exit_group(2)

💅 exit_group(2) — the "everybody out" system call 💅

okay bestie, so this is a page from the System Calls Manual, and it's literally the drama queen of process shutdown. no cap. let's get into it ✨

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🦋 NAME 🦋

exit_group — exit all threads in a process

periodt. not one thread. not your fav thread. ALL of them.

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📚 LIBRARY 📚

Standard C library (libc, -lc)

yes bestie, it lives in the classic libc 💖

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✨ SYNOPSIS ✨

#include <sys/syscall.h>       /* Definition of SYS_* constants */
#include <unistd.h>

[[noreturn]] void syscall(SYS_exit_group, int status);

🚨 Note: glibc provides no wrapper for exit_group(), necessitating the use of syscall(2). so yeah, you gotta go through syscall(2) yourself. it's giving "no shortcuts", iykyk 😭

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🌸 DESCRIPTION 🌸

so what does it actually do? this system call terminates all threads in the calling process's thread group. that's it. that's the whole vibe. your whole little thread group? gone. bye. 💀

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🎀 RETURN VALUE 🎀

it does not return. literally never comes back. not even a little. it's the main character walking out of the room and never looking back 👑

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👑 STANDARDS 👑

Linux. that's it, that's the standard 🌈

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🕰️ HISTORY 🕰️

Linux 2.5.35. vintage but iconic, fr fr ✨

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💜 NOTES 💜

• Since glibc 2.3, this is the system call invoked when the _exit(3) wrapper function is called. so like, when you call _exit(3), this is what's actually running underneath. sneaky little icon 🧚

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🔥 SEE ALSO 🔥

• exit(2)
• _exit(3)

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and that's the page, bestie!! go forth and exit your thread groups responsibly 🫶

this lil cutie came from the Linux man-pages 6.20, dated 2026-06-05. mwah, love that for us 💖🌸🎀