CRONTAB.SYS

Name

CRONTAB.SYS -- Event Control File (optional).

Description

This optional file allows XRPi commands to be executed at certain times of the day, week, month or year.

A few of the possible uses would be:

Additional AX25 beacons.
Beaconning APRS objects, status, bulletins and announcements.
Adjusting Netrom / IP routing to account for part-time neighbours.
Enabling / disabling transmitters.
Controlling peripherals via the CTRL port.
Adjusting parameters to cope with diurnal propogation changes.
Loading updated ENCAP.TXT at intervals.
Enabling / disabling IGATE at certain times of day / week.
Automatic reboots / restarts / exits for batch file processing etc.

When commands are executed from CRONTAB.SYS, all responses from the command processor are discarded.

File format

Each entry is specified on a seperate line. Empty lines, and lines beginning with '#' or ';' are ignored.

Entries have the following format:

	<min> <hour> <date> <month> <day> <command> [args]
	0-59   0-23   1-31   1-12    0-6

Fields must be seperated by one or more spaces or tabs.

<command> is executed if <min> <hour> and <month> match the current time, and either the <date> (day of month) or <day> (of week) match. [args] specifies the command's argument(s).

Dates / times may be specified as single numbers, multiple numbers, ranges, or a mixture thereof, e.g. "0-5,7,9,15-22". Note there must be no spaces within the string of characters.

Use '*' in any of the first 5 fields to signify "all".

Examples

; <min> <hour> <date> <month> <day> <command> [args]
; Every 20 mins, advertise the BBS using an APRS symbol
; on port 13
0,20,40 * * * * send 13 APZ179 !5224.00N/00215.00WB GB7PZT

; Every Thursday at 03:05 save nodes table to an archive
5 3 * * 4 SAVENODES PZTNODES.ACV

See Also

BOOTCMDS.SYS -- Startup Commands File