// 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" #ifndef ENOTSUPP#define ENOTSUPP	524#endif /* 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;} const char *errstr(int err){	static __thread char buf[12]; 	if (err > 0)		err = -err; 	switch (err) {	case -E2BIG:		return "-E2BIG";	case -EACCES:		return "-EACCES";	case -EADDRINUSE:	return "-EADDRINUSE";	case -EADDRNOTAVAIL:	return "-EADDRNOTAVAIL";	case -EAGAIN:		return "-EAGAIN";	case -EALREADY:		return "-EALREADY";	case -EBADF:		return "-EBADF";	case -EBADFD:		return "-EBADFD";	case -EBUSY:		return "-EBUSY";	case -ECANCELED:	return "-ECANCELED";	case -ECHILD:		return "-ECHILD";	case -EDEADLK:		return "-EDEADLK";	case -EDOM:		return "-EDOM";	case -EEXIST:		return "-EEXIST";	case -EFAULT:		return "-EFAULT";	case -EFBIG:		return "-EFBIG";	case -EILSEQ:		return "-EILSEQ";	case -EINPROGRESS:	return "-EINPROGRESS";	case -EINTR:		return "-EINTR";	case -EINVAL:		return "-EINVAL";	case -EIO:		return "-EIO";	case -EISDIR:		return "-EISDIR";	case -ELOOP:		return "-ELOOP";	case -EMFILE:		return "-EMFILE";	case -EMLINK:		return "-EMLINK";	case -EMSGSIZE:		return "-EMSGSIZE";	case -ENAMETOOLONG:	return "-ENAMETOOLONG";	case -ENFILE:		return "-ENFILE";	case -ENODATA:		return "-ENODATA";	case -ENODEV:		return "-ENODEV";	case -ENOENT:		return "-ENOENT";	case -ENOEXEC:		return "-ENOEXEC";	case -ENOLINK:		return "-ENOLINK";	case -ENOMEM:		return "-ENOMEM";	case -ENOSPC:		return "-ENOSPC";	case -ENOTBLK:		return "-ENOTBLK";	case -ENOTDIR:		return "-ENOTDIR";	case -ENOTSUPP:		return "-ENOTSUPP";	case -ENOTTY:		return "-ENOTTY";	case -ENXIO:		return "-ENXIO";	case -EOPNOTSUPP:	return "-EOPNOTSUPP";	case -EOVERFLOW:	return "-EOVERFLOW";	case -EPERM:		return "-EPERM";	case -EPIPE:		return "-EPIPE";	case -EPROTO:		return "-EPROTO";	case -EPROTONOSUPPORT:	return "-EPROTONOSUPPORT";	case -ERANGE:		return "-ERANGE";	case -EROFS:		return "-EROFS";	case -ESPIPE:		return "-ESPIPE";	case -ESRCH:		return "-ESRCH";	case -ETXTBSY:		return "-ETXTBSY";	case -EUCLEAN:		return "-EUCLEAN";	case -EXDEV:		return "-EXDEV";	default:		snprintf(buf, sizeof(buf), "%d", err);		return buf;	}}