1.\" $OpenBSD: utimes.2,v 1.9 2007/05/31 19:19:34 jmc Exp $ 2.\" $NetBSD: utimes.2,v 1.9 1996/04/23 10:34:16 mycroft Exp $ 3.\" 4.\" Copyright (c) 1990, 1993 5.\" The Regents of the University of California. All rights reserved. 6.\" 7.\" Redistribution and use in source and binary forms, with or without 8.\" modification, are permitted provided that the following conditions 9.\" are met: 10.\" 1. Redistributions of source code must retain the above copyright 11.\" notice, this list of conditions and the following disclaimer. 12.\" 2. Redistributions in binary form must reproduce the above copyright 13.\" notice, this list of conditions and the following disclaimer in the 14.\" documentation and/or other materials provided with the distribution. 15.\" 3. Neither the name of the University nor the names of its contributors 16.\" may be used to endorse or promote products derived from this software 17.\" without specific prior written permission. 18.\" 19.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29.\" SUCH DAMAGE. 30.\" 31.\" @(#)utimes.2 8.1 (Berkeley) 6/4/93 32.\" 33.Dd $Mdocdate: May 31 2007 $ 34.Dt UTIMES 2 35.Os 36.Sh NAME 37.Nm utimes 38.Nd set file access and modification times 39.Sh SYNOPSIS 40.Fd #include <sys/time.h> 41.Ft int 42.Fn utimes "const char *file" "const struct timeval *times" 43.Ft int 44.Fn futimes "int fd" "const struct timeval *times" 45.Sh DESCRIPTION 46The access and modification times of the file named by 47.Fa path 48or referenced by 49.Fa fd 50are changed as specified by the argument 51.Fa times . 52.Pp 53If 54.Fa times 55is 56.Dv NULL , 57the access and modification times are set to the current time. 58The caller must be the owner of the file, have permission to 59write the file, or be the superuser. 60.Pp 61If 62.Fa times 63is non-null, 64it is assumed to point to an array of two timeval structures. 65The access time is set to the value of the first element, and the 66modification time is set to the value of the second element. 67The caller must be the owner of the file or be the superuser. 68.Pp 69In either case, the inode-change-time of the file is set to the current 70time. 71.Sh RETURN VALUES 72Upon successful completion, a value of 0 is returned. 73Otherwise, a value of \-1 is returned and 74.Va errno 75is set to indicate the error. 76.Sh ERRORS 77.Fn utimes 78will fail if: 79.Bl -tag -width Er 80.It Bq Er EACCES 81Search permission is denied for a component of the path prefix; 82or the 83.Fa times 84argument is 85.Dv NULL 86and the effective user ID of the process does not 87match the owner of the file, and is not the superuser, and write 88access is denied. 89.It Bq Er EFAULT 90.Pa File 91or 92.Fa times 93points outside the process's allocated address space. 94.It Bq Er EIO 95An I/O error occurred while reading or writing the affected inode. 96.It Bq Er ELOOP 97Too many symbolic links were encountered in translating the pathname. 98.It Bq Er ENAMETOOLONG 99A component of a pathname exceeded 100.Dv {NAME_MAX} 101characters, or an entire path name exceeded 102.Dv {PATH_MAX} 103characters. 104.It Bq Er ENOENT 105The named file does not exist. 106.It Bq Er ENOTDIR 107A component of the path prefix is not a directory. 108.It Bq Er EPERM 109The 110.Fa times 111argument is not 112.Dv NULL 113and the calling process's effective user ID 114does not match the owner of the file and is not the superuser. 115.It Bq Er EROFS 116The file system containing the file is mounted read-only. 117.El 118.Fn futimes 119will fail if: 120.Bl -tag -width Er 121.It Bq Er EBADF 122.Fa fd 123does not refer to a valid descriptor. 124.It Bq Er EACCES 125The 126.Fa times 127argument is 128.Dv NULL 129and the effective user ID of the process does not 130match the owner of the file, and is not the superuser, and write 131access is denied. 132.It Bq Er EFAULT 133.Fa times 134points outside the process's allocated address space. 135.It Bq Er EIO 136An I/O error occurred while reading or writing the affected inode. 137.It Bq Er EPERM 138The 139.Fa times 140argument is not 141.Dv NULL 142and the calling process's effective user ID 143does not match the owner of the file and is not the superuser. 144.It Bq Er EROFS 145The file system containing the file is mounted read-only. 146.El 147.Sh SEE ALSO 148.Xr stat 2 , 149.Xr utime 3 150.Sh HISTORY 151The 152.Fn utimes 153function call appeared in 154.Bx 4.2 . 155The 156.Fn futimes 157function call appeared in 158.Nx 1.2 . 159