nt/addpm.c

   1 /* Add entries to the GNU Emacs Program Manager folder.
   2    Copyright (C) 1995, 2001-2017 Free Software Foundation, Inc.
   3
   4 This file is part of GNU Emacs.
   5
   6 GNU Emacs is free software: you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation, either version 3 of the License, or (at
   9 your option) any later version.
  10
  11 GNU Emacs is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.  */
  18
  19 /****************************************************************************
  20  *
  21  * Program: addpm       (adds emacs to the Windows program manager)
  22  *
  23  * Usage:
  24  *      argv[1] = install path for emacs
  25  *
  26  * argv[2] used to be an optional argument for setting the icon.
  27  * But now Emacs has a professional looking icon of its own.
  28  * If users really want to change it, they can go into the settings of
  29  * the shortcut that is created and do it there.
  30  */
  31
  32 /* Use parts of shell API that were introduced by the merge of IE4
  33    into the desktop shell.  If Windows 95 or NT4 users do not have IE4
  34    installed, then the DDE fallback for creating icons the Windows 3.1
  35    progman way will be used instead, but that is prone to lockups
  36    caused by other applications not servicing their message queues.  */
  37 #include <stdlib.h>
  38 #include <stdio.h>
  39 #include <malloc.h>
  40
  41 /* MinGW64 barfs if _WIN32_IE is defined to anything below 0x500.  */
  42 #ifndef MINGW_W64
  43 #define _WIN32_IE 0x400
  44 #endif
  45 /* Request C Object macros for COM interfaces.  */
  46 #define COBJMACROS 1
  47
  48 #include <windows.h>
  49 #include <shlobj.h>
  50 #include <ddeml.h>
  51
  52 #ifndef OLD_PATHS
  53 #include "../src/epaths.h"
  54 #endif
  55
  56 HDDEDATA CALLBACK DdeCallback (UINT, UINT, HCONV, HSZ, HSZ, HDDEDATA, DWORD,
  57                                DWORD);
  58
  59 HDDEDATA CALLBACK
  60 DdeCallback (UINT uType, UINT uFmt, HCONV hconv,
  61              HSZ hsz1, HSZ hsz2, HDDEDATA hdata,
  62              DWORD dwData1, DWORD dwData2)
  63 {
  64   return ((HDDEDATA) NULL);
  65 }
  66
  67 #define DdeCommand(str)         \
  68         DdeClientTransaction ((LPBYTE)str, strlen (str)+1, conversation, (HSZ)NULL, \
  69                               CF_TEXT, XTYP_EXECUTE, 30000, NULL)
  70
  71 #define REG_ROOT "SOFTWARE\\GNU\\Emacs"
  72 #define REG_APP_PATH \
  73   "SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\App Paths\\emacs.exe"
  74
  75 static struct entry
  76 {
  77   const char *name;
  78   const char *value;
  79 }
  80 env_vars[] =
  81 {
  82 #ifdef OLD_PATHS
  83   {"emacs_dir", NULL},
  84   {"EMACSLOADPATH", "%emacs_dir%/site-lisp;%emacs_dir%/../site-lisp;%emacs_dir%/lisp"},
  85   {"SHELL", "%emacs_dir%/bin/cmdproxy.exe"},
  86   {"EMACSDATA", "%emacs_dir%/etc"},
  87   {"EMACSPATH", "%emacs_dir%/bin"},
  88   /* We no longer set INFOPATH because Info-default-directory-list
  89      is then ignored.  */
  90   /*  {"INFOPATH", "%emacs_dir%/info"},  */
  91   {"EMACSDOC", "%emacs_dir%/etc"},
  92   {"TERM", "cmd"}
  93 #else  /* !OLD_PATHS */
  94   {"emacs_dir", NULL},
  95   {"EMACSLOADPATH", PATH_SITELOADSEARCH ";" PATH_LOADSEARCH},
  96   {"SHELL", PATH_EXEC "/cmdproxy.exe"},
  97   {"EMACSDATA", PATH_DATA},
  98   {"EMACSPATH", PATH_EXEC},
  99   /* We no longer set INFOPATH because Info-default-directory-list
 100      is then ignored.  */
 101   /*  {"INFOPATH", "%emacs_dir%/info"},  */
 102   {"EMACSDOC", PATH_DOC},
 103   {"TERM", "cmd"}
 104 #endif
 105 };
 106
 107 static void
 108 add_registry (const char *path)
 109 {
 110   HKEY hrootkey = NULL;
 111   int i;
 112
 113   /* Record the location of Emacs to the App Paths key if we have
 114      sufficient permissions to do so.  This helps Windows find emacs quickly
 115      if the user types emacs.exe in the "Run Program" dialog without having
 116      emacs on their path.  Some applications also use the same registry key
 117      to discover the installation directory for programs they are looking for.
 118      Multiple installations cannot be handled by this method, but it does not
 119      affect the general operation of other installations of Emacs, and we
 120      are blindly overwriting the Start Menu entries already.
 121   */
 122   if (RegCreateKeyEx (HKEY_LOCAL_MACHINE, REG_APP_PATH, 0, NULL,
 123                       REG_OPTION_NON_VOLATILE, KEY_WRITE, NULL,
 124                       &hrootkey, NULL) == ERROR_SUCCESS)
 125     {
 126       int len;
 127       char *emacs_path;
 128
 129       len = strlen (path) + 15; /* \bin\emacs.exe + terminator.  */
 130       emacs_path = (char *) alloca (len);
 131       sprintf (emacs_path, "%s\\bin\\emacs.exe", path);
 132
 133       RegSetValueEx (hrootkey, NULL, 0, REG_EXPAND_SZ, emacs_path, len);
 134       RegCloseKey (hrootkey);
 135     }
 136
 137   /* Previous versions relied on registry settings, but we do not need
 138      them any more.  If registry settings are installed from a previous
 139      version, replace them to ensure they are the current settings.
 140      Otherwise, do nothing.  */
 141
 142   /* Check both the current user and the local machine to see if we
 143      have any resources.  */
 144
 145   if (RegOpenKeyEx (HKEY_LOCAL_MACHINE, REG_ROOT, 0,
 146                     KEY_WRITE | KEY_QUERY_VALUE, &hrootkey) != ERROR_SUCCESS
 147       && RegOpenKeyEx (HKEY_CURRENT_USER, REG_ROOT, 0,
 148                        KEY_WRITE | KEY_QUERY_VALUE, &hrootkey) != ERROR_SUCCESS)
 149     return;
 150
 151   for (i = 0; i < (sizeof (env_vars) / sizeof (env_vars[0])); i++)
 152     {
 153       const char * value = env_vars[i].value ? env_vars[i].value : path;
 154
 155       /* Replace only those settings that already exist.  */
 156       if (RegQueryValueEx (hrootkey, env_vars[i].name, NULL,
 157                            NULL, NULL, NULL) == ERROR_SUCCESS)
 158         RegSetValueEx (hrootkey, env_vars[i].name, 0, REG_EXPAND_SZ,
 159                        value, lstrlen (value) + 1);
 160     }
 161
 162   RegCloseKey (hrootkey);
 163 }
 164
 165 int
 166 main (int argc, char *argv[])
 167 {
 168   char start_folder[MAX_PATH + 1];
 169   int shortcuts_created = 0;
 170   int com_available = 1;
 171   char modname[MAX_PATH];
 172   const char *prog_name;
 173   const char *emacs_path;
 174   char *p;
 175   int quiet = 0;
 176   HRESULT result;
 177   IShellLinkA *shortcut;
 178
 179   /* If no args specified, use our location to set emacs_path.  */
 180
 181   if (argc > 1
 182       && (argv[1][0] == '/' || argv[1][0] == '-')
 183       && argv[1][1] == 'q')
 184     {
 185       quiet = 1;
 186       --argc;
 187       ++argv;
 188     }
 189
 190   if (argc > 1)
 191     emacs_path = argv[1];
 192   else
 193     {
 194       if (!GetModuleFileName (NULL, modname, MAX_PATH) ||
 195           (p = strrchr (modname, '\\')) == NULL)
 196         {
 197           fprintf (stderr, "fatal error");
 198           exit (1);
 199         }
 200       *p = 0;
 201
 202       /* Set emacs_path to emacs_dir if we are in "%emacs_dir%\bin".  */
 203       if ((p = strrchr (modname, '\\')) && stricmp (p, "\\bin") == 0)
 204         {
 205           *p = 0;
 206           emacs_path = modname;
 207         }
 208       else
 209         {
 210           fprintf (stderr, "usage: addpm emacs_path\n");
 211           exit (1);
 212         }
 213
 214       /* Tell user what we are going to do.  */
 215       if (!quiet)
 216         {
 217           int result;
 218
 219           char msg[ MAX_PATH ];
 220           sprintf (msg, "Install Emacs at %s?\n", emacs_path);
 221           result = MessageBox (NULL, msg, "Install Emacs",
 222                                MB_OKCANCEL | MB_ICONQUESTION);
 223           if (result != IDOK)
 224             {
 225               fprintf (stderr, "Install canceled\n");
 226               exit (1);
 227             }
 228         }
 229     }
 230
 231   add_registry (emacs_path);
 232   prog_name =  "runemacs.exe";
 233
 234   /* Try to install globally.  */
 235
 236   if (!SUCCEEDED (CoInitialize (NULL))
 237       || !SUCCEEDED (CoCreateInstance (&CLSID_ShellLink, NULL,
 238                                         CLSCTX_INPROC_SERVER, &IID_IShellLinkA,
 239                                         (void **) &shortcut)))
 240     {
 241       com_available = 0;
 242     }
 243
 244   if (com_available
 245       && SHGetSpecialFolderPath (NULL, start_folder, CSIDL_COMMON_PROGRAMS, 0))
 246     {
 247       if (strlen (start_folder) < (MAX_PATH - 20))
 248         {
 249           strcat (start_folder, "\\Gnu Emacs");
 250           if (CreateDirectory (start_folder, NULL)
 251               || GetLastError () == ERROR_ALREADY_EXISTS)
 252             {
 253               char full_emacs_path[MAX_PATH + 1];
 254               IPersistFile *lnk;
 255               strcat (start_folder, "\\Emacs.lnk");
 256               sprintf (full_emacs_path, "%s\\bin\\%s", emacs_path, prog_name);
 257               IShellLinkA_SetPath (shortcut, full_emacs_path);
 258               IShellLinkA_SetDescription (shortcut, "GNU Emacs");
 259               result = IShellLinkA_QueryInterface (shortcut, &IID_IPersistFile,
 260                                                    (void **) &lnk);
 261               if (SUCCEEDED (result))
 262                 {
 263                   wchar_t unicode_path[MAX_PATH];
 264                   MultiByteToWideChar (CP_ACP, 0, start_folder, -1,
 265                                        unicode_path, MAX_PATH);
 266                   if (SUCCEEDED (IPersistFile_Save (lnk, unicode_path, TRUE)))
 267                     shortcuts_created = 1;
 268                   IPersistFile_Release (lnk);
 269                 }
 270             }
 271         }
 272     }
 273
 274   if (!shortcuts_created && com_available
 275       && SHGetSpecialFolderPath (NULL, start_folder, CSIDL_PROGRAMS, 0))
 276     {
 277       /* Ensure there is enough room for "...\GNU Emacs\Emacs.lnk".  */
 278       if (strlen (start_folder) < (MAX_PATH - 20))
 279         {
 280           strcat (start_folder, "\\Gnu Emacs");
 281           if (CreateDirectory (start_folder, NULL)
 282               || GetLastError () == ERROR_ALREADY_EXISTS)
 283             {
 284               char full_emacs_path[MAX_PATH + 1];
 285               IPersistFile *lnk;
 286               strcat (start_folder, "\\Emacs.lnk");
 287               sprintf (full_emacs_path, "%s\\bin\\%s", emacs_path, prog_name);
 288               IShellLinkA_SetPath (shortcut, full_emacs_path);
 289               IShellLinkA_SetDescription (shortcut, "GNU Emacs");
 290               result = IShellLinkA_QueryInterface (shortcut, &IID_IPersistFile,
 291                                                    (void **) &lnk);
 292               if (SUCCEEDED (result))
 293                 {
 294                   wchar_t unicode_path[MAX_PATH];
 295                   MultiByteToWideChar (CP_ACP, 0, start_folder, -1,
 296                                        unicode_path, MAX_PATH);
 297                   if (SUCCEEDED (IPersistFile_Save (lnk, unicode_path, TRUE)))
 298                     shortcuts_created = 1;
 299                   IPersistFile_Release (lnk);
 300
 301                 }
 302             }
 303         }
 304     }
 305
 306   if (com_available)
 307     IShellLinkA_Release (shortcut);
 308
 309   /* Need to call uninitialize, even if ComInitialize failed.  */
 310   CoUninitialize ();
 311
 312   /* Fallback on old DDE method if the above failed.  */
 313   if (!shortcuts_created)
 314     {
 315       DWORD dde = 0;
 316       HCONV conversation;
 317       HSZ progman;
 318       char add_item[MAX_PATH*2 + 100];
 319
 320       DdeInitialize (&dde, (PFNCALLBACK) DdeCallback, APPCMD_CLIENTONLY, 0);
 321       progman = DdeCreateStringHandle (dde, "PROGMAN", CP_WINANSI);
 322       conversation = DdeConnect (dde, progman, progman, NULL);
 323       if (conversation)
 324         {
 325           DdeCommand ("[CreateGroup (\"Gnu Emacs\")]");
 326           DdeCommand ("[ReplaceItem (Emacs)]");
 327           sprintf (add_item, "[AddItem (\"%s\\bin\\%s\", Emacs)]",
 328                    emacs_path, prog_name);
 329           DdeCommand (add_item);
 330
 331           DdeDisconnect (conversation);
 332         }
 333
 334       DdeFreeStringHandle (dde, progman);
 335       DdeUninitialize (dde);
 336    }
 337
 338   return 0;
 339 }