[Emacs-diffs] Changes to emacs/src/w32.c,v

[Eli Zaretskii]

CVSROOT:        /cvsroot/emacs
Module name:    emacs
Changes by:     Eli Zaretskii <eliz>    08/05/09 09:40:56

Index: w32.c
===================================================================
RCS file: /cvsroot/emacs/emacs/src/w32.c,v
retrieving revision 1.136
retrieving revision 1.137
diff -u -b -r1.136 -r1.137
--- w32.c       23 Apr 2008 05:55:33 -0000      1.136
+++ w32.c       9 May 2008 09:40:56 -0000       1.137
@@ -513,35 +513,38 @@
 
 #define PASSWD_FIELD_SIZE 256
 
-static char the_passwd_name[PASSWD_FIELD_SIZE];
-static char the_passwd_passwd[PASSWD_FIELD_SIZE];
-static char the_passwd_gecos[PASSWD_FIELD_SIZE];
-static char the_passwd_dir[PASSWD_FIELD_SIZE];
-static char the_passwd_shell[PASSWD_FIELD_SIZE];
+static char dflt_passwd_name[PASSWD_FIELD_SIZE];
+static char dflt_passwd_passwd[PASSWD_FIELD_SIZE];
+static char dflt_passwd_gecos[PASSWD_FIELD_SIZE];
+static char dflt_passwd_dir[PASSWD_FIELD_SIZE];
+static char dflt_passwd_shell[PASSWD_FIELD_SIZE];
 
-static struct passwd the_passwd =
+static struct passwd dflt_passwd =
 {
-  the_passwd_name,
-  the_passwd_passwd,
+  dflt_passwd_name,
+  dflt_passwd_passwd,
   0,
   0,
   0,
-  the_passwd_gecos,
-  the_passwd_dir,
-  the_passwd_shell,
+  dflt_passwd_gecos,
+  dflt_passwd_dir,
+  dflt_passwd_shell,
 };
 
-static struct group the_group =
+static char dflt_group_name[GNLEN+1];
+
+static struct group dflt_group =
 {
-  /* There are no groups on NT, so we just return "root" as the
-     group name.  */
-  "root",
+  /* When group information is not available, we return this as the
+     group for all files.  */
+  dflt_group_name,
+  0,
 };
 
 int
 getuid ()
 {
-  return the_passwd.pw_uid;
+  return dflt_passwd.pw_uid;
 }
 
 int
@@ -556,7 +559,7 @@
 int
 getgid ()
 {
-  return the_passwd.pw_gid;
+  return dflt_passwd.pw_gid;
 }
 
 int
@@ -568,15 +571,15 @@
 struct passwd *
 getpwuid (int uid)
 {
-  if (uid == the_passwd.pw_uid)
-    return &the_passwd;
+  if (uid == dflt_passwd.pw_uid)
+    return &dflt_passwd;
   return NULL;
 }
 
 struct group *
 getgrgid (gid_t gid)
 {
-  return &the_group;
+  return &dflt_group;
 }
 
 struct passwd *
@@ -604,27 +607,30 @@
      the user-sid as the user id value (same for group id using the
      primary group sid from the process token). */
 
-  char         name[UNLEN+1], domain[1025];
-  DWORD        length = sizeof (name), dlength = sizeof (domain), trash;
+  char         uname[UNLEN+1], gname[GNLEN+1], domain[1025];
+  DWORD        ulength = sizeof (uname), dlength = sizeof (domain), trash;
+  DWORD               glength = sizeof (gname);
   HANDLE       token = NULL;
   SID_NAME_USE user_type;
   unsigned char buf[1024];
   TOKEN_USER   user_token;
   TOKEN_PRIMARY_GROUP group_token;
 
+  /* "None" is the default group name on standalone workstations.  */
+  strcpy (dflt_group_name, "None");
   if (open_process_token (GetCurrentProcess (), TOKEN_QUERY, &token)
       && get_token_information (token, TokenUser,
                                (PVOID)buf, sizeof (buf), &trash)
       && (memcpy (&user_token, buf, sizeof (user_token)),
-         lookup_account_sid (NULL, user_token.User.Sid, name, &length,
+         lookup_account_sid (NULL, user_token.User.Sid, uname, &ulength,
                              domain, &dlength, &user_type)))
     {
-      strcpy (the_passwd.pw_name, name);
+      strcpy (dflt_passwd.pw_name, uname);
       /* Determine a reasonable uid value.  */
-      if (stricmp ("administrator", name) == 0)
+      if (stricmp ("administrator", uname) == 0)
        {
-         the_passwd.pw_uid = 500; /* well-known Administrator uid */
-         the_passwd.pw_gid = 513; /* well-known None gid */
+         dflt_passwd.pw_uid = 500; /* well-known Administrator uid */
+         dflt_passwd.pw_gid = 513; /* well-known None gid */
        }
       else
        {
@@ -634,10 +640,10 @@
            *get_sid_sub_authority_count (user_token.User.Sid);
 
          if (n_subauthorities < 1)
-           the_passwd.pw_uid = 0;      /* the "World" RID */
+           dflt_passwd.pw_uid = 0;     /* the "World" RID */
          else
            {
-             the_passwd.pw_uid =
+             dflt_passwd.pw_uid =
                *get_sid_sub_authority (user_token.User.Sid,
                                        n_subauthorities - 1);
            }
@@ -651,35 +657,41 @@
                *get_sid_sub_authority_count (group_token.PrimaryGroup);
 
              if (n_subauthorities < 1)
-               the_passwd.pw_gid = 0;  /* the "World" RID */
+               dflt_passwd.pw_gid = 0; /* the "World" RID */
              else
                {
-                 the_passwd.pw_gid =
+                 dflt_passwd.pw_gid =
                    *get_sid_sub_authority (group_token.PrimaryGroup,
                                            n_subauthorities - 1);
                }
+             dlength = sizeof (domain);
+             if (lookup_account_sid (NULL, group_token.PrimaryGroup,
+                                     gname, &glength, NULL, &dlength,
+                                     &user_type))
+               strcpy (dflt_group_name, gname);
            }
          else
-           the_passwd.pw_gid = the_passwd.pw_uid;
+           dflt_passwd.pw_gid = dflt_passwd.pw_uid;
        }
     }
   /* If security calls are not supported (presumably because we
      are running under Windows 95), fallback to this. */
-  else if (GetUserName (name, &length))
+  else if (GetUserName (uname, &ulength))
     {
-      strcpy (the_passwd.pw_name, name);
-      if (stricmp ("administrator", name) == 0)
-       the_passwd.pw_uid = 0;
+      strcpy (dflt_passwd.pw_name, uname);
+      if (stricmp ("administrator", uname) == 0)
+       dflt_passwd.pw_uid = 0;
       else
-       the_passwd.pw_uid = 123;
-      the_passwd.pw_gid = the_passwd.pw_uid;
+       dflt_passwd.pw_uid = 123;
+      dflt_passwd.pw_gid = dflt_passwd.pw_uid;
     }
   else
     {
-      strcpy (the_passwd.pw_name, "unknown");
-      the_passwd.pw_uid = 123;
-      the_passwd.pw_gid = 123;
+      strcpy (dflt_passwd.pw_name, "unknown");
+      dflt_passwd.pw_uid = 123;
+      dflt_passwd.pw_gid = 123;
     }
+  dflt_group.gr_gid = dflt_passwd.pw_gid;
 
   /* Ensure HOME and SHELL are defined. */
   if (getenv ("HOME") == NULL)
@@ -688,8 +700,8 @@
     abort ();
 
   /* Set dir and shell from environment variables. */
-  strcpy (the_passwd.pw_dir, getenv ("HOME"));
-  strcpy (the_passwd.pw_shell, getenv ("SHELL"));
+  strcpy (dflt_passwd.pw_dir, getenv ("HOME"));
+  strcpy (dflt_passwd.pw_shell, getenv ("SHELL"));
 
   if (token)
     CloseHandle (token);
@@ -2727,8 +2739,8 @@
     buf->st_ino = fake_inode;
 
   /* consider files to belong to current user */
-  buf->st_uid = the_passwd.pw_uid;
-  buf->st_gid = the_passwd.pw_gid;
+  buf->st_uid = dflt_passwd.pw_uid;
+  buf->st_gid = dflt_passwd.pw_gid;
 
   /* volume_info is set indirectly by map_w32_filename */
   buf->st_dev = volume_info.serialnum;
@@ -2815,8 +2827,8 @@
     buf->st_ino = fake_inode;
 
   /* consider files to belong to current user */
-  buf->st_uid = the_passwd.pw_uid;
-  buf->st_gid = the_passwd.pw_gid;
+  buf->st_uid = dflt_passwd.pw_uid;
+  buf->st_gid = dflt_passwd.pw_gid;
 
   buf->st_dev = info.dwVolumeSerialNumber;
   buf->st_rdev = info.dwVolumeSerialNumber;