NAME call_usermodehelper_exec - start a usermode application

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

ARGUMENTS sub_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.

DESCRIPTION Runs 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).

COPYRIGHT Kernel Hackers Manual 2.6. November 2013 CALL_USERMODEHELPER_(9)