PR_GET_FPEXC(2const)

💖 PR_GET_FPEXC 💖

okay bestie, so this is PR_GET_FPEXC, and it lives in section 2const of the manual — like, it's one of the prctl(2) crew, you know the vibe. And yes, it is exactly as niche as it sounds, but it's also kind of iconic, so let's go. 🫶

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✨ NAME ✨

PR_GET_FPEXC — get the floating-point exception mode

📚 LIBRARY 📚

Standard C library (libc, -lc) — the classic, no cap.

🎀 SYNOPSIS 🎀

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

int prctl(PR_GET_FPEXC, unsigned int *mode);

🌸 DESCRIPTION 🌸

So what does it actually do? It returns the floating-point exception mode, and it drops that value into the location pointed to by mode. That's it. That's the whole thing. Lowkey elegant honestly. ✨

🔥 RETURN VALUE 🔥

• On success, 0 is returned. slay. 💅
• On error, -1 is returned, and errno is set to indicate the error. not slay. 😭

💀 ERRORS 💀

• EFAULT — mode is an invalid address. like girl, that pointer is not pointing anywhere real. 🙈

👑 STANDARDS 👑

Linux. PowerPC only. so if you're on x86 this is giving "not for you" energy, sorry bestie. 🌈

🦋 HISTORY 🦋

Linux 2.4.21, 2.5.32. (PowerPC) — yeah, it's been around a minute. vintage. 🎀

⭐ SEE ALSO ⭐

• prctl(2)
• PR_SET_FPEXC(2const) — the other half of this duo, the one that sets instead of gets. iykyk. 💜

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and that's the whole page, bestie!! go forth and get your floating-point exception mode 💖✨

this little cutie came to you from Linux man-pages 6.20, dated 2026-02-08, and it's filed under PR_GET_FPEXC(2const) — periodt. 🎀🦋