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ladybird/Userland/Libraries/LibC/errno.h

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Meta: Add license header to source files As suggested by Joshua, this commit adds the 2-clause BSD license as a comment block to the top of every source file. For the first pass, I've just added myself for simplicity. I encourage everyone to add themselves as copyright holders of any file they've added or modified in some significant way. If I've added myself in error somewhere, feel free to replace it with the appropriate copyright holder instead. Going forward, all new source files should include a license header.
2020-01-18 09:38:21 +01:00
/*
LibC: Implement errno via a __errno_location() function This matches how some other systems implement errno, and makes 3rd party software that expect us to have __errno_location() work.
2022-04-21 11:09:05 +02:00
* Copyright (c) 2018-2022, Andreas Kling <kling@serenityos.org>
Meta: Add license header to source files As suggested by Joshua, this commit adds the 2-clause BSD license as a comment block to the top of every source file. For the first pass, I've just added myself for simplicity. I encourage everyone to add themselves as copyright holders of any file they've added or modified in some significant way. If I've added myself in error somewhere, feel free to replace it with the appropriate copyright holder instead. Going forward, all new source files should include a license header.
2020-01-18 09:38:21 +01:00
*
Everything: Move to SPDX license identifiers in all files. SPDX License Identifiers are a more compact / standardized way of representing file license information. See: https://spdx.dev/resources/use/#identifiers This was done with the `ambr` search and replace tool. ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
2021-04-22 01:24:48 -07:00
* SPDX-License-Identifier: BSD-2-Clause
Meta: Add license header to source files As suggested by Joshua, this commit adds the 2-clause BSD license as a comment block to the top of every source file. For the first pass, I've just added myself for simplicity. I encourage everyone to add themselves as copyright holders of any file they've added or modified in some significant way. If I've added myself in error somewhere, feel free to replace it with the appropriate copyright holder instead. Going forward, all new source files should include a license header.
2020-01-18 09:38:21 +01:00
*/
Implement errno in LibC. This also meant I had to implement BSS (SHT_NOBITS) sections in ELFLoader. I also added an strerror() so we can print out what the errors are.
2018-10-25 12:06:00 +02:00
#pragma once
Kernel+LibC: Move errno definitions to Kernel/API/POSIX This fixes at least half of our LibC includes in the kernel. The source of truth for errno codes and their description strings now lives in Kernel/API/POSIX/errno.h as an enumeration, which LibC includes.
2021-09-12 11:29:28 +00:00
#include <errno_codes.h>
Add clang-format file Also run it across the whole tree to get everything using the One True Style. We don't yet run this in an automated fashion as it's a little slow, but there is a snippet to do so in makeall.sh.
2019-05-28 11:53:16 +02:00
#include <sys/cdefs.h>
Implement errno in LibC. This also meant I had to implement BSS (SHT_NOBITS) sections in ELFLoader. I also added an strerror() so we can print out what the errors are.
2018-10-25 12:06:00 +02:00
#define __RETURN_WITH_ERRNO(rc, good_ret, bad_ret) \
Add clang-format file Also run it across the whole tree to get everything using the One True Style. We don't yet run this in an automated fashion as it's a little slow, but there is a snippet to do so in makeall.sh.
2019-05-28 11:53:16 +02:00
do { \
if (rc < 0) { \
errno = -rc; \
return (bad_ret); \
} \
LibC: Fix clang-tidy warning about else-after-return in errno handling
2019-08-15 20:25:27 +02:00
return (good_ret); \
Add clang-format file Also run it across the whole tree to get everything using the One True Style. We don't yet run this in an automated fashion as it's a little slow, but there is a snippet to do so in makeall.sh.
2019-05-28 11:53:16 +02:00
} while (0)
Implement errno in LibC. This also meant I had to implement BSS (SHT_NOBITS) sections in ELFLoader. I also added an strerror() so we can print out what the errors are.
2018-10-25 12:06:00 +02:00
A bunch of LibC boilerplate stuff added while trying to get figlet to build.
2018-10-31 02:09:11 +01:00
__BEGIN_DECLS
Implement errno in LibC. This also meant I had to implement BSS (SHT_NOBITS) sections in ELFLoader. I also added an strerror() so we can print out what the errors are.
2018-10-25 12:06:00 +02:00
Everywhere: Run clang-format
2022-04-01 20:58:27 +03:00
extern char const* const sys_errlist[];
Add sys_nerr and sys_errlist. Also keep the canonical errno list in LibC for now. The kernel gets it from there. This makes building 3rd party code easier. ..also fix broken strchr().
2018-11-06 14:13:16 +01:00
extern int sys_nerr;
LibC: Add NO_TLS preprocessor flag When this flag is defined, LibC does not use TLS. It will be useful for the dynamic loader.
2020-10-10 17:48:27 +03:00
#ifdef NO_TLS
extern int errno;
#else
LibC: Make "errno" thread-specific Now that the kernel supports thread-local storage, we can declare errno with the __thread keyword, which causes it to be per-thread. This should fix all the stupid issues that happen when many threads use the same errno. :^)
2019-09-07 15:55:41 +02:00
extern __thread int errno;
LibC: Add NO_TLS preprocessor flag When this flag is defined, LibC does not use TLS. It will be useful for the dynamic loader.
2020-10-10 17:48:27 +03:00
#endif
Implement errno in LibC. This also meant I had to implement BSS (SHT_NOBITS) sections in ELFLoader. I also added an strerror() so we can print out what the errors are.
2018-10-25 12:06:00 +02:00
LibC: Implement errno via a __errno_location() function This matches how some other systems implement errno, and makes 3rd party software that expect us to have __errno_location() work.
2022-04-21 11:09:05 +02:00
int* __errno_location() __attribute__((const));
#define errno (*__errno_location())
LibC: #define errno errno This makes the binutils port build again, after the TLS changes.
2019-09-08 14:20:13 +02:00
A bunch of LibC boilerplate stuff added while trying to get figlet to build.
2018-10-31 02:09:11 +01:00
__END_DECLS
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