lib-src/ntlib.c

   1 /* Utility and Unix shadow routines for GNU Emacs support programs on NT.
   2    Copyright (C) 1994 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 2, or (at your option)
   9 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; see the file COPYING.  If not, write to
  18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19 Boston, MA 02111-1307, USA.
  20
  21    Geoff Voelker (voelker@cs.washington.edu)                         10-8-94
  22 */
  23
  24 #include <windows.h>
  25 #include <stdlib.h>
  26 #include <stdio.h>
  27 #include <time.h>
  28 #include <direct.h>
  29
  30 #include "ntlib.h"
  31
  32 #define MAXPATHLEN _MAX_PATH
  33
  34 /* Emulate sleep...we could have done this with a define, but that
  35    would necessitate including windows.h in the files that used it.
  36    This is much easier.  */
  37 void
  38 sleep(int seconds)
  39 {
  40   Sleep (seconds * 1000);
  41 }
  42
  43 /* Get the current working directory.  */
  44 int
  45 getwd (char *dir)
  46 {
  47   if (GetCurrentDirectory (MAXPATHLEN, dir) > 0)
  48     return dir;
  49   return NULL;
  50 }
  51
  52 int
  53 getpid ()
  54 {
  55   return _getpid ();
  56 }
  57
  58 static HANDLE getppid_parent;
  59 static int    getppid_ppid;
  60
  61 int
  62 getppid(void)
  63 {
  64   char *ppid;
  65   DWORD result;
  66
  67   ppid = getenv ("__PARENT_PROCESS_ID");
  68   if (!ppid)
  69     {
  70       printf("no pid.\n");
  71       return 0;
  72     }
  73   else
  74     {
  75       getppid_ppid = atoi (ppid);
  76     }
  77
  78   if (!getppid_parent)
  79     {
  80       getppid_parent = OpenProcess (SYNCHRONIZE, FALSE, atoi(ppid));
  81       if (!getppid_parent)
  82         {
  83           printf ("Failed to open handle to parent process: %d\n",
  84                  GetLastError());
  85           exit (1);
  86         }
  87     }
  88
  89   result = WaitForSingleObject (getppid_parent, 0);
  90   switch (result)
  91     {
  92     case WAIT_TIMEOUT:
  93       /* The parent is still alive.  */
  94       return getppid_ppid;
  95     case WAIT_OBJECT_0:
  96       /* The parent is gone.  Return the pid of Unix init (1).  */
  97       return 1;
  98     case WAIT_FAILED:
  99     default:
 100       printf ("Checking parent status failed: %d\n", GetLastError());
 101       exit (1);
 102     }
 103 }
 104
 105 char *
 106 getlogin ()
 107 {
 108   static char user_name[256];
 109   DWORD  length = sizeof (user_name);
 110
 111   if (GetUserName (user_name, &length))
 112     return user_name;
 113   return NULL;
 114 }
 115
 116 char *
 117 cuserid (char * s)
 118 {
 119   char * name = getlogin ();
 120   if (s)
 121     return strcpy (s, name ? name : "");
 122   return name;
 123 }
 124
 125 int
 126 getuid ()
 127 {
 128   return 0;
 129 }
 130
 131 int
 132 setuid (int uid)
 133 {
 134   return 0;
 135 }
 136
 137 struct passwd *
 138 getpwuid (int uid)
 139 {
 140   return NULL;
 141 }
 142
 143 char *
 144 getpass (const char * prompt)
 145 {
 146   static char input[256];
 147   HANDLE in;
 148   HANDLE err;
 149   DWORD  count;
 150
 151   in = GetStdHandle (STD_INPUT_HANDLE);
 152   err = GetStdHandle (STD_ERROR_HANDLE);
 153
 154   if (in == INVALID_HANDLE_VALUE || err == INVALID_HANDLE_VALUE)
 155     return NULL;
 156
 157   if (WriteFile (err, prompt, strlen (prompt), &count, NULL))
 158     {
 159       int istty = (GetFileType (in) == FILE_TYPE_CHAR);
 160       DWORD old_flags;
 161       int rc;
 162
 163       if (istty)
 164         {
 165           if (GetConsoleMode (in, &old_flags))
 166             SetConsoleMode (in, ENABLE_LINE_INPUT | ENABLE_PROCESSED_INPUT);
 167           else
 168             istty = 0;
 169         }
 170       rc = ReadFile (in, input, sizeof (input), &count, NULL);
 171       if (count >= 2 && input[count - 2] == '\r')
 172         input[count - 2] = '\0';
 173       else
 174         {
 175           char buf[256];
 176           while (ReadFile (in, buf, sizeof (buf), &count, NULL) > 0)
 177             if (count >= 2 && buf[count - 2] == '\r')
 178               break;
 179         }
 180       WriteFile (err, "\r\n", 2, &count, NULL);
 181       if (istty)
 182         SetConsoleMode (in, old_flags);
 183       if (rc)
 184         return input;
 185     }
 186
 187   return NULL;
 188 }
 189
 190 int
 191 fchown (int fd, int uid, int gid)
 192 {
 193   return 0;
 194 }
 195
 196 /* Place a wrapper around the MSVC version of ctime.  It returns NULL
 197    on network directories, so we handle that case here.
 198    (Ulrich Leodolter, 1/11/95).  */
 199 char *
 200 sys_ctime (const time_t *t)
 201 {
 202   char *str = (char *) ctime (t);
 203   return (str ? str : "Sun Jan 01 00:00:00 1970");
 204 }
 205
 206 FILE *
 207 sys_fopen(const char * path, const char * mode)
 208 {
 209   return fopen (path, mode);
 210 }
 211
 212 int
 213 sys_chdir (const char * path)
 214 {
 215   return _chdir (path);
 216 }