11bc38b8fSAlexei Starovoitov // SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) 26d41907cSArnaldo Carvalho de Melo #undef _GNU_SOURCE 36d41907cSArnaldo Carvalho de Melo #include <string.h> 46d41907cSArnaldo Carvalho de Melo #include <stdio.h> 5*548c2edeSAndrii Nakryiko #include <errno.h> 66d41907cSArnaldo Carvalho de Melo #include "str_error.h" 76d41907cSArnaldo Carvalho de Melo 81d1a3bcfSAndrii Nakryiko /* make sure libbpf doesn't use kernel-only integer typedefs */ 91d1a3bcfSAndrii Nakryiko #pragma GCC poison u8 u16 u32 u64 s8 s16 s32 s64 101d1a3bcfSAndrii Nakryiko 116d41907cSArnaldo Carvalho de Melo /* 126d41907cSArnaldo Carvalho de Melo * Wrapper to allow for building in non-GNU systems such as Alpine Linux's musl 136d41907cSArnaldo Carvalho de Melo * libc, while checking strerror_r() return to avoid having to check this in 146d41907cSArnaldo Carvalho de Melo * all places calling it. 156d41907cSArnaldo Carvalho de Melo */ 1624d6a808SAndrey Ignatov char *libbpf_strerror_r(int err, char *dst, int len) 176d41907cSArnaldo Carvalho de Melo { 18d66f4366SAndrii Nakryiko int ret = strerror_r(err < 0 ? -err : err, dst, len); 19*548c2edeSAndrii Nakryiko /* on glibc <2.13, ret == -1 and errno is set, if strerror_r() can't 20*548c2edeSAndrii Nakryiko * handle the error, on glibc >=2.13 *positive* (errno-like) error 21*548c2edeSAndrii Nakryiko * code is returned directly 22*548c2edeSAndrii Nakryiko */ 23*548c2edeSAndrii Nakryiko if (ret == -1) 24*548c2edeSAndrii Nakryiko ret = errno; 25*548c2edeSAndrii Nakryiko if (ret) { 26*548c2edeSAndrii Nakryiko if (ret == EINVAL) 27*548c2edeSAndrii Nakryiko /* strerror_r() doesn't recognize this specific error */ 28*548c2edeSAndrii Nakryiko snprintf(dst, len, "unknown error (%d)", err < 0 ? err : -err); 29*548c2edeSAndrii Nakryiko else 306d41907cSArnaldo Carvalho de Melo snprintf(dst, len, "ERROR: strerror_r(%d)=%d", err, ret); 31*548c2edeSAndrii Nakryiko } 326d41907cSArnaldo Carvalho de Melo return dst; 336d41907cSArnaldo Carvalho de Melo } 34