strerror: Preserve Windows error code in some functions

This is a follow-up to af02162 which removed (SET_)ERRNO macros. That
commit was an earlier draft that I committed by mistake, which was then
remedied by a5834e5 and e909de6, and now this commit. With this commit
there is now no difference between the current code and the changes that
were approved in the final draft.

Thanks-to: Max Dymond, Marcel Raad, Daniel Stenberg, Gisle Vanem
Ref: https://github.com/curl/curl/pull/1589

1 files changed, 2 insertions, 5 deletions

diff --git a/tests/libtest/lib541.c b/tests/libtest/lib541.c
index 9aa4a0826..94a26a4b7 100644
--- a/tests/libtest/lib541.c
+++ b/tests/libtest/lib541.c
@@ -38,7 +38,6 @@ int test(char *URL)
   FILE *hd_src;
   int hd;
   struct_stat file_info;
-  int error;
 
   if(!libtest_arg2) {
     fprintf(stderr, "Usage: <url> <file-to-upload>\n");
@@ -47,9 +46,8 @@ int test(char *URL)
 
   hd_src = fopen(libtest_arg2, "rb");
   if(NULL == hd_src) {
-    error = errno;
     fprintf(stderr, "fopen failed with error: %d %s\n",
-            error, strerror(error));
+            errno, strerror(errno));
     fprintf(stderr, "Error opening file: %s\n", libtest_arg2);
     return -2; /* if this happens things are major weird */
   }
@@ -58,9 +56,8 @@ int test(char *URL)
   hd = fstat(fileno(hd_src), &file_info);
   if(hd == -1) {
     /* can't open file, bail out */
-    error = errno;
     fprintf(stderr, "fstat() failed with error: %d %s\n",
-            error, strerror(error));
+            errno, strerror(errno));
     fprintf(stderr, "ERROR: cannot open file %s\n", libtest_arg2);
     fclose(hd_src);
     return TEST_ERR_MAJOR_BAD;