[PATCH v4] mingw: check that the file attributes are valid before modifying them

["AreaZR via GitGitGadget" <gitgitgadget@gmail.com>]

From: Seija Kijin <doremylover123@gmail.com>

If the attributes are invalid, return -1
to indicate an error.

Signed-off-by: Seija Kijin <doremylover123@gmail.com>
---
    mingw: check that the file attributes are valid before modifying them
    
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Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-git-1413%2FAreaZR%2Fset-hidden-flag-v4
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-git-1413/AreaZR/set-hidden-flag-v4
Pull-Request: https://github.com/git/git/pull/1413

Range-diff vs v3:

 1:  0cbe8bce617 = 1:  0fed7ade880 mingw: check that the file attributes are valid before modifying them


 compat/mingw.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/compat/mingw.c b/compat/mingw.c
index 63f36c893bf..7f52a4362fe 100644
--- a/compat/mingw.c
+++ b/compat/mingw.c
@@ -446,6 +446,11 @@ static inline int needs_hiding(const char *path)
 static int set_hidden_flag(const wchar_t *path, int set)
 {
 	DWORD original = GetFileAttributesW(path), modified;
+	if (original == INVALID_FILE_ATTRIBUTES) {
+		errno = err_win_to_posix(GetLastError());
+		return -1;
+	}
+
 	if (set)
 		modified = original | FILE_ATTRIBUTE_HIDDEN;
 	else

base-commit: 063bcebf0c917140ca0e705cbe0fdea127e90086
-- 
gitgitgadget