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.\" $DragonFly: src/lib/libc/sys/utimes.2,v 1.2 2003/06/17 04:26:47 dillon Exp $ 37.\" 38.Dd June 4, 1993 39.Dt UTIMES 2 40.Os 41.Sh NAME 42.Nm utimes , 43.Nm lutimes , 44.Nm futimes 45.Nd set file access and modification times 46.Sh LIBRARY 47.Lb libc 48.Sh SYNOPSIS 49.In sys/time.h 50.Ft int 51.Fn utimes "const char *path" "const struct timeval *times" 52.Ft int 53.Fn lutimes "const char *path" "const struct timeval *times" 54.Ft int 55.Fn futimes "int fd" "const struct timeval *times" 56.Sh DESCRIPTION 57The access and modification times of the file named by 58.Fa path 59or referenced by 60.Fa fd 61are changed as specified by the argument 62.Fa times . 63.Pp 64If 65.Fa times 66is 67.Dv NULL , 68the access and modification times are set to the current time. 69The caller must be the owner of the file, have permission to 70write the file, or be the super-user. 71.Pp 72If 73.Fa times 74is 75.Pf non- Dv NULL , 76it is assumed to point to an array of two timeval structures. 77The access time is set to the value of the first element, and the 78modification time is set to the value of the second element. 79The caller must be the owner of the file or be the super-user. 80.Pp 81In either case, the inode-change-time of the file is set to the current 82time. 83.Pp 84.Fn lutimes 85is like 86.Fn utimes 87except in the case where the named file is a symbolic link, 88in which case 89.Fn lutimes 90changes the access and modification times of the link, 91while 92.Fn utimes 93changes the times of the file the link references. 94.Sh RETURN VALUES 95.Rv -std 96.Sh ERRORS 97.Fn utimes 98and 99.Fn lutimes 100will fail if: 101.Bl -tag -width Er 102.It Bq Er EACCES 103Search permission is denied for a component of the path prefix; 104or the 105.Fa times 106argument is 107.Dv NULL 108and the effective user ID of the process does not 109match the owner of the file, and is not the super-user, and write 110access is denied. 111.It Bq Er EFAULT 112.Fa path 113or 114.Fa times 115points outside the process's allocated address space. 116.It Bq Er EIO 117An I/O error occurred while reading or writing the affected inode. 118.It Bq Er ELOOP 119Too many symbolic links were encountered in translating the pathname. 120.It Bq Er ENAMETOOLONG 121A component of a pathname exceeded 122.Dv NAME_MAX 123characters, or an entire path name exceeded 124.Dv PATH_MAX 125characters. 126.It Bq Er ENOENT 127The named file does not exist. 128.It Bq Er ENOTDIR 129A component of the path prefix is not a directory. 130.It Bq Er EPERM 131The 132.Fa times 133argument is not 134.Dv NULL 135and the calling process's effective user ID 136does not match the owner of the file and is not the super-user. 137.It Bq Er EROFS 138The file system containing the file is mounted read-only. 139.El 140.Pp 141.Fn futimes 142will fail if: 143.Bl -tag -width Er 144.It Bq Er EBADF 145.Fa fd 146does not refer to a valid descriptor. 147.El 148.Pp 149All of the functions will fail if: 150.Bl -tag -width Er 151.It Bq Er EACCES 152The 153.Fa times 154argument is 155.Dv NULL 156and the effective user ID of the process does not 157match the owner of the file, and is not the super-user, and write 158access is denied. 159.It Bq Er EFAULT 160.Fa times 161points outside the process's allocated address space. 162.It Bq Er EIO 163An I/O error occurred while reading or writing the affected inode. 164.It Bq Er EPERM 165The 166.Fa times 167argument is not 168.Dv NULL 169and the calling process's effective user ID 170does not match the owner of the file and is not the super-user. 171.It Bq Er EROFS 172The file system containing the file is mounted read-only. 173.El 174.Sh SEE ALSO 175.Xr stat 2 , 176.Xr utime 3 177.Sh HISTORY 178The 179.Fn utimes 180function call appeared in 181.Bx 4.2 . 182The 183.Fn futimes 184and 185.Fn lutimes 186function calls first appeared in 187.Fx 3.0 . 188