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cronrgf
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cronrgf.txt
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1993-11-08
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Infos on CRONRGF.CMD
====================
CRONRGF.CMD was modelled after the "cron"-utility of Unix. It allows you to
specify in a control files on which times and dates a command should be executed
repeatedly.
CRONRGF.CMD starts and runs forever, dispatching the commands at the given
times.
Please check ATRGF.CMD which was modelled after the OS/2-LAN-command "at" for
another variant having features not found in CRONRGF.CMD.
Usage
=====
CRONRGF [/T] [/M] [/R[nn]] [/B] cronfile
Reads file 'cronfile' and executes command[s] repeatedly according to it.
'cronfile' has to be formatted like in Unix; unlike the Unix-version a '%' is
treated like any other character; empty lines and ones starting with
a semi-colon (;) or a (#) are ignored.
Switch '/T[estmode]': the cronfile is read and the user is presented with the date/times
and commands to be executed upon them. The planned and truly scheduled
times are written to the log-file.
Switch '/M[idnight]': all commands which were scheduled the same day, starting from
midnight to the time of first invocation are executed once.
Switch '/R[nn]': check cronfile at least every 'nn' (default 60) minutes whether it changed; if so, reread
it immediately and set the new schedule-times. If set, the cronfile will be checked for changes after
executing commands
Switch '/B[lackAndWhite]': do not colorize output strings (e.g. for usage in more, less etc.).
This switch merely suppresses the ANSI-color-sequences attached to the
strings.
example: CRONRGF /TEST testcron
execute statements in file 'testcron' in testmode
example for a control-file:
; Sample file for CRONRGF.CMD
;
; This is a comment (starts with a semicolumn)
# This is a comment too (starts with the Unix-comment symbol)
; empty lines are ignored too...
; LAYOUT OF THE CRON-FILE:
; * * * * * command
; or
; minute hour day month weekday command
; where minute ranges from 0-59,
; hour ranges from 0-23,
; day ranges from 1-31,
; month ranges from 1-12,
; weekday ranges from 1-7 (1 = Monday, 2 = Tuesday, ..., 7 = Sunday)
;
; you can give a list of values, separated by a comma (,), e.g. "1,3,7"
; you can give a range of values, separated by a dash (-), e.g. "1-5"
; you can give a star (*) instead of a value, meaning entire range of all valid values
;
; the given command is only executed when all criteriae are fullfilled !
;
; restriction: unlike to Unix, the percent-sign (%) is treated like any other character and
; not as a new-line
;
# the following command "@ECHO HI, I am Nr. 1 to be echoed every minute" would be
# executed every minute
* * * * * @ECHO Hi, I am Nr. 1 to be echoed every minute & pause
59 23 31 12 5 command, one minute before year's end, and only if the last day is a Friday
; comment: every year at 17:45 on June 7th:
45 17 7 6 * dir c:\*.exe
; comment: on every full quarter of an hour
; at midnight, 6 in the morning, noon, 6 in the evening
; on the 1st, 15th and 31st of
; every month on
0,15,30,45 0,6,12,18 1,15,31 * * backup c:\*.* d:\ /s
; at noon on every day, if it is a weekday (Mo-Fri):
0 12 * * 1-5 XCOPY Q:\* D:\ /s
; every minute in January, March, May, July, September and November:
* * * 1,3,5,7,9,11 * dir c:\*.cmd
# at the last day of the year at 23:01, 23:02, 23:03, 23:05, 23:20, 23:21,
# 23:22, 23:23, 23:24, 23:25, 23:30, 23:31, 23:32, 23:33, 23:34, 23:35,
# 23:59
1,2,3,5,20-25,30-35,59 23 31 12 * COPY D:\*.log E:\backup
; make backups of OS2.INI and OS2SYS.INI on every first monday of a month,
; at 9 o'clock in the morning
0 9 1-7 * 1 showini /bt d:\os2\os2.ini
0 9 1-7 * 1 showini /bt d:\os2\os2sys.ini
; at midnight on every month:
0 0 1 * * tapebackup /all
; execute every minute, no restrictions:
* * * * * @ECHO Hi, I am Nr. 2 to be echoed every minute & pause
# execute every minute in January, February, March only !
* * * 1,2,3 * any-command any-arguments
# execute every day at midnight
0 0 * * * any-command any-arguments
# execute every wednesday at midnigth !
0 0 * * 3 any-command any-arguments
# this is a comment which concludes the sample file ===========================
Rony G. Flatscher,
Vienna/Austria/Europe,
Wirtschaftsuniversitaet Wien
1992-11-08