mirror of
https://github.com/torvalds/linux.git
synced 2026-04-18 14:53:58 -04:00
b74be92274
Add support for the GNU extensions 'program_invocation_name' and 'program_invocation_short_name'. These are useful to print error messages, which by convention include the program name. As these are global variables which take up memory even if not used, similar to 'errno', gate them behind NOLIBC_IGNORE_ERRNO. Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> Acked-by: Willy Tarreau <w@1wt.eu> Link: https://patch.msgid.link/20260318-nolibc-err-h-v4-1-08247a694bd9@weissschuh.net
33 lines
855 B
C
33 lines
855 B
C
/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
|
|
/*
|
|
* Minimal errno definitions for NOLIBC
|
|
* Copyright (C) 2017-2022 Willy Tarreau <w@1wt.eu>
|
|
*/
|
|
|
|
/* make sure to include all global symbols */
|
|
#include "nolibc.h"
|
|
|
|
#ifndef _NOLIBC_ERRNO_H
|
|
#define _NOLIBC_ERRNO_H
|
|
|
|
#include <linux/errno.h>
|
|
|
|
#ifndef NOLIBC_IGNORE_ERRNO
|
|
#define SET_ERRNO(v) do { errno = (v); } while (0)
|
|
int errno __attribute__((weak));
|
|
char *program_invocation_name __attribute__((weak)) = "";
|
|
char *program_invocation_short_name __attribute__((weak)) = "";
|
|
#else
|
|
#define SET_ERRNO(v) do { } while (0)
|
|
#define program_invocation_name ""
|
|
#define program_invocation_short_name ""
|
|
#endif
|
|
|
|
|
|
/* errno codes all ensure that they will not conflict with a valid pointer
|
|
* because they all correspond to the highest addressable memory page.
|
|
*/
|
|
#define MAX_ERRNO 4095
|
|
|
|
#endif /* _NOLIBC_ERRNO_H */
|