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OS/2 Shareware BBS: 18 REXX
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1992-06-10
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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 [/Test] 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
percent-sign (%) is treated like any other character; empty lines and ones
starting with a semi-colon (;) are ignored.
If switch '/Test' is given, the file is read and the user is presented
with the date/times and commands to be executed.
Examples
========
CRONRGF d:\os2\system\crontab
... execute statements in file 'crontab' located in "D:\OS2\SYSTEM"
CRONRGF /TEST testcron
... execute statements in file 'testcron' in testmode
LAYOUT of the control file
==========================
minute hour day month weekday command
--- or ---
* * * * * 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 specify a list of values, separated by a comma (,), e.g. "1,3,7"
you can specify a range of values, separated by a dash (-), e.g. "1-5"
you can specify a star (*) instead of a value, meaning entire range of all valid
values
Blank lines and ones starting with a semi-colomn (;) are ignored. A command will
only be executed if ALL critereiae are fullfilled, i.e. only if the specified
minute, hour, day, month and weekday arrived.
Sample file
===========
; This is a comment (starts with a semicolumn) =================================
; empty lines are ignored too...
;
; the given command is only executed when all criteria are fullfilled !
;
; 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
; weekdays only
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:
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
; 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
; execute every day at midnight
0 0 * * * any-command
; execute every wednesday at midnigth !
0 0 * * 3 any-command
; this is a comment which concludes the sample file ===========================
Rony G. Flatscher,
Vienna/Austria/Europe,
Wirtschaftsuniversitaet Wien
1992-06-10