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-.\" Copyright (c) 1992 Drew Eckhardt (drew@cs.colorado.edu), March 28, 1992
-.\"
-.\" SPDX-License-Identifier: Linux-man-pages-copyleft
-.\"
-.\" Modified by Michael Haardt <michael@moria.de>
-.\" Modified 1993-07-24 by Rik Faith <faith@cs.unc.edu>
-.\" Modified 1995-06-10 by Andries Brouwer <aeb@cwi.nl>
-.\" Modified 2004-06-23 by Michael Kerrisk <mtk.manpages@gmail.com>
-.\" Modified 2004-10-10 by Andries Brouwer <aeb@cwi.nl>
-.\"
-.TH utime 2 2023-10-31 "Linux man-pages 6.7"
-.SH NAME
-utime, utimes \- change file last access and modification times
-.SH LIBRARY
-Standard C library
-.RI ( libc ", " \-lc )
-.SH SYNOPSIS
-.nf
-.B #include <utime.h>
-.P
-.BI "int utime(const char *" filename ,
-.BI " const struct utimbuf *_Nullable " times );
-.P
-.B #include <sys/time.h>
-.P
-.BI "int utimes(const char *" filename ,
-.BI " const struct timeval " times "[_Nullable 2]);"
-.fi
-.SH DESCRIPTION
-.B Note:
-modern applications may prefer to use the interfaces described in
-.BR utimensat (2).
-.P
-The
-.BR utime ()
-system call
-changes the access and modification times of the inode specified by
-.I filename
-to the
-.IR actime " and " modtime
-fields of
-.I times
-respectively.
-The status change time (ctime) will be set to the current time, even if the
-other time stamps don't actually change.
-.P
-If
-.I times
-is NULL, then the access and modification times of the file are set
-to the current time.
-.P
-Changing timestamps is permitted when: either
-the process has appropriate privileges,
-or the effective user ID equals the user ID
-of the file, or
-.I times
-is NULL and the process has write permission for the file.
-.P
-The
-.I utimbuf
-structure is:
-.P
-.in +4n
-.EX
-struct utimbuf {
- time_t actime; /* access time */
- time_t modtime; /* modification time */
-};
-.EE
-.in
-.P
-The
-.BR utime ()
-system call
-allows specification of timestamps with a resolution of 1 second.
-.P
-The
-.BR utimes ()
-system call
-is similar, but the
-.I times
-argument refers to an array rather than a structure.
-The elements of this array are
-.I timeval
-structures, which allow a precision of 1 microsecond for specifying timestamps.
-The
-.I timeval
-structure is:
-.P
-.in +4n
-.EX
-struct timeval {
- long tv_sec; /* seconds */
- long tv_usec; /* microseconds */
-};
-.EE
-.in
-.P
-.I times[0]
-specifies the new access time, and
-.I times[1]
-specifies the new modification time.
-If
-.I times
-is NULL, then analogously to
-.BR utime (),
-the access and modification times of the file are
-set to the current time.
-.SH RETURN VALUE
-On success, zero is returned.
-On error, \-1 is returned, and
-.I errno
-is set to indicate the error.
-.SH ERRORS
-.TP
-.B EACCES
-Search permission is denied for one of the directories in
-the path prefix of
-.I path
-(see also
-.BR path_resolution (7)).
-.TP
-.B EACCES
-.I times
-is NULL,
-the caller's effective user ID does not match the owner of the file,
-the caller does not have write access to the file,
-and the caller is not privileged
-(Linux: does not have either the
-.B CAP_DAC_OVERRIDE
-or the
-.B CAP_FOWNER
-capability).
-.TP
-.B ENOENT
-.I filename
-does not exist.
-.TP
-.B EPERM
-.I times
-is not NULL,
-the caller's effective UID does not match the owner of the file,
-and the caller is not privileged
-(Linux: does not have the
-.B CAP_FOWNER
-capability).
-.TP
-.B EROFS
-.I path
-resides on a read-only filesystem.
-.SH STANDARDS
-POSIX.1-2008.
-.SH HISTORY
-.TP
-.BR utime ()
-SVr4, POSIX.1-2001.
-POSIX.1-2008 marks it as obsolete.
-.TP
-.BR utimes ()
-4.3BSD, POSIX.1-2001.
-.SH NOTES
-Linux does not allow changing the timestamps on an immutable file,
-or setting the timestamps to something other than the current time
-on an append-only file.
-.\"
-.\" In libc4 and libc5,
-.\" .BR utimes ()
-.\" is just a wrapper for
-.\" .BR utime ()
-.\" and hence does not allow a subsecond resolution.
-.SH SEE ALSO
-.BR chattr (1),
-.BR touch (1),
-.BR futimesat (2),
-.BR stat (2),
-.BR utimensat (2),
-.BR futimens (3),
-.BR futimes (3),
-.BR inode (7)