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(unsigned long seconds)
  39 {
  40   Sleep (seconds * 1000);
  41 }
  42
  43 /* Get the current working directory.  */
  44 char *
  45 getwd (char *dir)
  46 {
  47   if (GetCurrentDirectory (MAXPATHLEN, dir) > 0)
  48     return dir;
  49   return NULL;
  50 }
  51
  52 static HANDLE getppid_parent;
  53 static int    getppid_ppid;
  54
  55 int
  56 getppid(void)
  57 {
  58   char *ppid;
  59   DWORD result;
  60
  61   ppid = getenv ("EM_PARENT_PROCESS_ID");
  62   if (!ppid)
  63     {
  64       printf("no pid.\n");
  65       return 0;
  66     }
  67   else
  68     {
  69       getppid_ppid = atoi (ppid);
  70     }
  71
  72   if (!getppid_parent)
  73     {
  74       getppid_parent = OpenProcess (SYNCHRONIZE, FALSE, atoi(ppid));
  75       if (!getppid_parent)
  76         {
  77           printf ("Failed to open handle to parent process: %d\n",
  78                  GetLastError());
  79           exit (1);
  80         }
  81     }
  82
  83   result = WaitForSingleObject (getppid_parent, 0);
  84   switch (result)
  85     {
  86     case WAIT_TIMEOUT:
  87       /* The parent is still alive.  */
  88       return getppid_ppid;
  89     case WAIT_OBJECT_0:
  90       /* The parent is gone.  Return the pid of Unix init (1).  */
  91       return 1;
  92     case WAIT_FAILED:
  93     default:
  94       printf ("Checking parent status failed: %d\n", GetLastError());
  95       exit (1);
  96     }
  97 }
  98
  99 char *
 100 getlogin ()
 101 {
 102   static char user_name[256];
 103   DWORD  length = sizeof (user_name);
 104
 105   if (GetUserName (user_name, &length))
 106     return user_name;
 107   return NULL;
 108 }
 109
 110 char *
 111 cuserid (char * s)
 112 {
 113   char * name = getlogin ();
 114   if (s)
 115     return strcpy (s, name ? name : "");
 116   return name;
 117 }
 118
 119 int
 120 getuid ()
 121 {
 122   return 0;
 123 }
 124
 125 int
 126 setuid (int uid)
 127 {
 128   return 0;
 129 }
 130
 131 struct passwd *
 132 getpwuid (int uid)
 133 {
 134   return NULL;
 135 }
 136
 137 char *
 138 getpass (const char * prompt)
 139 {
 140   static char input[256];
 141   HANDLE in;
 142   HANDLE err;
 143   DWORD  count;
 144
 145   in = GetStdHandle (STD_INPUT_HANDLE);
 146   err = GetStdHandle (STD_ERROR_HANDLE);
 147
 148   if (in == INVALID_HANDLE_VALUE || err == INVALID_HANDLE_VALUE)
 149     return NULL;
 150
 151   if (WriteFile (err, prompt, strlen (prompt), &count, NULL))
 152     {
 153       int istty = (GetFileType (in) == FILE_TYPE_CHAR);
 154       DWORD old_flags;
 155       int rc;
 156
 157       if (istty)
 158         {
 159           if (GetConsoleMode (in, &old_flags))
 160             SetConsoleMode (in, ENABLE_LINE_INPUT | ENABLE_PROCESSED_INPUT);
 161           else
 162             istty = 0;
 163         }
 164       rc = ReadFile (in, input, sizeof (input), &count, NULL);
 165       if (count >= 2 && input[count - 2] == '\r')
 166         input[count - 2] = '\0';
 167       else
 168         {
 169           char buf[256];
 170           while (ReadFile (in, buf, sizeof (buf), &count, NULL) > 0)
 171             if (count >= 2 && buf[count - 2] == '\r')
 172               break;
 173         }
 174       WriteFile (err, "\r\n", 2, &count, NULL);
 175       if (istty)
 176         SetConsoleMode (in, old_flags);
 177       if (rc)
 178         return input;
 179     }
 180
 181   return NULL;
 182 }
 183
 184 int
 185 fchown (int fd, int uid, int gid)
 186 {
 187   return 0;
 188 }
 189
 190 /* Place a wrapper around the MSVC version of ctime.  It returns NULL
 191    on network directories, so we handle that case here.
 192    (Ulrich Leodolter, 1/11/95).  */
 193 char *
 194 sys_ctime (const time_t *t)
 195 {
 196   char *str = (char *) ctime (t);
 197   return (str ? str : "Sun Jan 01 00:00:00 1970");
 198 }
 199
 200 FILE *
 201 sys_fopen(const char * path, const char * mode)
 202 {
 203   return fopen (path, mode);
 204 }
 205
 206 int
 207 sys_chdir (const char * path)
 208 {
 209   return _chdir (path);
 210 }