PMGETUSERNAME(3)

💖 PMGETUSERNAME(3) 💖

okay bestie, welcome to the pmGetUsername page from the Library Functions Manual — she's cute, she's tiny, and she's here to hand you a username. let's get into it 🫶

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✨ NAME ✨

pmGetUsername — fetch that special PCP username 💅

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🌸 C SYNOPSIS 🌸

#include <pcp/pmapi.h>

int pmGetUsername(char **username);

cc ... -lpcp

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🦋 DESCRIPTION 🦋

so inside the Performance Co-Pilot (PCP), some apps use a special non-root username so they can get access to stuff — like writing log files into directories that are, uh, protected 🔒. it's giving "let me in, I'm on the list."

pmGetUsername returns that name back to you via username. periodt.

here's the tea on how it actually decides 👇

• the variable name PCP_USER gets fetched using pmGetOptionalConfig(3).
• if that succeeds, pmGetUsername returns 1. slay ✨
• otherwise, username is set to the default value of pcp, and pmGetUsername returns 0. not the vibe, but it's fine, we recover 🙈

and ngl, the way that pmGetUsername is most often used? it's paired up with pmSetProcessIdentity(3) right at process start up. iconic duo behavior, honestly. they do everything together 💖

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👑 SEE ALSO 👑

PMAPI(3), pmGetOptionalConfig(3) and pmSetProcessIdentity(3) — go read those next, iykyk 📚

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and that's the whole page, bestie!! this one came from the Performance Co-Pilot (that's the PCP in the corner, fr fr) and it's part of the PCP library functions manual. mwah, go call some functions 💜🎀