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 futimes , 42.Nm utimes 43.Nd set file access and modification times 44.Sh LIBRARY 45.Lb libc 46.Sh SYNOPSIS 47.In sys/time.h 48.Ft int 49.Fo futimes 50.Fa "int fildes" 51.Fa "const struct timeval times[2]" 52.Fc 53.Ft int 54.Fo utimes 55.Fa "const char *path" 56.Fa "const struct timeval times[2]" 57.Fc 58.Sh DESCRIPTION 59The access and modification times of the file named by 60.Fa path 61or referenced by 62.Fa fildes 63are changed as specified by the argument 64.Fa times . 65.Pp 66If 67.Fa times 68is 69.Dv NULL , 70the access and modification times are set to the current time. 71The caller must be the owner of the file, have permission to 72write the file, or be the super-user. 73.Pp 74If 75.Fa times 76is 77.Pf non- Dv NULL , 78it is assumed to point to an array of two timeval structures. 79The access time is set to the value of the first element, and the 80modification time is set to the value of the second element. 81The caller must be the owner of the file or be the super-user. 82.Pp 83In either case, the inode-change-time of the file is set to the current 84time. 85.Sh NOTE 86In case of a symbolic link 87.Fn utimes 88function will set file access and modification times to the file the link 89references. The 90.Xr lutimes 3 91function will set the access and modification times to the symbolic link 92file. 93.Sh RETURN VALUES 94.Rv -std 95.Sh ERRORS 96The 97.Fn utimes 98system call will fail if: 99.Bl -tag -width Er 100.\" =========== 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.\" =========== 111.It Bq Er EFAULT 112.Fa path 113or 114.Fa times 115points outside the process's allocated address space. 116.\" =========== 117.It Bq Er EIO 118An I/O error occurs while reading or writing the affected inode. 119.\" =========== 120.It Bq Er ELOOP 121Too many symbolic links are encountered in translating the pathname. 122This is taken to be indicative of a looping symbolic link. 123.\" =========== 124.It Bq Er ENAMETOOLONG 125A component of a pathname exceeds 126.Dv NAME_MAX 127characters, or an entire path name exceeded 128.Dv PATH_MAX 129characters. 130.\" =========== 131.It Bq Er ENOENT 132The named file does not exist. 133.\" =========== 134.It Bq Er ENOTDIR 135A component of the path prefix is not a directory. 136.\" =========== 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 super-user. 144.\" =========== 145.It Bq Er EROFS 146The file system containing the file is mounted read-only. 147.El 148.Pp 149The 150.Fn futimes 151system call will fail if: 152.Bl -tag -width Er 153.\" =========== 154.It Bq Er EBADF 155.Fa fildes 156does not refer to a valid descriptor. 157.El 158.Pp 159All of the functions will fail if: 160.Bl -tag -width Er 161.\" =========== 162.It Bq Er EACCES 163The 164.Fa times 165argument is 166.Dv NULL 167and the effective user ID of the process does not 168match the owner of the file, and is not the super-user, and write 169access is denied. 170.\" =========== 171.It Bq Er EFAULT 172.Fa times 173points outside the process's allocated address space. 174.\" =========== 175.It Bq Er EIO 176An I/O error occurred while reading or writing the affected inode. 177.\" =========== 178.It Bq Er EPERM 179The 180.Fa times 181argument is not 182.Dv NULL 183and the calling process's effective user ID 184does not match the owner of the file and is not the super-user. 185.\" =========== 186.It Bq Er EROFS 187The file system containing the file is mounted read-only. 188.El 189.Sh SEE ALSO 190.Xr stat 2 , 191.Xr utime 3 , 192.Xr lutimes 3 193.Sh HISTORY 194The 195.Fn utimes 196function call appeared in 197.Bx 4.2 . 198The 199.Fn futimes 200function call first appeared in 201.Fx 3.0 . 202