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// SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
#undef _GNU_SOURCE
#include <string.h>
#include <stdio.h>
#include <errno.h>
#include "str_error.h"
/* make sure libbpf doesn't use kernel-only integer typedefs */
#pragma GCC poison u8 u16 u32 u64 s8 s16 s32 s64
/*
* Wrapper to allow for building in non-GNU systems such as Alpine Linux's musl
* libc, while checking strerror_r() return to avoid having to check this in
* all places calling it.
*/
char *libbpf_strerror_r(int err, char *dst, int len)
{
int ret = strerror_r(err < 0 ? -err : err, dst, len);
/* on glibc <2.13, ret == -1 and errno is set, if strerror_r() can't
* handle the error, on glibc >=2.13 *positive* (errno-like) error
* code is returned directly
*/
if (ret == -1)
ret = errno;
if (ret) {
if (ret == EINVAL)
/* strerror_r() doesn't recognize this specific error */
snprintf(dst, len, "unknown error (%d)", err < 0 ? err : -err);
else
snprintf(dst, len, "ERROR: strerror_r(%d)=%d", err, ret);
}
return dst;
}
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