CALL_USERMODEHELPER_ - Online Linux Manual PageSection : 9
Updated : June 2018
Source : Kernel Hackers Manual 2​.6​.
Note : Module Support

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NAMEcall_usermodehelper_exec − start a usermode application

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SYNOPSISint call_usermodehelper_exec(struct subprocess_info * sub_info, enum umh_wait wait);

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ARGUMENTSsub_info information about the subprocessa wait wait for the application to finish and return status​. when −1 don´t wait at all, but you get no useful error back when the program couldn´t be exec´ed​. This makes it safe to call from interrupt context​.

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DESCRIPTIONRuns a user−space application​. The application is started asynchronously if wait is not set, and runs as a child of keventd​. (ie​. it runs with full root capabilities)​.

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