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* grp.cc (read_etc_group): When emulating nonexisting group file on

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NT systems, read primary group SID from process token.  Use that info
	to create correct group entry.  On error or on 9x systems fallback
	to emulating Administrators group as before.
	(read_etc_passwd): When emulating nonexisting passwd file on NT systems,
	read user and primary group SID from process token.  Use that info to
	create correct passwd entry.  On error or on 9x systems fallback to
	emulating user with Administrator user id and Administrators group
	as before.
This commit is contained in:
Corinna Vinschen
2002-06-05 11:56:56 +00:00
parent 38f3936889
commit eceee297d5
3 changed files with 92 additions and 18 deletions
Download Patch File Download Diff File Expand all files Collapse all files

52
winsup/cygwin/grp.cc
View File

@@ -171,19 +171,49 @@ read_etc_group ()
SID_NAME_USE acType;
static char linebuf [200];
debug_printf ("Emulating /etc/group");
strncpy (group_name, "Administrators", sizeof (group_name));
if (! LookupAccountSidA (NULL, well_known_admins_sid, group_name,
&group_name_len, domain_name,
&domain_name_len, &acType))
if (wincap.has_security ())
{
strcpy (group_name, "unknown");
debug_printf ("Failed to get local admins group name. %E");
HANDLE ptok;
cygsid tg;
DWORD siz;
if (OpenProcessToken (GetCurrentProcess (), TOKEN_QUERY, &ptok))
{
if (GetTokenInformation (ptok, TokenPrimaryGroup, &tg,
sizeof tg, &siz)
&& LookupAccountSidA (NULL, tg, group_name,
&group_name_len, domain_name,
&domain_name_len, &acType))
{
char strbuf[100];
snprintf (linebuf, sizeof (linebuf), "%s:%s:%u:",
group_name,
tg.string (strbuf),
*GetSidSubAuthority(tg,
*GetSidSubAuthorityCount(tg) - 1));
debug_printf ("Emulating /etc/group: %s", linebuf);
add_grp_line (linebuf);
group_state = emulated;
}
CloseHandle (ptok);
}
}
if (group_state != emulated)
{
strncpy (group_name, "Administrators", sizeof (group_name));
if (!LookupAccountSidA (NULL, well_known_admins_sid, group_name,
&group_name_len, domain_name,
&domain_name_len, &acType))
{
strcpy (group_name, "unknown");
debug_printf ("Failed to get local admins group name. %E");
}
snprintf (linebuf, sizeof (linebuf), "%s::%u:", group_name,
(unsigned) DEFAULT_GID);
debug_printf ("Emulating /etc/group: %s", linebuf);
add_grp_line (linebuf);
group_state = emulated;
}
snprintf (linebuf, sizeof (linebuf), "%s::%u:\n", group_name,
(unsigned) DEFAULT_GID);
add_grp_line (linebuf);
group_state = emulated;
}
}