tools/lib/bpf/str_error.c

   1 // SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
   2 #undef _GNU_SOURCE
   3 #include <string.h>
   4 #include <stdio.h>
   5 #include "str_error.h"
   6
   7 /* make sure libbpf doesn't use kernel-only integer typedefs */
   8 #pragma GCC poison u8 u16 u32 u64 s8 s16 s32 s64
   9
  10 /*
  11  * Wrapper to allow for building in non-GNU systems such as Alpine Linux's musl
  12  * libc, while checking strerror_r() return to avoid having to check this in
  13  * all places calling it.
  14  */
  15 char *libbpf_strerror_r(int err, char *dst, int len)
  16 {
  17         int ret = strerror_r(err < 0 ? -err : err, dst, len);
  18         if (ret)
  19                 snprintf(dst, len, "ERROR: strerror_r(%d)=%d", err, ret);
  20         return dst;
  21 }