ntlib.c 9 KB
Newer Older
Richard M. Stallman's avatar
Richard M. Stallman committed
1
/* Utility and Unix shadow routines for GNU Emacs support programs on NT.
Glenn Morris's avatar
Glenn Morris committed
2

3
Copyright (C) 1994, 2001-2013 Free Software Foundation, Inc.
Glenn Morris's avatar
Glenn Morris committed
4 5 6

Author: Geoff Voelker (voelker@cs.washington.edu)
Created: 10-8-94
Richard M. Stallman's avatar
Richard M. Stallman committed
7

8 9
This file is part of GNU Emacs.

10
GNU Emacs is free software: you can redistribute it and/or modify
11
it under the terms of the GNU General Public License as published by
12 13
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
14 15 16 17 18 19 20

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
Glenn Morris's avatar
Glenn Morris committed
21
along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
Richard M. Stallman's avatar
Richard M. Stallman committed
22 23 24 25

#include <windows.h>
#include <stdlib.h>
#include <stdio.h>
Geoff Voelker's avatar
Geoff Voelker committed
26 27
#include <time.h>
#include <direct.h>
28 29 30
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
31
#include <ctype.h>
32
#include <sys/timeb.h>
33
#include <mbstring.h>
Geoff Voelker's avatar
Geoff Voelker committed
34 35

#include "ntlib.h"
Richard M. Stallman's avatar
Richard M. Stallman committed
36

37 38 39
/* MinGW64 defines _TIMEZONE_DEFINED and defines 'struct timespec' in
   its system headers.  */
#ifndef _TIMEZONE_DEFINED
40 41 42 43 44
struct timezone
{
  int		tz_minuteswest;	/* minutes west of Greenwich */
  int		tz_dsttime;	/* type of dst correction */
};
45
#endif
46

Richard M. Stallman's avatar
Richard M. Stallman committed
47 48 49 50 51 52
#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
53
sleep (unsigned long seconds)
Richard M. Stallman's avatar
Richard M. Stallman committed
54 55 56 57 58
{
  Sleep (seconds * 1000);
}

/* Get the current working directory.  */
Karl Heuer's avatar
Karl Heuer committed
59
char *
Richard M. Stallman's avatar
Richard M. Stallman committed
60 61
getwd (char *dir)
{
Geoff Voelker's avatar
Geoff Voelker committed
62 63 64
  if (GetCurrentDirectory (MAXPATHLEN, dir) > 0)
    return dir;
  return NULL;
Richard M. Stallman's avatar
Richard M. Stallman committed
65 66 67 68 69 70
}

static HANDLE getppid_parent;
static int    getppid_ppid;

int
71
getppid (void)
Richard M. Stallman's avatar
Richard M. Stallman committed
72 73 74 75
{
  char *ppid;
  DWORD result;

76
  ppid = getenv ("EM_PARENT_PROCESS_ID");
77
  if (!ppid)
Richard M. Stallman's avatar
Richard M. Stallman committed
78
    {
79
      printf ("no pid.\n");
Richard M. Stallman's avatar
Richard M. Stallman committed
80
      return 0;
81 82
    }
  else
Richard M. Stallman's avatar
Richard M. Stallman committed
83 84 85 86
    {
      getppid_ppid = atoi (ppid);
    }

87
  if (!getppid_parent)
Richard M. Stallman's avatar
Richard M. Stallman committed
88
    {
89
      getppid_parent = OpenProcess (SYNCHRONIZE, FALSE, atoi (ppid));
90
      if (!getppid_parent)
Richard M. Stallman's avatar
Richard M. Stallman committed
91 92
	{
	  printf ("Failed to open handle to parent process: %d\n",
93
		 GetLastError ());
Richard M. Stallman's avatar
Richard M. Stallman committed
94 95 96 97 98
	  exit (1);
	}
    }

  result = WaitForSingleObject (getppid_parent, 0);
99
  switch (result)
Richard M. Stallman's avatar
Richard M. Stallman committed
100 101 102 103 104 105 106 107 108
    {
    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:
109
      printf ("Checking parent status failed: %d\n", GetLastError ());
Richard M. Stallman's avatar
Richard M. Stallman committed
110 111 112
      exit (1);
    }
}
Geoff Voelker's avatar
Geoff Voelker committed
113 114

char *
115
getlogin (void)
Geoff Voelker's avatar
Geoff Voelker committed
116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133
{
  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;
}

134
unsigned
135
getuid (void)
Geoff Voelker's avatar
Geoff Voelker committed
136 137 138 139
{
  return 0;
}

140
unsigned
141
getgid (void)
142 143 144 145 146
{
  return 0;
}

unsigned
147
getegid (void)
148 149 150 151
{
  return 0;
}

Geoff Voelker's avatar
Geoff Voelker committed
152
int
153
setuid (unsigned uid)
Geoff Voelker's avatar
Geoff Voelker committed
154 155 156 157
{
  return 0;
}

158
int
159
setregid (unsigned rgid, unsigned gid)
160 161 162 163
{
  return 0;
}

Geoff Voelker's avatar
Geoff Voelker committed
164
struct passwd *
165
getpwuid (unsigned uid)
Geoff Voelker's avatar
Geoff Voelker committed
166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216
{
  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;
}

217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239
/* This is needed because lib/gettime.c calls gettimeofday, which MSVC
   doesn't have.  Copied from w32.c.  */
void
gettimeofday (struct timeval *tv, struct timezone *tz)
{
  struct _timeb tb;
  _ftime (&tb);

  tv->tv_sec = tb.time;
  tv->tv_usec = tb.millitm * 1000L;
  /* Implementation note: _ftime sometimes doesn't update the dstflag
     according to the new timezone when the system timezone is
     changed.  We could fix that by using GetSystemTime and
     GetTimeZoneInformation, but that doesn't seem necessary, since
     Emacs always calls gettimeofday with the 2nd argument NULL (see
     current_emacs_time).  */
  if (tz)
    {
      tz->tz_minuteswest = tb.timezone;	/* minutes west of Greenwich  */
      tz->tz_dsttime = tb.dstflag;	/* type of dst correction  */
    }
}

Geoff Voelker's avatar
Geoff Voelker committed
240
int
241
fchown (int fd, unsigned uid, unsigned gid)
Geoff Voelker's avatar
Geoff Voelker committed
242 243 244 245 246
{
  return 0;
}

/* Place a wrapper around the MSVC version of ctime.  It returns NULL
247
   on network directories, so we handle that case here.
Geoff Voelker's avatar
Geoff Voelker committed
248 249 250 251 252 253 254 255 256
   (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 *
257
sys_fopen (const char * path, const char * mode)
Geoff Voelker's avatar
Geoff Voelker committed
258 259 260 261 262 263 264 265 266
{
  return fopen (path, mode);
}

int
sys_chdir (const char * path)
{
  return _chdir (path);
}
Miles Bader's avatar
Miles Bader committed
267

268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297
static FILETIME utc_base_ft;
static long double utc_base;
static int init = 0;

static time_t
convert_time (FILETIME ft)
{
  long double ret;

  if (CompareFileTime (&ft, &utc_base_ft) < 0)
    return 0;

  ret = (long double) ft.dwHighDateTime
    * 4096.0L * 1024.0L * 1024.0L + ft.dwLowDateTime;
  ret -= utc_base;
  return (time_t) (ret * 1e-7L);
}

static int
is_exec (const char * name)
{
  char * p = strrchr (name, '.');
  return
    (p != NULL
     && (stricmp (p, ".exe") == 0 ||
	 stricmp (p, ".com") == 0 ||
	 stricmp (p, ".bat") == 0 ||
	 stricmp (p, ".cmd") == 0));
}

Glenn Morris's avatar
Glenn Morris committed
298
/* FIXME?  This is in config.nt now - is this still needed?  */
299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412
#define IS_DIRECTORY_SEP(x) ((x) == '/' || (x) == '\\')

/* We need this because nt/inc/sys/stat.h defines struct stat that is
   incompatible with the MS run-time libraries.  */
int
stat (const char * path, struct stat * buf)
{
  WIN32_FIND_DATA wfd;
  HANDLE fh;
  int permission;
  int len;
  int rootdir = FALSE;
  char *name = alloca (FILENAME_MAX);

  if (!init)
    {
      /* Determine the delta between 1-Jan-1601 and 1-Jan-1970. */
      SYSTEMTIME st;

      st.wYear = 1970;
      st.wMonth = 1;
      st.wDay = 1;
      st.wHour = 0;
      st.wMinute = 0;
      st.wSecond = 0;
      st.wMilliseconds = 0;

      SystemTimeToFileTime (&st, &utc_base_ft);
      utc_base = (long double) utc_base_ft.dwHighDateTime
	* 4096.0L * 1024.0L * 1024.0L + utc_base_ft.dwLowDateTime;
      init = 1;
    }

  if (path == NULL || buf == NULL || *path == '\0')
    {
      errno = EFAULT;
      return -1;
    }
  if (_mbspbrk (path, "*?|<>\""))
    {
      errno = ENOENT;
      return -1;
    }

  strcpy (name, path);
  /* Remove trailing directory separator, unless name is the root
     directory of a drive in which case ensure there is a trailing
     separator. */
  len = strlen (name);
  rootdir = IS_DIRECTORY_SEP (name[0])
    || (len == 3 && name[1] == ':' && IS_DIRECTORY_SEP (name[2]));
  if (rootdir)
    {
      if (GetDriveType (name) < 2)
	{
	  errno = ENOENT;
	  return -1;
	}
      memset (&wfd, 0, sizeof (wfd));
      wfd.dwFileAttributes = FILE_ATTRIBUTE_DIRECTORY;
      wfd.ftCreationTime = utc_base_ft;
      wfd.ftLastAccessTime = utc_base_ft;
      wfd.ftLastWriteTime = utc_base_ft;
      strcpy (wfd.cFileName, name);
    }
  else
    {
      if (IS_DIRECTORY_SEP (name[len-1]))
	name[len - 1] = 0;

      fh = FindFirstFile (name, &wfd);
      if (fh == INVALID_HANDLE_VALUE)
	{
	  errno = ENOENT;
	  return -1;
	}
      FindClose (fh);
    }
  buf->st_mode = (wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) ?
    S_IFDIR : S_IFREG;
  buf->st_nlink = 1;
  buf->st_ino = 0;

  if (name[0] && name[1] == ':')
    buf->st_dev = tolower (name[0]) - 'a' + 1;
  else
    buf->st_dev = _getdrive ();
  buf->st_rdev = buf->st_dev;

  buf->st_size = wfd.nFileSizeLow;

  /* Convert timestamps to Unix format. */
  buf->st_mtime = convert_time (wfd.ftLastWriteTime);
  buf->st_atime = convert_time (wfd.ftLastAccessTime);
  if (buf->st_atime == 0) buf->st_atime = buf->st_mtime;
  buf->st_ctime = convert_time (wfd.ftCreationTime);
  if (buf->st_ctime == 0) buf->st_ctime = buf->st_mtime;

  /* determine rwx permissions */
  if (wfd.dwFileAttributes & FILE_ATTRIBUTE_READONLY)
    permission = S_IREAD;
  else
    permission = S_IREAD | S_IWRITE;

  if (wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
    permission |= S_IEXEC;
  else if (is_exec (name))
    permission |= S_IEXEC;

  buf->st_mode |= permission | (permission >> 3) | (permission >> 6);

  return 0;
}

413 414 415 416 417 418
int
lstat (const char * path, struct stat * buf)
{
  return stat (path, buf);
}