This manual page is part of the POSIX Programmer's Manual. The Linux
implementation of this interface may differ (consult the corresponding Linux
manual page for details of Linux behavior), or the interface may not be
implemented on Linux.
utime.h — access and modification times structure
The <utime.h> header shall declare the utimbuf structure,
which shall include the following members:
time_t actime Access time.
time_t modtime Modification time.
The times shall be measured in seconds since the Epoch.
The <utime.h> header shall define the time_t
type as described in <sys/types.h>.
The following shall be declared as a function and may also be
defined as a macro. A function prototype shall be provided.
int utime(const char *, const struct utimbuf *);
The following sections are informative.
The utime() function only allows setting file timestamps to the nearest
second. Applications should use the utimensat() function instead. See
The <utime.h> header may be removed in a future version.
The System Interfaces volume of POSIX.1‐2017,
Portions of this text are reprinted and reproduced in electronic form from IEEE
Std 1003.1-2017, Standard for Information Technology -- Portable Operating
System Interface (POSIX), The Open Group Base Specifications Issue 7, 2018
Edition, Copyright (C) 2018 by the Institute of Electrical and Electronics
Engineers, Inc and The Open Group. In the event of any discrepancy between
this version and the original IEEE and The Open Group Standard, the original
IEEE and The Open Group Standard is the referee document. The original
Standard can be obtained online at http://www.opengroup.org/unix/online.html .
Any typographical or formatting errors that appear in this page
are most likely to have been introduced during the conversion of the source
files to man page format. To report such errors, see