GETPGRP(3P)

✨ GETPGRP(3P) ✨

okay bestie, welcome to the POSIX Programmer's Manual 💖 this one is GETPGRP(3P) and it's giving "short and sweet and unbothered" energy.

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🫶 PROLOG

so like, real talk first: this manual page is part of the POSIX Programmer's Manual. the Linux implementation of this interface may differ (so pls go consult the corresponding Linux manual page for the deets on Linux behavior), or honestly the interface may not be implemented on Linux at all. not me warning you before we even start 💀

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👑 NAME

getpgrp — get the process group ID of the calling process. that's it. that's the whole job. iconic.

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🌸 SYNOPSIS

#include <unistd.h>

pid_t getpgrp(void);

no args, no drama, no extra params. she takes void and she means it 💅

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🦋 DESCRIPTION

the getpgrp() function shall return the process group ID of the calling process. literally just hands you back the process group ID of whoever called her. no thoughts, just vibes and one return value ✨

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🌈 RETURN VALUE

getpgrp() shall always be successful and no return value is reserved to indicate an error. she does not fail. she does not have a bad day. there's no error code sitting in the return value waiting to ambush you. periodt. 🎀

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💜 ERRORS

No errors are defined. none. zero. the error section is empty because she simply does not miss. 🫶

the following sections are informative, btw — so like, supplementary reading, not the binding stuff.

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🍓 EXAMPLES

None. no examples bestie, she's self-explanatory and she knows it 😌

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🧚 APPLICATION USAGE

None. nothing to add. no notes. she's complete as she is 💅

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🔥 RATIONALE

okay so this is the tea ☕ — history time:

4.3 BSD provides a getpgrp() function that returns the process group ID for a specified process. sounds fancy right? but here's the thing — although this function supports job control, all known job control shells always specify the calling process with this function. like, every single one. so the extra flexibility was just sitting there unused.

so the simpler System V getpgrp() suffices, and the added complexity of the 4.3 BSD getpgrp() is provided by the XSI extension getpgid(). they didn't delete the fancy version, they just moved it to a different function and kept this one minimal. ate and left no crumbs 🔥

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⭐ FUTURE DIRECTIONS

None. she's staying exactly as she is. no glow-up needed, she's already that girl. ✨

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💖 SEE ALSO

• exec
• fork()
• getpgid()
• getpid()
• getppid()
• kill()
• setpgid()
• setsid()

also from the Base Definitions volume of POSIX.1‐2017:

• <sys_types.h>
• <unistd.h>

go read those if you want the full lore 🦋

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🎀 COPYRIGHT

okay legal bestie moment, gotta say it properly:

Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1-2017, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 7, 2018 Edition, Copyright (C) 2018 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html .

Any typographical or formatting errors that appear in this page are most likely to have been introduced during the conversion of the source files to man page format. To report such errors, see https://www.kernel.org/doc/man-pages/reporting_bugs.html .

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💀 fr fr, if you spot a typo, it's a conversion glitch, not canon. don't come for the standard, come for the conversion script.

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and that's the whole page bestie!! brought to you by IEEE/The Open Group, 2017 — the GETPGRP(3P) girlies stay winning 👑💖 mwah, go get those process group IDs 🫶