call_usermodehelper(9)

okay bestie, welcome to <call_usermodehelper(9)> — it’s giving Kernel API Manual, section 9, and we are about to make usermode apps happen ✨

🎀 NAME 🎀

call_usermodehelper — prepare and start a usermode application 🚀

✨ SYNOPSIS ✨

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

💅 ARGUMENTS 💅

• path — path to usermode executable. yes bestie, the actual path 🛣️
• argv — arg vector for process. all the args, lined up cute 🧾
• envp — environment for process. the vibes/environment it gets 🌿
• 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 — like, those two are the setup/exec besties and this is the wrapper vibe 🫶

👑 SEE ALSO 👑

• Kernel file ./kernel/umh.c
• __usermodehelper_set_disable_depth(9)
• __usermodehelper_disable(9)
• call_usermodehelper_setup(9)
• call_usermodehelper_exec(9)

cute sign-off: source/version <./kernel>, date <October 2026>, page <call_usermodehelper(9)> — periodt, mwah 💋