main.cc

   1 /*
   2  * Copyright (c) 2000, Red Hat, Inc.
   3  *
   4  *     This program is free software; you can redistribute it and/or modify
   5  *     it under the terms of the GNU General Public License as published by
   6  *     the Free Software Foundation; either version 2 of the License, or
   7  *     (at your option) any later version.
   8  *
   9  *     A copy of the GNU General Public License can be found at
  10  *     http://www.gnu.org/
  11  *
  12  * Written by DJ Delorie <dj@cygnus.com>
  13  *
  14  */
  15
  16 /* OK, here's how this works.  Each of the steps needed for install -
  17    dialogs, downloads, installs - are in their own files and have some
  18    "do_*" function (prototype in dialog.h) and a resource id (IDD_* or
  19    IDD_S_* in resource.h) for that step.  Each step is responsible for
  20    selecting the next step!  See the NEXT macro in dialog.h.  Note
  21    that the IDD_S_* ids are fake; those are for steps that don't
  22    really have a controlling dialog (some have progress dialogs, but
  23    those don't count, although they could).  Replace the IDD_S_* with
  24    IDD_* if you create a real dialog for those steps. */
  25
  26 #if 0
  27 static const char *cvsid =
  28   "\n%%% $Id$\n";
  29 #endif
  30
  31 #include "win32.h"
  32
  33 #include <stdio.h>
  34 #include <stdlib.h>
  35 #include "resource.h"
  36 #include "dialog.h"
  37 #include "state.h"
  38 #include "msg.h"
  39 #include "find.h"
  40 #include "mount.h"
  41 #include "log.h"
  42 #include "version.h"
  43
  44 #include "port.h"
  45
  46 int next_dialog;
  47 int exit_msg = 0;
  48
  49 HINSTANCE hinstance;
  50
  51 /* Maximum size of a SID on NT/W2K. */
  52 #define MAX_SID_LEN     40
  53
  54 /* Computes the size of an ACL in relation to the number of ACEs it
  55    should contain. */
  56 #define TOKEN_ACL_SIZE(cnt) (sizeof(ACL) + \
  57                              (cnt) * (sizeof(ACCESS_ALLOWED_ACE) + MAX_SID_LEN))
  58
  59 #define iswinnt         (GetVersion() < 0x80000000)
  60
  61 void
  62 set_default_dacl ()
  63 {
  64   /* To assure that the created files have a useful ACL, the
  65      default DACL in the process token is set to full access to
  66      everyone. This applies to files and subdirectories created
  67      in directories which don't propagate permissions to child
  68      objects. */
  69
  70   /* Create a buffer which has enough room to contain the TOKEN_DEFAULT_DACL
  71      structure plus an ACL with one ACE. */
  72   char buf[sizeof (TOKEN_DEFAULT_DACL) + TOKEN_ACL_SIZE (1)];
  73
  74   /* First initialize the TOKEN_DEFAULT_DACL structure. */
  75   PTOKEN_DEFAULT_DACL dacl = (PTOKEN_DEFAULT_DACL) buf;
  76   dacl->DefaultDacl = (PACL) (buf + sizeof *dacl);
  77
  78   /* Initialize the ACL for containing one ACE. */
  79   if (!InitializeAcl (dacl->DefaultDacl, TOKEN_ACL_SIZE (1), ACL_REVISION))
  80     {
  81       log (LOG_TIMESTAMP, "InitializeAcl() failed: %lu", GetLastError ());
  82       return;
  83     }
  84
  85   /* Get the SID for "Everyone". */
  86   PSID sid;
  87   SID_IDENTIFIER_AUTHORITY sid_auth = { SECURITY_WORLD_SID_AUTHORITY };
  88   if (!AllocateAndInitializeSid (&sid_auth, 1, 0, 0, 0, 0, 0, 0, 0, 0, &sid))
  89     {
  90       log (LOG_TIMESTAMP, "AllocateAndInitializeSid() failed: %lu",
  91            GetLastError ());
  92       return;
  93     }
  94
  95   /* Create the ACE which grants full access to "Everyone" and store it
  96      in dacl->DefaultDacl. */
  97   if (!AddAccessAllowedAce
  98       (dacl->DefaultDacl, ACL_REVISION, GENERIC_ALL, sid))
  99     {
 100       log (LOG_TIMESTAMP, "AddAccessAllowedAce() failed: %lu",
 101            GetLastError ());
 102       goto out;
 103     }
 104
 105   /* Get the processes access token. */
 106   HANDLE token;
 107   if (!OpenProcessToken (GetCurrentProcess (),
 108                          TOKEN_READ | TOKEN_ADJUST_DEFAULT, &token))
 109     {
 110       log (LOG_TIMESTAMP, "OpenProcessToken() failed: %lu", GetLastError ());
 111       goto out;
 112     }
 113
 114   /* Set the default DACL to the above computed ACL. */
 115   if (!SetTokenInformation (token, TokenDefaultDacl, dacl, sizeof buf))
 116     log (LOG_TIMESTAMP, "OpenProcessToken() failed: %lu", GetLastError ());
 117
 118   /* Close token handle. */
 119   CloseHandle (token);
 120
 121 out:
 122   /* Free memory occupied by the "Everyone" SID. */
 123   FreeSid (sid);
 124 }
 125
 126 int WINAPI
 127 WinMain (HINSTANCE h,
 128          HINSTANCE hPrevInstance, LPSTR command_line, int cmd_show)
 129 {
 130   hinstance = h;
 131
 132   next_dialog = IDD_SPLASH;
 133
 134   log (LOG_TIMESTAMP, "Starting cygwin install, version %s", version);
 135
 136   char cwd[_MAX_PATH];
 137   GetCurrentDirectory (sizeof (cwd), cwd);
 138   local_dir = strdup (cwd);
 139   log (0, "Current Directory: %s", cwd);
 140
 141   char **argv;
 142   int argc;
 143   log (LOG_TIMESTAMP, "Command line parameters\n");
 144   for (argc = 0, argv = __argv; *argv; argv++)
 145     log (LOG_TIMESTAMP, "%d - '%s'\n", argc++, *argv);
 146   log (LOG_TIMESTAMP, "%d parameters passed\n", argc);
 147
 148   /* Set the default DACL only on NT/W2K. 9x/ME has no idea of access
 149      control lists and security at all. */
 150   if (iswinnt)
 151     set_default_dacl ();
 152
 153   while (next_dialog)
 154     {
 155       switch (next_dialog)
 156         {
 157         case IDD_SPLASH:
 158           do_splash (h);
 159           break;
 160         case IDD_SOURCE:
 161           do_source (h);
 162           break;
 163         case IDD_LOCAL_DIR:
 164           do_local_dir (h);
 165           break;
 166         case IDD_ROOT:
 167           do_root (h);
 168           break;
 169         case IDD_NET:
 170           do_net (h);
 171           break;
 172         case IDD_SITE:
 173           do_site (h);
 174           break;
 175         case IDD_OTHER_URL:
 176           do_other (h);
 177           break;
 178         case IDD_S_LOAD_INI:
 179           do_ini (h);
 180           break;
 181         case IDD_S_FROM_CWD:
 182           do_fromcwd (h);
 183           break;
 184         case IDD_CHOOSE:
 185           do_choose (h);
 186           break;
 187         case IDD_S_DOWNLOAD:
 188           do_download (h);
 189           break;
 190         case IDD_S_INSTALL:
 191           do_install (h);
 192           break;
 193         case IDD_DESKTOP:
 194           do_desktop (h);
 195           break;
 196         case IDD_S_POSTINSTALL:
 197           do_postinstall (h);
 198           break;
 199
 200         default:
 201           next_dialog = 0;
 202           break;
 203         }
 204     }
 205
 206   exit_setup (0);
 207   /* Keep gcc happy :} */
 208   return 0;
 209 }