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mingw: handle a file owned by the Administrators group correctly

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When an Administrator creates a file or directory, the created
file/directory is owned not by the Administrator SID, but by the
_Administrators Group_ SID. The reason is that users with administrator
privileges usually run in unprivileged ("non-elevated") mode, and their
user SID does not change when running in elevated mode.

This is is relevant e.g. when running a GitHub workflow on a build
agent, which runs in elevated mode: cloning a Git repository in a script
step will cause the worktree to be owned by the Administrators Group
SID, for example.

Let's handle this case as following: if the current user is an
administrator, Git should consider a worktree owned by the
Administrators Group as if it were owned by said user.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Johannes Schindelin
2022-08-08 13:27:50 +00:00
committed by Junio C Hamano
parent 7c83470e64
commit 3f7207e2ea
1 changed files with 10 additions and 0 deletions
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10
compat/mingw.c
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@ -2728,6 +2728,7 @@ int is_path_owned_by_current_sid(const char *path, struct strbuf *report)
else if (sid && IsValidSid(sid)) {
/* Now, verify that the SID matches the current user's */
static PSID current_user_sid;
BOOL is_member;
if (!current_user_sid)
current_user_sid = get_current_user_sid();
@ -2736,6 +2737,15 @@ int is_path_owned_by_current_sid(const char *path, struct strbuf *report)
IsValidSid(current_user_sid) &&
EqualSid(sid, current_user_sid))
result = 1;
else if (IsWellKnownSid(sid, WinBuiltinAdministratorsSid) &&
CheckTokenMembership(NULL, sid, &is_member) &&
is_member)
/*
* If owned by the Administrators group, and the
* current user is an administrator, we consider that
* okay, too.
*/
result = 1;
else if (report &&
IsWellKnownSid(sid, WinWorldSid) &&
!acls_supported(path)) {