1.\" $NetBSD: utime.3,v 1.17 2002/10/01 16:59:48 wiz 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. 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.\" @(#)utime.3 8.1 (Berkeley) 6/4/93 35.\" 36.Dd August 13, 1993 37.Dt UTIME 3 38.Os 39.Sh NAME 40.Nm utime 41.Nd set file times 42.Sh LIBRARY 43.Lb libc 44.Sh SYNOPSIS 45.Fd #include \*[Lt]utime.h\*[Gt] 46.Ft int 47.Fn utime "const char *file" "const struct utimbuf *timep" 48.Sh DESCRIPTION 49.Bf -symbolic 50This interface is obsoleted by 51.Xr utimes 2 . 52.Ef 53.Pp 54The 55.Fn utime 56function sets the access and modification times of the named file. 57.Pp 58If 59.Fa timep 60is 61.Dv NULL , 62the access and modification times are set to the current time. 63The calling process must be the owner of the file or have permission to 64write the file. 65.Pp 66If 67.Fa timep 68is 69.Pf non- Dv NULL , 70.Fa time 71is assumed to be a pointer to a utimbuf structure, as defined in 72.Aq Pa utime.h : 73.Bd -literal -offset indent 74struct utimbuf { 75 time_t actime; /* Access time */ 76 time_t modtime; /* Modification time */ 77}; 78.Ed 79.Pp 80The access time is set to the value of the actime member, and the 81modification time is set to the value of the modtime member. 82The times are measured in seconds since 0 hours, 0 minutes, 0 83seconds, January 1, 1970 Coordinated Universal Time (UTC). 84The calling process must be the owner of the file or be the super-user. 85.Pp 86In either case, the inode-change-time of the file is set to the current 87time. 88.Sh RETURN VALUES 89Upon successful completion, a value of 0 is returned. 90Otherwise, a value of \-1 is returned and 91.Va errno 92is set to indicate the error. 93.Sh ERRORS 94.Fn utime 95will fail if: 96.Bl -tag -width Er 97.It Bq Er EACCES 98Search permission is denied for a component of the path prefix; 99or the 100.Fa times 101argument is 102.Dv NULL 103and the effective user ID of the process does not 104match the owner of the file, and is not the super-user, and write 105access is denied. 106.It Bq Er EFAULT 107.Fa file 108or 109.Fa times 110points outside the process's allocated address space. 111.It Bq Er EINVAL 112The pathname contains a character with the high-order bit set. 113.It Bq Er EIO 114An I/O error occurred while reading or writing the affected inode. 115.It Bq Er ELOOP 116Too many symbolic links were encountered in translating the pathname. 117.It Bq Er ENAMETOOLONG 118A component of a pathname exceeded 255 characters, 119or an entire path name exceeded 1023 characters. 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 . 142.Sh HISTORY 143A 144.Fn utime 145function appeared in 146.At v7 . 147