SYNOPSIS

       touch [-amc] [MMDDhhmm[YY]] file ...
       touch [-amc] [-r ref_file|-t time] file ...

DESCRIPTION

       The  touch  utility changes the access and modification times of files.
       It creates a file if it does not already exist.  If none of  the  argu-
       ments specify the time to set, the current time is used.

       If neither the -r nor the -t option is used to specify a time value and
       the first non-option argument begins with a digit, and it  consists  of
       exactly   eight   or   ten   digits   with   /usr/5bin/posix/touch  and
       /usr/5bin/posix2001/touch, the times of the files are set to the  given
       time.

       The meaning of fields in time specifications is as follows:

              CC   The first two digits of the year.
              YY   The second two digits of the year.
              MM   The month of the year (01-12).
              DD   The day of the month (01-31).
              hh   The hour of the day (00-23).
              mm   The minute of the hour (00-59).
              SS   The second of the minute (00-61).

       Unless YY is present, the current year is used.  If YY is given without
       CC, the century is 19 if YY is in the range of 69-99, or 20 for YY val-
       ues of 00-68.

       The following options are accepted:

       -a     Change  the access time, but not the modification time unless -m
              is also present.

       -c     If a file does not exist, it is not created.  No diagnostic mes-
              sage  is  printed;  for /usr/5bin/touch and /usr/5bin/s42/touch,
              the exit status is incremented.  The exit status is not affected
              for /usr/5bin/posix/touch and /usr/5bin/posix2001/touch.

       -m     Change  the access time, but not the modification time unless -a
              is also present.

       The following options have been introduced by POSIX.2:

       -r ref_file
              The corresponding time of the specified file is used instead  of
              the current time.

       -t time
              Instead of the current time, the time specified as

                     [[CC]YY]MMDDhhmm[.SS]