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Thread: Qt application in embedded linux startup

  1. #1
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    Default Qt application in embedded linux startup

    i have an embedded linux device and an application that has to start after boot.
    linux : Linux 3.12.10-ti2013.12.01 armv7l

    at the end of file "/etc/init.d/rc" , i added this line:

    cd /home/root/ && /home/root/ApplicationName

    it gives error: "Permission denied"
    if i run the application manually one time, then it works fine at every start up.

    i tried the line below but it gives error "command not found"

    cd /home/root/ && chmod +x /home/root/ApplicationName && /home/root/ApplicationName

    how should i start the application?
    note: startup does not have a login.

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    Default Re: Qt application in embedded linux startup

    Quote Originally Posted by hakanaktan View Post
    if i run the application manually one time, then it works fine at every start up.
    Do you do anything special when you do start it manually or are you just repeating the command you have in the startup file?

    Cheers,
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  3. #3
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    Default Re: Qt application in embedded linux startup

    Quote Originally Posted by hakanaktan View Post
    cd /home/root/ && /home/root/ApplicationName
    it gives error: "Permission denied"
    Possibly because:
    1. ApplicationName is not marked executable (as you guessed)
    2. ApplicationName tries to write something somewhere it has no permission and bombs. Perhaps the filesystem is still mounted read-only at that time.
    3. /home/root is on a filesystem marked noexec (which may or may not affect the init process)

    if i run the application manually one time, then it works fine at every start up.
    Maybe, but you are probably running it from a shell with a different environment and after the system is fully booted.
    i tried the line below but it gives error "command not found"
    cd /home/root/ && chmod +x /home/root/ApplicationName && /home/root/ApplicationName
    Probably because the limited embedded Linux does not have a chmod command or it is not in the PATH available at the time. This should not be necessary though, set the x flag on the file once and it should stay.

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    Default Re: Qt application in embedded linux startup

    Quote Originally Posted by ChrisW67 View Post
    /home/root is on a filesystem marked noexec (which may or may not affect the init process)
    Or readonly...
    Your biological and technological distinctiveness will be added to our own. Resistance is futile.

    Please ask Qt related questions on the forum and not using private messages or visitor messages.


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