* passwd.c: Rearrange includes to avoid unnecessary warnings.

(GetPW): Add parameter to (dis)allow printing of Windows username.
	Use defines instead of numerical constants where possible.
	Try avoiding impersonation problem.  Rearrange to print Windows
	username only if it's different from Cygwin username.
	(ChangePW): Use defines instead of numerical constants where possible.
	(main): Call GetPW with additional parameter.  Change error text.

	* passwd.c (GetPW): Handle case of user-edited /etc/passwd
	with cygwin_internal (CW_EXTRACT_DOMAIN_AND_USER, ...).

winsup/utils/ChangeLog

@@ -1,3 +1,18 @@
+2002-06-14  Corinna Vinschen  <corinna@vinschen.de>
+
+	* passwd.c: Rearrange includes to avoid unnecessary warnings.
+	(GetPW): Add parameter to (dis)allow printing of Windows username.
+	Use defines instead of numerical constants where possible.
+	Try avoiding impersonation problem.  Rearrange to print Windows
+	username only if it's different from Cygwin username.
+	(ChangePW): Use defines instead of numerical constants where possible.
+	(main): Call GetPW with additional parameter.  Change error text.
+
+2002-06-14  Joshua Daniel Franklin <joshuadfranklin@yahoo.com>
+
+	* passwd.c (GetPW): Handle case of user-edited /etc/passwd
+	with cygwin_internal (CW_EXTRACT_DOMAIN_AND_USER, ...).
+
 2002-06-09  Christopher Faylor  <cgf@redhat.com>
 
 	* path.cc (cygpath): Change MOUNT_AUTO to MOUNT_CYGDRIVE.

winsup/utils/passwd.c

@@ -10,21 +10,23 @@ This software is a copyrighted work licensed under the terms of the
 Cygwin license.  Please consult the file "CYGWIN_LICENSE" for
 details. */
 
+#include <windows.h>
+#include <wininet.h>
+#include <lmaccess.h>
+#include <lmerr.h>
+#include <lmcons.h>
+#include <lmapibuf.h>
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 #include <getopt.h>
 #include <pwd.h>
+#include <sys/cygwin.h>
 #include <sys/types.h>
 #include <time.h>
 
-#include <windows.h>
-#include <lmaccess.h>
-#include <lmerr.h>
-#include <lmcons.h>
-#include <lmapibuf.h>
-
 #define USER_PRIV_ADMIN		 2
 
 #define UF_LOCKOUT            0x00010
@@ -102,13 +104,31 @@ EvalRet (int ret, const char *user)
 }
 
 PUSER_INFO_3
-GetPW (const char *user)
+GetPW (char *user, int print_win_name)
 {
-  WCHAR name[512];
+  char usr_buf[UNLEN + 1];
+  WCHAR name[2 * (UNLEN + 1)];
   DWORD ret;
   PUSER_INFO_3 ui;
+  struct passwd *pw;
+  char *domain = (char *) alloca (INTERNET_MAX_HOST_NAME_LENGTH + 1);
      
-  MultiByteToWideChar (CP_ACP, 0, user, -1, name, 512);
+  /* Try getting a Win32 username in case the user edited /etc/passwd */
+  if ((pw = getpwnam (user)))
+    {
+      cygwin_internal (CW_EXTRACT_DOMAIN_AND_USER, pw, domain, usr_buf);
+      if (strcasecmp (pw->pw_name, usr_buf))
+	{
+	  /* Hack to avoid problem with LookupAccountSid after impersonation */
+	  if (strcasecmp (usr_buf, "SYSTEM"))
+	    {
+	      user = usr_buf;
+	      if (print_win_name)
+		printf ("Windows username : %s\n", user);
+	    }
+	}
+    }
+  MultiByteToWideChar (CP_ACP, 0, user, -1, name, 2 * (UNLEN + 1));
   ret = NetUserGetInfo (NULL, name, 3, (LPBYTE *) &ui);
   return EvalRet (ret, user) ? NULL : ui;
 }
@@ -116,10 +136,10 @@ GetPW (const char *user)
 int
 ChangePW (const char *user, const char *oldpwd, const char *pwd, int justcheck)
 {
-  WCHAR name[512], oldpass[512], pass[512];
+  WCHAR name[2 * (UNLEN + 1)], oldpass[512], pass[512];
   DWORD ret;
 
-  MultiByteToWideChar (CP_ACP, 0, user, -1, name, 512);
+  MultiByteToWideChar (CP_ACP, 0, user, -1, name, 2 * (UNLEN + 1));
   MultiByteToWideChar (CP_ACP, 0, pwd, -1, pass, 512);
   if (! oldpwd)
     {
@@ -362,11 +382,11 @@ main (int argc, char **argv)
 
   strcpy (user, optind >= argc ? getlogin () : argv[optind]);
 
-  li = GetPW (getlogin ());
+  li = GetPW (getlogin (), 0);
   if (! li)
     return 1;
 
-  ui = GetPW (user);
+  ui = GetPW (user, 1);
   if (! ui)
     return 1;
 
@@ -377,7 +397,7 @@ main (int argc, char **argv)
       if (lopt)
         {
 	  if (ui->usri3_priv == USER_PRIV_ADMIN)
-	    return eprint (0, "You may not lock an administrators account.");
+	    return eprint (0, "Locking an admin account is disallowed.");
           ui->usri3_flags |= UF_ACCOUNTDISABLE;
         }
       if (uopt)