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u-boot/include/errno.h

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SPDX: Convert all of our single license tags to Linux Kernel style When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 05:58:06 +08:00
/* SPDX-License-Identifier: GPL-2.0+ */
errno: Add copyright header and header guard Bring in a copyright for this file from cmd/pmic.c since this file was submitted by the same author at around the same time. Also fix the missing header guard. Signed-off-by: Simon Glass <sjg@chromium.org> Signed-off-by: Tom Warren <twarren@nvidia.com>
2016-05-09 06:55:17 +08:00
/*
* Copyright (C) 2014 Samsung Electronics
* Przemyslaw Marczak <p.marczak@samsung.com>
*/
Add basic errno support. Needed for hash table support; probably useful in a lot of other places as well. Signed-off-by: Wolfgang Denk <wd@denx.de>
2010-06-12 06:19:46 +08:00
#ifndef _ERRNO_H
errno: Add copyright header and header guard Bring in a copyright for this file from cmd/pmic.c since this file was submitted by the same author at around the same time. Also fix the missing header guard. Signed-off-by: Simon Glass <sjg@chromium.org> Signed-off-by: Tom Warren <twarren@nvidia.com>
2016-05-09 06:55:17 +08:00
#define _ERRNO_H
Add basic errno support. Needed for hash table support; probably useful in a lot of other places as well. Signed-off-by: Wolfgang Denk <wd@denx.de>
2010-06-12 06:19:46 +08:00
treewide: replace #include <asm-generic/errno.h> with <linux/errno.h> Now, include/linux/errno.h is a wrapper of <asm-generic/errno.h>. Replace all include directives for <asm-generic/errno.h> with <linux/errno.h>. <asm-generic/...> is supposed to be included from <asm/...> when arch-headers fall back into generic implementation. Generally, they should not be directly included from .c files. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> [trini: Add drivers/usb/host/xhci-rockchip.c] Signed-off-by: Tom Rini <trini@konsulko.com>
2016-09-21 10:28:57 +08:00
#include <linux/errno.h>
Add basic errno support. Needed for hash table support; probably useful in a lot of other places as well. Signed-off-by: Wolfgang Denk <wd@denx.de>
2010-06-12 06:19:46 +08:00
extern int errno;
#define __set_errno(val) do { errno = val; } while (0)
lib: errno: avoid error format-overflow In cmd/regulator.c an error occurs with GCC 9.2.1 if CONFIG_ERRNO_STR is not defined: cmd/regulator.c: In function ‘failure’: cmd/regulator.c:20:2: error: ‘%s’ directive argument is null [-Werror=format-overflow=] 20 | printf("Error: %d (%s)\n", ret, errno_str(ret)); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In function ‘constraint’, inlined from ‘constraint’ at cmd/regulator.c:111:12: cmd/regulator.c:115:3: error: ‘%s’ directive argument is null [-Werror=format-overflow=] 115 | printf(" %s (err: %d)\n", errno_str(val), val); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ errno_str() should return a valid string instead of NULL if CONFIG_ERRNO_STR is not defined. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2019-10-06 19:58:57 +08:00
/**
* errno_str() - get description for error number
*
* @errno: error number (negative in case of error)
* Return: string describing the error. If CONFIG_ERRNO_STR is not
* defined an empty string is returned.
*/
lib: errno: introduce errno_str(): returns errno related message The functions error's numbers are standarized - but the error messages are not. The errors are often handled with unclear error messages, so why not use an errno standarized messages. Advantages: - This could decrease the binary size. - Appended with a detailed information, the error message will be clear. This commit introduces new function: - const char *errno_to_str(int errno) The functions returns a pointer to the errno corresponding text message: - if errno is null or positive number - a pointer to "Success" message - if errno is negative - a pointer to errno related message Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com> Reviewed-by: Tom Rini <trini@ti.com>
2014-10-09 04:48:37 +08:00
#ifdef CONFIG_ERRNO_STR
const char *errno_str(int errno);
errno: Allow errno_str() to be used without CONFIG_ERRNO_STR The pmic framework uses errno_str() and this requires board that use it to enable CONFIG_ERRNO_STR to avoid a build error. Update the header to provide a NULL error message when CONFIG_ERRNO_STR is not defined, and fix the build error. This will show as "(null)" when U-Boot prints it. Signed-off-by: Simon Glass <sjg@chromium.org> Signed-off-by: Tom Warren <twarren@nvidia.com>
2016-05-09 06:55:18 +08:00
#else
lib: errno: avoid error format-overflow In cmd/regulator.c an error occurs with GCC 9.2.1 if CONFIG_ERRNO_STR is not defined: cmd/regulator.c: In function ‘failure’: cmd/regulator.c:20:2: error: ‘%s’ directive argument is null [-Werror=format-overflow=] 20 | printf("Error: %d (%s)\n", ret, errno_str(ret)); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In function ‘constraint’, inlined from ‘constraint’ at cmd/regulator.c:111:12: cmd/regulator.c:115:3: error: ‘%s’ directive argument is null [-Werror=format-overflow=] 115 | printf(" %s (err: %d)\n", errno_str(val), val); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ errno_str() should return a valid string instead of NULL if CONFIG_ERRNO_STR is not defined. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2019-10-06 19:58:57 +08:00
static const char error_message[] = "";
errno: Allow errno_str() to be used without CONFIG_ERRNO_STR The pmic framework uses errno_str() and this requires board that use it to enable CONFIG_ERRNO_STR to avoid a build error. Update the header to provide a NULL error message when CONFIG_ERRNO_STR is not defined, and fix the build error. This will show as "(null)" when U-Boot prints it. Signed-off-by: Simon Glass <sjg@chromium.org> Signed-off-by: Tom Warren <twarren@nvidia.com>
2016-05-09 06:55:18 +08:00
static inline const char *errno_str(int errno)
{
lib: errno: avoid error format-overflow In cmd/regulator.c an error occurs with GCC 9.2.1 if CONFIG_ERRNO_STR is not defined: cmd/regulator.c: In function ‘failure’: cmd/regulator.c:20:2: error: ‘%s’ directive argument is null [-Werror=format-overflow=] 20 | printf("Error: %d (%s)\n", ret, errno_str(ret)); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In function ‘constraint’, inlined from ‘constraint’ at cmd/regulator.c:111:12: cmd/regulator.c:115:3: error: ‘%s’ directive argument is null [-Werror=format-overflow=] 115 | printf(" %s (err: %d)\n", errno_str(val), val); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ errno_str() should return a valid string instead of NULL if CONFIG_ERRNO_STR is not defined. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2019-10-06 19:58:57 +08:00
return error_message;
errno: Allow errno_str() to be used without CONFIG_ERRNO_STR The pmic framework uses errno_str() and this requires board that use it to enable CONFIG_ERRNO_STR to avoid a build error. Update the header to provide a NULL error message when CONFIG_ERRNO_STR is not defined, and fix the build error. This will show as "(null)" when U-Boot prints it. Signed-off-by: Simon Glass <sjg@chromium.org> Signed-off-by: Tom Warren <twarren@nvidia.com>
2016-05-09 06:55:18 +08:00
}
lib: errno: introduce errno_str(): returns errno related message The functions error's numbers are standarized - but the error messages are not. The errors are often handled with unclear error messages, so why not use an errno standarized messages. Advantages: - This could decrease the binary size. - Appended with a detailed information, the error message will be clear. This commit introduces new function: - const char *errno_to_str(int errno) The functions returns a pointer to the errno corresponding text message: - if errno is null or positive number - a pointer to "Success" message - if errno is negative - a pointer to errno related message Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com> Reviewed-by: Tom Rini <trini@ti.com>
2014-10-09 04:48:37 +08:00
#endif
Add basic errno support. Needed for hash table support; probably useful in a lot of other places as well. Signed-off-by: Wolfgang Denk <wd@denx.de>
2010-06-12 06:19:46 +08:00
#endif /* _ERRNO_H */
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