1.\" $NetBSD: utimes.2,v 1.13 1999/03/22 19:45:11 garbled Exp $ 2.\" 3.\" Copyright (c) 1990, 1993 4.\" The Regents of the University of California. All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. All advertising materials mentioning features or use of this software 15.\" must display the following acknowledgement: 16.\" This product includes software developed by the University of 17.\" California, Berkeley and its contributors. 18.\" 4. Neither the name of the University nor the names of its contributors 19.\" may be used to endorse or promote products derived from this software 20.\" without specific prior written permission. 21.\" 22.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32.\" SUCH DAMAGE. 33.\" 34.\" @(#)utimes.2 8.1 (Berkeley) 6/4/93 35.\" $FreeBSD: src/lib/libc/sys/utimes.2,v 1.8.2.4 2001/12/14 18:34:02 ru Exp $ 36.\" 37.Dd June 4, 1993 38.Dt UTIMES 2 39.Os 40.Sh NAME 41.Nm utimes , 42.Nm lutimes , 43.Nm futimes 44.Nd set file access and modification times 45.Sh LIBRARY 46.Lb libc 47.Sh SYNOPSIS 48.In sys/time.h 49.Ft int 50.Fn utimes "const char *path" "const struct timeval *times" 51.Ft int 52.Fn lutimes "const char *path" "const struct timeval *times" 53.Ft int 54.Fn futimes "int fd" "const struct timeval *times" 55.Sh DESCRIPTION 56The access and modification times of the file named by 57.Fa path 58or referenced by 59.Fa fd 60are changed as specified by the argument 61.Fa times . 62.Pp 63If 64.Fa times 65is 66.Dv NULL , 67the access and modification times are set to the current time. 68The caller must be the owner of the file, have permission to 69write the file, or be the super-user. 70.Pp 71If 72.Fa times 73is 74.Pf non- Dv NULL , 75it is assumed to point to an array of two timeval structures. 76The access time is set to the value of the first element, and the 77modification time is set to the value of the second element. 78The caller must be the owner of the file or be the super-user. 79.Pp 80In either case, the inode-change-time of the file is set to the current 81time. 82.Pp 83.Fn lutimes 84is like 85.Fn utimes 86except in the case where the named file is a symbolic link, 87in which case 88.Fn lutimes 89changes the access and modification times of the link, 90while 91.Fn utimes 92changes the times of the file the link references. 93.Sh RETURN VALUES 94.Rv -std 95.Sh ERRORS 96.Fn utimes 97and 98.Fn lutimes 99will fail if: 100.Bl -tag -width Er 101.It Bq Er EACCES 102Search permission is denied for a component of the path prefix; 103or the 104.Fa times 105argument is 106.Dv NULL 107and the effective user ID of the process does not 108match the owner of the file, and is not the super-user, and write 109access is denied. 110.It Bq Er EFAULT 111.Fa path 112or 113.Fa times 114points outside the process's allocated address space. 115.It Bq Er EIO 116An I/O error occurred while reading or writing the affected inode. 117.It Bq Er ELOOP 118Too many symbolic links were encountered in translating the pathname. 119.It Bq Er ENAMETOOLONG 120A component of a pathname exceeded 121.Dv NAME_MAX 122characters, or an entire path name exceeded 123.Dv PATH_MAX 124characters. 125.It Bq Er ENOENT 126The named file does not exist. 127.It Bq Er ENOTDIR 128A component of the path prefix is not a directory. 129.It Bq Er EPERM 130The 131.Fa times 132argument is not 133.Dv NULL 134and the calling process's effective user ID 135does not match the owner of the file and is not the super-user. 136.It Bq Er EROFS 137The file system containing the file is mounted read-only. 138.El 139.Pp 140.Fn futimes 141will fail if: 142.Bl -tag -width Er 143.It Bq Er EBADF 144.Fa fd 145does not refer to a valid descriptor. 146.El 147.Pp 148All of the functions will fail if: 149.Bl -tag -width Er 150.It Bq Er EACCES 151The 152.Fa times 153argument is 154.Dv NULL 155and the effective user ID of the process does not 156match the owner of the file, and is not the super-user, and write 157access is denied. 158.It Bq Er EFAULT 159.Fa times 160points outside the process's allocated address space. 161.It Bq Er EIO 162An I/O error occurred while reading or writing the affected inode. 163.It Bq Er EPERM 164The 165.Fa times 166argument is not 167.Dv NULL 168and the calling process's effective user ID 169does not match the owner of the file and is not the super-user. 170.It Bq Er EROFS 171The file system containing the file is mounted read-only. 172.El 173.Sh SEE ALSO 174.Xr stat 2 , 175.Xr utime 3 176.Sh HISTORY 177The 178.Fn utimes 179function call appeared in 180.Bx 4.2 . 181The 182.Fn futimes 183and 184.Fn lutimes 185function calls first appeared in 186.Fx 3.0 . 187