UTIMES(P) UTIMES(P)
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 argu-
ment 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 call-
ing 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 orig-
inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .
POSIX 2003 UTIMES(P)
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