.Fa Path 139points outside the process's allocated address space. 140.It Bq Er EIO 141An 142.Tn I/O 143error occurred while reading from or writing to the file system. 144.It Bq Er EOPNOTSUPP 145The underlying file system does not support file flags. 146.El 147.Pp 148.Fn Fchflags 149will fail if: 150.Bl -tag -width Er 151.It Bq Er EBADF 152The descriptor is not valid. 153.It Bq Er EINVAL 154.Fa fd 155refers to a socket, not to a file. 156.It Bq Er EPERM 157The effective user ID does not match the owner of the file and 158the effective user ID is not the super-user. 159.It Bq Er EROFS 160The file resides on a read-only file system. 161.It Bq Er EIO 162An 163.Tn I/O 164error occurred while reading from or writing to the file system. 165.It Bq Er EOPNOTSUPP 166The underlying file system does not support file flags. 167.El 168.Sh SEE ALSO 169.Xr chflags 1 , 170.Xr fflagstostr 3 , 171.Xr strtofflags 3 , 172.Xr init 8 , 173.Xr mount_union 8 174.Sh HISTORY 175The 176.Nm chflags 177and 178.Nm fchflags 179functions first appeared in 180.Bx 4.4 . 181