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diff --git a/app/test/test_errno.c b/app/test/test_errno.c
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+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2010-2012 Intel Corporation. All rights reserved.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * version: DPDK.L.1.2.3-3
+ */
+
+#include <stdint.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <errno.h>
+#include <string.h>
+#include <rte_per_lcore.h>
+#include <rte_errno.h>
+#include <rte_string_fns.h>
+
+#include <cmdline_parse.h>
+
+#include "test.h"
+
+int
+test_errno(void)
+{
+ const char *rte_retval;
+ const char *libc_retval;
+ const char unknown_code_result[] = "Unknown error %d";
+ char expected_libc_retval[sizeof(unknown_code_result)+3];
+
+ /* use a small selection of standard errors for testing */
+ int std_errs[] = {EAGAIN, EBADF, EACCES, EINTR, EINVAL};
+ /* test ALL registered RTE error codes for overlap */
+ int rte_errs[] = {E_RTE_SECONDARY, E_RTE_NO_CONFIG, E_RTE_NO_TAILQ};
+ unsigned i;
+
+ rte_errno = 0;
+ if (rte_errno != 0)
+ return -1;
+ /* check for standard errors we return the same as libc */
+ for (i = 0; i < sizeof(std_errs)/sizeof(std_errs[0]); i++){
+ rte_retval = rte_strerror(std_errs[i]);
+ libc_retval = strerror(std_errs[i]);
+ printf("rte_strerror: '%s', strerror: '%s'\n",
+ rte_retval, libc_retval);
+ if (strcmp(rte_retval, libc_retval) != 0)
+ return -1;
+ }
+ /* for rte-specific errors ensure we return a different string
+ * and that the string for libc is for an unknown error
+ */
+ for (i = 0; i < sizeof(rte_errs)/sizeof(rte_errs[0]); i++){
+ rte_retval = rte_strerror(rte_errs[i]);
+ libc_retval = strerror(rte_errs[i]);
+ printf("rte_strerror: '%s', strerror: '%s'\n",
+ rte_retval, libc_retval);
+ if (strcmp(rte_retval, libc_retval) == 0)
+ return -1;
+ /* generate appropriate error string for unknown error number
+ * and then check that this is what we got back. If not, we have
+ * a duplicate error number that conflicts with errno.h */
+ rte_snprintf(expected_libc_retval, sizeof(expected_libc_retval),
+ unknown_code_result, rte_errs[i]);
+ if (strcmp(expected_libc_retval, libc_retval) != 0){
+ printf("Error, duplicate error code %d\n", rte_errs[i]);
+ return -1;
+ }
+ }
+
+ /* ensure that beyond RTE_MAX_ERRNO, we always get an unknown code */
+ rte_retval = rte_strerror(RTE_MAX_ERRNO + 1);
+ libc_retval = strerror(RTE_MAX_ERRNO + 1);
+ rte_snprintf(expected_libc_retval, sizeof(expected_libc_retval),
+ unknown_code_result, RTE_MAX_ERRNO + 1);
+ printf("rte_strerror: '%s', strerror: '%s'\n",
+ rte_retval, libc_retval);
+ if ((strcmp(rte_retval, libc_retval) != 0) ||
+ (strcmp(expected_libc_retval, libc_retval) != 0)){
+ printf("Failed test for RTE_MAX_ERRNO + 1 value\n");
+ return -1;
+ }
+
+ return 0;
+}