* grp.cc (internal_getgroups): Drop local buf. Allocate groups

	directly using alloca.

diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog
index 53c506e..93d5eab 100644 (file)
--- a/winsup/cygwin/ChangeLog
+++ b/winsup/cygwin/ChangeLog
@@ -1,3 +1,8 @@
+2008-04-16  Corinna Vinschen  <corinna@vinschen.de>
+
+       * grp.cc (internal_getgroups): Drop local buf.  Allocate groups
+       directly using alloca.
+
 2008-04-14  Corinna Vinschen  <corinna@vinschen.de>
 
        * postinstall: Fix copy/paste bug.

diff --git a/winsup/cygwin/grp.cc b/winsup/cygwin/grp.cc
index 5c35be5..e9e657d 100644 (file)
--- a/winsup/cygwin/grp.cc
+++ b/winsup/cygwin/grp.cc
@@ -365,10 +365,9 @@ internal_getgroups (int gidsetsize, __gid32_t *grouplist, cygpsid * srchsid)
       if (GetTokenInformation (hToken, TokenGroups, NULL, 0, &size)
          || GetLastError () == ERROR_INSUFFICIENT_BUFFER)
        {
-         char buf[size];
-         TOKEN_GROUPS *groups = (TOKEN_GROUPS *) buf;
+         PTOKEN_GROUPS groups = (PTOKEN_GROUPS) alloca (size);
 
-         if (GetTokenInformation (hToken, TokenGroups, buf, size, &size))
+         if (GetTokenInformation (hToken, TokenGroups, groups, size, &size))
            {
              cygsid sid;