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 static char *cvsid = "\n%%% $Id$\n";
  27
  28 #include "win32.h"
  29
  30 #include <stdio.h>
  31 #include <stdlib.h>
  32 #include "resource.h"
  33 #include "dialog.h"
  34 #include "state.h"
  35 #include "msg.h"
  36 #include "netio.h"
  37 #include "find.h"
  38 #include "mount.h"
  39 #include "log.h"
  40 #include "version.h"
  41
  42 #include "port.h"
  43
  44 void netio_test (char *);
  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 (dacl->DefaultDacl, ACL_REVISION, GENERIC_ALL, sid))
  98     {
  99       log (LOG_TIMESTAMP, "AddAccessAllowedAce() failed: %lu", GetLastError ());
 100       goto out;
 101     }
 102
 103   /* Get the processes access token. */
 104   HANDLE token;
 105   if (!OpenProcessToken (GetCurrentProcess (),
 106                          TOKEN_READ | TOKEN_ADJUST_DEFAULT, &token))
 107     {
 108       log (LOG_TIMESTAMP, "OpenProcessToken() failed: %lu", GetLastError ());
 109       goto out;
 110     }
 111
 112   /* Set the default DACL to the above computed ACL. */
 113   if (!SetTokenInformation (token, TokenDefaultDacl, dacl, sizeof buf))
 114     log (LOG_TIMESTAMP, "OpenProcessToken() failed: %lu", GetLastError ());
 115
 116   /* Close token handle. */
 117   CloseHandle (token);
 118
 119 out:
 120   /* Free memory occupied by the "Everyone" SID. */
 121   FreeSid (sid);
 122 }
 123
 124 int WINAPI
 125 WinMain (HINSTANCE h,
 126          HINSTANCE hPrevInstance,
 127          LPSTR command_line,
 128          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:        do_splash (h);  break;
 158         case IDD_SOURCE:        do_source (h);  break;
 159         case IDD_LOCAL_DIR:     do_local_dir (h); break;
 160         case IDD_ROOT:          do_root (h);    break;
 161         case IDD_NET:           do_net (h);     break;
 162         case IDD_SITE:          do_site (h);    break;
 163         case IDD_OTHER_URL:     do_other (h);   break;
 164         case IDD_S_LOAD_INI:    do_ini (h);     break;
 165         case IDD_S_FROM_CWD:    do_fromcwd (h); break;
 166         case IDD_CHOOSE:        do_choose (h);  break;
 167         case IDD_S_DOWNLOAD:    do_download (h); break;
 168         case IDD_S_INSTALL:     do_install (h); break;
 169         case IDD_DESKTOP:       do_desktop (h); break;
 170         case IDD_S_POSTINSTALL: do_postinstall (h); break;
 171
 172         default:
 173           next_dialog = 0;
 174           break;
 175         }
 176     }
 177
 178   exit_setup (0);
 179 }