.\" $OpenBSD: utime.3,v 1.23 2022/09/11 06:38:10 jmc Exp $ .\" .\" Copyright (c) 1980, 1991, 1993 .\" The Regents of the University of California. All rights reserved. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in the .\" documentation and/or other materials provided with the distribution. .\" 3. Neither the name of the University nor the names of its contributors .\" may be used to endorse or promote products derived from this software .\" without specific prior written permission. .\" .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" .Dd $Mdocdate: September 11 2022 $ .Dt UTIME 3 .Os .Sh NAME .Nm utime .Nd set file times .Sh SYNOPSIS .In sys/types.h .In utime.h .Ft int .Fn utime "const char *file" "const struct utimbuf *timep" .Sh DESCRIPTION .Bf -symbolic This interface is obsoleted by .Xr utimes 2 . .Ef .Pp The .Fn utime function sets the access and modification times of the named file. .Pp If .Fa timep is .Dv NULL , the access and modification times are set to the current time. The calling process must be the owner of the file or have permission to write the file. .Pp If .Fa timep is non-null, it specifies a pointer to a .Vt utimbuf structure, as defined in .In utime.h : .Bd -literal -offset indent struct utimbuf { time_t actime; /* Access time */ time_t modtime; /* Modification time */ }; .Ed .Pp The access time is set to the value of the .Fa actime member, and the modification time is set to the value of the .Fa modtime member. The times are measured in seconds since 0 hours, 0 minutes, 0 seconds, January 1, 1970, Coordinated Universal Time (UTC). The calling process must be the owner of the file or be the superuser. .Pp In either case, the inode change-time of the file is set to the current time. .Sh RETURN VALUES .Rv -std .Sh ERRORS .Fn utime will fail if: .Bl -tag -width Er .It Bq Er EACCES Search permission is denied for a component of the path prefix; or the .Fa timep argument is .Dv NULL and the effective user ID of the process does not match the owner of the file, the effective user ID is not that of the superuser, and write access is denied. .It Bq Er EFAULT .Fa file or .Fa timep points outside the process's allocated address space. .It Bq Er EINVAL The pathname contains a character with the high-order bit set. .It Bq Er EIO An I/O error occurred while reading or writing the affected inode. .It Bq Er ELOOP Too many symbolic links were encountered in translating the pathname. .It Bq Er ENAMETOOLONG A component of a pathname exceeded .Dv NAME_MAX characters, or an entire pathname (including the terminating NUL) exceeded .Dv PATH_MAX bytes. .It Bq Er ENOENT The named file does not exist. .It Bq Er ENOTDIR A component of the path prefix is not a directory. .It Bq Er EPERM The .Fa timep argument is not .Dv NULL and the calling process's effective user ID does not match the owner of the file and is not the superuser. .It Bq Er EROFS The file system containing the file is mounted read-only. .El .Sh SEE ALSO .Xr stat 2 , .Xr utimes 2 .Sh STANDARDS The .Fn utime function conforms to .St -p1003.1-88 . .Sh HISTORY A .Fn utime function appeared in .At v7 .