u-boot/include/errno.h
Heinrich Schuchardt f279e1d916 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>
2019-10-31 07:22:53 -04:00

32 lines
700 B
C

/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (C) 2014 Samsung Electronics
* Przemyslaw Marczak <p.marczak@samsung.com>
*/
#ifndef _ERRNO_H
#define _ERRNO_H
#include <linux/errno.h>
extern int errno;
#define __set_errno(val) do { errno = val; } while (0)
/**
* 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.
*/
#ifdef CONFIG_ERRNO_STR
const char *errno_str(int errno);
#else
static const char error_message[] = "";
static inline const char *errno_str(int errno)
{
return error_message;
}
#endif
#endif /* _ERRNO_H */