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Linux 2.6 - man page for utimes (linux section 3posix)

UTIMES(P)			    POSIX Programmer's Manual				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 .

IEEE/The Open Group			       2003					UTIMES(P)


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