GETSID(3P)

🦋 GETSID(3P) — the POSIX Programmer's Manual one 🦋

okay bestie, so this page lives in the POSIX Programmer's Manual, which is a whole vibe. 💅

🌸 PROLOG 🌸

This manual page is part of the POSIX Programmer's Manual. Heads up though: the Linux implementation of this interface may differ (so go check the corresponding Linux manual page for the tea on Linux behavior), or honestly the interface may not even be implemented on Linux. it's giving "your mileage may vary", fr fr. 😭

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✨ NAME ✨

getsid — get the process group ID of a session leader 👑

💖 SYNOPSIS 💖

#include <unistd.h>

pid_t getsid(pid_t pid);

🎀 DESCRIPTION 🎀

So getsid() shall obtain the process group ID of the process that is the session leader of the process specified by pid. 🫶

And if pid is (pid_t)0? That specifies the calling process. iykyk — passing zero means "me, myself, and I". 💅

🌈 RETURN VALUE 🌈

Upon successful completion, getsid() shall return the process group ID of the session leader of the specified process. slay. ✨

Otherwise? it shall return -1 and set errno to indicate the error. not slay. 💀

🔥 ERRORS 🔥

The getsid() function shall fail if:

• EPERM — the process specified by pid is not in the same session as the calling process, and the implementation does not allow access to the process group ID of the session leader of that process from the calling process. like, boundaries, bestie. 🚧
• ESRCH — there is no process with a process ID equal to pid. ghosted. 👻

The following sections are informative.

🧚 EXAMPLES 🧚

None.

🍓 APPLICATION USAGE 🍓

None.

💜 RATIONALE 💜

None.

⭐ FUTURE DIRECTIONS ⭐

None.

🦋 SEE ALSO 🦋

exec, fork(), getpid(), getpgid(), setpgid(), setsid()

The Base Definitions volume of POSIX.1‐2017, <unistd.h>

👑 COPYRIGHT 👑

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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and that's the whole page, bestie!! 🎀 it was published by IEEE/The Open Group back in 2017, and yes, the page is literally called GETSID(3P) — iconic behavior. go get those session leaders. 💖✨