1.\" $OpenBSD: utime.3,v 1.22 2015/01/29 01:46:30 schwarze Exp $ 2.\" 3.\" Copyright (c) 1980, 1991, 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. Neither the name of the University nor the names of its contributors 15.\" may be used to endorse or promote products derived from this software 16.\" without specific prior written permission. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28.\" SUCH DAMAGE. 29.\" 30.Dd $Mdocdate: January 29 2015 $ 31.Dt UTIME 3 32.Os 33.Sh NAME 34.Nm utime 35.Nd set file times 36.Sh SYNOPSIS 37.In sys/types.h 38.In utime.h 39.Ft int 40.Fn utime "const char *file" "const struct utimbuf *timep" 41.Sh DESCRIPTION 42.Bf -symbolic 43This interface is obsoleted by 44.Xr utimes 2 . 45.Ef 46.Pp 47The 48.Fn utime 49function sets the access and modification times of the named file. 50.Pp 51If 52.Fa timep 53is 54.Dv NULL , 55the access and modification times are set to the current time. 56The calling process must be the owner of the file or have permission to 57write the file. 58.Pp 59If 60.Fa timep 61is non-null, it specifies a pointer to a 62.Li utimbuf 63structure, as defined in 64.In utime.h : 65.Bd -literal -offset indent 66struct utimbuf { 67 time_t actime; /* Access time */ 68 time_t modtime; /* Modification time */ 69}; 70.Ed 71.Pp 72The access time is set to the value of the 73.Fa actime 74member, and the modification 75time is set to the value of the 76.Fa modtime 77member. 78The times are measured in 79seconds since 0 hours, 0 minutes, 0 seconds, January 1, 1970, Coordinated 80Universal Time (UTC). 81The calling process must be the owner of the file or be the superuser. 82.Pp 83In either case, the inode change-time of the file is set to the current 84time. 85.Sh RETURN VALUES 86.Rv -std 87.Sh ERRORS 88.Fn utime 89will fail if: 90.Bl -tag -width Er 91.It Bq Er EACCES 92Search permission is denied for a component of the path prefix; 93or the 94.Fa timep 95argument is 96.Dv NULL 97and the effective user ID of the process does not 98match the owner of the file, the effective user ID is not that of the 99superuser, 100and write access is denied. 101.It Bq Er EFAULT 102.Fa file 103or 104.Fa timep 105points outside the process's allocated address space. 106.It Bq Er EINVAL 107The pathname contains a character with the high-order bit set. 108.It Bq Er EIO 109An I/O error occurred while reading or writing the affected inode. 110.It Bq Er ELOOP 111Too many symbolic links were encountered in translating the pathname. 112.It Bq Er ENAMETOOLONG 113A component of a pathname exceeded 114.Dv NAME_MAX 115characters, or an entire pathname (including the terminating NUL) 116exceeded 117.Dv PATH_MAX 118bytes. 119.It Bq Er ENOENT 120The named file does not exist. 121.It Bq Er ENOTDIR 122A component of the path prefix is not a directory. 123.It Bq Er EPERM 124The 125.Fa timep 126argument is not 127.Dv NULL 128and the calling process's effective user ID 129does not match the owner of the file and is not the superuser. 130.It Bq Er EROFS 131The file system containing the file is mounted read-only. 132.El 133.Sh SEE ALSO 134.Xr stat 2 , 135.Xr utimes 2 136.Sh STANDARDS 137The 138.Fn utime 139function conforms to 140.St -p1003.1-88 . 141.Sh HISTORY 142A 143.Fn utime 144function appeared in 145.At v7 . 146