How to run a command when any process starts?











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I have an sh script to update my wallpaper which uses pscircle in order to display running processes. The script runs every five seconds to update the wallpaper, but I would like it so that the script runs whenever any process starts or stops. Is this possible?



Edit 1: Could also just make it check the number of processes running under my user name



Edit 2: Might have to add an exception for pscircle itself






linux bash script sh







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  • While it might be possible, it would also be a big mistake: When the pscircle process starts it would create another trigger, which would start pscircle ...
    – Eugen Rieck
    Dec 1 at 20:13










  • Ah yea I didn't realize that. Might have to create an exception of some sort
    – The Forgotten King
    Dec 1 at 20:14






  • 2




    And of course you start pscircle with a bash script, so there is another exception, and the wallpaper change starts a dbus session, creating another process, plus what cron and friends do ... you'd end up with your system being quite busy just changing wallpapers.
    – Eugen Rieck
    Dec 1 at 20:16










  • What stops you from using a load indicator applet and do the pscircle magic only every few seconds?
    – Eugen Rieck
    Dec 1 at 20:17










  • @EugenRieck is completely right here. In just a second over 100 processes can start and stop in that same second (processes like forking web servers). Changing your wallpaper that frequently will just crash your system.
    – Fanatique
    Dec 1 at 21:18















up vote
0
down vote

favorite












I have an sh script to update my wallpaper which uses pscircle in order to display running processes. The script runs every five seconds to update the wallpaper, but I would like it so that the script runs whenever any process starts or stops. Is this possible?



Edit 1: Could also just make it check the number of processes running under my user name



Edit 2: Might have to add an exception for pscircle itself






linux bash script sh







share|improve this question
























  • While it might be possible, it would also be a big mistake: When the pscircle process starts it would create another trigger, which would start pscircle ...
    – Eugen Rieck
    Dec 1 at 20:13










  • Ah yea I didn't realize that. Might have to create an exception of some sort
    – The Forgotten King
    Dec 1 at 20:14






  • 2




    And of course you start pscircle with a bash script, so there is another exception, and the wallpaper change starts a dbus session, creating another process, plus what cron and friends do ... you'd end up with your system being quite busy just changing wallpapers.
    – Eugen Rieck
    Dec 1 at 20:16










  • What stops you from using a load indicator applet and do the pscircle magic only every few seconds?
    – Eugen Rieck
    Dec 1 at 20:17










  • @EugenRieck is completely right here. In just a second over 100 processes can start and stop in that same second (processes like forking web servers). Changing your wallpaper that frequently will just crash your system.
    – Fanatique
    Dec 1 at 21:18













up vote
0
down vote

favorite









up vote
0
down vote

favorite











I have an sh script to update my wallpaper which uses pscircle in order to display running processes. The script runs every five seconds to update the wallpaper, but I would like it so that the script runs whenever any process starts or stops. Is this possible?



Edit 1: Could also just make it check the number of processes running under my user name



Edit 2: Might have to add an exception for pscircle itself






linux bash script sh







share|improve this question















I have an sh script to update my wallpaper which uses pscircle in order to display running processes. The script runs every five seconds to update the wallpaper, but I would like it so that the script runs whenever any process starts or stops. Is this possible?



Edit 1: Could also just make it check the number of processes running under my user name



Edit 2: Might have to add an exception for pscircle itself






linux bash script sh




linux bash script sh






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Dec 1 at 20:14

























asked Dec 1 at 20:10









The Forgotten King

11




11












  • While it might be possible, it would also be a big mistake: When the pscircle process starts it would create another trigger, which would start pscircle ...
    – Eugen Rieck
    Dec 1 at 20:13










  • Ah yea I didn't realize that. Might have to create an exception of some sort
    – The Forgotten King
    Dec 1 at 20:14






  • 2




    And of course you start pscircle with a bash script, so there is another exception, and the wallpaper change starts a dbus session, creating another process, plus what cron and friends do ... you'd end up with your system being quite busy just changing wallpapers.
    – Eugen Rieck
    Dec 1 at 20:16










  • What stops you from using a load indicator applet and do the pscircle magic only every few seconds?
    – Eugen Rieck
    Dec 1 at 20:17










  • @EugenRieck is completely right here. In just a second over 100 processes can start and stop in that same second (processes like forking web servers). Changing your wallpaper that frequently will just crash your system.
    – Fanatique
    Dec 1 at 21:18


















  • While it might be possible, it would also be a big mistake: When the pscircle process starts it would create another trigger, which would start pscircle ...
    – Eugen Rieck
    Dec 1 at 20:13










  • Ah yea I didn't realize that. Might have to create an exception of some sort
    – The Forgotten King
    Dec 1 at 20:14






  • 2




    And of course you start pscircle with a bash script, so there is another exception, and the wallpaper change starts a dbus session, creating another process, plus what cron and friends do ... you'd end up with your system being quite busy just changing wallpapers.
    – Eugen Rieck
    Dec 1 at 20:16










  • What stops you from using a load indicator applet and do the pscircle magic only every few seconds?
    – Eugen Rieck
    Dec 1 at 20:17










  • @EugenRieck is completely right here. In just a second over 100 processes can start and stop in that same second (processes like forking web servers). Changing your wallpaper that frequently will just crash your system.
    – Fanatique
    Dec 1 at 21:18
















While it might be possible, it would also be a big mistake: When the pscircle process starts it would create another trigger, which would start pscircle ...
– Eugen Rieck
Dec 1 at 20:13




While it might be possible, it would also be a big mistake: When the pscircle process starts it would create another trigger, which would start pscircle ...
– Eugen Rieck
Dec 1 at 20:13












Ah yea I didn't realize that. Might have to create an exception of some sort
– The Forgotten King
Dec 1 at 20:14




Ah yea I didn't realize that. Might have to create an exception of some sort
– The Forgotten King
Dec 1 at 20:14




2




2




And of course you start pscircle with a bash script, so there is another exception, and the wallpaper change starts a dbus session, creating another process, plus what cron and friends do ... you'd end up with your system being quite busy just changing wallpapers.
– Eugen Rieck
Dec 1 at 20:16




And of course you start pscircle with a bash script, so there is another exception, and the wallpaper change starts a dbus session, creating another process, plus what cron and friends do ... you'd end up with your system being quite busy just changing wallpapers.
– Eugen Rieck
Dec 1 at 20:16












What stops you from using a load indicator applet and do the pscircle magic only every few seconds?
– Eugen Rieck
Dec 1 at 20:17




What stops you from using a load indicator applet and do the pscircle magic only every few seconds?
– Eugen Rieck
Dec 1 at 20:17












@EugenRieck is completely right here. In just a second over 100 processes can start and stop in that same second (processes like forking web servers). Changing your wallpaper that frequently will just crash your system.
– Fanatique
Dec 1 at 21:18




@EugenRieck is completely right here. In just a second over 100 processes can start and stop in that same second (processes like forking web servers). Changing your wallpaper that frequently will just crash your system.
– Fanatique
Dec 1 at 21:18















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