[PATCH v2] selftests/net/socket.c: removed warnings from unused returns

[Alex Tran <alex.t.tran@gmail.com>]

socket.c: In function ‘run_tests’:
socket.c:59:25: warning: ignoring return value of ‘strerror_r’ \
declared with attribute ‘warn_unused_result’ [-Wunused-result]
59 | strerror_r(-s->expect, err_string1, ERR_STRING_SZ);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

socket.c:60:25: warning: ignoring return value of ‘strerror_r’ \
declared with attribute ‘warn_unused_result’ [-Wunused-result]
60 | strerror_r(errno, err_string2, ERR_STRING_SZ);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

socket.c:73:33: warning: ignoring return value of ‘strerror_r’ \
declared with attribute ‘warn_unused_result’ [-Wunused-result]
73 | strerror_r(errno, err_string1, ERR_STRING_SZ);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

changelog:
v2 
- const char* messages and fixed patch warnings of max 75 chars 
  per line

Signed-off-by: Alex Tran <alex.t.tran@gmail.com>
---
 tools/testing/selftests/net/socket.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/tools/testing/selftests/net/socket.c b/tools/testing/selftests/net/socket.c
index db1aeb8c5d1e..be1080003c61 100644
--- a/tools/testing/selftests/net/socket.c
+++ b/tools/testing/selftests/net/socket.c
@@ -39,6 +39,7 @@ static int run_tests(void)
 {
 	char err_string1[ERR_STRING_SZ];
 	char err_string2[ERR_STRING_SZ];
+	const char *msg1, *msg2;
 	int i, err;
 
 	err = 0;
@@ -56,13 +57,13 @@ static int run_tests(void)
 			    errno == -s->expect)
 				continue;
 
-			strerror_r(-s->expect, err_string1, ERR_STRING_SZ);
-			strerror_r(errno, err_string2, ERR_STRING_SZ);
+			msg1 = strerror_r(-s->expect, err_string1, ERR_STRING_SZ);
+			msg2 = strerror_r(errno, err_string2, ERR_STRING_SZ);
 
 			fprintf(stderr, "socket(%d, %d, %d) expected "
 				"err (%s) got (%s)\n",
 				s->domain, s->type, s->protocol,
-				err_string1, err_string2);
+				msg1, msg2);
 
 			err = -1;
 			break;
@@ -70,12 +71,12 @@ static int run_tests(void)
 			close(fd);
 
 			if (s->expect < 0) {
-				strerror_r(errno, err_string1, ERR_STRING_SZ);
+				msg1 = strerror_r(errno, err_string1, ERR_STRING_SZ);
 
 				fprintf(stderr, "socket(%d, %d, %d) expected "
 					"success got err (%s)\n",
 					s->domain, s->type, s->protocol,
-					err_string1);
+					msg1);
 
 				err = -1;
 				break;
-- 
2.34.1