centos man page for call_usermodehelper

CALL_USERMODEHELPER(9)						  Module Support					    CALL_USERMODEHELPER(9)

NAME
       call_usermodehelper - prepare and start a usermode application

SYNOPSIS
       int call_usermodehelper(char * path, char ** argv, char ** envp, int wait);

ARGUMENTS
       path
	   path to usermode executable

       argv
	   arg vector for process

       envp
	   environment for process

       wait
	   wait for the application to finish and return status. when UMH_NO_WAIT 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
       This function is the equivalent to use call_usermodehelper_setup and call_usermodehelper_exec.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						    CALL_USERMODEHELPER(9)