---
name: "call_usermodehelper_exec"
section: "9"
platform: "linux"
package: "linux-manual-4.9"
version: "4.9.228-1"
release: "Debian 9 (Stretch)"
platforms: ["linux"]
url: "https://new.carta.tech/call_usermodehelper_exec"
---

# call\_usermodehelper\_exec(9)

start a usermode application

## NAME

call\_usermodehelper\_exec - start a usermode application

## SYNOPSIS

**int call\_usermodehelper\_exec(struct subprocess\_info \*** *sub\_info***, int** *wait***);**

## ARGUMENTS

*sub\_info*

information about the subprocessa

*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

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).

## COPYRIGHT