On 26 Dec 2005 06:58:40 -0000, Navdeep <singh_nav00@xxxxxxxxxxxxxx> wrote: > > On Sun, 25 Dec 2005 gb spam wrote : > > > I created a GUI application on QT 3.1 on red HAT LINUX. Now i want to run this application automatically just after log in as ROOT. How can i do this . If I want to run my application daily at 4:30 PM then what to do for it. > > > > > > I tried it using cron but could not successful . Any idea will be appriciable. > > > >cron does not have a display associated with it, so your gui app will > >die. check root's mail, by default all output (errors in this case) > > from the job will be mailed to the user. > > > >you could try the following: > > > >DISPLAY=:0.0 > > > >in the script, but you'll need to do some xhost stuff for each user > >that may be logged in on the GUI. > > > OK , I have no idea to write AND COMPILE THE scripting language. > But i tried in below fashion at sch.sh file > > #!/bin/sh > sh /root/QT/QTDesigner/scheduler/scheduler > DISPLAY=:0.0 > > > Now i tried to run it by # sc sch.sh but it says > > : cannot execute binary file > > > How to come out this problem > > Regards You are succesfully calling the script but it is failing when it reaches the second line. In your script you call your binary QT application as: sh /root/QT/QTDesigner/scheduler/scheduler This will definitely not work and that is the cause of your "cannot execute binary file" message. If I understand correctly, scheduler is not a shell script. Therefore, when calling it in a script all you need to do is /root/QT/QTDesigner/scheduler/scheduler If you call "sh <file>" then the sh shell will try to open the file and execute it as a shell script. Also, you will need to set any environment variables _before_ calling your program. I would rewrite your script like this: #!/bin/sh MY_PROGRAM_DIR=/root/QT/QTDesigner/scheduler/scheduler DISPLAY=:0:0 export DISPLAY cd MY_PROGRAM_DIR ./scheduler # end of script BTW, I agree with other posts suggesting that writing a GUI app to run a scheduled task is a bad idea. You have no idea if :0.0 will be a valid display when the script is run, also, you won't know to whom it belongs. -- Kind regards, John Francis
