1.\" Copyright (c) 1989 The Regents of the University of California. 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. All advertising materials mentioning features or use of this software 13.\" must display the following acknowledgement: 14.\" This product includes software developed by the University of 15.\" California, Berkeley and its contributors. 16.\" 4. 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 6.6 (Berkeley) 7/25/91 33.\" 34.Dd July 25, 1991 35.Dt CHFLAGS 2 36.Os 37.Sh NAME 38.Nm chflags , 39.Nm fchflags 40.Nd set file flags 41.Sh SYNOPSIS 42.Fd #include <unistd.h> 43.Ft int 44.Fn chflags "const char *path" "long flags" 45.Ft int 46.Fn fchflags "int fd" "long flags" 47.Sh DESCRIPTION 48The file whose name 49is given by 50.Fa path 51or referenced by the descriptor 52.Fa fd 53has its flags changed to 54.Fa flags . 55.Pp 56Only the owner of a file (or the super-user) may change the flags. 57The owner may only change the lower 16 bits of the flags; 58the super-user may change all 32 bits of the flags. 59.Sh RETURN VALUES 60Upon successful completion, a value of 0 is returned. 61Otherwise, -1 is returned and the global variable 62.Va errno 63is set to indicate the error. 64.Sh ERRORS 65.Fn Chflags 66fails if: 67.Bl -tag -width Er 68.It Bq Er ENOTDIR 69A component of the path prefix is not a directory. 70.It Bq Er EINVAL 71The pathname contains a character with the high-order bit set. 72.It Bq Er ENAMETOOLONG 73A component of a pathname exceeded 255 characters, 74or an entire path name exceeded 1023 characters. 75.It Bq Er ENOENT 76The named file does not exist. 77.It Bq Er EACCES 78Search permission is denied for a component of the path prefix. 79.It Bq Er ELOOP 80Too many symbolic links were encountered in translating the pathname. 81.It Bq Er EPERM 82The effective user ID does not match the owner of the file and 83the effective user ID is not the super-user. 84.It Bq Er EROFS 85The named file resides on a read-only file system. 86.It Bq Er EFAULT 87.Fa Path 88points outside the process's allocated address space. 89.It Bq Er EIO 90An 91.Tn I/O 92error occurred while reading from or writing to the file system. 93.El 94.Pp 95.Fn Fchflags 96will fail if: 97.Bl -tag -width Er 98.It Bq Er EBADF 99The descriptor is not valid. 100.It Bq Er EINVAL 101.Fa Fd 102refers to a socket, not to a file. 103.It Bq Er EPERM 104The effective user ID does not match the owner of the file and 105the effective user ID is not the super-user. 106.It Bq Er EROFS 107The file resides on a read-only file system. 108.It Bq Er EIO 109An 110.Tn I/O 111error occurred while reading from or writing to the file system. 112.El 113.Sh SEE ALSO 114.Xr chmod 2 , 115.Xr open 2 , 116.Xr chown 2 , 117.Xr stat 2 118.Sh HISTORY 119The 120.Nm chflags 121and 122.Nm fchflags 123function calls are 124.Ud . 125