POSIX_SPA...SIGDEFAULT(3P)

💖 POSIX_SPA...SIGDEFAULT(3P) 💖

okay so bestie, we're in the POSIX Programmer's Manual rn, and this page is the one about the spawn-sigdefault attribute. it's giving ✨advanced realtime✨ energy, iykyk.

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🦋 PROLOG 🦋

This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the corresponding Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.

not me warning you upfront that Linux might be doing its own lil thing here 💀 always check the Linux man page bestie, fr fr.

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🌸 NAME 🌸

posix_spawnattr_getsigdefault, posix_spawnattr_setsigdefault — get and set the spawn-sigdefault attribute of a spawn attributes object (ADVANCED REALTIME)

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✨ SYNOPSIS ✨

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

int posix_spawnattr_getsigdefault(const posix_spawnattr_t
    *restrict attr, sigset_t *restrict sigdefault);
int posix_spawnattr_setsigdefault(posix_spawnattr_t *restrict attr,
    const sigset_t *restrict sigdefault);

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💅 DESCRIPTION 💅

so like, two functions, one attribute, main character energy all around 🫶

• The posix_spawnattr_getsigdefault() function shall obtain the value of the spawn-sigdefault attribute from the attributes object referenced by attr.
• The posix_spawnattr_setsigdefault() function shall set the spawn-sigdefault attribute in an initialized attributes object referenced by attr.

now the actual tea on what this attribute even is 🍓

The spawn-sigdefault attribute represents the set of signals to be forced to default signal handling in the new process image (if POSIX_SPAWN_SETSIGDEF is set in the spawn-flags attribute) by a spawn operation. The default value of this attribute shall be an empty signal set.

periodt. no flags, no forcing — it's just an empty set chilling by default 💜

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🔥 RETURN VALUE 🔥

Upon successful completion, posix_spawnattr_getsigdefault() shall return zero and store the value of the spawn-sigdefault attribute of attr into the object referenced by the sigdefault parameter; otherwise, an error number shall be returned to indicate the error.

Upon successful completion, posix_spawnattr_setsigdefault() shall return zero; otherwise, an error number shall be returned to indicate the error.

zero = slay, anything else = error number, that's the whole vibe check ✅

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😭 ERRORS 😭

These functions may fail if:

• EINVAL — The value specified by attr is invalid.

The posix_spawnattr_setsigdefault() function may fail if:

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

The following sections are informative.

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🎀 EXAMPLES 🎀

None.

yeah bestie, nothing here, it's giving empty 😭

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🌈 APPLICATION USAGE 🌈

These functions are part of the Spawn option and need not be provided on all implementations.

so like… it might just not exist on your system?? not every implementation showed up to the party 🙈

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⭐ RATIONALE ⭐

None.

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🦄 FUTURE DIRECTIONS 🦄

None.

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👑 SEE ALSO 👑

posix_spawn(), posix_spawnattr_destroy(), posix_spawnattr_getflags(), posix_spawnattr_getpgroup(), posix_spawnattr_getschedparam(), posix_spawnattr_getschedpolicy(), posix_spawnattr_getsigmask()

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

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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. 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 💖 courtesy of IEEE/The Open Group, 2017 — go forth and spawn responsibly, ily, mwah 💅✨