NAME
utimes - set file access and modification times (LEGACY)
SYNOPSIS
#include <sys/time.h>
int utimes(const char *path, const struct timeval times[2]);
DESCRIPTION
The utimes() function shall set the access and modification times of
the file pointed to by the path argument to the value of the times
argument. The utimes() function allows time specifications accurate to
the microsecond.
For utimes(), the times argument is an array of timeval structures. The
first array member represents the date and time of last access, and the
second member represents the date and time of last modification. The
times in the timeval structure are measured in seconds and microseconds
since the Epoch, although rounding toward the nearest second may occur.
If the times argument is a null pointer, the access and modification
times of the file shall be set to the current time. The effective user
ID of the process shall match the owner of the file, or has write
access to the file or appropriate privileges to use this call in this
manner. Upon completion, utimes() shall mark the time of the last file
status change, st_ctime, for update.
RETURN VALUE
Upon successful completion, 0 shall be returned. Otherwise, -1 shall be
returned and errno shall be set to indicate the error, and the file
times shall not be affected.
ERRORS
The utimes() function shall fail if:
EACCES Search permission is denied by a component of the path prefix;
or the times argument is a null pointer and the effective user
ID of the process does not match the owner of the file and write
access is denied.
ELOOP A loop exists in symbolic links encountered during resolution of
the path argument.
ENAMETOOLONG
The length of the path argument exceeds {PATH_MAX} or a pathname
component is longer than {NAME_MAX}.
ENOENT A component of path does not name an existing file or path is an
empty string.
ENOTDIR
A component of the path prefix is not a directory.
EPERM The times argument is not a null pointer and the calling
process’ effective user ID has write access to the file but does
not match the owner of the file and the calling process does not
have the appropriate privileges.
EROFS The file system containing the file is read-only.
The utimes() function may fail if:
ELOOP More than {SYMLOOP_MAX} symbolic links were encountered during
resolution of the path argument.
ENAMETOOLONG
Pathname resolution of a symbolic link produced an intermediate
result whose length exceeds {PATH_MAX}.
The following sections are informative.
EXAMPLES
None.
APPLICATION USAGE
For applications portability, the utime() function should be used to
set file access and modification times instead of utimes().
RATIONALE
None.
FUTURE DIRECTIONS
This function may be withdrawn in a future version.
SEE ALSO
utime() , the Base Definitions volume of IEEE Std 1003.1-2001,
<sys/time.h>
COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 6, Copyright (C) 2001-2003 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 .