POSIX_SPA...ETSIGMASK(3P)

📦 version 2017a, in alpine 3.22, alpine 3.23, alpine 3.24, arch rolling, nixpkgs unstable, opensuse-leap 16.0

✨ POSIX_SPA...ETSIGMASK ✨

okay bestie, welcome to the POSIX Programmer's Manual 💖 this one is POSIX_SPA...ETSIGMASK(3P) and it's giving advanced realtime spawn energy, so buckle up 🎀

🌸 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 — plot twist 😭 — the interface may not even be implemented on Linux. vibe check your platform, fr fr.

👑 NAME 👑

posix_spawnattr_getsigmask, posix_spawnattr_setsigmask — get and set the spawn-sigmask attribute of a spawn attributes object (ADVANCED REALTIME) ✨

🦋 SYNOPSIS 🦋

#include <signal.h>
#include <spawn.h>

int posix_spawnattr_getsigmask(const posix_spawnattr_t *restrict attr,
    sigset_t *restrict sigmask);
int posix_spawnattr_setsigmask(posix_spawnattr_t *restrict attr,
    const sigset_t *restrict sigmask);

💅 DESCRIPTION 💅

okay so posix_spawnattr_getsigmask() shall obtain the value of the spawn-sigmask attribute from the attributes object referenced by attr. it's the getter, she gets. 💖

and posix_spawnattr_setsigmask() shall set the spawn-sigmask attribute in an initialized attributes object referenced by attr. she sets. periodt.

so what even is the spawn-sigmask attribute? 🧐 it represents the signal mask in effect in the new process image of a spawn operation — but only if POSIX_SPAWN_SETSIGMASK is set in the spawn-flags attribute. conditional queen 👑. and the default value of this attribute is unspecified, which is the manpage way of saying "we're not telling you, don't @ us" 🙈

🌈 RETURN VALUE 🌈

upon successful completion, posix_spawnattr_getsigmask() shall return zero and store the value of the spawn-sigmask attribute of attr into the object referenced by the sigmask parameter 🫶 otherwise, an error number shall be returned to indicate the error. no cap.

upon successful completion, posix_spawnattr_setsigmask() shall return zero; otherwise, an error number shall be returned to indicate the error. same energy, different function 💅

💀 ERRORS 💀

these functions may fail if:

  • EINVAL — the value specified by attr is invalid. not it 😭

the posix_spawnattr_setsigmask() function may fail if:

  • EINVAL — the value of the attribute being set is not valid. she tried, she failed 💀
the following sections are informative — meaning they're the bonus content, not the rules 📖

🍓 EXAMPLES 🍓

None. — literally nothing, bestie. empty. the void. 🕳️✨

🧚 APPLICATION USAGE 🧚

these functions are part of the Spawn option and need not be provided on all implementations. so if you can't find them, it's not you, it's the implementation 💔

🔥 RATIONALE 🔥

None. — no thoughts, head empty, iconic behavior honestly 👑

⭐ FUTURE DIRECTIONS ⭐

None. — the future is... also empty 🦋

🎀 SEE ALSO 🎀

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

the Base Definitions volume of POSIX.1‐2017, <signal.h>, <spawn.h> 🌸

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 🙈

and that's the whole page, bestie!! 🎉 brought to you by IEEE/The Open Group, 2017, signing off on POSIX_SPA...ETSIGMASK(3P) 💖✨ go set your signal masks, you absolute icon 👑💅

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