PR_GET_ENDIAN(2const)

✨ PR_GET_ENDIAN(2const) ✨

okay bestie, welcome to the PR_GET_ENDIAN page — it's literally just a little guy that tells you which way your bytes are facing 💅 (this is a <pink>2const</pink> page, meaning it's one of the prctl(2) constants, not its own syscall, iykyk)

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💖 NAME 💖

PR_GET_ENDIAN — get the endianness of the calling process 🦋

📚 LIBRARY 📚

Standard C library (libc, -lc) — yes queen, just link the normal libc and you're good 🌸

🎀 SYNOPSIS 🎀

#include <linux/prctl.h>  /* Definition of PR_* constants */
#include <sys/prctl.h>

int prctl(PR_GET_ENDIAN, int *endianness);

🌈 DESCRIPTION 🌈

So basically, you hand it a pointer and it goes "bestie, here's the endianness of the calling process" and drops that answer right at the location that endianness points to. That's it. That's the whole vibe. ✨

🔥 RETURN VALUE 🔥

• On success, 0 is returned. slay. 👑
• On error, -1 is returned, and errno is set to tell you exactly what went wrong 😭 (so always check it, fr fr)

💀 ERRORS 💀

• EFAULT — endianness is an invalid address. girl. that pointer is not it 🙈

🌟 STANDARDS 🌟

Linux. PowerPC only. (yes, only — this one is niche and it knows it 💅)

🦋 HISTORY 🦋

Linux 2.6.18 (PowerPC). vintage. iconic. 🎀

👀 SEE ALSO 👀

• prctl(2)
• PR_SET_ENDIAN(2const)

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okay that's the whole page, you're literally an endianness expert now, no cap 💜 This was brought to you by Linux man-pages 6.20, dated 2026-02-08 — mwah, go forth and prctl responsibly 🫶✨