[PATCH 1/1] Replace SID with domain/username

["Sören Krecker" <soekkle@freenet.de>]

From: soekkle <soekkle@freenet.de>

Replace SID with domain/username in erromessage, if owner of repository
and user are not equal on windows systems.

Signed-off-by: Sören Krecker <soekkle@freenet.de>
---
 compat/mingw.c | 27 +++++++++++++++++++++++----
 1 file changed, 23 insertions(+), 4 deletions(-)

diff --git a/compat/mingw.c b/compat/mingw.c
index 42053c1f65..7318f0e20e 100644
--- a/compat/mingw.c
+++ b/compat/mingw.c
@@ -2684,6 +2684,25 @@ static PSID get_current_user_sid(void)
 	return result;
 }
 
+BOOL user_sid_to_string(PSID sid, LPSTR* str)
+{
+	SID_NAME_USE peUse;
+	DWORD lenName = { 0 }, lenDomain = { 0 };
+	LookupAccountSidA(NULL, sid, NULL, &lenName, NULL,
+					&lenDomain, &peUse); // returns only FALSE, because the string pointers are NULL
+	ALLOC_ARRAY((*str), (size_t)lenDomain + (size_t)lenName); // Alloc neded Space of the strings
+	BOOL retVal = LookupAccountSidA(NULL, sid, (*str) + lenDomain, &lenName,
+				       *str,
+					&lenDomain, &peUse);
+	*(*str + lenDomain) = '/';
+	if (retVal == FALSE)
+	{
+		free(*str);
+		*str = NULL;
+	}
+	return retVal;
+}
+
 static int acls_supported(const char *path)
 {
 	size_t offset = offset_1st_component(path);
@@ -2767,7 +2786,7 @@ int is_path_owned_by_current_sid(const char *path, struct strbuf *report)
 		} else if (report) {
 			LPSTR str1, str2, to_free1 = NULL, to_free2 = NULL;
 
-			if (ConvertSidToStringSidA(sid, &str1))
+			if (user_sid_to_string(sid, &str1))
 				to_free1 = str1;
 			else
 				str1 = "(inconvertible)";
@@ -2776,7 +2795,7 @@ int is_path_owned_by_current_sid(const char *path, struct strbuf *report)
 				str2 = "(none)";
 			else if (!IsValidSid(current_user_sid))
 				str2 = "(invalid)";
-			else if (ConvertSidToStringSidA(current_user_sid, &str2))
+			else if (user_sid_to_string(current_user_sid, &str2))
 				to_free2 = str2;
 			else
 				str2 = "(inconvertible)";
@@ -2784,8 +2803,8 @@ int is_path_owned_by_current_sid(const char *path, struct strbuf *report)
 				    "'%s' is owned by:\n"
 				    "\t'%s'\nbut the current user is:\n"
 				    "\t'%s'\n", path, str1, str2);
-			LocalFree(to_free1);
-			LocalFree(to_free2);
+			free(to_free1);
+			free(to_free2);
 		}
 	}
 
-- 
2.39.2