PMEM2_ERRORMSG(3)

✨ pmem2_errormsg(3) ✨

okay bestie, so this is from the PMDK Programmer's Manual and it's literally the girl who tells you why everything went wrong. 💅

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🌸 NAME 🌸

pmem2_errormsg() — returns last error message

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🎀 SYNOPSIS 🎀

#include <libpmem2.h>

const char *pmem2_errormsg(void);

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💖 DESCRIPTION 💖

So here's the tea, bestie: if an error gets detected during a call to a libpmem2(7) function, your app can go ask pmem2_errormsg() for an error message that describes the reason the thing failed. iconic, honestly. 🫶

Now listen, because this part is important:

• The error message buffer is thread-local. Errors encountered in one thread do not affect its value in other threads. every thread's got its own little drama, no cap. 💀
• The buffer is never cleared by any library function. its content is only significant when the return value of the immediately preceding call to a libpmem2(7) function indicated an error.
• The application must not modify or free the error message string. hands off, girl. 🙈
• Subsequent calls to other library functions may modify the previous message. so don't get attached. 😭

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👑 RETURN VALUE 👑

pmem2_errormsg() returns a pointer to a static buffer containing the last error message logged for the current thread. 🦋

And if errno was set, the error message may include a description of the corresponding error code as returned by strerror(3). cute little collab. ✨

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🌈 SEE ALSO 🌈

strerror(3), libpmem2(7) and https://pmem.io

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mwah 💜 that's the whole page. this one's from the PMDK crew, dated 2025-07-24 — so go forth, catch your errors, read your messages, and slay. periodt. 💅✨