lib-src/ntlib.c

   1 /* Utility and Unix shadow routines for GNU Emacs support programs on NT.
   2    Copyright (C) 1994, 2001, 2002, 2003, 2004, 2005,
   3                  2006, 2007  Free Software Foundation, Inc.
   4
   5 This file is part of GNU Emacs.
   6
   7 GNU Emacs is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GNU Emacs is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU Emacs; see the file COPYING.  If not, write to
  19 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  20 Boston, MA 02110-1301, USA.
  21
  22    Geoff Voelker (voelker@cs.washington.edu)                         10-8-94
  23 */
  24
  25 #include <windows.h>
  26 #include <stdlib.h>
  27 #include <stdio.h>
  28 #include <time.h>
  29 #include <direct.h>
  30
  31 #include "ntlib.h"
  32
  33 #define MAXPATHLEN _MAX_PATH
  34
  35 /* Emulate sleep...we could have done this with a define, but that
  36    would necessitate including windows.h in the files that used it.
  37    This is much easier.  */
  38 void
  39 sleep(unsigned long seconds)
  40 {
  41   Sleep (seconds * 1000);
  42 }
  43
  44 /* Get the current working directory.  */
  45 char *
  46 getwd (char *dir)
  47 {
  48   if (GetCurrentDirectory (MAXPATHLEN, dir) > 0)
  49     return dir;
  50   return NULL;
  51 }
  52
  53 static HANDLE getppid_parent;
  54 static int    getppid_ppid;
  55
  56 int
  57 getppid(void)
  58 {
  59   char *ppid;
  60   DWORD result;
  61
  62   ppid = getenv ("EM_PARENT_PROCESS_ID");
  63   if (!ppid)
  64     {
  65       printf("no pid.\n");
  66       return 0;
  67     }
  68   else
  69     {
  70       getppid_ppid = atoi (ppid);
  71     }
  72
  73   if (!getppid_parent)
  74     {
  75       getppid_parent = OpenProcess (SYNCHRONIZE, FALSE, atoi(ppid));
  76       if (!getppid_parent)
  77         {
  78           printf ("Failed to open handle to parent process: %d\n",
  79                  GetLastError());
  80           exit (1);
  81         }
  82     }
  83
  84   result = WaitForSingleObject (getppid_parent, 0);
  85   switch (result)
  86     {
  87     case WAIT_TIMEOUT:
  88       /* The parent is still alive.  */
  89       return getppid_ppid;
  90     case WAIT_OBJECT_0:
  91       /* The parent is gone.  Return the pid of Unix init (1).  */
  92       return 1;
  93     case WAIT_FAILED:
  94     default:
  95       printf ("Checking parent status failed: %d\n", GetLastError());
  96       exit (1);
  97     }
  98 }
  99
 100 char *
 101 getlogin ()
 102 {
 103   static char user_name[256];
 104   DWORD  length = sizeof (user_name);
 105
 106   if (GetUserName (user_name, &length))
 107     return user_name;
 108   return NULL;
 109 }
 110
 111 char *
 112 cuserid (char * s)
 113 {
 114   char * name = getlogin ();
 115   if (s)
 116     return strcpy (s, name ? name : "");
 117   return name;
 118 }
 119
 120 int
 121 getuid ()
 122 {
 123   return 0;
 124 }
 125
 126 int
 127 setuid (int uid)
 128 {
 129   return 0;
 130 }
 131
 132 struct passwd *
 133 getpwuid (int uid)
 134 {
 135   return NULL;
 136 }
 137
 138 char *
 139 getpass (const char * prompt)
 140 {
 141   static char input[256];
 142   HANDLE in;
 143   HANDLE err;
 144   DWORD  count;
 145
 146   in = GetStdHandle (STD_INPUT_HANDLE);
 147   err = GetStdHandle (STD_ERROR_HANDLE);
 148
 149   if (in == INVALID_HANDLE_VALUE || err == INVALID_HANDLE_VALUE)
 150     return NULL;
 151
 152   if (WriteFile (err, prompt, strlen (prompt), &count, NULL))
 153     {
 154       int istty = (GetFileType (in) == FILE_TYPE_CHAR);
 155       DWORD old_flags;
 156       int rc;
 157
 158       if (istty)
 159         {
 160           if (GetConsoleMode (in, &old_flags))
 161             SetConsoleMode (in, ENABLE_LINE_INPUT | ENABLE_PROCESSED_INPUT);
 162           else
 163             istty = 0;
 164         }
 165       rc = ReadFile (in, input, sizeof (input), &count, NULL);
 166       if (count >= 2 && input[count - 2] == '\r')
 167         input[count - 2] = '\0';
 168       else
 169         {
 170           char buf[256];
 171           while (ReadFile (in, buf, sizeof (buf), &count, NULL) > 0)
 172             if (count >= 2 && buf[count - 2] == '\r')
 173               break;
 174         }
 175       WriteFile (err, "\r\n", 2, &count, NULL);
 176       if (istty)
 177         SetConsoleMode (in, old_flags);
 178       if (rc)
 179         return input;
 180     }
 181
 182   return NULL;
 183 }
 184
 185 int
 186 fchown (int fd, int uid, int gid)
 187 {
 188   return 0;
 189 }
 190
 191 /* Place a wrapper around the MSVC version of ctime.  It returns NULL
 192    on network directories, so we handle that case here.
 193    (Ulrich Leodolter, 1/11/95).  */
 194 char *
 195 sys_ctime (const time_t *t)
 196 {
 197   char *str = (char *) ctime (t);
 198   return (str ? str : "Sun Jan 01 00:00:00 1970");
 199 }
 200
 201 FILE *
 202 sys_fopen(const char * path, const char * mode)
 203 {
 204   return fopen (path, mode);
 205 }
 206
 207 int
 208 sys_chdir (const char * path)
 209 {
 210   return _chdir (path);
 211 }
 212
 213 /* arch-tag: 7b63fb83-70ee-4124-8822-54e53e5d0773
 214    (do not change this comment) */