| // 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; | |
| } |