ntlib.c 4.21 KB
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/* Utility and Unix shadow routines for GNU Emacs support programs on NT.
   Copyright (C) 1994 Free Software Foundation, Inc.

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This file is part of GNU Emacs.

GNU Emacs is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.

GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Emacs; see the file COPYING.  If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
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   Geoff Voelker (voelker@cs.washington.edu)                         10-8-94
*/

#include <windows.h>
#include <stdlib.h>
#include <stdio.h>
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#include <time.h>
#include <direct.h>

#include "ntlib.h"
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#define MAXPATHLEN _MAX_PATH

/* Emulate sleep...we could have done this with a define, but that
   would necessitate including windows.h in the files that used it.
   This is much easier.  */
void
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sleep(unsigned long seconds)
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{
  Sleep (seconds * 1000);
}

/* Get the current working directory.  */
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char *
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getwd (char *dir)
{
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  if (GetCurrentDirectory (MAXPATHLEN, dir) > 0)
    return dir;
  return NULL;
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}

static HANDLE getppid_parent;
static int    getppid_ppid;

int
getppid(void)
{
  char *ppid;
  DWORD result;

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  ppid = getenv ("EM_PARENT_PROCESS_ID");
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  if (!ppid)
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    {
      printf("no pid.\n");
      return 0;
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    }
  else
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    {
      getppid_ppid = atoi (ppid);
    }

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  if (!getppid_parent)
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    {
      getppid_parent = OpenProcess (SYNCHRONIZE, FALSE, atoi(ppid));
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      if (!getppid_parent)
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	{
	  printf ("Failed to open handle to parent process: %d\n",
		 GetLastError());
	  exit (1);
	}
    }

  result = WaitForSingleObject (getppid_parent, 0);
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  switch (result)
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    {
    case WAIT_TIMEOUT:
      /* The parent is still alive.  */
      return getppid_ppid;
    case WAIT_OBJECT_0:
      /* The parent is gone.  Return the pid of Unix init (1).  */
      return 1;
    case WAIT_FAILED:
    default:
      printf ("Checking parent status failed: %d\n", GetLastError());
      exit (1);
    }
}
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char *
getlogin ()
{
  static char user_name[256];
  DWORD  length = sizeof (user_name);

  if (GetUserName (user_name, &length))
    return user_name;
  return NULL;
}

char *
cuserid (char * s)
{
  char * name = getlogin ();
  if (s)
    return strcpy (s, name ? name : "");
  return name;
}

int
getuid ()
{
  return 0;
}

int
setuid (int uid)
{
  return 0;
}

struct passwd *
getpwuid (int uid)
{
  return NULL;
}

char *
getpass (const char * prompt)
{
  static char input[256];
  HANDLE in;
  HANDLE err;
  DWORD  count;

  in = GetStdHandle (STD_INPUT_HANDLE);
  err = GetStdHandle (STD_ERROR_HANDLE);

  if (in == INVALID_HANDLE_VALUE || err == INVALID_HANDLE_VALUE)
    return NULL;

  if (WriteFile (err, prompt, strlen (prompt), &count, NULL))
    {
      int istty = (GetFileType (in) == FILE_TYPE_CHAR);
      DWORD old_flags;
      int rc;

      if (istty)
	{
	  if (GetConsoleMode (in, &old_flags))
	    SetConsoleMode (in, ENABLE_LINE_INPUT | ENABLE_PROCESSED_INPUT);
	  else
	    istty = 0;
	}
      rc = ReadFile (in, input, sizeof (input), &count, NULL);
      if (count >= 2 && input[count - 2] == '\r')
	input[count - 2] = '\0';
      else
	{
	  char buf[256];
	  while (ReadFile (in, buf, sizeof (buf), &count, NULL) > 0)
	    if (count >= 2 && buf[count - 2] == '\r')
	      break;
	}
      WriteFile (err, "\r\n", 2, &count, NULL);
      if (istty)
	SetConsoleMode (in, old_flags);
      if (rc)
	return input;
    }

  return NULL;
}

int
fchown (int fd, int uid, int gid)
{
  return 0;
}

/* Place a wrapper around the MSVC version of ctime.  It returns NULL
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   on network directories, so we handle that case here.
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   (Ulrich Leodolter, 1/11/95).  */
char *
sys_ctime (const time_t *t)
{
  char *str = (char *) ctime (t);
  return (str ? str : "Sun Jan 01 00:00:00 1970");
}

FILE *
sys_fopen(const char * path, const char * mode)
{
  return fopen (path, mode);
}

int
sys_chdir (const char * path)
{
  return _chdir (path);
}