1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2010-2014 Intel Corporation
3 */
4
5 /* Use XSI-compliant portable version of strerror_r() */
6 #undef _GNU_SOURCE
7 #define _POSIX_C_SOURCE 200809L
8
9 #include <stdio.h>
10 #include <string.h>
11
12 #include <rte_per_lcore.h>
13 #include <rte_errno.h>
14
15 #ifdef RTE_EXEC_ENV_WINDOWS
16 #define strerror_r(errnum, buf, buflen) strerror_s(buf, buflen, errnum)
17 #endif
18
19 RTE_DEFINE_PER_LCORE(int, _rte_errno);
20
21 const char *
rte_strerror(int errnum)22 rte_strerror(int errnum)
23 {
24 /* BSD puts a colon in the "unknown error" messages, Linux doesn't */
25 #ifdef RTE_EXEC_ENV_FREEBSD
26 static const char *sep = ":";
27 #else
28 static const char *sep = "";
29 #endif
30 #define RETVAL_SZ 256
31 static RTE_DEFINE_PER_LCORE(char, retval[RETVAL_SZ]);
32 char *ret = RTE_PER_LCORE(retval);
33
34 /* since some implementations of strerror_r throw an error
35 * themselves if errnum is too big, we handle that case here */
36 if (errnum >= RTE_MAX_ERRNO)
37 #ifdef RTE_EXEC_ENV_WINDOWS
38 snprintf(ret, RETVAL_SZ, "Unknown error");
39 #else
40 snprintf(ret, RETVAL_SZ, "Unknown error%s %d", sep, errnum);
41 #endif
42 else
43 switch (errnum){
44 case E_RTE_SECONDARY:
45 return "Invalid call in secondary process";
46 case E_RTE_NO_CONFIG:
47 return "Missing rte_config structure";
48 default:
49 if (strerror_r(errnum, ret, RETVAL_SZ) != 0)
50 snprintf(ret, RETVAL_SZ, "Unknown error%s %d",
51 sep, errnum);
52 }
53
54 return ret;
55 }
56