1.\" $NetBSD: utime.3,v 1.22 2014/10/19 16:47:51 njoly 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.\" @(#)utime.3 8.1 (Berkeley) 6/4/93 31.\" 32.Dd April 29, 2010 33.Dt UTIME 3 34.Os 35.Sh NAME 36.Nm utime 37.Nd set file times 38.Sh LIBRARY 39.Lb libc 40.Sh SYNOPSIS 41.In utime.h 42.Ft int 43.Fn utime "const char *file" "const struct utimbuf *timep" 44.Sh DESCRIPTION 45.Bf -symbolic 46This interface is obsoleted by 47.Xr utimes 2 . 48.Ef 49.Pp 50The 51.Fn utime 52function sets the access and modification times of the named file. 53.Pp 54If 55.Fa timep 56is 57.Dv NULL , 58the access and modification times are set to the current time. 59The calling process must be the owner of the file or have permission to 60write the file. 61.Pp 62If 63.Fa timep 64is 65.Pf non- Dv NULL , 66.Fa time 67is assumed to be a pointer to a utimbuf structure, as defined in 68.In utime.h : 69.Bd -literal -offset indent 70struct utimbuf { 71 time_t actime; /* Access time */ 72 time_t modtime; /* Modification time */ 73}; 74.Ed 75.Pp 76The access time is set to the value of the actime member, and the 77modification time is set to the value of the modtime member. 78The times are measured in seconds since 0 hours, 0 minutes, 0 79seconds, January 1, 1970 Coordinated Universal Time (UTC). 80The calling process must be the owner of the file or be the super-user. 81.Pp 82In either case, the inode-change-time of the file is set to the current 83time. 84.Sh RETURN VALUES 85Upon successful completion, a value of 0 is returned. 86Otherwise, a value of \-1 is returned and 87.Va errno 88is set to indicate the error. 89.Sh ERRORS 90.Fn utime 91will fail if: 92.Bl -tag -width Er 93.It Bq Er EACCES 94Search permission is denied for a component of the path prefix; 95or the 96.Fa times 97argument is 98.Dv NULL 99and the effective user ID of the process does not 100match the owner of the file, and is not the super-user, and write 101access is denied. 102.It Bq Er EFAULT 103.Fa file 104or 105.Fa times 106points outside the process's allocated address space. 107.It Bq Er EINVAL 108The pathname contains a character with the high-order bit set. 109.It Bq Er EIO 110An I/O error occurred while reading or writing the affected inode. 111.It Bq Er ELOOP 112Too many symbolic links were encountered in translating the pathname. 113.It Bq Er ENAMETOOLONG 114A component of a pathname exceeded 115.Brq Dv NAME_MAX 116characters, 117or an entire path name exceeded 118.Brq Dv PATH_MAX 119characters. 120.It Bq Er ENOENT 121The named file does not exist. 122.It Bq Er ENOTDIR 123A component of the path prefix is not a directory. 124.It Bq Er EPERM 125The 126.Fa times 127argument is not 128.Dv NULL 129and the calling process's effective user ID 130does not match the owner of the file and is not the super-user. 131.It Bq Er EROFS 132The file system containing the file is mounted read-only. 133.El 134.Sh SEE ALSO 135.Xr stat 2 , 136.Xr utimes 2 137.Sh STANDARDS 138The 139.Fn utime 140function conforms to 141.St -p1003.1-90 . 142It was however marked as legacy in the 143.St -p1003.1-2008 144revision of the standard. 145.Sh HISTORY 146A 147.Fn utime 148function appeared in 149.At v7 . 150