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30681738 RD |
1 | ------------------------------------------------------------------------------ |
2 | -- -- | |
3 | -- GNAT COMPILER COMPONENTS -- | |
4 | -- -- | |
5 | -- S Y S T E M . O S _ L I B -- | |
6 | -- -- | |
7 | -- B o d y -- | |
8 | -- -- | |
43c6e0cb | 9 | -- Copyright (C) 1995-2008, AdaCore -- |
30681738 RD |
10 | -- -- |
11 | -- GNAT is free software; you can redistribute it and/or modify it under -- | |
12 | -- terms of the GNU General Public License as published by the Free Soft- -- | |
13 | -- ware Foundation; either version 2, or (at your option) any later ver- -- | |
14 | -- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- | |
15 | -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- | |
16 | -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -- | |
17 | -- for more details. You should have received a copy of the GNU General -- | |
18 | -- Public License distributed with GNAT; see file COPYING. If not, write -- | |
19 | -- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, -- | |
20 | -- Boston, MA 02110-1301, USA. -- | |
21 | -- -- | |
22 | -- As a special exception, if other files instantiate generics from this -- | |
23 | -- unit, or you link this unit with other files to produce an executable, -- | |
24 | -- this unit does not by itself cause the resulting executable to be -- | |
25 | -- covered by the GNU General Public License. This exception does not -- | |
26 | -- however invalidate any other reasons why the executable file might be -- | |
27 | -- covered by the GNU Public License. -- | |
28 | -- -- | |
29 | -- GNAT was originally developed by the GNAT team at New York University. -- | |
30 | -- Extensive contributions were provided by Ada Core Technologies Inc. -- | |
31 | -- -- | |
32 | ------------------------------------------------------------------------------ | |
33 | ||
2d9ea47f RD |
34 | pragma Warnings (Off); |
35 | pragma Compiler_Unit; | |
36 | pragma Warnings (On); | |
37 | ||
30681738 RD |
38 | with System.Case_Util; |
39 | with System.CRTL; | |
40 | with System.Soft_Links; | |
41 | with Ada.Unchecked_Conversion; | |
42 | with Ada.Unchecked_Deallocation; | |
43 | with System; use System; | |
44 | ||
45 | package body System.OS_Lib is | |
46 | ||
47 | -- Imported procedures Dup and Dup2 are used in procedures Spawn and | |
48 | -- Non_Blocking_Spawn. | |
49 | ||
50 | function Dup (Fd : File_Descriptor) return File_Descriptor; | |
51 | pragma Import (C, Dup, "__gnat_dup"); | |
52 | ||
53 | procedure Dup2 (Old_Fd, New_Fd : File_Descriptor); | |
54 | pragma Import (C, Dup2, "__gnat_dup2"); | |
55 | ||
56 | On_Windows : constant Boolean := Directory_Separator = '\'; | |
57 | -- An indication that we are on Windows. Used in Normalize_Pathname, to | |
58 | -- deal with drive letters in the beginning of absolute paths. | |
59 | ||
60 | package SSL renames System.Soft_Links; | |
61 | ||
62 | -- The following are used by Create_Temp_File | |
63 | ||
64 | First_Temp_File_Name : constant String := "GNAT-TEMP-000000.TMP"; | |
65 | -- Used to initialize Current_Temp_File_Name and Temp_File_Name_Last_Digit | |
66 | ||
67 | Current_Temp_File_Name : String := First_Temp_File_Name; | |
68 | -- Name of the temp file last created | |
69 | ||
70 | Temp_File_Name_Last_Digit : constant Positive := | |
71 | First_Temp_File_Name'Last - 4; | |
72 | -- Position of the last digit in Current_Temp_File_Name | |
73 | ||
74 | Max_Attempts : constant := 100; | |
75 | -- The maximum number of attempts to create a new temp file | |
76 | ||
77 | ----------------------- | |
78 | -- Local Subprograms -- | |
79 | ----------------------- | |
80 | ||
81 | function Args_Length (Args : Argument_List) return Natural; | |
82 | -- Returns total number of characters needed to create a string | |
83 | -- of all Args terminated by ASCII.NUL characters | |
84 | ||
85 | function C_String_Length (S : Address) return Integer; | |
86 | -- Returns the length of a C string. Does check for null address | |
87 | -- (returns 0). | |
88 | ||
89 | procedure Spawn_Internal | |
90 | (Program_Name : String; | |
91 | Args : Argument_List; | |
92 | Result : out Integer; | |
93 | Pid : out Process_Id; | |
94 | Blocking : Boolean); | |
95 | -- Internal routine to implement the two Spawn (blocking/non blocking) | |
96 | -- routines. If Blocking is set to True then the spawn is blocking | |
97 | -- otherwise it is non blocking. In this latter case the Pid contains the | |
98 | -- process id number. The first three parameters are as in Spawn. Note that | |
99 | -- Spawn_Internal normalizes the argument list before calling the low level | |
100 | -- system spawn routines (see Normalize_Arguments). | |
101 | -- | |
102 | -- Note: Normalize_Arguments is designed to do nothing if it is called more | |
103 | -- than once, so calling Normalize_Arguments before calling one of the | |
104 | -- spawn routines is fine. | |
105 | ||
106 | function To_Path_String_Access | |
107 | (Path_Addr : Address; | |
108 | Path_Len : Integer) return String_Access; | |
109 | -- Converts a C String to an Ada String. We could do this making use of | |
110 | -- Interfaces.C.Strings but we prefer not to import that entire package | |
111 | ||
112 | --------- | |
113 | -- "<" -- | |
114 | --------- | |
115 | ||
116 | function "<" (X, Y : OS_Time) return Boolean is | |
117 | begin | |
118 | return Long_Integer (X) < Long_Integer (Y); | |
119 | end "<"; | |
120 | ||
121 | ---------- | |
122 | -- "<=" -- | |
123 | ---------- | |
124 | ||
125 | function "<=" (X, Y : OS_Time) return Boolean is | |
126 | begin | |
127 | return Long_Integer (X) <= Long_Integer (Y); | |
128 | end "<="; | |
129 | ||
130 | --------- | |
131 | -- ">" -- | |
132 | --------- | |
133 | ||
134 | function ">" (X, Y : OS_Time) return Boolean is | |
135 | begin | |
136 | return Long_Integer (X) > Long_Integer (Y); | |
137 | end ">"; | |
138 | ||
139 | ---------- | |
140 | -- ">=" -- | |
141 | ---------- | |
142 | ||
143 | function ">=" (X, Y : OS_Time) return Boolean is | |
144 | begin | |
145 | return Long_Integer (X) >= Long_Integer (Y); | |
146 | end ">="; | |
147 | ||
148 | ----------------- | |
149 | -- Args_Length -- | |
150 | ----------------- | |
151 | ||
152 | function Args_Length (Args : Argument_List) return Natural is | |
153 | Len : Natural := 0; | |
154 | ||
155 | begin | |
156 | for J in Args'Range loop | |
157 | Len := Len + Args (J)'Length + 1; -- One extra for ASCII.NUL | |
158 | end loop; | |
159 | ||
160 | return Len; | |
161 | end Args_Length; | |
162 | ||
163 | ----------------------------- | |
164 | -- Argument_String_To_List -- | |
165 | ----------------------------- | |
166 | ||
167 | function Argument_String_To_List | |
168 | (Arg_String : String) return Argument_List_Access | |
169 | is | |
170 | Max_Args : constant Integer := Arg_String'Length; | |
171 | New_Argv : Argument_List (1 .. Max_Args); | |
172 | New_Argc : Natural := 0; | |
173 | Idx : Integer; | |
174 | ||
175 | begin | |
176 | Idx := Arg_String'First; | |
177 | ||
178 | loop | |
179 | exit when Idx > Arg_String'Last; | |
180 | ||
181 | declare | |
182 | Quoted : Boolean := False; | |
183 | Backqd : Boolean := False; | |
184 | Old_Idx : Integer; | |
185 | ||
186 | begin | |
187 | Old_Idx := Idx; | |
188 | ||
189 | loop | |
190 | -- An unquoted space is the end of an argument | |
191 | ||
192 | if not (Backqd or Quoted) | |
193 | and then Arg_String (Idx) = ' ' | |
194 | then | |
195 | exit; | |
196 | ||
197 | -- Start of a quoted string | |
198 | ||
199 | elsif not (Backqd or Quoted) | |
200 | and then Arg_String (Idx) = '"' | |
201 | then | |
202 | Quoted := True; | |
203 | ||
204 | -- End of a quoted string and end of an argument | |
205 | ||
206 | elsif (Quoted and not Backqd) | |
207 | and then Arg_String (Idx) = '"' | |
208 | then | |
209 | Idx := Idx + 1; | |
210 | exit; | |
211 | ||
212 | -- Following character is backquoted | |
213 | ||
214 | elsif Arg_String (Idx) = '\' then | |
215 | Backqd := True; | |
216 | ||
217 | -- Turn off backquoting after advancing one character | |
218 | ||
219 | elsif Backqd then | |
220 | Backqd := False; | |
221 | ||
222 | end if; | |
223 | ||
224 | Idx := Idx + 1; | |
225 | exit when Idx > Arg_String'Last; | |
226 | end loop; | |
227 | ||
228 | -- Found an argument | |
229 | ||
230 | New_Argc := New_Argc + 1; | |
231 | New_Argv (New_Argc) := | |
232 | new String'(Arg_String (Old_Idx .. Idx - 1)); | |
233 | ||
234 | -- Skip extraneous spaces | |
235 | ||
236 | while Idx <= Arg_String'Last and then Arg_String (Idx) = ' ' loop | |
237 | Idx := Idx + 1; | |
238 | end loop; | |
239 | end; | |
240 | end loop; | |
241 | ||
242 | return new Argument_List'(New_Argv (1 .. New_Argc)); | |
243 | end Argument_String_To_List; | |
244 | ||
245 | --------------------- | |
246 | -- C_String_Length -- | |
247 | --------------------- | |
248 | ||
249 | function C_String_Length (S : Address) return Integer is | |
250 | function Strlen (S : Address) return Integer; | |
251 | pragma Import (C, Strlen, "strlen"); | |
252 | begin | |
253 | if S = Null_Address then | |
254 | return 0; | |
255 | else | |
256 | return Strlen (S); | |
257 | end if; | |
258 | end C_String_Length; | |
259 | ||
260 | ----------- | |
261 | -- Close -- | |
262 | ----------- | |
263 | ||
264 | procedure Close (FD : File_Descriptor) is | |
265 | procedure C_Close (FD : File_Descriptor); | |
266 | pragma Import (C, C_Close, "close"); | |
267 | begin | |
268 | C_Close (FD); | |
269 | end Close; | |
270 | ||
271 | procedure Close (FD : File_Descriptor; Status : out Boolean) is | |
272 | function C_Close (FD : File_Descriptor) return Integer; | |
273 | pragma Import (C, C_Close, "close"); | |
274 | begin | |
275 | Status := (C_Close (FD) = 0); | |
276 | end Close; | |
277 | ||
278 | --------------- | |
279 | -- Copy_File -- | |
280 | --------------- | |
281 | ||
282 | procedure Copy_File | |
283 | (Name : String; | |
284 | Pathname : String; | |
285 | Success : out Boolean; | |
286 | Mode : Copy_Mode := Copy; | |
287 | Preserve : Attribute := Time_Stamps) | |
288 | is | |
289 | From : File_Descriptor; | |
290 | To : File_Descriptor; | |
291 | ||
292 | Copy_Error : exception; | |
293 | -- Internal exception raised to signal error in copy | |
294 | ||
295 | function Build_Path (Dir : String; File : String) return String; | |
276e95ca | 296 | -- Returns pathname Dir concatenated with File adding the directory |
30681738 RD |
297 | -- separator only if needed. |
298 | ||
299 | procedure Copy (From, To : File_Descriptor); | |
300 | -- Read data from From and place them into To. In both cases the | |
301 | -- operations uses the current file position. Raises Constraint_Error | |
302 | -- if a problem occurs during the copy. | |
303 | ||
304 | procedure Copy_To (To_Name : String); | |
305 | -- Does a straight copy from source to designated destination file | |
306 | ||
307 | ---------------- | |
308 | -- Build_Path -- | |
309 | ---------------- | |
310 | ||
311 | function Build_Path (Dir : String; File : String) return String is | |
312 | Res : String (1 .. Dir'Length + File'Length + 1); | |
313 | ||
314 | Base_File_Ptr : Integer; | |
315 | -- The base file name is File (Base_File_Ptr + 1 .. File'Last) | |
316 | ||
317 | function Is_Dirsep (C : Character) return Boolean; | |
318 | pragma Inline (Is_Dirsep); | |
319 | -- Returns True if C is a directory separator. On Windows we | |
320 | -- handle both styles of directory separator. | |
321 | ||
322 | --------------- | |
323 | -- Is_Dirsep -- | |
324 | --------------- | |
325 | ||
326 | function Is_Dirsep (C : Character) return Boolean is | |
327 | begin | |
328 | return C = Directory_Separator or else C = '/'; | |
329 | end Is_Dirsep; | |
330 | ||
331 | -- Start of processing for Build_Path | |
332 | ||
333 | begin | |
334 | -- Find base file name | |
335 | ||
336 | Base_File_Ptr := File'Last; | |
337 | while Base_File_Ptr >= File'First loop | |
338 | exit when Is_Dirsep (File (Base_File_Ptr)); | |
339 | Base_File_Ptr := Base_File_Ptr - 1; | |
340 | end loop; | |
341 | ||
342 | declare | |
343 | Base_File : String renames | |
344 | File (Base_File_Ptr + 1 .. File'Last); | |
345 | ||
346 | begin | |
347 | Res (1 .. Dir'Length) := Dir; | |
348 | ||
349 | if Is_Dirsep (Dir (Dir'Last)) then | |
350 | Res (Dir'Length + 1 .. Dir'Length + Base_File'Length) := | |
351 | Base_File; | |
352 | return Res (1 .. Dir'Length + Base_File'Length); | |
353 | ||
354 | else | |
355 | Res (Dir'Length + 1) := Directory_Separator; | |
356 | Res (Dir'Length + 2 .. Dir'Length + 1 + Base_File'Length) := | |
357 | Base_File; | |
358 | return Res (1 .. Dir'Length + 1 + Base_File'Length); | |
359 | end if; | |
360 | end; | |
361 | end Build_Path; | |
362 | ||
363 | ---------- | |
364 | -- Copy -- | |
365 | ---------- | |
366 | ||
367 | procedure Copy (From, To : File_Descriptor) is | |
368 | Buf_Size : constant := 200_000; | |
369 | type Buf is array (1 .. Buf_Size) of Character; | |
370 | type Buf_Ptr is access Buf; | |
371 | ||
372 | Buffer : Buf_Ptr; | |
373 | R : Integer; | |
374 | W : Integer; | |
375 | ||
376 | Status_From : Boolean; | |
377 | Status_To : Boolean; | |
378 | -- Statuses for the calls to Close | |
379 | ||
380 | procedure Free is new Ada.Unchecked_Deallocation (Buf, Buf_Ptr); | |
381 | ||
382 | begin | |
383 | -- Check for invalid descriptors, making sure that we do not | |
384 | -- accidentally leave an open file descriptor around. | |
385 | ||
386 | if From = Invalid_FD then | |
387 | if To /= Invalid_FD then | |
388 | Close (To, Status_To); | |
389 | end if; | |
390 | ||
391 | raise Copy_Error; | |
392 | ||
393 | elsif To = Invalid_FD then | |
394 | Close (From, Status_From); | |
395 | raise Copy_Error; | |
396 | end if; | |
397 | ||
398 | -- Allocate the buffer on the heap | |
399 | ||
400 | Buffer := new Buf; | |
401 | ||
402 | loop | |
403 | R := Read (From, Buffer (1)'Address, Buf_Size); | |
404 | ||
405 | -- For VMS, the buffer may not be full. So, we need to try again | |
406 | -- until there is nothing to read. | |
407 | ||
408 | exit when R = 0; | |
409 | ||
410 | W := Write (To, Buffer (1)'Address, R); | |
411 | ||
412 | if W < R then | |
413 | ||
414 | -- Problem writing data, could be a disk full. Close files | |
415 | -- without worrying about status, since we are raising a | |
416 | -- Copy_Error exception in any case. | |
417 | ||
418 | Close (From, Status_From); | |
419 | Close (To, Status_To); | |
420 | ||
421 | Free (Buffer); | |
422 | ||
423 | raise Copy_Error; | |
424 | end if; | |
425 | end loop; | |
426 | ||
427 | Close (From, Status_From); | |
428 | Close (To, Status_To); | |
429 | ||
430 | Free (Buffer); | |
431 | ||
432 | if not (Status_From and Status_To) then | |
433 | raise Copy_Error; | |
434 | end if; | |
435 | end Copy; | |
436 | ||
437 | ------------- | |
438 | -- Copy_To -- | |
439 | ------------- | |
440 | ||
441 | procedure Copy_To (To_Name : String) is | |
442 | ||
443 | function Copy_Attributes | |
444 | (From, To : System.Address; | |
445 | Mode : Integer) return Integer; | |
446 | pragma Import (C, Copy_Attributes, "__gnat_copy_attribs"); | |
447 | -- Mode = 0 - copy only time stamps. | |
448 | -- Mode = 1 - copy time stamps and read/write/execute attributes | |
449 | ||
450 | C_From : String (1 .. Name'Length + 1); | |
451 | C_To : String (1 .. To_Name'Length + 1); | |
452 | ||
453 | begin | |
454 | From := Open_Read (Name, Binary); | |
e401e17b TQ |
455 | |
456 | -- Do not clobber destination file if source file could not be opened | |
457 | ||
458 | if From /= Invalid_FD then | |
459 | To := Create_File (To_Name, Binary); | |
460 | end if; | |
461 | ||
30681738 RD |
462 | Copy (From, To); |
463 | ||
464 | -- Copy attributes | |
465 | ||
466 | C_From (1 .. Name'Length) := Name; | |
43c6e0cb | 467 | C_From (C_From'Last) := ASCII.NUL; |
30681738 RD |
468 | |
469 | C_To (1 .. To_Name'Length) := To_Name; | |
43c6e0cb | 470 | C_To (C_To'Last) := ASCII.NUL; |
30681738 RD |
471 | |
472 | case Preserve is | |
473 | ||
474 | when Time_Stamps => | |
475 | if Copy_Attributes (C_From'Address, C_To'Address, 0) = -1 then | |
476 | raise Copy_Error; | |
477 | end if; | |
478 | ||
479 | when Full => | |
480 | if Copy_Attributes (C_From'Address, C_To'Address, 1) = -1 then | |
481 | raise Copy_Error; | |
482 | end if; | |
483 | ||
484 | when None => | |
485 | null; | |
486 | end case; | |
487 | ||
488 | end Copy_To; | |
489 | ||
490 | -- Start of processing for Copy_File | |
491 | ||
492 | begin | |
493 | Success := True; | |
494 | ||
495 | -- The source file must exist | |
496 | ||
497 | if not Is_Regular_File (Name) then | |
498 | raise Copy_Error; | |
499 | end if; | |
500 | ||
501 | -- The source file exists | |
502 | ||
503 | case Mode is | |
504 | ||
505 | -- Copy case, target file must not exist | |
506 | ||
507 | when Copy => | |
508 | ||
509 | -- If the target file exists, we have an error | |
510 | ||
511 | if Is_Regular_File (Pathname) then | |
512 | raise Copy_Error; | |
513 | ||
514 | -- Case of target is a directory | |
515 | ||
516 | elsif Is_Directory (Pathname) then | |
517 | declare | |
518 | Dest : constant String := Build_Path (Pathname, Name); | |
519 | ||
520 | begin | |
521 | -- If target file exists, we have an error, else do copy | |
522 | ||
523 | if Is_Regular_File (Dest) then | |
524 | raise Copy_Error; | |
525 | else | |
526 | Copy_To (Dest); | |
527 | end if; | |
528 | end; | |
529 | ||
530 | -- Case of normal copy to file (destination does not exist) | |
531 | ||
532 | else | |
533 | Copy_To (Pathname); | |
534 | end if; | |
535 | ||
536 | -- Overwrite case (destination file may or may not exist) | |
537 | ||
538 | when Overwrite => | |
539 | if Is_Directory (Pathname) then | |
540 | Copy_To (Build_Path (Pathname, Name)); | |
541 | else | |
542 | Copy_To (Pathname); | |
543 | end if; | |
544 | ||
545 | -- Append case (destination file may or may not exist) | |
546 | ||
547 | when Append => | |
548 | ||
549 | -- Appending to existing file | |
550 | ||
551 | if Is_Regular_File (Pathname) then | |
552 | ||
553 | -- Append mode and destination file exists, append data at the | |
e401e17b TQ |
554 | -- end of Pathname. But if we fail to open source file, do not |
555 | -- touch destination file at all. | |
30681738 RD |
556 | |
557 | From := Open_Read (Name, Binary); | |
e401e17b TQ |
558 | if From /= Invalid_FD then |
559 | To := Open_Read_Write (Pathname, Binary); | |
560 | end if; | |
561 | ||
30681738 RD |
562 | Lseek (To, 0, Seek_End); |
563 | ||
564 | Copy (From, To); | |
565 | ||
566 | -- Appending to directory, not allowed | |
567 | ||
568 | elsif Is_Directory (Pathname) then | |
569 | raise Copy_Error; | |
570 | ||
571 | -- Appending when target file does not exist | |
572 | ||
573 | else | |
574 | Copy_To (Pathname); | |
575 | end if; | |
576 | end case; | |
577 | ||
578 | -- All error cases are caught here | |
579 | ||
580 | exception | |
581 | when Copy_Error => | |
582 | Success := False; | |
583 | end Copy_File; | |
584 | ||
585 | procedure Copy_File | |
586 | (Name : C_File_Name; | |
587 | Pathname : C_File_Name; | |
588 | Success : out Boolean; | |
589 | Mode : Copy_Mode := Copy; | |
590 | Preserve : Attribute := Time_Stamps) | |
591 | is | |
8b79ad42 AC |
592 | Ada_Name : String_Access := |
593 | To_Path_String_Access | |
594 | (Name, C_String_Length (Name)); | |
30681738 RD |
595 | Ada_Pathname : String_Access := |
596 | To_Path_String_Access | |
597 | (Pathname, C_String_Length (Pathname)); | |
30681738 RD |
598 | begin |
599 | Copy_File (Ada_Name.all, Ada_Pathname.all, Success, Mode, Preserve); | |
600 | Free (Ada_Name); | |
601 | Free (Ada_Pathname); | |
602 | end Copy_File; | |
603 | ||
604 | ---------------------- | |
605 | -- Copy_Time_Stamps -- | |
606 | ---------------------- | |
607 | ||
608 | procedure Copy_Time_Stamps (Source, Dest : String; Success : out Boolean) is | |
609 | ||
610 | function Copy_Attributes | |
611 | (From, To : System.Address; | |
612 | Mode : Integer) return Integer; | |
613 | pragma Import (C, Copy_Attributes, "__gnat_copy_attribs"); | |
614 | -- Mode = 0 - copy only time stamps. | |
615 | -- Mode = 1 - copy time stamps and read/write/execute attributes | |
616 | ||
617 | begin | |
618 | if Is_Regular_File (Source) and then Is_Writable_File (Dest) then | |
619 | declare | |
620 | C_Source : String (1 .. Source'Length + 1); | |
621 | C_Dest : String (1 .. Dest'Length + 1); | |
d61f428e | 622 | |
30681738 RD |
623 | begin |
624 | C_Source (1 .. Source'Length) := Source; | |
625 | C_Source (C_Source'Last) := ASCII.NUL; | |
626 | ||
627 | C_Dest (1 .. Dest'Length) := Dest; | |
628 | C_Dest (C_Dest'Last) := ASCII.NUL; | |
629 | ||
630 | if Copy_Attributes (C_Source'Address, C_Dest'Address, 0) = -1 then | |
631 | Success := False; | |
632 | else | |
633 | Success := True; | |
634 | end if; | |
635 | end; | |
636 | ||
637 | else | |
638 | Success := False; | |
639 | end if; | |
640 | end Copy_Time_Stamps; | |
641 | ||
642 | procedure Copy_Time_Stamps | |
643 | (Source, Dest : C_File_Name; | |
644 | Success : out Boolean) | |
645 | is | |
646 | Ada_Source : String_Access := | |
647 | To_Path_String_Access | |
648 | (Source, C_String_Length (Source)); | |
8b79ad42 AC |
649 | Ada_Dest : String_Access := |
650 | To_Path_String_Access | |
651 | (Dest, C_String_Length (Dest)); | |
30681738 RD |
652 | begin |
653 | Copy_Time_Stamps (Ada_Source.all, Ada_Dest.all, Success); | |
654 | Free (Ada_Source); | |
655 | Free (Ada_Dest); | |
656 | end Copy_Time_Stamps; | |
657 | ||
658 | ----------------- | |
659 | -- Create_File -- | |
660 | ----------------- | |
661 | ||
662 | function Create_File | |
663 | (Name : C_File_Name; | |
664 | Fmode : Mode) return File_Descriptor | |
665 | is | |
666 | function C_Create_File | |
667 | (Name : C_File_Name; | |
668 | Fmode : Mode) return File_Descriptor; | |
669 | pragma Import (C, C_Create_File, "__gnat_open_create"); | |
670 | ||
671 | begin | |
672 | return C_Create_File (Name, Fmode); | |
673 | end Create_File; | |
674 | ||
675 | function Create_File | |
676 | (Name : String; | |
677 | Fmode : Mode) return File_Descriptor | |
678 | is | |
679 | C_Name : String (1 .. Name'Length + 1); | |
680 | ||
681 | begin | |
682 | C_Name (1 .. Name'Length) := Name; | |
683 | C_Name (C_Name'Last) := ASCII.NUL; | |
684 | return Create_File (C_Name (C_Name'First)'Address, Fmode); | |
685 | end Create_File; | |
686 | ||
687 | --------------------- | |
688 | -- Create_New_File -- | |
689 | --------------------- | |
690 | ||
691 | function Create_New_File | |
692 | (Name : C_File_Name; | |
693 | Fmode : Mode) return File_Descriptor | |
694 | is | |
695 | function C_Create_New_File | |
696 | (Name : C_File_Name; | |
697 | Fmode : Mode) return File_Descriptor; | |
698 | pragma Import (C, C_Create_New_File, "__gnat_open_new"); | |
699 | ||
700 | begin | |
701 | return C_Create_New_File (Name, Fmode); | |
702 | end Create_New_File; | |
703 | ||
704 | function Create_New_File | |
705 | (Name : String; | |
706 | Fmode : Mode) return File_Descriptor | |
707 | is | |
708 | C_Name : String (1 .. Name'Length + 1); | |
709 | ||
710 | begin | |
711 | C_Name (1 .. Name'Length) := Name; | |
712 | C_Name (C_Name'Last) := ASCII.NUL; | |
713 | return Create_New_File (C_Name (C_Name'First)'Address, Fmode); | |
714 | end Create_New_File; | |
715 | ||
716 | ----------------------------- | |
717 | -- Create_Output_Text_File -- | |
718 | ----------------------------- | |
719 | ||
720 | function Create_Output_Text_File (Name : String) return File_Descriptor is | |
721 | function C_Create_File | |
722 | (Name : C_File_Name) return File_Descriptor; | |
723 | pragma Import (C, C_Create_File, "__gnat_create_output_file"); | |
724 | ||
725 | C_Name : String (1 .. Name'Length + 1); | |
726 | ||
727 | begin | |
728 | C_Name (1 .. Name'Length) := Name; | |
729 | C_Name (C_Name'Last) := ASCII.NUL; | |
730 | return C_Create_File (C_Name (C_Name'First)'Address); | |
731 | end Create_Output_Text_File; | |
732 | ||
733 | ---------------------- | |
734 | -- Create_Temp_File -- | |
735 | ---------------------- | |
736 | ||
737 | procedure Create_Temp_File | |
738 | (FD : out File_Descriptor; | |
739 | Name : out Temp_File_Name) | |
740 | is | |
741 | function Open_New_Temp | |
742 | (Name : System.Address; | |
743 | Fmode : Mode) return File_Descriptor; | |
744 | pragma Import (C, Open_New_Temp, "__gnat_open_new_temp"); | |
745 | ||
746 | begin | |
747 | FD := Open_New_Temp (Name'Address, Binary); | |
748 | end Create_Temp_File; | |
749 | ||
750 | procedure Create_Temp_File | |
751 | (FD : out File_Descriptor; | |
752 | Name : out String_Access) | |
753 | is | |
754 | Pos : Positive; | |
755 | Attempts : Natural := 0; | |
756 | Current : String (Current_Temp_File_Name'Range); | |
757 | ||
758 | begin | |
759 | -- Loop until a new temp file can be created | |
760 | ||
761 | File_Loop : loop | |
762 | Locked : begin | |
763 | -- We need to protect global variable Current_Temp_File_Name | |
764 | -- against concurrent access by different tasks. | |
765 | ||
766 | SSL.Lock_Task.all; | |
767 | ||
768 | -- Start at the last digit | |
769 | ||
770 | Pos := Temp_File_Name_Last_Digit; | |
771 | ||
772 | Digit_Loop : | |
773 | loop | |
774 | -- Increment the digit by one | |
775 | ||
776 | case Current_Temp_File_Name (Pos) is | |
777 | when '0' .. '8' => | |
778 | Current_Temp_File_Name (Pos) := | |
779 | Character'Succ (Current_Temp_File_Name (Pos)); | |
780 | exit Digit_Loop; | |
781 | ||
782 | when '9' => | |
783 | ||
784 | -- For 9, set the digit to 0 and go to the previous digit | |
785 | ||
786 | Current_Temp_File_Name (Pos) := '0'; | |
787 | Pos := Pos - 1; | |
788 | ||
789 | when others => | |
790 | ||
791 | -- If it is not a digit, then there are no available | |
792 | -- temp file names. Return Invalid_FD. There is almost | |
44527de3 VC |
793 | -- no chance that this code will be ever be executed, |
794 | -- since it would mean that there are one million temp | |
795 | -- files in the same directory! | |
30681738 RD |
796 | |
797 | SSL.Unlock_Task.all; | |
798 | FD := Invalid_FD; | |
799 | Name := null; | |
800 | exit File_Loop; | |
801 | end case; | |
802 | end loop Digit_Loop; | |
803 | ||
804 | Current := Current_Temp_File_Name; | |
805 | ||
806 | -- We can now release the lock, because we are no longer | |
807 | -- accessing Current_Temp_File_Name. | |
808 | ||
809 | SSL.Unlock_Task.all; | |
810 | ||
811 | exception | |
812 | when others => | |
813 | SSL.Unlock_Task.all; | |
814 | raise; | |
815 | end Locked; | |
816 | ||
817 | -- Attempt to create the file | |
818 | ||
819 | FD := Create_New_File (Current, Binary); | |
820 | ||
821 | if FD /= Invalid_FD then | |
822 | Name := new String'(Current); | |
823 | exit File_Loop; | |
824 | end if; | |
825 | ||
826 | if not Is_Regular_File (Current) then | |
827 | ||
828 | -- If the file does not already exist and we are unable to create | |
829 | -- it, we give up after Max_Attempts. Otherwise, we try again with | |
830 | -- the next available file name. | |
831 | ||
832 | Attempts := Attempts + 1; | |
833 | ||
834 | if Attempts >= Max_Attempts then | |
835 | FD := Invalid_FD; | |
836 | Name := null; | |
837 | exit File_Loop; | |
838 | end if; | |
839 | end if; | |
840 | end loop File_Loop; | |
841 | end Create_Temp_File; | |
842 | ||
843 | ----------------- | |
844 | -- Delete_File -- | |
845 | ----------------- | |
846 | ||
847 | procedure Delete_File (Name : Address; Success : out Boolean) is | |
848 | R : Integer; | |
849 | ||
850 | function unlink (A : Address) return Integer; | |
55cc1a05 | 851 | pragma Import (C, unlink, "__gnat_unlink"); |
30681738 RD |
852 | |
853 | begin | |
854 | R := unlink (Name); | |
855 | Success := (R = 0); | |
856 | end Delete_File; | |
857 | ||
858 | procedure Delete_File (Name : String; Success : out Boolean) is | |
859 | C_Name : String (1 .. Name'Length + 1); | |
860 | ||
861 | begin | |
862 | C_Name (1 .. Name'Length) := Name; | |
863 | C_Name (C_Name'Last) := ASCII.NUL; | |
864 | ||
865 | Delete_File (C_Name'Address, Success); | |
866 | end Delete_File; | |
867 | ||
868 | --------------------- | |
869 | -- File_Time_Stamp -- | |
870 | --------------------- | |
871 | ||
872 | function File_Time_Stamp (FD : File_Descriptor) return OS_Time is | |
8b79ad42 | 873 | function File_Time (FD : File_Descriptor) return OS_Time; |
30681738 RD |
874 | pragma Import (C, File_Time, "__gnat_file_time_fd"); |
875 | begin | |
876 | return File_Time (FD); | |
877 | end File_Time_Stamp; | |
878 | ||
879 | function File_Time_Stamp (Name : C_File_Name) return OS_Time is | |
880 | function File_Time (Name : Address) return OS_Time; | |
881 | pragma Import (C, File_Time, "__gnat_file_time_name"); | |
882 | begin | |
883 | return File_Time (Name); | |
884 | end File_Time_Stamp; | |
885 | ||
886 | function File_Time_Stamp (Name : String) return OS_Time is | |
887 | F_Name : String (1 .. Name'Length + 1); | |
888 | begin | |
889 | F_Name (1 .. Name'Length) := Name; | |
890 | F_Name (F_Name'Last) := ASCII.NUL; | |
891 | return File_Time_Stamp (F_Name'Address); | |
892 | end File_Time_Stamp; | |
893 | ||
894 | --------------------------- | |
895 | -- Get_Debuggable_Suffix -- | |
896 | --------------------------- | |
897 | ||
898 | function Get_Debuggable_Suffix return String_Access is | |
899 | procedure Get_Suffix_Ptr (Length, Ptr : Address); | |
900 | pragma Import (C, Get_Suffix_Ptr, "__gnat_get_debuggable_suffix_ptr"); | |
901 | ||
902 | procedure Strncpy (Astring_Addr, Cstring : Address; N : Integer); | |
903 | pragma Import (C, Strncpy, "strncpy"); | |
904 | ||
905 | Suffix_Ptr : Address; | |
906 | Suffix_Length : Integer; | |
907 | Result : String_Access; | |
908 | ||
909 | begin | |
910 | Get_Suffix_Ptr (Suffix_Length'Address, Suffix_Ptr'Address); | |
911 | ||
912 | Result := new String (1 .. Suffix_Length); | |
913 | ||
914 | if Suffix_Length > 0 then | |
915 | Strncpy (Result.all'Address, Suffix_Ptr, Suffix_Length); | |
916 | end if; | |
917 | ||
918 | return Result; | |
919 | end Get_Debuggable_Suffix; | |
920 | ||
921 | --------------------------- | |
922 | -- Get_Executable_Suffix -- | |
923 | --------------------------- | |
924 | ||
925 | function Get_Executable_Suffix return String_Access is | |
926 | procedure Get_Suffix_Ptr (Length, Ptr : Address); | |
927 | pragma Import (C, Get_Suffix_Ptr, "__gnat_get_executable_suffix_ptr"); | |
928 | ||
929 | procedure Strncpy (Astring_Addr, Cstring : Address; N : Integer); | |
930 | pragma Import (C, Strncpy, "strncpy"); | |
931 | ||
932 | Suffix_Ptr : Address; | |
933 | Suffix_Length : Integer; | |
934 | Result : String_Access; | |
935 | ||
936 | begin | |
937 | Get_Suffix_Ptr (Suffix_Length'Address, Suffix_Ptr'Address); | |
938 | ||
939 | Result := new String (1 .. Suffix_Length); | |
940 | ||
941 | if Suffix_Length > 0 then | |
942 | Strncpy (Result.all'Address, Suffix_Ptr, Suffix_Length); | |
943 | end if; | |
944 | ||
945 | return Result; | |
946 | end Get_Executable_Suffix; | |
947 | ||
948 | ----------------------- | |
949 | -- Get_Object_Suffix -- | |
950 | ----------------------- | |
951 | ||
952 | function Get_Object_Suffix return String_Access is | |
953 | procedure Get_Suffix_Ptr (Length, Ptr : Address); | |
954 | pragma Import (C, Get_Suffix_Ptr, "__gnat_get_object_suffix_ptr"); | |
955 | ||
956 | procedure Strncpy (Astring_Addr, Cstring : Address; N : Integer); | |
957 | pragma Import (C, Strncpy, "strncpy"); | |
958 | ||
959 | Suffix_Ptr : Address; | |
960 | Suffix_Length : Integer; | |
961 | Result : String_Access; | |
962 | ||
963 | begin | |
964 | Get_Suffix_Ptr (Suffix_Length'Address, Suffix_Ptr'Address); | |
965 | ||
966 | Result := new String (1 .. Suffix_Length); | |
967 | ||
968 | if Suffix_Length > 0 then | |
969 | Strncpy (Result.all'Address, Suffix_Ptr, Suffix_Length); | |
970 | end if; | |
971 | ||
972 | return Result; | |
973 | end Get_Object_Suffix; | |
974 | ||
975 | ---------------------------------- | |
976 | -- Get_Target_Debuggable_Suffix -- | |
977 | ---------------------------------- | |
978 | ||
979 | function Get_Target_Debuggable_Suffix return String_Access is | |
980 | Target_Exec_Ext_Ptr : Address; | |
981 | pragma Import | |
982 | (C, Target_Exec_Ext_Ptr, "__gnat_target_debuggable_extension"); | |
983 | ||
984 | procedure Strncpy (Astring_Addr, Cstring : Address; N : Integer); | |
985 | pragma Import (C, Strncpy, "strncpy"); | |
986 | ||
987 | function Strlen (Cstring : Address) return Integer; | |
988 | pragma Import (C, Strlen, "strlen"); | |
989 | ||
990 | Suffix_Length : Integer; | |
991 | Result : String_Access; | |
992 | ||
993 | begin | |
994 | Suffix_Length := Strlen (Target_Exec_Ext_Ptr); | |
995 | ||
996 | Result := new String (1 .. Suffix_Length); | |
997 | ||
998 | if Suffix_Length > 0 then | |
999 | Strncpy (Result.all'Address, Target_Exec_Ext_Ptr, Suffix_Length); | |
1000 | end if; | |
1001 | ||
1002 | return Result; | |
1003 | end Get_Target_Debuggable_Suffix; | |
1004 | ||
1005 | ---------------------------------- | |
1006 | -- Get_Target_Executable_Suffix -- | |
1007 | ---------------------------------- | |
1008 | ||
1009 | function Get_Target_Executable_Suffix return String_Access is | |
1010 | Target_Exec_Ext_Ptr : Address; | |
1011 | pragma Import | |
1012 | (C, Target_Exec_Ext_Ptr, "__gnat_target_executable_extension"); | |
1013 | ||
1014 | procedure Strncpy (Astring_Addr, Cstring : Address; N : Integer); | |
1015 | pragma Import (C, Strncpy, "strncpy"); | |
1016 | ||
1017 | function Strlen (Cstring : Address) return Integer; | |
1018 | pragma Import (C, Strlen, "strlen"); | |
1019 | ||
1020 | Suffix_Length : Integer; | |
1021 | Result : String_Access; | |
1022 | ||
1023 | begin | |
1024 | Suffix_Length := Strlen (Target_Exec_Ext_Ptr); | |
1025 | ||
1026 | Result := new String (1 .. Suffix_Length); | |
1027 | ||
1028 | if Suffix_Length > 0 then | |
1029 | Strncpy (Result.all'Address, Target_Exec_Ext_Ptr, Suffix_Length); | |
1030 | end if; | |
1031 | ||
1032 | return Result; | |
1033 | end Get_Target_Executable_Suffix; | |
1034 | ||
1035 | ------------------------------ | |
1036 | -- Get_Target_Object_Suffix -- | |
1037 | ------------------------------ | |
1038 | ||
1039 | function Get_Target_Object_Suffix return String_Access is | |
1040 | Target_Object_Ext_Ptr : Address; | |
1041 | pragma Import | |
1042 | (C, Target_Object_Ext_Ptr, "__gnat_target_object_extension"); | |
1043 | ||
1044 | procedure Strncpy (Astring_Addr, Cstring : Address; N : Integer); | |
1045 | pragma Import (C, Strncpy, "strncpy"); | |
1046 | ||
1047 | function Strlen (Cstring : Address) return Integer; | |
1048 | pragma Import (C, Strlen, "strlen"); | |
1049 | ||
1050 | Suffix_Length : Integer; | |
1051 | Result : String_Access; | |
1052 | ||
1053 | begin | |
1054 | Suffix_Length := Strlen (Target_Object_Ext_Ptr); | |
1055 | ||
1056 | Result := new String (1 .. Suffix_Length); | |
1057 | ||
1058 | if Suffix_Length > 0 then | |
1059 | Strncpy (Result.all'Address, Target_Object_Ext_Ptr, Suffix_Length); | |
1060 | end if; | |
1061 | ||
1062 | return Result; | |
1063 | end Get_Target_Object_Suffix; | |
1064 | ||
1065 | ------------ | |
1066 | -- Getenv -- | |
1067 | ------------ | |
1068 | ||
1069 | function Getenv (Name : String) return String_Access is | |
1070 | procedure Get_Env_Value_Ptr (Name, Length, Ptr : Address); | |
1071 | pragma Import (C, Get_Env_Value_Ptr, "__gnat_getenv"); | |
1072 | ||
1073 | procedure Strncpy (Astring_Addr, Cstring : Address; N : Integer); | |
1074 | pragma Import (C, Strncpy, "strncpy"); | |
1075 | ||
1076 | Env_Value_Ptr : aliased Address; | |
1077 | Env_Value_Length : aliased Integer; | |
1078 | F_Name : aliased String (1 .. Name'Length + 1); | |
1079 | Result : String_Access; | |
1080 | ||
1081 | begin | |
1082 | F_Name (1 .. Name'Length) := Name; | |
1083 | F_Name (F_Name'Last) := ASCII.NUL; | |
1084 | ||
1085 | Get_Env_Value_Ptr | |
1086 | (F_Name'Address, Env_Value_Length'Address, Env_Value_Ptr'Address); | |
1087 | ||
1088 | Result := new String (1 .. Env_Value_Length); | |
1089 | ||
1090 | if Env_Value_Length > 0 then | |
1091 | Strncpy (Result.all'Address, Env_Value_Ptr, Env_Value_Length); | |
1092 | end if; | |
1093 | ||
1094 | return Result; | |
1095 | end Getenv; | |
1096 | ||
1097 | ------------ | |
1098 | -- GM_Day -- | |
1099 | ------------ | |
1100 | ||
1101 | function GM_Day (Date : OS_Time) return Day_Type is | |
67ce0d7e RD |
1102 | D : Day_Type; |
1103 | ||
1104 | pragma Warnings (Off); | |
30681738 RD |
1105 | Y : Year_Type; |
1106 | Mo : Month_Type; | |
30681738 RD |
1107 | H : Hour_Type; |
1108 | Mn : Minute_Type; | |
1109 | S : Second_Type; | |
67ce0d7e | 1110 | pragma Warnings (On); |
30681738 RD |
1111 | |
1112 | begin | |
1113 | GM_Split (Date, Y, Mo, D, H, Mn, S); | |
1114 | return D; | |
1115 | end GM_Day; | |
1116 | ||
1117 | ------------- | |
1118 | -- GM_Hour -- | |
1119 | ------------- | |
1120 | ||
1121 | function GM_Hour (Date : OS_Time) return Hour_Type is | |
67ce0d7e RD |
1122 | H : Hour_Type; |
1123 | ||
1124 | pragma Warnings (Off); | |
30681738 RD |
1125 | Y : Year_Type; |
1126 | Mo : Month_Type; | |
1127 | D : Day_Type; | |
30681738 RD |
1128 | Mn : Minute_Type; |
1129 | S : Second_Type; | |
67ce0d7e | 1130 | pragma Warnings (On); |
30681738 RD |
1131 | |
1132 | begin | |
1133 | GM_Split (Date, Y, Mo, D, H, Mn, S); | |
1134 | return H; | |
1135 | end GM_Hour; | |
1136 | ||
1137 | --------------- | |
1138 | -- GM_Minute -- | |
1139 | --------------- | |
1140 | ||
1141 | function GM_Minute (Date : OS_Time) return Minute_Type is | |
67ce0d7e RD |
1142 | Mn : Minute_Type; |
1143 | ||
1144 | pragma Warnings (Off); | |
30681738 RD |
1145 | Y : Year_Type; |
1146 | Mo : Month_Type; | |
1147 | D : Day_Type; | |
1148 | H : Hour_Type; | |
30681738 | 1149 | S : Second_Type; |
67ce0d7e | 1150 | pragma Warnings (On); |
30681738 RD |
1151 | |
1152 | begin | |
1153 | GM_Split (Date, Y, Mo, D, H, Mn, S); | |
1154 | return Mn; | |
1155 | end GM_Minute; | |
1156 | ||
1157 | -------------- | |
1158 | -- GM_Month -- | |
1159 | -------------- | |
1160 | ||
1161 | function GM_Month (Date : OS_Time) return Month_Type is | |
30681738 | 1162 | Mo : Month_Type; |
67ce0d7e RD |
1163 | |
1164 | pragma Warnings (Off); | |
1165 | Y : Year_Type; | |
30681738 RD |
1166 | D : Day_Type; |
1167 | H : Hour_Type; | |
1168 | Mn : Minute_Type; | |
1169 | S : Second_Type; | |
67ce0d7e | 1170 | pragma Warnings (On); |
30681738 RD |
1171 | |
1172 | begin | |
1173 | GM_Split (Date, Y, Mo, D, H, Mn, S); | |
1174 | return Mo; | |
1175 | end GM_Month; | |
1176 | ||
1177 | --------------- | |
1178 | -- GM_Second -- | |
1179 | --------------- | |
1180 | ||
1181 | function GM_Second (Date : OS_Time) return Second_Type is | |
67ce0d7e RD |
1182 | S : Second_Type; |
1183 | ||
1184 | pragma Warnings (Off); | |
30681738 RD |
1185 | Y : Year_Type; |
1186 | Mo : Month_Type; | |
1187 | D : Day_Type; | |
1188 | H : Hour_Type; | |
1189 | Mn : Minute_Type; | |
67ce0d7e | 1190 | pragma Warnings (On); |
30681738 RD |
1191 | |
1192 | begin | |
1193 | GM_Split (Date, Y, Mo, D, H, Mn, S); | |
1194 | return S; | |
1195 | end GM_Second; | |
1196 | ||
1197 | -------------- | |
1198 | -- GM_Split -- | |
1199 | -------------- | |
1200 | ||
1201 | procedure GM_Split | |
1202 | (Date : OS_Time; | |
1203 | Year : out Year_Type; | |
1204 | Month : out Month_Type; | |
1205 | Day : out Day_Type; | |
1206 | Hour : out Hour_Type; | |
1207 | Minute : out Minute_Type; | |
1208 | Second : out Second_Type) | |
1209 | is | |
1210 | procedure To_GM_Time | |
1211 | (P_Time_T, P_Year, P_Month, P_Day, P_Hours, P_Mins, P_Secs : Address); | |
1212 | pragma Import (C, To_GM_Time, "__gnat_to_gm_time"); | |
1213 | ||
1214 | T : OS_Time := Date; | |
1215 | Y : Integer; | |
1216 | Mo : Integer; | |
1217 | D : Integer; | |
1218 | H : Integer; | |
1219 | Mn : Integer; | |
1220 | S : Integer; | |
1221 | ||
1222 | begin | |
1223 | -- Use the global lock because To_GM_Time is not thread safe | |
1224 | ||
1225 | Locked_Processing : begin | |
1226 | SSL.Lock_Task.all; | |
1227 | To_GM_Time | |
1228 | (T'Address, Y'Address, Mo'Address, D'Address, | |
1229 | H'Address, Mn'Address, S'Address); | |
1230 | SSL.Unlock_Task.all; | |
1231 | ||
1232 | exception | |
1233 | when others => | |
1234 | SSL.Unlock_Task.all; | |
1235 | raise; | |
1236 | end Locked_Processing; | |
1237 | ||
1238 | Year := Y + 1900; | |
1239 | Month := Mo + 1; | |
1240 | Day := D; | |
1241 | Hour := H; | |
1242 | Minute := Mn; | |
1243 | Second := S; | |
1244 | end GM_Split; | |
1245 | ||
1246 | ------------- | |
1247 | -- GM_Year -- | |
1248 | ------------- | |
1249 | ||
1250 | function GM_Year (Date : OS_Time) return Year_Type is | |
1251 | Y : Year_Type; | |
67ce0d7e RD |
1252 | |
1253 | pragma Warnings (Off); | |
30681738 RD |
1254 | Mo : Month_Type; |
1255 | D : Day_Type; | |
1256 | H : Hour_Type; | |
1257 | Mn : Minute_Type; | |
1258 | S : Second_Type; | |
67ce0d7e | 1259 | pragma Warnings (On); |
30681738 RD |
1260 | |
1261 | begin | |
1262 | GM_Split (Date, Y, Mo, D, H, Mn, S); | |
1263 | return Y; | |
1264 | end GM_Year; | |
1265 | ||
1266 | ---------------------- | |
1267 | -- Is_Absolute_Path -- | |
1268 | ---------------------- | |
1269 | ||
1270 | function Is_Absolute_Path (Name : String) return Boolean is | |
1271 | function Is_Absolute_Path | |
1272 | (Name : Address; | |
1273 | Length : Integer) return Integer; | |
1274 | pragma Import (C, Is_Absolute_Path, "__gnat_is_absolute_path"); | |
1275 | begin | |
1276 | return Is_Absolute_Path (Name'Address, Name'Length) /= 0; | |
1277 | end Is_Absolute_Path; | |
1278 | ||
1279 | ------------------ | |
1280 | -- Is_Directory -- | |
1281 | ------------------ | |
1282 | ||
1283 | function Is_Directory (Name : C_File_Name) return Boolean is | |
1284 | function Is_Directory (Name : Address) return Integer; | |
1285 | pragma Import (C, Is_Directory, "__gnat_is_directory"); | |
1286 | begin | |
1287 | return Is_Directory (Name) /= 0; | |
1288 | end Is_Directory; | |
1289 | ||
1290 | function Is_Directory (Name : String) return Boolean is | |
1291 | F_Name : String (1 .. Name'Length + 1); | |
1292 | begin | |
1293 | F_Name (1 .. Name'Length) := Name; | |
1294 | F_Name (F_Name'Last) := ASCII.NUL; | |
1295 | return Is_Directory (F_Name'Address); | |
1296 | end Is_Directory; | |
1297 | ||
1298 | ---------------------- | |
1299 | -- Is_Readable_File -- | |
1300 | ---------------------- | |
1301 | ||
1302 | function Is_Readable_File (Name : C_File_Name) return Boolean is | |
1303 | function Is_Readable_File (Name : Address) return Integer; | |
1304 | pragma Import (C, Is_Readable_File, "__gnat_is_readable_file"); | |
1305 | begin | |
1306 | return Is_Readable_File (Name) /= 0; | |
1307 | end Is_Readable_File; | |
1308 | ||
1309 | function Is_Readable_File (Name : String) return Boolean is | |
1310 | F_Name : String (1 .. Name'Length + 1); | |
1311 | begin | |
1312 | F_Name (1 .. Name'Length) := Name; | |
1313 | F_Name (F_Name'Last) := ASCII.NUL; | |
1314 | return Is_Readable_File (F_Name'Address); | |
1315 | end Is_Readable_File; | |
1316 | ||
d559d5c6 AC |
1317 | ------------------------ |
1318 | -- Is_Executable_File -- | |
1319 | ------------------------ | |
1320 | ||
1321 | function Is_Executable_File (Name : C_File_Name) return Boolean is | |
1322 | function Is_Executable_File (Name : Address) return Integer; | |
1323 | pragma Import (C, Is_Executable_File, "__gnat_is_executable_file"); | |
1324 | begin | |
1325 | return Is_Executable_File (Name) /= 0; | |
1326 | end Is_Executable_File; | |
1327 | ||
1328 | function Is_Executable_File (Name : String) return Boolean is | |
1329 | F_Name : String (1 .. Name'Length + 1); | |
1330 | begin | |
1331 | F_Name (1 .. Name'Length) := Name; | |
1332 | F_Name (F_Name'Last) := ASCII.NUL; | |
1333 | return Is_Executable_File (F_Name'Address); | |
1334 | end Is_Executable_File; | |
1335 | ||
30681738 RD |
1336 | --------------------- |
1337 | -- Is_Regular_File -- | |
1338 | --------------------- | |
1339 | ||
1340 | function Is_Regular_File (Name : C_File_Name) return Boolean is | |
1341 | function Is_Regular_File (Name : Address) return Integer; | |
1342 | pragma Import (C, Is_Regular_File, "__gnat_is_regular_file"); | |
1343 | begin | |
1344 | return Is_Regular_File (Name) /= 0; | |
1345 | end Is_Regular_File; | |
1346 | ||
1347 | function Is_Regular_File (Name : String) return Boolean is | |
1348 | F_Name : String (1 .. Name'Length + 1); | |
1349 | begin | |
1350 | F_Name (1 .. Name'Length) := Name; | |
1351 | F_Name (F_Name'Last) := ASCII.NUL; | |
1352 | return Is_Regular_File (F_Name'Address); | |
1353 | end Is_Regular_File; | |
1354 | ||
1355 | ---------------------- | |
1356 | -- Is_Symbolic_Link -- | |
1357 | ---------------------- | |
1358 | ||
1359 | function Is_Symbolic_Link (Name : C_File_Name) return Boolean is | |
1360 | function Is_Symbolic_Link (Name : Address) return Integer; | |
1361 | pragma Import (C, Is_Symbolic_Link, "__gnat_is_symbolic_link"); | |
1362 | begin | |
1363 | return Is_Symbolic_Link (Name) /= 0; | |
1364 | end Is_Symbolic_Link; | |
1365 | ||
1366 | function Is_Symbolic_Link (Name : String) return Boolean is | |
1367 | F_Name : String (1 .. Name'Length + 1); | |
1368 | begin | |
1369 | F_Name (1 .. Name'Length) := Name; | |
1370 | F_Name (F_Name'Last) := ASCII.NUL; | |
1371 | return Is_Symbolic_Link (F_Name'Address); | |
1372 | end Is_Symbolic_Link; | |
1373 | ||
1374 | ---------------------- | |
1375 | -- Is_Writable_File -- | |
1376 | ---------------------- | |
1377 | ||
1378 | function Is_Writable_File (Name : C_File_Name) return Boolean is | |
1379 | function Is_Writable_File (Name : Address) return Integer; | |
1380 | pragma Import (C, Is_Writable_File, "__gnat_is_writable_file"); | |
1381 | begin | |
1382 | return Is_Writable_File (Name) /= 0; | |
1383 | end Is_Writable_File; | |
1384 | ||
1385 | function Is_Writable_File (Name : String) return Boolean is | |
1386 | F_Name : String (1 .. Name'Length + 1); | |
1387 | begin | |
1388 | F_Name (1 .. Name'Length) := Name; | |
1389 | F_Name (F_Name'Last) := ASCII.NUL; | |
1390 | return Is_Writable_File (F_Name'Address); | |
1391 | end Is_Writable_File; | |
1392 | ||
1393 | ------------------------- | |
1394 | -- Locate_Exec_On_Path -- | |
1395 | ------------------------- | |
1396 | ||
1397 | function Locate_Exec_On_Path | |
1398 | (Exec_Name : String) return String_Access | |
1399 | is | |
1400 | function Locate_Exec_On_Path (C_Exec_Name : Address) return Address; | |
1401 | pragma Import (C, Locate_Exec_On_Path, "__gnat_locate_exec_on_path"); | |
1402 | ||
1403 | procedure Free (Ptr : System.Address); | |
1404 | pragma Import (C, Free, "free"); | |
1405 | ||
1406 | C_Exec_Name : String (1 .. Exec_Name'Length + 1); | |
1407 | Path_Addr : Address; | |
1408 | Path_Len : Integer; | |
1409 | Result : String_Access; | |
1410 | ||
1411 | begin | |
1412 | C_Exec_Name (1 .. Exec_Name'Length) := Exec_Name; | |
1413 | C_Exec_Name (C_Exec_Name'Last) := ASCII.NUL; | |
1414 | ||
1415 | Path_Addr := Locate_Exec_On_Path (C_Exec_Name'Address); | |
1416 | Path_Len := C_String_Length (Path_Addr); | |
1417 | ||
1418 | if Path_Len = 0 then | |
1419 | return null; | |
1420 | ||
1421 | else | |
1422 | Result := To_Path_String_Access (Path_Addr, Path_Len); | |
1423 | Free (Path_Addr); | |
1424 | ||
1425 | -- Always return an absolute path name | |
1426 | ||
1427 | if not Is_Absolute_Path (Result.all) then | |
1428 | declare | |
1429 | Absolute_Path : constant String := | |
1430 | Normalize_Pathname (Result.all); | |
1431 | begin | |
1432 | Free (Result); | |
1433 | Result := new String'(Absolute_Path); | |
1434 | end; | |
1435 | end if; | |
1436 | ||
1437 | return Result; | |
1438 | end if; | |
1439 | end Locate_Exec_On_Path; | |
1440 | ||
1441 | ------------------------- | |
1442 | -- Locate_Regular_File -- | |
1443 | ------------------------- | |
1444 | ||
1445 | function Locate_Regular_File | |
1446 | (File_Name : C_File_Name; | |
1447 | Path : C_File_Name) return String_Access | |
1448 | is | |
1449 | function Locate_Regular_File | |
1450 | (C_File_Name, Path_Val : Address) return Address; | |
1451 | pragma Import (C, Locate_Regular_File, "__gnat_locate_regular_file"); | |
1452 | ||
1453 | procedure Free (Ptr : System.Address); | |
1454 | pragma Import (C, Free, "free"); | |
1455 | ||
1456 | Path_Addr : Address; | |
1457 | Path_Len : Integer; | |
1458 | Result : String_Access; | |
1459 | ||
1460 | begin | |
1461 | Path_Addr := Locate_Regular_File (File_Name, Path); | |
1462 | Path_Len := C_String_Length (Path_Addr); | |
1463 | ||
1464 | if Path_Len = 0 then | |
1465 | return null; | |
8b79ad42 | 1466 | |
30681738 RD |
1467 | else |
1468 | Result := To_Path_String_Access (Path_Addr, Path_Len); | |
1469 | Free (Path_Addr); | |
1470 | return Result; | |
1471 | end if; | |
1472 | end Locate_Regular_File; | |
1473 | ||
1474 | function Locate_Regular_File | |
1475 | (File_Name : String; | |
1476 | Path : String) return String_Access | |
1477 | is | |
1478 | C_File_Name : String (1 .. File_Name'Length + 1); | |
1479 | C_Path : String (1 .. Path'Length + 1); | |
1480 | Result : String_Access; | |
1481 | ||
1482 | begin | |
1483 | C_File_Name (1 .. File_Name'Length) := File_Name; | |
1484 | C_File_Name (C_File_Name'Last) := ASCII.NUL; | |
1485 | ||
1486 | C_Path (1 .. Path'Length) := Path; | |
1487 | C_Path (C_Path'Last) := ASCII.NUL; | |
1488 | ||
1489 | Result := Locate_Regular_File (C_File_Name'Address, C_Path'Address); | |
1490 | ||
1491 | -- Always return an absolute path name | |
1492 | ||
1493 | if Result /= null and then not Is_Absolute_Path (Result.all) then | |
1494 | declare | |
1495 | Absolute_Path : constant String := Normalize_Pathname (Result.all); | |
1496 | begin | |
1497 | Free (Result); | |
1498 | Result := new String'(Absolute_Path); | |
1499 | end; | |
1500 | end if; | |
1501 | ||
1502 | return Result; | |
1503 | end Locate_Regular_File; | |
1504 | ||
1505 | ------------------------ | |
1506 | -- Non_Blocking_Spawn -- | |
1507 | ------------------------ | |
1508 | ||
1509 | function Non_Blocking_Spawn | |
1510 | (Program_Name : String; | |
1511 | Args : Argument_List) return Process_Id | |
1512 | is | |
30681738 | 1513 | Pid : Process_Id; |
67ce0d7e RD |
1514 | Junk : Integer; |
1515 | pragma Warnings (Off, Junk); | |
30681738 RD |
1516 | begin |
1517 | Spawn_Internal (Program_Name, Args, Junk, Pid, Blocking => False); | |
1518 | return Pid; | |
1519 | end Non_Blocking_Spawn; | |
1520 | ||
1521 | function Non_Blocking_Spawn | |
1522 | (Program_Name : String; | |
1523 | Args : Argument_List; | |
1524 | Output_File_Descriptor : File_Descriptor; | |
1525 | Err_To_Out : Boolean := True) return Process_Id | |
1526 | is | |
1527 | Saved_Output : File_Descriptor; | |
1528 | Saved_Error : File_Descriptor := Invalid_FD; -- prevent warning | |
1529 | Pid : Process_Id; | |
1530 | ||
1531 | begin | |
1532 | if Output_File_Descriptor = Invalid_FD then | |
1533 | return Invalid_Pid; | |
1534 | end if; | |
1535 | ||
1536 | -- Set standard output and, if specified, error to the temporary file | |
1537 | ||
1538 | Saved_Output := Dup (Standout); | |
1539 | Dup2 (Output_File_Descriptor, Standout); | |
1540 | ||
1541 | if Err_To_Out then | |
1542 | Saved_Error := Dup (Standerr); | |
1543 | Dup2 (Output_File_Descriptor, Standerr); | |
1544 | end if; | |
1545 | ||
1546 | -- Spawn the program | |
1547 | ||
1548 | Pid := Non_Blocking_Spawn (Program_Name, Args); | |
1549 | ||
1550 | -- Restore the standard output and error | |
1551 | ||
1552 | Dup2 (Saved_Output, Standout); | |
1553 | ||
1554 | if Err_To_Out then | |
1555 | Dup2 (Saved_Error, Standerr); | |
1556 | end if; | |
1557 | ||
1558 | -- And close the saved standard output and error file descriptors | |
1559 | ||
1560 | Close (Saved_Output); | |
1561 | ||
1562 | if Err_To_Out then | |
1563 | Close (Saved_Error); | |
1564 | end if; | |
1565 | ||
1566 | return Pid; | |
1567 | end Non_Blocking_Spawn; | |
1568 | ||
1569 | function Non_Blocking_Spawn | |
1570 | (Program_Name : String; | |
1571 | Args : Argument_List; | |
1572 | Output_File : String; | |
1573 | Err_To_Out : Boolean := True) return Process_Id | |
1574 | is | |
1575 | Output_File_Descriptor : constant File_Descriptor := | |
1576 | Create_Output_Text_File (Output_File); | |
1577 | Result : Process_Id; | |
1578 | ||
1579 | begin | |
1580 | -- Do not attempt to spawn if the output file could not be created | |
1581 | ||
1582 | if Output_File_Descriptor = Invalid_FD then | |
1583 | return Invalid_Pid; | |
1584 | ||
1585 | else | |
1586 | Result := Non_Blocking_Spawn | |
1587 | (Program_Name, Args, Output_File_Descriptor, Err_To_Out); | |
1588 | ||
1589 | -- Close the file just created for the output, as the file descriptor | |
1590 | -- cannot be used anywhere, being a local value. It is safe to do | |
1591 | -- that, as the file descriptor has been duplicated to form | |
1592 | -- standard output and error of the spawned process. | |
1593 | ||
1594 | Close (Output_File_Descriptor); | |
1595 | ||
1596 | return Result; | |
1597 | end if; | |
1598 | end Non_Blocking_Spawn; | |
1599 | ||
1600 | ------------------------- | |
1601 | -- Normalize_Arguments -- | |
1602 | ------------------------- | |
1603 | ||
1604 | procedure Normalize_Arguments (Args : in out Argument_List) is | |
1605 | ||
1606 | procedure Quote_Argument (Arg : in out String_Access); | |
1607 | -- Add quote around argument if it contains spaces | |
1608 | ||
1609 | C_Argument_Needs_Quote : Integer; | |
1610 | pragma Import (C, C_Argument_Needs_Quote, "__gnat_argument_needs_quote"); | |
1611 | Argument_Needs_Quote : constant Boolean := C_Argument_Needs_Quote /= 0; | |
1612 | ||
1613 | -------------------- | |
1614 | -- Quote_Argument -- | |
1615 | -------------------- | |
1616 | ||
1617 | procedure Quote_Argument (Arg : in out String_Access) is | |
1618 | Res : String (1 .. Arg'Length * 2); | |
1619 | J : Positive := 1; | |
1620 | Quote_Needed : Boolean := False; | |
1621 | ||
1622 | begin | |
1623 | if Arg (Arg'First) /= '"' or else Arg (Arg'Last) /= '"' then | |
1624 | ||
1625 | -- Starting quote | |
1626 | ||
1627 | Res (J) := '"'; | |
1628 | ||
1629 | for K in Arg'Range loop | |
1630 | ||
1631 | J := J + 1; | |
1632 | ||
1633 | if Arg (K) = '"' then | |
1634 | Res (J) := '\'; | |
1635 | J := J + 1; | |
1636 | Res (J) := '"'; | |
1637 | Quote_Needed := True; | |
1638 | ||
1639 | elsif Arg (K) = ' ' then | |
1640 | Res (J) := Arg (K); | |
1641 | Quote_Needed := True; | |
1642 | ||
1643 | else | |
1644 | Res (J) := Arg (K); | |
1645 | end if; | |
1646 | ||
1647 | end loop; | |
1648 | ||
1649 | if Quote_Needed then | |
1650 | ||
1651 | -- If null terminated string, put the quote before | |
1652 | ||
43c6e0cb | 1653 | if Res (J) = ASCII.NUL then |
30681738 RD |
1654 | Res (J) := '"'; |
1655 | J := J + 1; | |
43c6e0cb | 1656 | Res (J) := ASCII.NUL; |
30681738 RD |
1657 | |
1658 | -- If argument is terminated by '\', then double it. Otherwise | |
1659 | -- the ending quote will be taken as-is. This is quite strange | |
1660 | -- spawn behavior from Windows, but this is what we see! | |
1661 | ||
1662 | else | |
1663 | if Res (J) = '\' then | |
1664 | J := J + 1; | |
1665 | Res (J) := '\'; | |
1666 | end if; | |
1667 | ||
1668 | -- Ending quote | |
1669 | ||
1670 | J := J + 1; | |
1671 | Res (J) := '"'; | |
1672 | end if; | |
1673 | ||
1674 | declare | |
1675 | Old : String_Access := Arg; | |
1676 | ||
1677 | begin | |
1678 | Arg := new String'(Res (1 .. J)); | |
1679 | Free (Old); | |
1680 | end; | |
1681 | end if; | |
1682 | ||
1683 | end if; | |
1684 | end Quote_Argument; | |
1685 | ||
1686 | -- Start of processing for Normalize_Arguments | |
1687 | ||
1688 | begin | |
1689 | if Argument_Needs_Quote then | |
1690 | for K in Args'Range loop | |
1691 | if Args (K) /= null and then Args (K)'Length /= 0 then | |
1692 | Quote_Argument (Args (K)); | |
1693 | end if; | |
1694 | end loop; | |
1695 | end if; | |
1696 | end Normalize_Arguments; | |
1697 | ||
1698 | ------------------------ | |
1699 | -- Normalize_Pathname -- | |
1700 | ------------------------ | |
1701 | ||
1702 | function Normalize_Pathname | |
1703 | (Name : String; | |
1704 | Directory : String := ""; | |
1705 | Resolve_Links : Boolean := True; | |
1706 | Case_Sensitive : Boolean := True) return String | |
1707 | is | |
1708 | Max_Path : Integer; | |
1709 | pragma Import (C, Max_Path, "__gnat_max_path_len"); | |
1710 | -- Maximum length of a path name | |
1711 | ||
1712 | procedure Get_Current_Dir | |
1713 | (Dir : System.Address; | |
1714 | Length : System.Address); | |
1715 | pragma Import (C, Get_Current_Dir, "__gnat_get_current_dir"); | |
1716 | ||
1717 | Path_Buffer : String (1 .. Max_Path + Max_Path + 2); | |
1718 | End_Path : Natural := 0; | |
1719 | Link_Buffer : String (1 .. Max_Path + 2); | |
1720 | Status : Integer; | |
1721 | Last : Positive; | |
1722 | Start : Natural; | |
1723 | Finish : Positive; | |
1724 | ||
1725 | Max_Iterations : constant := 500; | |
1726 | ||
1727 | function Get_File_Names_Case_Sensitive return Integer; | |
1728 | pragma Import | |
1729 | (C, Get_File_Names_Case_Sensitive, | |
1730 | "__gnat_get_file_names_case_sensitive"); | |
1731 | ||
1732 | Fold_To_Lower_Case : constant Boolean := | |
1733 | not Case_Sensitive | |
1734 | and then Get_File_Names_Case_Sensitive = 0; | |
1735 | ||
1736 | function Readlink | |
1737 | (Path : System.Address; | |
1738 | Buf : System.Address; | |
1739 | Bufsiz : Integer) return Integer; | |
1740 | pragma Import (C, Readlink, "__gnat_readlink"); | |
1741 | ||
1742 | function To_Canonical_File_Spec | |
1743 | (Host_File : System.Address) return System.Address; | |
1744 | pragma Import | |
1745 | (C, To_Canonical_File_Spec, "__gnat_to_canonical_file_spec"); | |
1746 | ||
1747 | The_Name : String (1 .. Name'Length + 1); | |
1748 | Canonical_File_Addr : System.Address; | |
1749 | Canonical_File_Len : Integer; | |
1750 | ||
30681738 RD |
1751 | function Strlen (S : System.Address) return Integer; |
1752 | pragma Import (C, Strlen, "strlen"); | |
1753 | ||
1754 | function Final_Value (S : String) return String; | |
33c423c8 AC |
1755 | -- Make final adjustment to the returned string. This function strips |
1756 | -- trailing directory separators, and folds returned string to lower | |
1757 | -- case if required. | |
30681738 RD |
1758 | |
1759 | function Get_Directory (Dir : String) return String; | |
1760 | -- If Dir is not empty, return it, adding a directory separator | |
1761 | -- if not already present, otherwise return current working directory | |
1762 | -- with terminating directory separator. | |
1763 | ||
1764 | ----------------- | |
1765 | -- Final_Value -- | |
1766 | ----------------- | |
1767 | ||
1768 | function Final_Value (S : String) return String is | |
1769 | S1 : String := S; | |
1770 | -- We may need to fold S to lower case, so we need a variable | |
1771 | ||
1772 | Last : Natural; | |
1773 | ||
1774 | begin | |
33c423c8 AC |
1775 | if Fold_To_Lower_Case then |
1776 | System.Case_Util.To_Lower (S1); | |
1777 | end if; | |
30681738 | 1778 | |
33c423c8 | 1779 | -- Remove trailing directory separator, if any |
30681738 | 1780 | |
33c423c8 | 1781 | Last := S1'Last; |
30681738 | 1782 | |
33c423c8 AC |
1783 | if Last > 1 |
1784 | and then (S1 (Last) = '/' | |
1785 | or else | |
1786 | S1 (Last) = Directory_Separator) | |
1787 | then | |
1788 | -- Special case for Windows: C:\ | |
30681738 | 1789 | |
33c423c8 AC |
1790 | if Last = 3 |
1791 | and then S1 (1) /= Directory_Separator | |
1792 | and then S1 (2) = ':' | |
30681738 | 1793 | then |
33c423c8 | 1794 | null; |
30681738 | 1795 | |
33c423c8 AC |
1796 | else |
1797 | Last := Last - 1; | |
30681738 | 1798 | end if; |
30681738 | 1799 | end if; |
33c423c8 AC |
1800 | |
1801 | return S1 (1 .. Last); | |
30681738 RD |
1802 | end Final_Value; |
1803 | ||
1804 | ------------------- | |
1805 | -- Get_Directory -- | |
1806 | ------------------- | |
1807 | ||
1808 | function Get_Directory (Dir : String) return String is | |
1809 | begin | |
1810 | -- Directory given, add directory separator if needed | |
1811 | ||
1812 | if Dir'Length > 0 then | |
1813 | if Dir (Dir'Last) = Directory_Separator then | |
1814 | return Dir; | |
1815 | else | |
1816 | declare | |
1817 | Result : String (1 .. Dir'Length + 1); | |
1818 | begin | |
1819 | Result (1 .. Dir'Length) := Dir; | |
1820 | Result (Result'Length) := Directory_Separator; | |
1821 | return Result; | |
1822 | end; | |
1823 | end if; | |
1824 | ||
1825 | -- Directory name not given, get current directory | |
1826 | ||
1827 | else | |
1828 | declare | |
1829 | Buffer : String (1 .. Max_Path + 2); | |
1830 | Path_Len : Natural := Max_Path; | |
1831 | ||
1832 | begin | |
1833 | Get_Current_Dir (Buffer'Address, Path_Len'Address); | |
1834 | ||
1835 | if Buffer (Path_Len) /= Directory_Separator then | |
1836 | Path_Len := Path_Len + 1; | |
1837 | Buffer (Path_Len) := Directory_Separator; | |
1838 | end if; | |
1839 | ||
1840 | -- By default, the drive letter on Windows is in upper case | |
1841 | ||
1842 | if On_Windows and then Path_Len >= 2 and then | |
1843 | Buffer (2) = ':' | |
1844 | then | |
1845 | System.Case_Util.To_Upper (Buffer (1 .. 1)); | |
1846 | end if; | |
1847 | ||
1848 | return Buffer (1 .. Path_Len); | |
1849 | end; | |
1850 | end if; | |
1851 | end Get_Directory; | |
1852 | ||
30681738 RD |
1853 | -- Start of processing for Normalize_Pathname |
1854 | ||
1855 | begin | |
1856 | -- Special case, if name is null, then return null | |
1857 | ||
1858 | if Name'Length = 0 then | |
1859 | return ""; | |
1860 | end if; | |
1861 | ||
1862 | -- First, convert VMS file spec to Unix file spec. | |
1863 | -- If Name is not in VMS syntax, then this is equivalent | |
276e95ca | 1864 | -- to put Name at the beginning of Path_Buffer. |
30681738 RD |
1865 | |
1866 | VMS_Conversion : begin | |
1867 | The_Name (1 .. Name'Length) := Name; | |
1868 | The_Name (The_Name'Last) := ASCII.NUL; | |
1869 | ||
1870 | Canonical_File_Addr := To_Canonical_File_Spec (The_Name'Address); | |
1871 | Canonical_File_Len := Strlen (Canonical_File_Addr); | |
1872 | ||
1873 | -- If VMS syntax conversion has failed, return an empty string | |
1874 | -- to indicate the failure. | |
1875 | ||
1876 | if Canonical_File_Len = 0 then | |
1877 | return ""; | |
1878 | end if; | |
1879 | ||
1880 | declare | |
1881 | subtype Path_String is String (1 .. Canonical_File_Len); | |
1882 | type Path_String_Access is access Path_String; | |
1883 | ||
1884 | function Address_To_Access is new | |
1885 | Ada.Unchecked_Conversion (Source => Address, | |
1886 | Target => Path_String_Access); | |
1887 | ||
1888 | Path_Access : constant Path_String_Access := | |
1889 | Address_To_Access (Canonical_File_Addr); | |
1890 | ||
1891 | begin | |
1892 | Path_Buffer (1 .. Canonical_File_Len) := Path_Access.all; | |
1893 | End_Path := Canonical_File_Len; | |
1894 | Last := 1; | |
1895 | end; | |
1896 | end VMS_Conversion; | |
1897 | ||
1898 | -- Replace all '/' by Directory Separators (this is for Windows) | |
1899 | ||
1900 | if Directory_Separator /= '/' then | |
1901 | for Index in 1 .. End_Path loop | |
1902 | if Path_Buffer (Index) = '/' then | |
1903 | Path_Buffer (Index) := Directory_Separator; | |
1904 | end if; | |
1905 | end loop; | |
1906 | end if; | |
1907 | ||
1908 | -- Resolve directory names for Windows (formerly also VMS) | |
1909 | ||
1910 | -- On VMS, if we have a Unix path such as /temp/..., and TEMP is a | |
1911 | -- logical name, we must not try to resolve this logical name, because | |
1912 | -- it may have multiple equivalences and if resolved we will only | |
1913 | -- get the first one. | |
1914 | ||
1915 | -- On Windows, if we have an absolute path starting with a directory | |
1916 | -- separator, we need to have the drive letter appended in front. | |
1917 | ||
1918 | -- On Windows, Get_Current_Dir will return a suitable directory | |
1919 | -- name (path starting with a drive letter on Windows). So we take this | |
1920 | -- drive letter and prepend it to the current path. | |
1921 | ||
1922 | if On_Windows | |
1923 | and then Path_Buffer (1) = Directory_Separator | |
1924 | and then Path_Buffer (2) /= Directory_Separator | |
1925 | then | |
1926 | declare | |
f5dac0d7 | 1927 | Cur_Dir : constant String := Get_Directory (""); |
30681738 RD |
1928 | -- Get the current directory to get the drive letter |
1929 | ||
1930 | begin | |
1931 | if Cur_Dir'Length > 2 | |
1932 | and then Cur_Dir (Cur_Dir'First + 1) = ':' | |
1933 | then | |
1934 | Path_Buffer (3 .. End_Path + 2) := Path_Buffer (1 .. End_Path); | |
1935 | Path_Buffer (1 .. 2) := | |
1936 | Cur_Dir (Cur_Dir'First .. Cur_Dir'First + 1); | |
1937 | End_Path := End_Path + 2; | |
1938 | end if; | |
1939 | end; | |
1940 | end if; | |
1941 | ||
d1b4f87d AC |
1942 | -- On Windows, remove all double-quotes that are possibly part of the |
1943 | -- path but can cause problems with other methods. | |
1944 | ||
1945 | if On_Windows then | |
1946 | declare | |
f7fd2ec3 RD |
1947 | Index : Natural; |
1948 | ||
d1b4f87d | 1949 | begin |
f7fd2ec3 | 1950 | Index := Path_Buffer'First; |
d1b4f87d AC |
1951 | for Current in Path_Buffer'First .. End_Path loop |
1952 | if Path_Buffer (Current) /= '"' then | |
1953 | Path_Buffer (Index) := Path_Buffer (Current); | |
1954 | Index := Index + 1; | |
1955 | end if; | |
1956 | end loop; | |
1957 | ||
1958 | End_Path := Index - 1; | |
1959 | end; | |
1960 | end if; | |
1961 | ||
30681738 RD |
1962 | -- Start the conversions |
1963 | ||
1964 | -- If this is not finished after Max_Iterations, give up and return an | |
1965 | -- empty string. | |
1966 | ||
1967 | for J in 1 .. Max_Iterations loop | |
1968 | ||
1969 | -- If we don't have an absolute pathname, prepend the directory | |
1970 | -- Reference_Dir. | |
1971 | ||
1972 | if Last = 1 | |
1973 | and then not Is_Absolute_Path (Path_Buffer (1 .. End_Path)) | |
1974 | then | |
aee21c6f EB |
1975 | declare |
1976 | Reference_Dir : constant String := Get_Directory (Directory); | |
1977 | Ref_Dir_Len : constant Natural := Reference_Dir'Length; | |
1978 | -- Current directory name specified and its length | |
1979 | ||
1980 | begin | |
1981 | Path_Buffer (Ref_Dir_Len + 1 .. Ref_Dir_Len + End_Path) := | |
30681738 | 1982 | Path_Buffer (1 .. End_Path); |
aee21c6f EB |
1983 | End_Path := Ref_Dir_Len + End_Path; |
1984 | Path_Buffer (1 .. Ref_Dir_Len) := Reference_Dir; | |
1985 | Last := Ref_Dir_Len; | |
1986 | end; | |
30681738 RD |
1987 | end if; |
1988 | ||
30681738 RD |
1989 | Start := Last + 1; |
1990 | Finish := Last; | |
1991 | ||
1992 | -- Ensure that Windows network drives are kept, e.g: \\server\drive-c | |
1993 | ||
1994 | if Start = 2 | |
1995 | and then Directory_Separator = '\' | |
1996 | and then Path_Buffer (1 .. 2) = "\\" | |
1997 | then | |
1998 | Start := 3; | |
1999 | end if; | |
2000 | ||
2001 | -- If we have traversed the full pathname, return it | |
2002 | ||
2003 | if Start > End_Path then | |
2004 | return Final_Value (Path_Buffer (1 .. End_Path)); | |
2005 | end if; | |
2006 | ||
2007 | -- Remove duplicate directory separators | |
2008 | ||
2009 | while Path_Buffer (Start) = Directory_Separator loop | |
2010 | if Start = End_Path then | |
2011 | return Final_Value (Path_Buffer (1 .. End_Path - 1)); | |
2012 | ||
2013 | else | |
2014 | Path_Buffer (Start .. End_Path - 1) := | |
2015 | Path_Buffer (Start + 1 .. End_Path); | |
2016 | End_Path := End_Path - 1; | |
2017 | end if; | |
2018 | end loop; | |
2019 | ||
2020 | -- Find the end of the current field: last character or the one | |
2021 | -- preceding the next directory separator. | |
2022 | ||
2023 | while Finish < End_Path | |
2024 | and then Path_Buffer (Finish + 1) /= Directory_Separator | |
2025 | loop | |
2026 | Finish := Finish + 1; | |
2027 | end loop; | |
2028 | ||
2029 | -- Remove "." field | |
2030 | ||
2031 | if Start = Finish and then Path_Buffer (Start) = '.' then | |
2032 | if Start = End_Path then | |
2033 | if Last = 1 then | |
2034 | return (1 => Directory_Separator); | |
2035 | else | |
2036 | ||
2037 | if Fold_To_Lower_Case then | |
2038 | System.Case_Util.To_Lower (Path_Buffer (1 .. Last - 1)); | |
2039 | end if; | |
2040 | ||
2041 | return Path_Buffer (1 .. Last - 1); | |
2042 | ||
2043 | end if; | |
2044 | ||
2045 | else | |
2046 | Path_Buffer (Last + 1 .. End_Path - 2) := | |
2047 | Path_Buffer (Last + 3 .. End_Path); | |
2048 | End_Path := End_Path - 2; | |
2049 | end if; | |
2050 | ||
2051 | -- Remove ".." fields | |
2052 | ||
2053 | elsif Finish = Start + 1 | |
2054 | and then Path_Buffer (Start .. Finish) = ".." | |
2055 | then | |
2056 | Start := Last; | |
2057 | loop | |
2058 | Start := Start - 1; | |
2059 | exit when Start < 1 or else | |
2060 | Path_Buffer (Start) = Directory_Separator; | |
2061 | end loop; | |
2062 | ||
2063 | if Start <= 1 then | |
2064 | if Finish = End_Path then | |
2065 | return (1 => Directory_Separator); | |
2066 | ||
2067 | else | |
2068 | Path_Buffer (1 .. End_Path - Finish) := | |
2069 | Path_Buffer (Finish + 1 .. End_Path); | |
2070 | End_Path := End_Path - Finish; | |
2071 | Last := 1; | |
2072 | end if; | |
2073 | ||
2074 | else | |
2075 | if Finish = End_Path then | |
2076 | return Final_Value (Path_Buffer (1 .. Start - 1)); | |
2077 | ||
2078 | else | |
2079 | Path_Buffer (Start + 1 .. Start + End_Path - Finish - 1) := | |
2080 | Path_Buffer (Finish + 2 .. End_Path); | |
2081 | End_Path := Start + End_Path - Finish - 1; | |
2082 | Last := Start; | |
2083 | end if; | |
2084 | end if; | |
2085 | ||
2086 | -- Check if current field is a symbolic link | |
2087 | ||
2088 | elsif Resolve_Links then | |
2089 | declare | |
2090 | Saved : constant Character := Path_Buffer (Finish + 1); | |
2091 | ||
2092 | begin | |
2093 | Path_Buffer (Finish + 1) := ASCII.NUL; | |
2094 | Status := Readlink (Path_Buffer'Address, | |
2095 | Link_Buffer'Address, | |
2096 | Link_Buffer'Length); | |
2097 | Path_Buffer (Finish + 1) := Saved; | |
2098 | end; | |
2099 | ||
2100 | -- Not a symbolic link, move to the next field, if any | |
2101 | ||
2102 | if Status <= 0 then | |
2103 | Last := Finish + 1; | |
2104 | ||
2105 | -- Replace symbolic link with its value | |
2106 | ||
2107 | else | |
2108 | if Is_Absolute_Path (Link_Buffer (1 .. Status)) then | |
2109 | Path_Buffer (Status + 1 .. End_Path - (Finish - Status)) := | |
2110 | Path_Buffer (Finish + 1 .. End_Path); | |
2111 | End_Path := End_Path - (Finish - Status); | |
2112 | Path_Buffer (1 .. Status) := Link_Buffer (1 .. Status); | |
2113 | Last := 1; | |
2114 | ||
2115 | else | |
2116 | Path_Buffer | |
2117 | (Last + Status + 1 .. End_Path - Finish + Last + Status) := | |
2118 | Path_Buffer (Finish + 1 .. End_Path); | |
2119 | End_Path := End_Path - Finish + Last + Status; | |
2120 | Path_Buffer (Last + 1 .. Last + Status) := | |
2121 | Link_Buffer (1 .. Status); | |
2122 | end if; | |
2123 | end if; | |
2124 | ||
2125 | else | |
2126 | Last := Finish + 1; | |
2127 | end if; | |
2128 | end loop; | |
2129 | ||
2130 | -- Too many iterations: give up | |
2131 | ||
2132 | -- This can happen when there is a circularity in the symbolic links: A | |
2133 | -- is a symbolic link for B, which itself is a symbolic link, and the | |
2134 | -- target of B or of another symbolic link target of B is A. In this | |
2135 | -- case, we return an empty string to indicate failure to resolve. | |
2136 | ||
2137 | return ""; | |
2138 | end Normalize_Pathname; | |
2139 | ||
2140 | --------------- | |
2141 | -- Open_Read -- | |
2142 | --------------- | |
2143 | ||
2144 | function Open_Read | |
2145 | (Name : C_File_Name; | |
2146 | Fmode : Mode) return File_Descriptor | |
2147 | is | |
2148 | function C_Open_Read | |
2149 | (Name : C_File_Name; | |
2150 | Fmode : Mode) return File_Descriptor; | |
2151 | pragma Import (C, C_Open_Read, "__gnat_open_read"); | |
2152 | begin | |
2153 | return C_Open_Read (Name, Fmode); | |
2154 | end Open_Read; | |
2155 | ||
2156 | function Open_Read | |
2157 | (Name : String; | |
2158 | Fmode : Mode) return File_Descriptor | |
2159 | is | |
2160 | C_Name : String (1 .. Name'Length + 1); | |
2161 | begin | |
2162 | C_Name (1 .. Name'Length) := Name; | |
2163 | C_Name (C_Name'Last) := ASCII.NUL; | |
2164 | return Open_Read (C_Name (C_Name'First)'Address, Fmode); | |
2165 | end Open_Read; | |
2166 | ||
2167 | --------------------- | |
2168 | -- Open_Read_Write -- | |
2169 | --------------------- | |
2170 | ||
2171 | function Open_Read_Write | |
2172 | (Name : C_File_Name; | |
2173 | Fmode : Mode) return File_Descriptor | |
2174 | is | |
2175 | function C_Open_Read_Write | |
2176 | (Name : C_File_Name; | |
2177 | Fmode : Mode) return File_Descriptor; | |
2178 | pragma Import (C, C_Open_Read_Write, "__gnat_open_rw"); | |
2179 | begin | |
2180 | return C_Open_Read_Write (Name, Fmode); | |
2181 | end Open_Read_Write; | |
2182 | ||
2183 | function Open_Read_Write | |
2184 | (Name : String; | |
2185 | Fmode : Mode) return File_Descriptor | |
2186 | is | |
2187 | C_Name : String (1 .. Name'Length + 1); | |
2188 | begin | |
2189 | C_Name (1 .. Name'Length) := Name; | |
2190 | C_Name (C_Name'Last) := ASCII.NUL; | |
2191 | return Open_Read_Write (C_Name (C_Name'First)'Address, Fmode); | |
2192 | end Open_Read_Write; | |
2193 | ||
33c423c8 AC |
2194 | ------------- |
2195 | -- OS_Exit -- | |
2196 | ------------- | |
2197 | ||
2198 | procedure OS_Exit (Status : Integer) is | |
2199 | begin | |
2200 | OS_Exit_Ptr (Status); | |
2201 | raise Program_Error; | |
2202 | end OS_Exit; | |
2203 | ||
2204 | --------------------- | |
2205 | -- OS_Exit_Default -- | |
2206 | --------------------- | |
2207 | ||
2208 | procedure OS_Exit_Default (Status : Integer) is | |
2209 | procedure GNAT_OS_Exit (Status : Integer); | |
2210 | pragma Import (C, GNAT_OS_Exit, "__gnat_os_exit"); | |
2211 | pragma No_Return (GNAT_OS_Exit); | |
2212 | begin | |
2213 | GNAT_OS_Exit (Status); | |
2214 | end OS_Exit_Default; | |
2215 | ||
30681738 RD |
2216 | -------------------- |
2217 | -- Pid_To_Integer -- | |
2218 | -------------------- | |
2219 | ||
2220 | function Pid_To_Integer (Pid : Process_Id) return Integer is | |
2221 | begin | |
2222 | return Integer (Pid); | |
2223 | end Pid_To_Integer; | |
2224 | ||
2225 | ---------- | |
2226 | -- Read -- | |
2227 | ---------- | |
2228 | ||
2229 | function Read | |
2230 | (FD : File_Descriptor; | |
2231 | A : System.Address; | |
2232 | N : Integer) return Integer | |
2233 | is | |
2234 | begin | |
2235 | return Integer (System.CRTL.read | |
2236 | (System.CRTL.int (FD), System.CRTL.chars (A), System.CRTL.int (N))); | |
2237 | end Read; | |
2238 | ||
2239 | ----------------- | |
2240 | -- Rename_File -- | |
2241 | ----------------- | |
2242 | ||
2243 | procedure Rename_File | |
2244 | (Old_Name : C_File_Name; | |
2245 | New_Name : C_File_Name; | |
2246 | Success : out Boolean) | |
2247 | is | |
2248 | function rename (From, To : Address) return Integer; | |
55cc1a05 | 2249 | pragma Import (C, rename, "__gnat_rename"); |
30681738 RD |
2250 | R : Integer; |
2251 | begin | |
2252 | R := rename (Old_Name, New_Name); | |
2253 | Success := (R = 0); | |
2254 | end Rename_File; | |
2255 | ||
2256 | procedure Rename_File | |
2257 | (Old_Name : String; | |
2258 | New_Name : String; | |
2259 | Success : out Boolean) | |
2260 | is | |
2261 | C_Old_Name : String (1 .. Old_Name'Length + 1); | |
2262 | C_New_Name : String (1 .. New_Name'Length + 1); | |
2263 | begin | |
2264 | C_Old_Name (1 .. Old_Name'Length) := Old_Name; | |
2265 | C_Old_Name (C_Old_Name'Last) := ASCII.NUL; | |
2266 | C_New_Name (1 .. New_Name'Length) := New_Name; | |
2267 | C_New_Name (C_New_Name'Last) := ASCII.NUL; | |
2268 | Rename_File (C_Old_Name'Address, C_New_Name'Address, Success); | |
2269 | end Rename_File; | |
2270 | ||
2271 | ----------------------- | |
2272 | -- Set_Close_On_Exec -- | |
2273 | ----------------------- | |
2274 | ||
2275 | procedure Set_Close_On_Exec | |
2276 | (FD : File_Descriptor; | |
2277 | Close_On_Exec : Boolean; | |
2278 | Status : out Boolean) | |
2279 | is | |
2280 | function C_Set_Close_On_Exec | |
2281 | (FD : File_Descriptor; Close_On_Exec : System.CRTL.int) | |
2282 | return System.CRTL.int; | |
2283 | pragma Import (C, C_Set_Close_On_Exec, "__gnat_set_close_on_exec"); | |
2284 | begin | |
2285 | Status := C_Set_Close_On_Exec (FD, Boolean'Pos (Close_On_Exec)) = 0; | |
2286 | end Set_Close_On_Exec; | |
2287 | ||
2288 | -------------------- | |
2289 | -- Set_Executable -- | |
2290 | -------------------- | |
2291 | ||
2292 | procedure Set_Executable (Name : String) is | |
2293 | procedure C_Set_Executable (Name : C_File_Name); | |
2294 | pragma Import (C, C_Set_Executable, "__gnat_set_executable"); | |
2295 | C_Name : aliased String (Name'First .. Name'Last + 1); | |
2296 | begin | |
2297 | C_Name (Name'Range) := Name; | |
2298 | C_Name (C_Name'Last) := ASCII.NUL; | |
2299 | C_Set_Executable (C_Name (C_Name'First)'Address); | |
2300 | end Set_Executable; | |
2301 | ||
43540ec6 AC |
2302 | ---------------------- |
2303 | -- Set_Non_Readable -- | |
2304 | ---------------------- | |
2305 | ||
2306 | procedure Set_Non_Readable (Name : String) is | |
2307 | procedure C_Set_Non_Readable (Name : C_File_Name); | |
2308 | pragma Import (C, C_Set_Non_Readable, "__gnat_set_non_readable"); | |
2309 | C_Name : aliased String (Name'First .. Name'Last + 1); | |
2310 | begin | |
2311 | C_Name (Name'Range) := Name; | |
2312 | C_Name (C_Name'Last) := ASCII.NUL; | |
2313 | C_Set_Non_Readable (C_Name (C_Name'First)'Address); | |
2314 | end Set_Non_Readable; | |
2315 | ||
2316 | ---------------------- | |
2317 | -- Set_Non_Writable -- | |
2318 | ---------------------- | |
2319 | ||
2320 | procedure Set_Non_Writable (Name : String) is | |
2321 | procedure C_Set_Non_Writable (Name : C_File_Name); | |
2322 | pragma Import (C, C_Set_Non_Writable, "__gnat_set_non_writable"); | |
2323 | C_Name : aliased String (Name'First .. Name'Last + 1); | |
2324 | begin | |
2325 | C_Name (Name'Range) := Name; | |
2326 | C_Name (C_Name'Last) := ASCII.NUL; | |
2327 | C_Set_Non_Writable (C_Name (C_Name'First)'Address); | |
2328 | end Set_Non_Writable; | |
2329 | ||
2330 | ------------------ | |
2331 | -- Set_Readable -- | |
2332 | ------------------ | |
2333 | ||
2334 | procedure Set_Readable (Name : String) is | |
2335 | procedure C_Set_Readable (Name : C_File_Name); | |
2336 | pragma Import (C, C_Set_Readable, "__gnat_set_readable"); | |
2337 | C_Name : aliased String (Name'First .. Name'Last + 1); | |
2338 | begin | |
2339 | C_Name (Name'Range) := Name; | |
2340 | C_Name (C_Name'Last) := ASCII.NUL; | |
2341 | C_Set_Readable (C_Name (C_Name'First)'Address); | |
2342 | end Set_Readable; | |
2343 | ||
30681738 RD |
2344 | -------------------- |
2345 | -- Set_Writable -- | |
2346 | -------------------- | |
2347 | ||
2348 | procedure Set_Writable (Name : String) is | |
2349 | procedure C_Set_Writable (Name : C_File_Name); | |
2350 | pragma Import (C, C_Set_Writable, "__gnat_set_writable"); | |
2351 | C_Name : aliased String (Name'First .. Name'Last + 1); | |
2352 | begin | |
2353 | C_Name (Name'Range) := Name; | |
2354 | C_Name (C_Name'Last) := ASCII.NUL; | |
2355 | C_Set_Writable (C_Name (C_Name'First)'Address); | |
2356 | end Set_Writable; | |
2357 | ||
2358 | ------------ | |
2359 | -- Setenv -- | |
2360 | ------------ | |
2361 | ||
2362 | procedure Setenv (Name : String; Value : String) is | |
2363 | F_Name : String (1 .. Name'Length + 1); | |
2364 | F_Value : String (1 .. Value'Length + 1); | |
2365 | ||
2366 | procedure Set_Env_Value (Name, Value : System.Address); | |
2367 | pragma Import (C, Set_Env_Value, "__gnat_setenv"); | |
2368 | ||
2369 | begin | |
2370 | F_Name (1 .. Name'Length) := Name; | |
2371 | F_Name (F_Name'Last) := ASCII.NUL; | |
2372 | ||
2373 | F_Value (1 .. Value'Length) := Value; | |
2374 | F_Value (F_Value'Last) := ASCII.NUL; | |
2375 | ||
2376 | Set_Env_Value (F_Name'Address, F_Value'Address); | |
2377 | end Setenv; | |
2378 | ||
2379 | ----------- | |
2380 | -- Spawn -- | |
2381 | ----------- | |
2382 | ||
2383 | function Spawn | |
2384 | (Program_Name : String; | |
2385 | Args : Argument_List) return Integer | |
2386 | is | |
30681738 | 2387 | Result : Integer; |
67ce0d7e RD |
2388 | Junk : Process_Id; |
2389 | pragma Warnings (Off, Junk); | |
30681738 RD |
2390 | begin |
2391 | Spawn_Internal (Program_Name, Args, Result, Junk, Blocking => True); | |
2392 | return Result; | |
2393 | end Spawn; | |
2394 | ||
2395 | procedure Spawn | |
2396 | (Program_Name : String; | |
2397 | Args : Argument_List; | |
2398 | Success : out Boolean) | |
2399 | is | |
2400 | begin | |
2401 | Success := (Spawn (Program_Name, Args) = 0); | |
2402 | end Spawn; | |
2403 | ||
2404 | procedure Spawn | |
2405 | (Program_Name : String; | |
2406 | Args : Argument_List; | |
2407 | Output_File_Descriptor : File_Descriptor; | |
2408 | Return_Code : out Integer; | |
2409 | Err_To_Out : Boolean := True) | |
2410 | is | |
2411 | Saved_Output : File_Descriptor; | |
2412 | Saved_Error : File_Descriptor := Invalid_FD; -- prevent compiler warning | |
2413 | ||
2414 | begin | |
2415 | -- Set standard output and error to the temporary file | |
2416 | ||
2417 | Saved_Output := Dup (Standout); | |
2418 | Dup2 (Output_File_Descriptor, Standout); | |
2419 | ||
2420 | if Err_To_Out then | |
2421 | Saved_Error := Dup (Standerr); | |
2422 | Dup2 (Output_File_Descriptor, Standerr); | |
2423 | end if; | |
2424 | ||
2425 | -- Spawn the program | |
2426 | ||
2427 | Return_Code := Spawn (Program_Name, Args); | |
2428 | ||
2429 | -- Restore the standard output and error | |
2430 | ||
2431 | Dup2 (Saved_Output, Standout); | |
2432 | ||
2433 | if Err_To_Out then | |
2434 | Dup2 (Saved_Error, Standerr); | |
2435 | end if; | |
2436 | ||
2437 | -- And close the saved standard output and error file descriptors | |
2438 | ||
2439 | Close (Saved_Output); | |
2440 | ||
2441 | if Err_To_Out then | |
2442 | Close (Saved_Error); | |
2443 | end if; | |
2444 | end Spawn; | |
2445 | ||
2446 | procedure Spawn | |
8b79ad42 AC |
2447 | (Program_Name : String; |
2448 | Args : Argument_List; | |
2449 | Output_File : String; | |
2450 | Success : out Boolean; | |
2451 | Return_Code : out Integer; | |
2452 | Err_To_Out : Boolean := True) | |
30681738 RD |
2453 | is |
2454 | FD : File_Descriptor; | |
2455 | ||
2456 | begin | |
2457 | Success := True; | |
2458 | Return_Code := 0; | |
2459 | ||
2460 | FD := Create_Output_Text_File (Output_File); | |
2461 | ||
2462 | if FD = Invalid_FD then | |
2463 | Success := False; | |
2464 | return; | |
2465 | end if; | |
2466 | ||
2467 | Spawn (Program_Name, Args, FD, Return_Code, Err_To_Out); | |
2468 | ||
2469 | Close (FD, Success); | |
2470 | end Spawn; | |
2471 | ||
2472 | -------------------- | |
2473 | -- Spawn_Internal -- | |
2474 | -------------------- | |
2475 | ||
2476 | procedure Spawn_Internal | |
2477 | (Program_Name : String; | |
2478 | Args : Argument_List; | |
2479 | Result : out Integer; | |
2480 | Pid : out Process_Id; | |
2481 | Blocking : Boolean) | |
2482 | is | |
2483 | ||
2484 | procedure Spawn (Args : Argument_List); | |
2485 | -- Call Spawn with given argument list | |
2486 | ||
2487 | N_Args : Argument_List (Args'Range); | |
2488 | -- Normalized arguments | |
2489 | ||
2490 | ----------- | |
2491 | -- Spawn -- | |
2492 | ----------- | |
2493 | ||
2494 | procedure Spawn (Args : Argument_List) is | |
2495 | type Chars is array (Positive range <>) of aliased Character; | |
2496 | type Char_Ptr is access constant Character; | |
2497 | ||
8b79ad42 AC |
2498 | Command_Len : constant Positive := Program_Name'Length + 1 |
2499 | + Args_Length (Args); | |
30681738 | 2500 | Command_Last : Natural := 0; |
8b79ad42 | 2501 | Command : aliased Chars (1 .. Command_Len); |
30681738 | 2502 | -- Command contains all characters of the Program_Name and Args, all |
d61f428e | 2503 | -- terminated by ASCII.NUL characters. |
30681738 | 2504 | |
8b79ad42 | 2505 | Arg_List_Len : constant Positive := Args'Length + 2; |
30681738 | 2506 | Arg_List_Last : Natural := 0; |
8b79ad42 | 2507 | Arg_List : aliased array (1 .. Arg_List_Len) of Char_Ptr; |
30681738 RD |
2508 | -- List with pointers to NUL-terminated strings of the Program_Name |
2509 | -- and the Args and terminated with a null pointer. We rely on the | |
2510 | -- default initialization for the last null pointer. | |
2511 | ||
2512 | procedure Add_To_Command (S : String); | |
2513 | -- Add S and a NUL character to Command, updating Last | |
2514 | ||
2515 | function Portable_Spawn (Args : Address) return Integer; | |
2516 | pragma Import (C, Portable_Spawn, "__gnat_portable_spawn"); | |
2517 | ||
2518 | function Portable_No_Block_Spawn (Args : Address) return Process_Id; | |
2519 | pragma Import | |
2520 | (C, Portable_No_Block_Spawn, "__gnat_portable_no_block_spawn"); | |
2521 | ||
2522 | -------------------- | |
2523 | -- Add_To_Command -- | |
2524 | -------------------- | |
2525 | ||
2526 | procedure Add_To_Command (S : String) is | |
2527 | First : constant Natural := Command_Last + 1; | |
2528 | ||
2529 | begin | |
2530 | Command_Last := Command_Last + S'Length; | |
2531 | ||
2532 | -- Move characters one at a time, because Command has aliased | |
2533 | -- components. | |
2534 | ||
2535 | -- But not volatile, so why is this necessary ??? | |
2536 | ||
2537 | for J in S'Range loop | |
2538 | Command (First + J - S'First) := S (J); | |
2539 | end loop; | |
2540 | ||
2541 | Command_Last := Command_Last + 1; | |
2542 | Command (Command_Last) := ASCII.NUL; | |
2543 | ||
2544 | Arg_List_Last := Arg_List_Last + 1; | |
2545 | Arg_List (Arg_List_Last) := Command (First)'Access; | |
2546 | end Add_To_Command; | |
2547 | ||
2548 | -- Start of processing for Spawn | |
2549 | ||
2550 | begin | |
2551 | Add_To_Command (Program_Name); | |
2552 | ||
2553 | for J in Args'Range loop | |
2554 | Add_To_Command (Args (J).all); | |
2555 | end loop; | |
2556 | ||
2557 | if Blocking then | |
2558 | Pid := Invalid_Pid; | |
2559 | Result := Portable_Spawn (Arg_List'Address); | |
2560 | else | |
2561 | Pid := Portable_No_Block_Spawn (Arg_List'Address); | |
2562 | Result := Boolean'Pos (Pid /= Invalid_Pid); | |
2563 | end if; | |
2564 | end Spawn; | |
2565 | ||
2566 | -- Start of processing for Spawn_Internal | |
2567 | ||
2568 | begin | |
2569 | -- Copy arguments into a local structure | |
2570 | ||
2571 | for K in N_Args'Range loop | |
2572 | N_Args (K) := new String'(Args (K).all); | |
2573 | end loop; | |
2574 | ||
2575 | -- Normalize those arguments | |
2576 | ||
2577 | Normalize_Arguments (N_Args); | |
2578 | ||
2579 | -- Call spawn using the normalized arguments | |
2580 | ||
2581 | Spawn (N_Args); | |
2582 | ||
2583 | -- Free arguments list | |
2584 | ||
2585 | for K in N_Args'Range loop | |
2586 | Free (N_Args (K)); | |
2587 | end loop; | |
2588 | end Spawn_Internal; | |
2589 | ||
2590 | --------------------------- | |
2591 | -- To_Path_String_Access -- | |
2592 | --------------------------- | |
2593 | ||
2594 | function To_Path_String_Access | |
2595 | (Path_Addr : Address; | |
2596 | Path_Len : Integer) return String_Access | |
2597 | is | |
2598 | subtype Path_String is String (1 .. Path_Len); | |
2599 | type Path_String_Access is access Path_String; | |
2600 | ||
8b79ad42 AC |
2601 | function Address_To_Access is new Ada.Unchecked_Conversion |
2602 | (Source => Address, Target => Path_String_Access); | |
30681738 RD |
2603 | |
2604 | Path_Access : constant Path_String_Access := | |
2605 | Address_To_Access (Path_Addr); | |
2606 | ||
2607 | Return_Val : String_Access; | |
2608 | ||
2609 | begin | |
2610 | Return_Val := new String (1 .. Path_Len); | |
2611 | ||
2612 | for J in 1 .. Path_Len loop | |
2613 | Return_Val (J) := Path_Access (J); | |
2614 | end loop; | |
2615 | ||
2616 | return Return_Val; | |
2617 | end To_Path_String_Access; | |
2618 | ||
2619 | ------------------ | |
2620 | -- Wait_Process -- | |
2621 | ------------------ | |
2622 | ||
2623 | procedure Wait_Process (Pid : out Process_Id; Success : out Boolean) is | |
2624 | Status : Integer; | |
2625 | ||
2626 | function Portable_Wait (S : Address) return Process_Id; | |
2627 | pragma Import (C, Portable_Wait, "__gnat_portable_wait"); | |
2628 | ||
2629 | begin | |
2630 | Pid := Portable_Wait (Status'Address); | |
2631 | Success := (Status = 0); | |
2632 | end Wait_Process; | |
2633 | ||
2634 | ----------- | |
2635 | -- Write -- | |
2636 | ----------- | |
2637 | ||
2638 | function Write | |
2639 | (FD : File_Descriptor; | |
2640 | A : System.Address; | |
2641 | N : Integer) return Integer | |
2642 | is | |
2643 | begin | |
2644 | return Integer (System.CRTL.write | |
2645 | (System.CRTL.int (FD), System.CRTL.chars (A), System.CRTL.int (N))); | |
2646 | end Write; | |
2647 | ||
2648 | end System.OS_Lib; |