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.\"     Title: call_usermodehelper_exec
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
.\"      Date: January 2017
.\"    Manual: Module Support
.\"    Source: Kernel Hackers Manual 4.8.15
.\"  Language: English
.\"
.TH "CALL_USERMODEHELPER_" "9" "January 2017" "Kernel Hackers Manual 4\&.8\&." "Module Support"
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.SH "NAME"
call_usermodehelper_exec \- start a usermode application
.SH "SYNOPSIS"
.HP \w'int\ call_usermodehelper_exec('u
.BI "int call_usermodehelper_exec(struct\ subprocess_info\ *\ " "sub_info" ", int\ " "wait" ");"
.SH "ARGUMENTS"
.PP
\fIsub_info\fR
.RS 4
information about the subprocessa
.RE
.PP
\fIwait\fR
.RS 4
wait for the application to finish and return status\&. when UMH_NO_WAIT don\*(Aqt wait at all, but you get no useful error back when the program couldn\*(Aqt be exec\*(Aqed\&. This makes it safe to call from interrupt context\&.
.RE
.SH "DESCRIPTION"
.PP
Runs a user\-space application\&. The application is started asynchronously if wait is not set, and runs as a child of system workqueues\&. (ie\&. it runs with full root capabilities and optimized affinity)\&.
.SH "COPYRIGHT"
.br