POSIX_SPA...S_DESTROY(3P)

πŸ’– POSIX_SPA...S_DESTROY(3P) πŸ’–

okay bestie, we're in the POSIX Programmer's Manual today, and this one's a lil pair of functions that init and destroy your spawn file actions object. yes it's advanced realtime. yes you're gonna slay. let's go 🫢


✨ PROLOG ✨

so real talk first: this manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ β€” like, consult the corresponding Linux manual page for details of Linux behavior β€” or honestly the interface may not be implemented on Linux at all. vibe check your platform first, bestie πŸ’…


🌸 NAME 🌸

posix_spawn_file_actions_destroy, posix_spawn_file_actions_init β€” destroy and initialize spawn file actions object (ADVANCED REALTIME) πŸ‘‘


πŸ¦‹ SYNOPSIS πŸ¦‹

#include <spawn.h>

int posix_spawn_file_actions_destroy(posix_spawn_file_actions_t
    *file_actions);
int posix_spawn_file_actions_init(posix_spawn_file_actions_t
    *file_actions);

πŸ’œ DESCRIPTION πŸ’œ

so posix_spawn_file_actions_destroy() shall destroy the object referenced by file_actions; the object becomes, in effect, uninitialized. like it's gone, it's giving ghosting ✨

and listen β€” an implementation may cause posix_spawn_file_actions_destroy() to set the object referenced by file_actions to an invalid value. so don't be looking at it afterwards, okay?

the good news: a destroyed spawn file actions object can be reinitialized using posix_spawn_file_actions_init(). the results of otherwise referencing the object after it has been destroyed are undefined πŸ’€ so like. don't.

now posix_spawn_file_actions_init() shall initialize the object referenced by file_actions to contain no file actions for posix_spawn() or posix_spawnp() to perform. clean slate, fresh start, new semester energy 🌈

a spawn file actions object is as defined in posix_spawn_file_actions_addclose().

🚨 the effect of initializing an already initialized spawn file actions object is undefined. not me double-initializing... don't do that bestie 😭

⭐ RETURN VALUE ⭐

Upon successful completion, these functions shall return zero; otherwise, an error number shall be returned to indicate the error. zero = ate. nonzero = the universe is telling you something πŸ’…


πŸ”₯ ERRORS πŸ”₯

The posix_spawn_file_actions_init() function shall fail if:

  • ENOMEM β€” Insufficient memory exists to initialize the spawn file actions object. she's out of RAM, it's not her fault πŸ₯Ί

The posix_spawn_file_actions_destroy() function may fail if:

  • EINVAL β€” The value specified by file_actions is invalid. that pointer is not it, bestie πŸ™ˆ

The following sections are informative. (iykyk β€” informational, not normative ✨)


πŸŽ€ EXAMPLES πŸŽ€

None.

literally none. we're just built different. not a single example. iconic behavior honestly 🫢


🌸 APPLICATION USAGE 🌸

These functions are part of the Spawn option and need not be provided on all implementations. so like, check before you assume, no cap 🌈


πŸ’œ RATIONALE πŸ’œ

Refer to the RATIONALE section in posix_spawn_file_actions_addclose(). the lore is over there, go read it πŸ“š


πŸ¦‹ FUTURE DIRECTIONS πŸ¦‹

None.

the future is bright and empty and full of possibilities πŸ’–


🌟 SEE ALSO 🌟

  • posix_spawn()
  • posix_spawn_file_actions_addclose()

The Base Definitions volume of POSIX.1‐2017, <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 β€” the POSIX Programmer's Manual era, before your time but honestly still serving ✨ stay initialized, stay destroyed, never both at once πŸ’–πŸ’…

πŸ“¦ where this page comes from