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100
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1 /*
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2 Simple program to start Emacs with its console window hidden.
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3
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4 This program is provided purely for convenience, since most users will
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5 use Emacs in windowing (GUI) mode, and will not want to have an extra
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6 console window lying around. */
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7
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8 /*
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9 You may want to define this if you want to be able to install updated
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10 emacs binaries even when other users are using the current version.
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11 The problem with some file servers (notably Novell) is that an open
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12 file cannot be overwritten, deleted, or even renamed. So if someone
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13 is running emacs.exe already, you cannot install a newer version.
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14 By defining CHOOSE_NEWEST_EXE, you can name your new emacs.exe
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15 something else which matches "emacs*.exe", and runemacs will
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16 automatically select the newest emacs executeable in the bin directory.
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17 (So you'll probably be able to delete the old version some hours/days
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18 later).
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19 */
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20
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21 /* #define CHOOSE_NEWEST_EXE */
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22
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23 #define WIN32
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24
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25 #include <windows.h>
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26 #include <string.h>
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27 #include <malloc.h>
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28
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29 int WINAPI
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30 WinMain (HINSTANCE hSelf, HINSTANCE hPrev, LPSTR cmdline, int nShow)
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31 {
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32 STARTUPINFO start;
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33 SECURITY_ATTRIBUTES sec_attrs;
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34 SECURITY_DESCRIPTOR sec_desc;
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35 PROCESS_INFORMATION child;
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36 int wait_for_child = FALSE;
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37 DWORD ret_code = 0;
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38 char *new_cmdline;
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39 char *p;
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40 char modname[MAX_PATH];
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41
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42 if (!GetModuleFileName (NULL, modname, MAX_PATH))
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43 goto error;
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44 if ((p = strrchr (modname, '\\')) == NULL)
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45 goto error;
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46 *p = 0;
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47
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48 new_cmdline = alloca (MAX_PATH + strlen (cmdline) + 1);
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49 strcpy (new_cmdline, modname);
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50
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51 #ifdef CHOOSE_NEWEST_EXE
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52 {
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53 /* Silly hack to allow new versions to be installed on
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54 server even when current version is in use. */
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55
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56 char * best_name = alloca (MAX_PATH + 1);
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57 FILETIME best_time = {0,0};
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58 WIN32_FIND_DATA wfd;
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59 HANDLE fh;
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60 p = new_cmdline + strlen (new_cmdline);
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61 strcpy (p, "\\emacs*.exe ");
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62 fh = FindFirstFile (new_cmdline, &wfd);
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63 if (fh == INVALID_HANDLE_VALUE)
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64 goto error;
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65 do
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66 {
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67 if (wfd.ftLastWriteTime.dwHighDateTime > best_time.dwHighDateTime
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68 || (wfd.ftLastWriteTime.dwHighDateTime == best_time.dwHighDateTime
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69 && wfd.ftLastWriteTime.dwLowDateTime > best_time.dwLowDateTime))
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70 {
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71 best_time = wfd.ftLastWriteTime;
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72 strcpy (best_name, wfd.cFileName);
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73 }
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74 }
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75 while (FindNextFile (fh, &wfd));
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76 FindClose (fh);
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77 *p++ = '\\';
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78 strcpy (p, best_name);
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79 strcat (p, " ");
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80 }
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81 #else
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82 strcat (new_cmdline, "\\emacs.exe ");
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83 #endif
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84
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85 /* Append original arguments if any; first look for -wait as first
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86 argument, and apply that ourselves. */
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87 if (strncmp (cmdline, "-wait", 5) == 0)
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88 {
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89 wait_for_child = TRUE;
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90 cmdline += 5;
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91 }
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92 strcat (new_cmdline, cmdline);
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93
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94 /* Set emacs_dir variable if runemacs was in "%emacs_dir%\bin". */
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95 if ((p = strrchr (modname, '\\')) && stricmp (p, "\\bin") == 0)
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96 {
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97 *p = 0;
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98 for (p = modname; *p; p++)
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99 if (*p == '\\') *p = '/';
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100 SetEnvironmentVariable ("emacs_dir", modname);
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101 }
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102
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103 memset (&start, 0, sizeof (start));
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104 start.cb = sizeof (start);
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105 start.dwFlags = STARTF_USESHOWWINDOW;
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106 start.wShowWindow = SW_HIDE;
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107
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108 sec_attrs.nLength = sizeof (sec_attrs);
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109 sec_attrs.lpSecurityDescriptor = NULL;
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110 sec_attrs.bInheritHandle = FALSE;
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111
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112 if (CreateProcess (NULL, new_cmdline, &sec_attrs, NULL, TRUE, 0,
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113 NULL, NULL, &start, &child))
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114 {
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115 if (wait_for_child)
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116 {
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117 WaitForSingleObject (child.hProcess, INFINITE);
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118 GetExitCodeProcess (child.hProcess, &ret_code);
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119 }
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120 CloseHandle (child.hThread);
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121 CloseHandle (child.hProcess);
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122 }
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123 else
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124 goto error;
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125 return (int) ret_code;
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126
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127 error:
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128 MessageBox (NULL, "Could not start Emacs.", "Error", MB_ICONSTOP);
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129 return 1;
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130 }
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