Cron entry for C script

[chetana07]

Hello,
how to give the crontab entry for the executable script written in C language.
Any answer will be helpful.

[Peter Godron]

Hi,
its the same format as any other program or script:
0 * * * * /<script>

see "man cron" and "man crontab"

Just be aware that you do not have a "full" environment when you run from cron, so anything like $ORACLE_HOME etc you have to make known to the program !


Please also read:
http://forums1.itrc.hp.com/service/forums/helptips.do?#33
on how to reward any useful answers given to your questions.

[Yogeeraj_1]

hi,

the entry would be same as any other script that have scheduled previously.


all you have to ensure is that it is being run under the appropriate environment.

e.g.

#******************************************************
23 15 * * * echo "/home/chetana07/cprog/demo01; exit"|su - oracle 1> /tmp/output_demo01.crn
2> /tmp/error_demo01.crn

#******************************************************
# END OF TABLE day0->Sunday day6->Saturday
#******************************************************


kind regards
yogeeraj

[Volker Borowski]

May be I get something wrong here...

There is no way to execute a script in C-Language. You need to compile it using a C-Compiler and will receive a binary file that can be scheduled like any other program.

If you are refering to csh-script, the problem is, that cron runs sh. So you need to execute the csh itself and give your script as a parameter like

/usr/bin/csh -c /home/myscripts/thisone.csh

Hope this helps
Volker

[A. Clay Stephenson]

Assuming that you have a csh script that will run under cron's sparse environment (ie the script itself sets and exports any needed environment variables -- especially PATH) then all you need to do is to make sure that the very first line of your csh script contains a "shebang" line:
#!/usr/bin/csh

This will cause the script to be run as a csh script regardless of the shell invoked by cron.

[chetana07]

Thanks a lot for the response