2 * winmisc.c: miscellaneous Windows-specific things
10 OSVERSIONINFO osVersion
;
12 char *platform_get_x_display(void) {
13 /* We may as well check for DISPLAY in case it's useful. */
14 return dupstr(getenv("DISPLAY"));
17 Filename
*filename_from_str(const char *str
)
19 Filename
*ret
= snew(Filename
);
20 ret
->path
= dupstr(str
);
24 Filename
*filename_copy(const Filename
*fn
)
26 return filename_from_str(fn
->path
);
29 const char *filename_to_str(const Filename
*fn
)
34 int filename_equal(const Filename
*f1
, const Filename
*f2
)
36 return !strcmp(f1
->path
, f2
->path
);
39 int filename_is_null(const Filename
*fn
)
44 void filename_free(Filename
*fn
)
50 int filename_serialise(const Filename
*f
, void *vdata
)
52 char *data
= (char *)vdata
;
53 int len
= strlen(f
->path
) + 1; /* include trailing NUL */
55 strcpy(data
, f
->path
);
59 Filename
*filename_deserialise(void *vdata
, int maxsize
, int *used
)
61 char *data
= (char *)vdata
;
63 end
= memchr(data
, '\0', maxsize
);
68 return filename_from_str(data
);
71 #ifndef NO_SECUREZEROMEMORY
73 * Windows implementation of smemclr (see misc.c) using SecureZeroMemory.
75 void smemclr(void *b
, size_t n
) {
77 SecureZeroMemory(b
, n
);
81 char *get_username(void)
85 int got_username
= FALSE
;
86 DECL_WINDOWS_FUNCTION(static, BOOLEAN
, GetUserNameExA
,
87 (EXTENDED_NAME_FORMAT
, LPSTR
, PULONG
));
90 static int tried_usernameex
= FALSE
;
91 if (!tried_usernameex
) {
92 /* Not available on Win9x, so load dynamically */
93 HMODULE secur32
= load_system32_dll("secur32.dll");
94 GET_WINDOWS_FUNCTION(secur32
, GetUserNameExA
);
95 tried_usernameex
= TRUE
;
99 if (p_GetUserNameExA
) {
101 * If available, use the principal -- this avoids the problem
102 * that the local username is case-insensitive but Kerberos
103 * usernames are case-sensitive.
108 (void) p_GetUserNameExA(NameUserPrincipal
, NULL
, &namelen
);
110 user
= snewn(namelen
, char);
111 got_username
= p_GetUserNameExA(NameUserPrincipal
, user
, &namelen
);
113 char *p
= strchr(user
, '@');
121 /* Fall back to local user name */
123 if (GetUserName(NULL
, &namelen
) == FALSE
) {
125 * Apparently this doesn't work at least on Windows XP SP2.
126 * Thus assume a maximum of 256. It will fail again if it
132 user
= snewn(namelen
, char);
133 got_username
= GetUserName(user
, &namelen
);
139 return got_username ? user
: NULL
;
142 BOOL
init_winver(void)
144 ZeroMemory(&osVersion
, sizeof(osVersion
));
145 osVersion
.dwOSVersionInfoSize
= sizeof (OSVERSIONINFO
);
146 return GetVersionEx ( (OSVERSIONINFO
*) &osVersion
);
149 HMODULE
load_system32_dll(const char *libname
)
152 * Wrapper function to load a DLL out of c:\windows\system32
153 * without going through the full DLL search path. (Hence no
154 * attack is possible by placing a substitute DLL earlier on that
157 static char *sysdir
= NULL
;
164 size
= 3*size
/2 + 512;
165 sysdir
= sresize(sysdir
, size
, char);
166 len
= GetSystemDirectory(sysdir
, size
);
167 } while (len
>= size
);
170 fullpath
= dupcat(sysdir
, "\\", libname
, NULL
);
171 ret
= LoadLibrary(fullpath
);
177 * A tree234 containing mappings from system error codes to strings.
185 static int errstring_find(void *av
, void *bv
)
188 struct errstring
*b
= (struct errstring
*)bv
;
195 static int errstring_compare(void *av
, void *bv
)
197 struct errstring
*a
= (struct errstring
*)av
;
198 return errstring_find(&a
->error
, bv
);
201 static tree234
*errstrings
= NULL
;
203 const char *win_strerror(int error
)
205 struct errstring
*es
;
208 errstrings
= newtree234(errstring_compare
);
210 es
= find234(errstrings
, &error
, errstring_find
);
215 es
= snew(struct errstring
);
217 /* maximum size for FormatMessage is 64K */
219 es
->text
= snewn(bufsize
, char);
220 if (!FormatMessage((FORMAT_MESSAGE_FROM_SYSTEM
|
221 FORMAT_MESSAGE_IGNORE_INSERTS
), NULL
, error
,
222 MAKELANGID(LANG_NEUTRAL
, SUBLANG_DEFAULT
),
223 es
->text
, bufsize
, NULL
)) {
225 "Windows error code %d (and FormatMessage returned %d)",
226 error
, GetLastError());
228 int len
= strlen(es
->text
);
229 if (len
> 0 && es
->text
[len
-1] == '\n')
230 es
->text
[len
-1] = '\0';
232 es
->text
= sresize(es
->text
, strlen(es
->text
) + 1, char);
233 add234(errstrings
, es
);
240 static FILE *debug_fp
= NULL
;
241 static HANDLE debug_hdl
= INVALID_HANDLE_VALUE
;
242 static int debug_got_console
= 0;
244 void dputs(char *buf
)
248 if (!debug_got_console
) {
249 if (AllocConsole()) {
250 debug_got_console
= 1;
251 debug_hdl
= GetStdHandle(STD_OUTPUT_HANDLE
);
255 debug_fp
= fopen("debug.log", "w");
258 if (debug_hdl
!= INVALID_HANDLE_VALUE
) {
259 WriteFile(debug_hdl
, buf
, strlen(buf
), &dw
, NULL
);
261 fputs(buf
, debug_fp
);
268 * Minefield - a Windows equivalent for Electric Fence
271 #define PAGESIZE 4096
276 * We start by reserving as much virtual address space as Windows
277 * will sensibly (or not sensibly) let us have. We flag it all as
280 * Any allocation attempt is satisfied by committing one or more
281 * pages, with an uncommitted page on either side. The returned
282 * memory region is jammed up against the _end_ of the pages.
284 * Freeing anything causes instantaneous decommitment of the pages
285 * involved, so stale pointers are caught as soon as possible.
288 static int minefield_initialised
= 0;
289 static void *minefield_region
= NULL
;
290 static long minefield_size
= 0;
291 static long minefield_npages
= 0;
292 static long minefield_curpos
= 0;
293 static unsigned short *minefield_admin
= NULL
;
294 static void *minefield_pages
= NULL
;
296 static void minefield_admin_hide(int hide
)
298 int access
= hide ? PAGE_NOACCESS
: PAGE_READWRITE
;
299 VirtualProtect(minefield_admin
, minefield_npages
* 2, access
, NULL
);
302 static void minefield_init(void)
308 for (size
= 0x40000000; size
> 0; size
= ((size
>> 3) * 7) & ~0xFFF) {
309 minefield_region
= VirtualAlloc(NULL
, size
,
310 MEM_RESERVE
, PAGE_NOACCESS
);
311 if (minefield_region
)
314 minefield_size
= size
;
317 * Firstly, allocate a section of that to be the admin block.
318 * We'll need a two-byte field for each page.
320 minefield_admin
= minefield_region
;
321 minefield_npages
= minefield_size
/ PAGESIZE
;
322 admin_size
= (minefield_npages
* 2 + PAGESIZE
- 1) & ~(PAGESIZE
- 1);
323 minefield_npages
= (minefield_size
- admin_size
) / PAGESIZE
;
324 minefield_pages
= (char *) minefield_region
+ admin_size
;
327 * Commit the admin region.
329 VirtualAlloc(minefield_admin
, minefield_npages
* 2,
330 MEM_COMMIT
, PAGE_READWRITE
);
333 * Mark all pages as unused (0xFFFF).
335 for (i
= 0; i
< minefield_npages
; i
++)
336 minefield_admin
[i
] = 0xFFFF;
339 * Hide the admin region.
341 minefield_admin_hide(1);
343 minefield_initialised
= 1;
346 static void minefield_bomb(void)
348 div(1, *(int *) minefield_pages
);
351 static void *minefield_alloc(int size
)
354 int pos
, lim
, region_end
, region_start
;
358 npages
= (size
+ PAGESIZE
- 1) / PAGESIZE
;
360 minefield_admin_hide(0);
363 * Search from current position until we find a contiguous
364 * bunch of npages+2 unused pages.
366 pos
= minefield_curpos
;
367 lim
= minefield_npages
;
369 /* Skip over used pages. */
370 while (pos
< lim
&& minefield_admin
[pos
] != 0xFFFF)
372 /* Count unused pages. */
374 while (pos
< lim
&& pos
- start
< npages
+ 2 &&
375 minefield_admin
[pos
] == 0xFFFF)
377 if (pos
- start
== npages
+ 2)
379 /* If we've reached the limit, reset the limit or stop. */
381 if (lim
== minefield_npages
) {
382 /* go round and start again at zero */
383 lim
= minefield_curpos
;
386 minefield_admin_hide(1);
392 minefield_curpos
= pos
- 1;
395 * We have npages+2 unused pages starting at start. We leave
396 * the first and last of these alone and use the rest.
398 region_end
= (start
+ npages
+ 1) * PAGESIZE
;
399 region_start
= region_end
- size
;
400 /* FIXME: could align here if we wanted */
403 * Update the admin region.
405 for (i
= start
+ 2; i
< start
+ npages
+ 1; i
++)
406 minefield_admin
[i
] = 0xFFFE; /* used but no region starts here */
407 minefield_admin
[start
+ 1] = region_start
% PAGESIZE
;
409 minefield_admin_hide(1);
411 VirtualAlloc((char *) minefield_pages
+ region_start
, size
,
412 MEM_COMMIT
, PAGE_READWRITE
);
413 return (char *) minefield_pages
+ region_start
;
416 static void minefield_free(void *ptr
)
418 int region_start
, i
, j
;
420 minefield_admin_hide(0);
422 region_start
= (char *) ptr
- (char *) minefield_pages
;
423 i
= region_start
/ PAGESIZE
;
424 if (i
< 0 || i
>= minefield_npages
||
425 minefield_admin
[i
] != region_start
% PAGESIZE
)
427 for (j
= i
; j
< minefield_npages
&& minefield_admin
[j
] != 0xFFFF; j
++) {
428 minefield_admin
[j
] = 0xFFFF;
431 VirtualFree(ptr
, j
* PAGESIZE
- region_start
, MEM_DECOMMIT
);
433 minefield_admin_hide(1);
436 static int minefield_get_size(void *ptr
)
438 int region_start
, i
, j
;
440 minefield_admin_hide(0);
442 region_start
= (char *) ptr
- (char *) minefield_pages
;
443 i
= region_start
/ PAGESIZE
;
444 if (i
< 0 || i
>= minefield_npages
||
445 minefield_admin
[i
] != region_start
% PAGESIZE
)
447 for (j
= i
; j
< minefield_npages
&& minefield_admin
[j
] != 0xFFFF; j
++);
449 minefield_admin_hide(1);
451 return j
* PAGESIZE
- region_start
;
454 void *minefield_c_malloc(size_t size
)
456 if (!minefield_initialised
)
458 return minefield_alloc(size
);
461 void minefield_c_free(void *p
)
463 if (!minefield_initialised
)
469 * realloc _always_ moves the chunk, for rapid detection of code
470 * that assumes it won't.
472 void *minefield_c_realloc(void *p
, size_t size
)
476 if (!minefield_initialised
)
478 q
= minefield_alloc(size
);
479 oldsize
= minefield_get_size(p
);
480 memcpy(q
, p
, (oldsize
< size ? oldsize
: size
));
485 #endif /* MINEFIELD */
487 FontSpec
*fontspec_new(const char *name
,
488 int bold
, int height
, int charset
)
490 FontSpec
*f
= snew(FontSpec
);
491 f
->name
= dupstr(name
);
494 f
->charset
= charset
;
497 FontSpec
*fontspec_copy(const FontSpec
*f
)
499 return fontspec_new(f
->name
, f
->isbold
, f
->height
, f
->charset
);
501 void fontspec_free(FontSpec
*f
)
506 int fontspec_serialise(FontSpec
*f
, void *vdata
)
508 char *data
= (char *)vdata
;
509 int len
= strlen(f
->name
) + 1; /* include trailing NUL */
511 strcpy(data
, f
->name
);
512 PUT_32BIT_MSB_FIRST(data
+ len
, f
->isbold
);
513 PUT_32BIT_MSB_FIRST(data
+ len
+ 4, f
->height
);
514 PUT_32BIT_MSB_FIRST(data
+ len
+ 8, f
->charset
);
516 return len
+ 12; /* also include three 4-byte ints */
518 FontSpec
*fontspec_deserialise(void *vdata
, int maxsize
, int *used
)
520 char *data
= (char *)vdata
;
524 end
= memchr(data
, '\0', maxsize
-12);
528 *used
= end
- data
+ 12;
529 return fontspec_new(data
,
530 GET_32BIT_MSB_FIRST(end
),
531 GET_32BIT_MSB_FIRST(end
+ 4),
532 GET_32BIT_MSB_FIRST(end
+ 8));