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 */
15char *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}

  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 <errno.h>
  6#include "str_error.h"
  7
  8#ifndef ENOTSUPP
  9#define ENOTSUPP	524
 10#endif
 11
 12/* make sure libbpf doesn't use kernel-only integer typedefs */
 13#pragma GCC poison u8 u16 u32 u64 s8 s16 s32 s64
 14
 15/*
 16 * Wrapper to allow for building in non-GNU systems such as Alpine Linux's musl
 17 * libc, while checking strerror_r() return to avoid having to check this in
 18 * all places calling it.
 19 */
 20char *libbpf_strerror_r(int err, char *dst, int len)
 21{
 22	int ret = strerror_r(err < 0 ? -err : err, dst, len);
 23	/* on glibc <2.13, ret == -1 and errno is set, if strerror_r() can't
 24	 * handle the error, on glibc >=2.13 *positive* (errno-like) error
 25	 * code is returned directly
 26	 */
 27	if (ret == -1)
 28		ret = errno;
 29	if (ret) {
 30		if (ret == EINVAL)
 31			/* strerror_r() doesn't recognize this specific error */
 32			snprintf(dst, len, "unknown error (%d)", err < 0 ? err : -err);
 33		else
 34			snprintf(dst, len, "ERROR: strerror_r(%d)=%d", err, ret);
 35	}
 36	return dst;
 37}
 38
 39const char *errstr(int err)
 40{
 41	static __thread char buf[12];
 42
 43	if (err > 0)
 44		err = -err;
 45
 46	switch (err) {
 47	case -E2BIG:		return "-E2BIG";
 48	case -EACCES:		return "-EACCES";
 49	case -EADDRINUSE:	return "-EADDRINUSE";
 50	case -EADDRNOTAVAIL:	return "-EADDRNOTAVAIL";
 51	case -EAGAIN:		return "-EAGAIN";
 52	case -EALREADY:		return "-EALREADY";
 53	case -EBADF:		return "-EBADF";
 54	case -EBADFD:		return "-EBADFD";
 55	case -EBUSY:		return "-EBUSY";
 56	case -ECANCELED:	return "-ECANCELED";
 57	case -ECHILD:		return "-ECHILD";
 58	case -EDEADLK:		return "-EDEADLK";
 59	case -EDOM:		return "-EDOM";
 60	case -EEXIST:		return "-EEXIST";
 61	case -EFAULT:		return "-EFAULT";
 62	case -EFBIG:		return "-EFBIG";
 63	case -EILSEQ:		return "-EILSEQ";
 64	case -EINPROGRESS:	return "-EINPROGRESS";
 65	case -EINTR:		return "-EINTR";
 66	case -EINVAL:		return "-EINVAL";
 67	case -EIO:		return "-EIO";
 68	case -EISDIR:		return "-EISDIR";
 69	case -ELOOP:		return "-ELOOP";
 70	case -EMFILE:		return "-EMFILE";
 71	case -EMLINK:		return "-EMLINK";
 72	case -EMSGSIZE:		return "-EMSGSIZE";
 73	case -ENAMETOOLONG:	return "-ENAMETOOLONG";
 74	case -ENFILE:		return "-ENFILE";
 75	case -ENODATA:		return "-ENODATA";
 76	case -ENODEV:		return "-ENODEV";
 77	case -ENOENT:		return "-ENOENT";
 78	case -ENOEXEC:		return "-ENOEXEC";
 79	case -ENOLINK:		return "-ENOLINK";
 80	case -ENOMEM:		return "-ENOMEM";
 81	case -ENOSPC:		return "-ENOSPC";
 82	case -ENOTBLK:		return "-ENOTBLK";
 83	case -ENOTDIR:		return "-ENOTDIR";
 84	case -ENOTSUPP:		return "-ENOTSUPP";
 85	case -ENOTTY:		return "-ENOTTY";
 86	case -ENXIO:		return "-ENXIO";
 87	case -EOPNOTSUPP:	return "-EOPNOTSUPP";
 88	case -EOVERFLOW:	return "-EOVERFLOW";
 89	case -EPERM:		return "-EPERM";
 90	case -EPIPE:		return "-EPIPE";
 91	case -EPROTO:		return "-EPROTO";
 92	case -EPROTONOSUPPORT:	return "-EPROTONOSUPPORT";
 93	case -ERANGE:		return "-ERANGE";
 94	case -EROFS:		return "-EROFS";
 95	case -ESPIPE:		return "-ESPIPE";
 96	case -ESRCH:		return "-ESRCH";
 97	case -ETXTBSY:		return "-ETXTBSY";
 98	case -EUCLEAN:		return "-EUCLEAN";
 99	case -EXDEV:		return "-EXDEV";
100	default:
101		snprintf(buf, sizeof(buf), "%d", err);
102		return buf;
103	}
104}