POSIX_S...DPOLICY(3POSIX)

💖 posix_spawnattr_getschedpolicy, posix_spawnattr_setschedpolicy 💖

okay so bestie, welcome to the POSIX Programmer's Manual ✨ (yes that's the manual name, she's fancy like that — 3POSIX girlies rise up 🎀)

🫶 quick heads-up before we dive in: this manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (so pls consult the corresponding Linux manual page for the deets on Linux behavior), or honestly the interface might not even be implemented on Linux. no cap. 💀

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✨ NAME ✨

posix_spawnattr_getschedpolicy, posix_spawnattr_setschedpolicy — get and set the spawn-schedpolicy attribute of a spawn attributes object (ADVANCED REALTIME) 🔥

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🌸 SYNOPSIS 🌸

#include <spawn.h>
#include <sched.h>

int posix_spawnattr_getschedpolicy(const posix_spawnattr_t
    *restrict attr, int *restrict schedpolicy);
int posix_spawnattr_setschedpolicy(posix_spawnattr_t *attr,
    int schedpolicy);

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💅 DESCRIPTION 💅

so the way that posix_spawnattr_getschedpolicy() works is: it shall obtain the value of the spawn-schedpolicy attribute from the attributes object that attr is pointing at. she's the reader, she's the getter, she's serving looks. 👑

and posix_spawnattr_setschedpolicy()? she shall set the spawn-schedpolicy attribute in an initialized attributes object referenced by attr. queen behavior, honestly.

okay and the spawn-schedpolicy attribute itself represents the scheduling policy that's gonna be assigned to the new process image in a spawn operation — but ONLY if POSIX_SPAWN_SETSCHEDULER is set in the spawn-flags attribute. conditional girlie. 💖

the default value of this attribute is unspecified 🙈 (iykyk — don't count on it being anything specific).

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🌈 RETURN VALUE 🌈

when posix_spawnattr_getschedpolicy() succeeds, she shall return zero and store the value of the spawn-schedpolicy attribute of attr into the object that the schedpolicy parameter points to. and if it doesn't work out? an error number shall be returned to indicate the error. 😭

and when posix_spawnattr_setschedpolicy() succeeds, she shall return zero. otherwise, an error number shall be returned to indicate the error. periodt. 💅

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🦋 ERRORS 🦋

these functions may fail if:

• EINVAL — the value specified by attr is invalid. 🚫

and the posix_spawnattr_setschedpolicy() function may fail if:

• EINVAL — the value of the attribute being set is not valid. 🚫

🌸 friendly lil note bestie: the following sections are informative. they're the vibes, not the rules.

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🎀 EXAMPLES 🎀

None. bestie we have literally no examples. nothing. empty. she's mysterious. 💀

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⭐ APPLICATION USAGE ⭐

these functions are part of the Spawn and Process Scheduling options, so they need not be provided on all implementations. so like, don't be shocked if your system just... doesn't. 🙈

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💜 RATIONALE 💜

None. no rationale bestie, we simply vibe. ✨

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🔮 FUTURE DIRECTIONS 🔮

None. the future is unclear but the girlies are hopeful. 🦋

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👑 SEE ALSO 👑

• posix_spawn()
• posix_spawnattr_destroy()
• posix_spawnattr_getsigdefault()
• posix_spawnattr_getflags()
• posix_spawnattr_getpgroup()
• posix_spawnattr_getschedparam()
• posix_spawnattr_getsigmask()

also the Base Definitions volume of POSIX.1‐2017 has <sched.h> and <spawn.h> — go read those, they're iconic fr fr 📚

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🌸 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. 💖

⚠️ and this part matters, bestie: 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!! 💅 this lil masterpiece came to you from IEEE/The Open Group, dated 2017, filed under POSIX_S...DPOLICY(3POSIX) — mwah, slay, go write some spawn attributes. 🎀✨🦋