PMDERIVEDERRSTR(3)

💅 PMDERIVEDERRSTR(3) — pmDerivedErrStr 💅

okay bestie, listen up — this is the Library Functions Manual page for pmDerivedErrStr, and honestly? She's tiny but she's mighty. 🎀

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✨ NAME ✨

pmDerivedErrStr — return error message from failure to parse derived metric definition 🫶

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🌸 C SYNOPSIS 🌸

#include <pcp/pmapi.h>

char *pmDerivedErrStr(void);

cc ... -lpcp

yes she takes no args, yes she returns a char *, no we are not overthinking it 💜

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🦋 DESCRIPTION 🦋

So here's the vibe. When you call pmRegisterDerived(3) to add a new derived metric definition, and something goes wrong — like, an error happens, bestie, it's giving chaos 😭 — you can then call pmDerivedErrStr to get the associated error message back. That's the whole job. She's the receipts. 🧾✨

like, pmRegisterDerived throws the party and things go sideways, and pmDerivedErrStr is the one who tells you what went sideways.

Also, lowkey important: the pmRegisterDerivedMetric interface is a convenience wrapper around both pmRegisterDerived and pmDerivedErrStr. So if you're feeling lazy (valid, no judgment 🙈), that one does the two-step for you. Iconic behaviour honestly. 👑

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🌈 SEE ALSO 🌈

• PCPIntro(1)
• PMAPI(3)
• pmRegisterDerived(3)

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and that's the whole page, bestie — short, sweet, and she ate 💅✨ This one comes to you from Performance Co-Pilot, living under the name PMDERIVEDERRSTR(3). No date on the footer, so don't come for me, I'm just telling you what she said. 🎀🫶💖