STRSIGNAL(3P)

💖 STRSIGNAL(3P) 💖

okay bestie, welcome to strsignal(3P) — she lives in the POSIX Programmer's Manual (yes, the whole POSIX squad, we love her) ✨

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🌸 PROLOG 🌸

so like, this manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (fr fr, go check the corresponding Linux manual page for the deets on Linux behavior), or honestly the interface might not even be implemented on Linux. 💀

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✨ NAME ✨

strsignal — get name of signal 🎀

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🦋 SYNOPSIS 🦋

#include <string.h>

char *strsignal(int signum);

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💅 DESCRIPTION 💅

okay so here's the tea. The strsignal() function shall map the signal number in signum to an implementation-defined string and shall return a pointer to it. And it shall use the same set of messages as the psignal() function — matching sets, no cap. 👑

The application shall not modify the string returned. And like, be careful, because the returned pointer might be invalidated, or the string content might get overwritten, by a subsequent call to strsignal() or setlocale(). The returned pointer might also be invalidated if the calling thread is terminated. 😭 so don't go holding onto that pointer like it's your emotional support bestie, okay?

The contents of the message strings returned by strsignal() should be determined by the setting of the LC_MESSAGES category in the current locale. 🌈

The implementation shall behave as if no function defined in this standard calls strsignal().

Since no return value is reserved to indicate an error, an application wishing to check for error situations should set errno to 0, then call strsignal(), then check errno. it's giving "manual vibe check" and honestly? iconic. ⭐

⚠️ and heads up: the strsignal() function need not be thread-safe. so yeah. noted. 🙈

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🎀 RETURN VALUE 🎀

Upon successful completion, strsignal() shall return a pointer to a string. Otherwise, if signum is not a valid signal number, the return value is unspecified. (mysterious. unbothered. no explanation. 💅)

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🔥 ERRORS 🔥

No errors are defined. literally none. we're flawless. ✨

The following sections are informative.

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🌟 EXAMPLES 🌟

None. (not a single one. she's shy. 🙈)

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💜 APPLICATION USAGE 💜

None. (same energy. nothing here. moving on. 🦋)

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🧚 RATIONALE 🧚

okay so if signum is not a valid signal number, some implementations return NULL, while for others the strsignal() function returns a pointer to a string containing an unspecified message denoting an unknown signal. POSIX.1‐2008 leaves this return value unspecified. so like... it depends. iykyk. 🤷

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🌈 FUTURE DIRECTIONS 🌈

None. (the future is bright and also empty here. ⭐)

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👑 SEE ALSO 👑

• psiginfo()
• setlocale()

also the Base Definitions volume of POSIX.1‐2017, <string.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!! this one came to you from IEEE/The Open Group, 2017 — mwah, take care, drink water, and don't modify that returned string 💅🫶✨