Piotr Caban : msvcrt: Fix errno set on write to read-only file.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 7f5f904cfa7e062012960283e98229806c3b27c9
URL:    https://gitlab.winehq.org/wine/wine/-/commit/7f5f904cfa7e062012960283e982298...

Author: Piotr Caban 
Date:   Wed Nov  2 11:08:02 2022 +0100

msvcrt: Fix errno set on write to read-only file.

---

dlls/msvcrt/file.c       | 4 ++++
 dlls/msvcrt/tests/file.c | 6 ++++++
 2 files changed, 10 insertions(+)

diff --git a/dlls/msvcrt/file.c b/dlls/msvcrt/file.c
index 81416deed5a..affa2fbdd43 100644
--- a/dlls/msvcrt/file.c
+++ b/dlls/msvcrt/file.c
@@ -3590,6 +3590,8 @@ int CDECL _write(int fd, const void* buf, unsigned int count)
             TRACE("WriteFile (fd %d, hand %p) failed-last error (%ld)\n", fd,
                     hand, GetLastError());
             msvcrt_set_errno(GetLastError());
+            if (GetLastError() == ERROR_ACCESS_DENIED)
+                *_errno() = EBADF;
             num_written = -1;
         }

@@ -3718,6 +3720,8 @@ int CDECL _write(int fd, const void* buf, unsigned int count)
             TRACE("WriteFile/WriteConsoleW (fd %d, hand %p) failed-last error (%ld)\n", fd,
                     hand, GetLastError());
             msvcrt_set_errno(GetLastError());
+            if (GetLastError() == ERROR_ACCESS_DENIED)
+                *_errno() = EBADF;
             release_ioinfo(info);
             return -1;
         }
diff --git a/dlls/msvcrt/tests/file.c b/dlls/msvcrt/tests/file.c
index 91b057ea72e..7a5466968b5 100644
--- a/dlls/msvcrt/tests/file.c
+++ b/dlls/msvcrt/tests/file.c
@@ -311,6 +311,12 @@ static void test_readmode( BOOL ascii_mode )
     ok(l == pl+fp,"line 2 ftell got %ld should be %d in %s\n", l, pl+fp, IOMODE);
     ok(lstrlenA(buffer) == 2+ao,"line 2 fgets got size %d should be %d in %s\n",
      lstrlenA(buffer), 2+ao, IOMODE);
+
+    errno = 0xdeadbeef;
+    _doserrno = 0xdeadbeef;
+    ok(write(fd, buffer, 1) == -1, "read succeeded on write-only file\n");
+    ok(errno == EBADF, "errno = %d\n", errno);
+    ok(_doserrno == ERROR_ACCESS_DENIED, "doserrno = %ld\n", _doserrno);

/* test fread across buffer boundary */
     rewind(file);