1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
5 -- G N A T . O S _ L I B --
9 -- Copyright (C) 1995-2004 Ada Core Technologies, Inc. --
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, 59 Temple Place - Suite 330, Boston, --
20 -- MA 02111-1307, USA. --
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. --
29 -- GNAT was originally developed by the GNAT team at New York University. --
30 -- Extensive contributions were provided by Ada Core Technologies Inc. --
32 ------------------------------------------------------------------------------
34 with System.Case_Util;
36 with System.Soft_Links;
37 with Unchecked_Conversion;
38 with System; use System;
40 package body GNAT.OS_Lib is
42 package SSL renames System.Soft_Links;
44 -- The following are used by Create_Temp_File
46 Current_Temp_File_Name : String := "GNAT-TEMP-000000.TMP";
47 -- Name of the temp file last created
49 Temp_File_Name_Last_Digit : constant Positive :=
50 Current_Temp_File_Name'Last - 4;
51 -- Position of the last digit in Current_Temp_File_Name
53 Max_Attempts : constant := 100;
54 -- The maximum number of attempts to create a new temp file
56 -----------------------
57 -- Local Subprograms --
58 -----------------------
60 function Args_Length (Args : Argument_List) return Natural;
61 -- Returns total number of characters needed to create a string
62 -- of all Args terminated by ASCII.NUL characters
64 function C_String_Length (S : Address) return Integer;
65 -- Returns the length of a C string. Does check for null address
68 procedure Spawn_Internal
69 (Program_Name : String;
74 -- Internal routine to implement the two Spawn (blocking/non blocking)
75 -- routines. If Blocking is set to True then the spawn is blocking
76 -- otherwise it is non blocking. In this latter case the Pid contains
77 -- the process id number. The first three parameters are as in Spawn.
78 -- Note that Spawn_Internal normalizes the argument list before calling
79 -- the low level system spawn routines (see Normalize_Arguments). Note
80 -- that Normalize_Arguments is designed to do nothing if it is called
81 -- more than once, so calling Normalize_Arguments before calling one
82 -- of the spawn routines is fine.
84 function To_Path_String_Access
86 Path_Len : Integer) return String_Access;
87 -- Converts a C String to an Ada String. We could do this making use of
88 -- Interfaces.C.Strings but we prefer not to import that entire package
94 function "<" (X, Y : OS_Time) return Boolean is
96 return Long_Integer (X) < Long_Integer (Y);
103 function "<=" (X, Y : OS_Time) return Boolean is
105 return Long_Integer (X) <= Long_Integer (Y);
112 function ">" (X, Y : OS_Time) return Boolean is
114 return Long_Integer (X) > Long_Integer (Y);
121 function ">=" (X, Y : OS_Time) return Boolean is
123 return Long_Integer (X) >= Long_Integer (Y);
130 function Args_Length (Args : Argument_List) return Natural is
134 for J in Args'Range loop
135 Len := Len + Args (J)'Length + 1; -- One extra for ASCII.NUL
141 -----------------------------
142 -- Argument_String_To_List --
143 -----------------------------
145 function Argument_String_To_List
146 (Arg_String : String) return Argument_List_Access
148 Max_Args : constant Integer := Arg_String'Length;
149 New_Argv : Argument_List (1 .. Max_Args);
150 New_Argc : Natural := 0;
154 Idx := Arg_String'First;
157 exit when Idx > Arg_String'Last;
160 Quoted : Boolean := False;
161 Backqd : Boolean := False;
168 -- An unquoted space is the end of an argument
170 if not (Backqd or Quoted)
171 and then Arg_String (Idx) = ' '
175 -- Start of a quoted string
177 elsif not (Backqd or Quoted)
178 and then Arg_String (Idx) = '"'
182 -- End of a quoted string and end of an argument
184 elsif (Quoted and not Backqd)
185 and then Arg_String (Idx) = '"'
190 -- Following character is backquoted
192 elsif Arg_String (Idx) = '\' then
195 -- Turn off backquoting after advancing one character
203 exit when Idx > Arg_String'Last;
208 New_Argc := New_Argc + 1;
209 New_Argv (New_Argc) :=
210 new String'(Arg_String (Old_Idx .. Idx - 1));
212 -- Skip extraneous spaces
214 while Idx <= Arg_String'Last and then Arg_String (Idx) = ' ' loop
220 return new Argument_List'(New_Argv (1 .. New_Argc));
221 end Argument_String_To_List;
223 ---------------------
224 -- C_String_Length --
225 ---------------------
227 function C_String_Length (S : Address) return Integer is
229 function Strlen (S : Address) return Integer;
230 pragma Import (C, Strlen, "strlen");
233 if S = Null_Address then
244 procedure Close (FD : File_Descriptor) is
245 procedure C_Close (FD : File_Descriptor);
246 pragma Import (C, C_Close, "close");
251 procedure Close (FD : File_Descriptor; Status : out Boolean) is
252 function C_Close (FD : File_Descriptor) return Integer;
253 pragma Import (C, C_Close, "close");
255 Status := (C_Close (FD) = 0);
265 Success : out Boolean;
266 Mode : Copy_Mode := Copy;
267 Preserve : Attribute := Time_Stamps)
269 From : File_Descriptor;
270 To : File_Descriptor;
272 Copy_Error : exception;
273 -- Internal exception raised to signal error in copy
275 function Build_Path (Dir : String; File : String) return String;
276 -- Returns pathname Dir catenated with File adding the directory
277 -- separator only if needed.
279 procedure Copy (From, To : File_Descriptor);
280 -- Read data from From and place them into To. In both cases the
281 -- operations uses the current file position. Raises Constraint_Error
282 -- if a problem occurs during the copy.
284 procedure Copy_To (To_Name : String);
285 -- Does a straight copy from source to designated destination file
291 function Build_Path (Dir : String; File : String) return String is
292 Res : String (1 .. Dir'Length + File'Length + 1);
294 Base_File_Ptr : Integer;
295 -- The base file name is File (Base_File_Ptr + 1 .. File'Last)
297 function Is_Dirsep (C : Character) return Boolean;
298 pragma Inline (Is_Dirsep);
299 -- Returns True if C is a directory separator. On Windows we
300 -- handle both styles of directory separator.
306 function Is_Dirsep (C : Character) return Boolean is
308 return C = Directory_Separator or else C = '/';
312 -- Find base file name
314 Base_File_Ptr := File'Last;
315 while Base_File_Ptr >= File'First loop
316 exit when Is_Dirsep (File (Base_File_Ptr));
317 Base_File_Ptr := Base_File_Ptr - 1;
321 Base_File : String renames
322 File (Base_File_Ptr + 1 .. File'Last);
325 Res (1 .. Dir'Length) := Dir;
327 if Is_Dirsep (Dir (Dir'Last)) then
328 Res (Dir'Length + 1 .. Dir'Length + Base_File'Length) :=
330 return Res (1 .. Dir'Length + Base_File'Length);
333 Res (Dir'Length + 1) := Directory_Separator;
334 Res (Dir'Length + 2 .. Dir'Length + 1 + Base_File'Length) :=
336 return Res (1 .. Dir'Length + 1 + Base_File'Length);
345 procedure Copy (From, To : File_Descriptor) is
346 Buf_Size : constant := 200_000;
347 Buffer : array (1 .. Buf_Size) of Character;
351 Status_From : Boolean;
353 -- Statuses for the calls to Close
356 if From = Invalid_FD or else To = Invalid_FD then
361 R := Read (From, Buffer (1)'Address, Buf_Size);
363 -- For VMS, the buffer may not be full. So, we need to try again
364 -- until there is nothing to read.
368 W := Write (To, Buffer (1)'Address, R);
372 -- Problem writing data, could be a disk full. Close files
373 -- without worrying about status, since we are raising a
374 -- Copy_Error exception in any case.
376 Close (From, Status_From);
377 Close (To, Status_To);
383 Close (From, Status_From);
384 Close (To, Status_To);
386 if not (Status_From and Status_To) then
395 procedure Copy_To (To_Name : String) is
397 function Copy_Attributes
398 (From, To : System.Address;
399 Mode : Integer) return Integer;
400 pragma Import (C, Copy_Attributes, "__gnat_copy_attribs");
401 -- Mode = 0 - copy only time stamps.
402 -- Mode = 1 - copy time stamps and read/write/execute attributes
404 C_From : String (1 .. Name'Length + 1);
405 C_To : String (1 .. To_Name'Length + 1);
408 From := Open_Read (Name, Binary);
409 To := Create_File (To_Name, Binary);
414 C_From (1 .. Name'Length) := Name;
415 C_From (C_From'Last) := ASCII.Nul;
417 C_To (1 .. To_Name'Length) := To_Name;
418 C_To (C_To'Last) := ASCII.Nul;
423 if Copy_Attributes (C_From'Address, C_To'Address, 0) = -1 then
428 if Copy_Attributes (C_From'Address, C_To'Address, 1) = -1 then
438 -- Start of processing for Copy_File
443 -- The source file must exist
445 if not Is_Regular_File (Name) then
449 -- The source file exists
453 -- Copy case, target file must not exist
457 -- If the target file exists, we have an error
459 if Is_Regular_File (Pathname) then
462 -- Case of target is a directory
464 elsif Is_Directory (Pathname) then
466 Dest : constant String := Build_Path (Pathname, Name);
469 -- If the target file exists, we have an error
470 -- otherwise do the copy.
472 if Is_Regular_File (Dest) then
479 -- Case of normal copy to file (destination does not exist)
485 -- Overwrite case, destination file may or may not exist
488 if Is_Directory (Pathname) then
489 Copy_To (Build_Path (Pathname, Name));
494 -- Appending case, destination file may or may not exist
498 -- Appending to existing file
500 if Is_Regular_File (Pathname) then
502 -- Append mode and destination file exists, append data
503 -- at the end of Pathname.
505 From := Open_Read (Name, Binary);
506 To := Open_Read_Write (Pathname, Binary);
507 Lseek (To, 0, Seek_End);
511 -- Appending to directory, not allowed
513 elsif Is_Directory (Pathname) then
516 -- Appending when target file does not exist
523 -- All error cases are caught here
532 Pathname : C_File_Name;
533 Success : out Boolean;
534 Mode : Copy_Mode := Copy;
535 Preserve : Attribute := Time_Stamps)
537 Ada_Name : String_Access :=
538 To_Path_String_Access
539 (Name, C_String_Length (Name));
541 Ada_Pathname : String_Access :=
542 To_Path_String_Access
543 (Pathname, C_String_Length (Pathname));
546 Copy_File (Ada_Name.all, Ada_Pathname.all, Success, Mode, Preserve);
551 ----------------------
552 -- Copy_Time_Stamps --
553 ----------------------
555 procedure Copy_Time_Stamps (Source, Dest : String; Success : out Boolean) is
557 function Copy_Attributes
558 (From, To : System.Address;
559 Mode : Integer) return Integer;
560 pragma Import (C, Copy_Attributes, "__gnat_copy_attribs");
561 -- Mode = 0 - copy only time stamps.
562 -- Mode = 1 - copy time stamps and read/write/execute attributes
565 if Is_Regular_File (Source) and then Is_Writable_File (Dest) then
567 C_Source : String (1 .. Source'Length + 1);
568 C_Dest : String (1 .. Dest'Length + 1);
570 C_Source (1 .. C_Source'Length) := Source;
571 C_Source (C_Source'Last) := ASCII.Nul;
573 C_Dest (1 .. C_Dest'Length) := Dest;
574 C_Dest (C_Dest'Last) := ASCII.Nul;
576 if Copy_Attributes (C_Source'Address, C_Dest'Address, 0) = -1 then
586 end Copy_Time_Stamps;
588 procedure Copy_Time_Stamps
589 (Source, Dest : C_File_Name;
590 Success : out Boolean)
592 Ada_Source : String_Access :=
593 To_Path_String_Access
594 (Source, C_String_Length (Source));
596 Ada_Dest : String_Access :=
597 To_Path_String_Access
598 (Dest, C_String_Length (Dest));
600 Copy_Time_Stamps (Ada_Source.all, Ada_Dest.all, Success);
603 end Copy_Time_Stamps;
611 Fmode : Mode) return File_Descriptor
613 function C_Create_File
615 Fmode : Mode) return File_Descriptor;
616 pragma Import (C, C_Create_File, "__gnat_open_create");
619 return C_Create_File (Name, Fmode);
624 Fmode : Mode) return File_Descriptor
626 C_Name : String (1 .. Name'Length + 1);
629 C_Name (1 .. Name'Length) := Name;
630 C_Name (C_Name'Last) := ASCII.NUL;
631 return Create_File (C_Name (C_Name'First)'Address, Fmode);
634 ---------------------
635 -- Create_New_File --
636 ---------------------
638 function Create_New_File
640 Fmode : Mode) return File_Descriptor
642 function C_Create_New_File
644 Fmode : Mode) return File_Descriptor;
645 pragma Import (C, C_Create_New_File, "__gnat_open_new");
648 return C_Create_New_File (Name, Fmode);
651 function Create_New_File
653 Fmode : Mode) return File_Descriptor
655 C_Name : String (1 .. Name'Length + 1);
658 C_Name (1 .. Name'Length) := Name;
659 C_Name (C_Name'Last) := ASCII.NUL;
660 return Create_New_File (C_Name (C_Name'First)'Address, Fmode);
663 -----------------------------
664 -- Create_Output_Text_File --
665 -----------------------------
667 function Create_Output_Text_File (Name : String) return File_Descriptor is
668 function C_Create_File
669 (Name : C_File_Name) return File_Descriptor;
670 pragma Import (C, C_Create_File, "__gnat_create_output_file");
672 C_Name : String (1 .. Name'Length + 1);
675 C_Name (1 .. Name'Length) := Name;
676 C_Name (C_Name'Last) := ASCII.NUL;
677 return C_Create_File (C_Name (C_Name'First)'Address);
678 end Create_Output_Text_File;
680 ----------------------
681 -- Create_Temp_File --
682 ----------------------
684 procedure Create_Temp_File
685 (FD : out File_Descriptor;
686 Name : out Temp_File_Name)
688 function Open_New_Temp
689 (Name : System.Address;
690 Fmode : Mode) return File_Descriptor;
691 pragma Import (C, Open_New_Temp, "__gnat_open_new_temp");
694 FD := Open_New_Temp (Name'Address, Binary);
695 end Create_Temp_File;
697 procedure Create_Temp_File
698 (FD : out File_Descriptor;
699 Name : out String_Access)
702 Attempts : Natural := 0;
703 Current : String (Current_Temp_File_Name'Range);
706 -- Loop until a new temp file can be created
710 -- We need to protect global variable Current_Temp_File_Name
711 -- against concurrent access by different tasks.
715 -- Start at the last digit
717 Pos := Temp_File_Name_Last_Digit;
721 -- Increment the digit by one
723 case Current_Temp_File_Name (Pos) is
725 Current_Temp_File_Name (Pos) :=
726 Character'Succ (Current_Temp_File_Name (Pos));
731 -- For 9, set the digit to 0 and go to the previous digit
733 Current_Temp_File_Name (Pos) := '0';
738 -- If it is not a digit, then there are no available
739 -- temp file names. Return Invalid_FD. There is almost
740 -- no that this code will be ever be executed, since
741 -- it would mean that there are one million temp files
742 -- in the same directory!
751 Current := Current_Temp_File_Name;
753 -- We can now release the lock, because we are no longer
754 -- accessing Current_Temp_File_Name.
764 -- Attempt to create the file
766 FD := Create_New_File (Current, Binary);
768 if FD /= Invalid_FD then
769 Name := new String'(Current);
773 if not Is_Regular_File (Current) then
775 -- If the file does not already exist and we are unable to create
776 -- it, we give up after Max_Attempts. Otherwise, we try again with
777 -- the next available file name.
779 Attempts := Attempts + 1;
781 if Attempts >= Max_Attempts then
788 end Create_Temp_File;
794 procedure Delete_File (Name : Address; Success : out Boolean) is
797 function unlink (A : Address) return Integer;
798 pragma Import (C, unlink, "unlink");
805 procedure Delete_File (Name : String; Success : out Boolean) is
806 C_Name : String (1 .. Name'Length + 1);
809 C_Name (1 .. Name'Length) := Name;
810 C_Name (C_Name'Last) := ASCII.NUL;
812 Delete_File (C_Name'Address, Success);
815 ---------------------
816 -- File_Time_Stamp --
817 ---------------------
819 function File_Time_Stamp (FD : File_Descriptor) return OS_Time is
820 function File_Time (FD : File_Descriptor) return OS_Time;
821 pragma Import (C, File_Time, "__gnat_file_time_fd");
824 return File_Time (FD);
827 function File_Time_Stamp (Name : C_File_Name) return OS_Time is
828 function File_Time (Name : Address) return OS_Time;
829 pragma Import (C, File_Time, "__gnat_file_time_name");
832 return File_Time (Name);
835 function File_Time_Stamp (Name : String) return OS_Time is
836 F_Name : String (1 .. Name'Length + 1);
839 F_Name (1 .. Name'Length) := Name;
840 F_Name (F_Name'Last) := ASCII.NUL;
841 return File_Time_Stamp (F_Name'Address);
844 ---------------------------
845 -- Get_Debuggable_Suffix --
846 ---------------------------
848 function Get_Debuggable_Suffix return String_Access is
849 procedure Get_Suffix_Ptr (Length, Ptr : Address);
850 pragma Import (C, Get_Suffix_Ptr, "__gnat_get_debuggable_suffix_ptr");
852 procedure Strncpy (Astring_Addr, Cstring : Address; N : Integer);
853 pragma Import (C, Strncpy, "strncpy");
855 Suffix_Ptr : Address;
856 Suffix_Length : Integer;
857 Result : String_Access;
860 Get_Suffix_Ptr (Suffix_Length'Address, Suffix_Ptr'Address);
862 Result := new String (1 .. Suffix_Length);
864 if Suffix_Length > 0 then
865 Strncpy (Result.all'Address, Suffix_Ptr, Suffix_Length);
869 end Get_Debuggable_Suffix;
871 ---------------------------
872 -- Get_Executable_Suffix --
873 ---------------------------
875 function Get_Executable_Suffix return String_Access is
876 procedure Get_Suffix_Ptr (Length, Ptr : Address);
877 pragma Import (C, Get_Suffix_Ptr, "__gnat_get_executable_suffix_ptr");
879 procedure Strncpy (Astring_Addr, Cstring : Address; N : Integer);
880 pragma Import (C, Strncpy, "strncpy");
882 Suffix_Ptr : Address;
883 Suffix_Length : Integer;
884 Result : String_Access;
887 Get_Suffix_Ptr (Suffix_Length'Address, Suffix_Ptr'Address);
889 Result := new String (1 .. Suffix_Length);
891 if Suffix_Length > 0 then
892 Strncpy (Result.all'Address, Suffix_Ptr, Suffix_Length);
896 end Get_Executable_Suffix;
898 -----------------------
899 -- Get_Object_Suffix --
900 -----------------------
902 function Get_Object_Suffix return String_Access is
903 procedure Get_Suffix_Ptr (Length, Ptr : Address);
904 pragma Import (C, Get_Suffix_Ptr, "__gnat_get_object_suffix_ptr");
906 procedure Strncpy (Astring_Addr, Cstring : Address; N : Integer);
907 pragma Import (C, Strncpy, "strncpy");
909 Suffix_Ptr : Address;
910 Suffix_Length : Integer;
911 Result : String_Access;
914 Get_Suffix_Ptr (Suffix_Length'Address, Suffix_Ptr'Address);
916 Result := new String (1 .. Suffix_Length);
918 if Suffix_Length > 0 then
919 Strncpy (Result.all'Address, Suffix_Ptr, Suffix_Length);
923 end Get_Object_Suffix;
929 function Getenv (Name : String) return String_Access is
930 procedure Get_Env_Value_Ptr (Name, Length, Ptr : Address);
931 pragma Import (C, Get_Env_Value_Ptr, "__gnat_get_env_value_ptr");
933 procedure Strncpy (Astring_Addr, Cstring : Address; N : Integer);
934 pragma Import (C, Strncpy, "strncpy");
936 Env_Value_Ptr : aliased Address;
937 Env_Value_Length : aliased Integer;
938 F_Name : aliased String (1 .. Name'Length + 1);
939 Result : String_Access;
942 F_Name (1 .. Name'Length) := Name;
943 F_Name (F_Name'Last) := ASCII.NUL;
946 (F_Name'Address, Env_Value_Length'Address, Env_Value_Ptr'Address);
948 Result := new String (1 .. Env_Value_Length);
950 if Env_Value_Length > 0 then
951 Strncpy (Result.all'Address, Env_Value_Ptr, Env_Value_Length);
961 function GM_Day (Date : OS_Time) return Day_Type is
970 GM_Split (Date, Y, Mo, D, H, Mn, S);
978 function GM_Hour (Date : OS_Time) return Hour_Type is
987 GM_Split (Date, Y, Mo, D, H, Mn, S);
995 function GM_Minute (Date : OS_Time) return Minute_Type is
1004 GM_Split (Date, Y, Mo, D, H, Mn, S);
1012 function GM_Month (Date : OS_Time) return Month_Type is
1021 GM_Split (Date, Y, Mo, D, H, Mn, S);
1029 function GM_Second (Date : OS_Time) return Second_Type is
1038 GM_Split (Date, Y, Mo, D, H, Mn, S);
1048 Year : out Year_Type;
1049 Month : out Month_Type;
1051 Hour : out Hour_Type;
1052 Minute : out Minute_Type;
1053 Second : out Second_Type)
1055 procedure To_GM_Time
1056 (P_Time_T, P_Year, P_Month, P_Day, P_Hours, P_Mins, P_Secs : Address);
1057 pragma Import (C, To_GM_Time, "__gnat_to_gm_time");
1059 T : OS_Time := Date;
1068 -- Use the global lock because To_GM_Time is not thread safe.
1070 Locked_Processing : begin
1073 (T'Address, Y'Address, Mo'Address, D'Address,
1074 H'Address, Mn'Address, S'Address);
1075 SSL.Unlock_Task.all;
1079 SSL.Unlock_Task.all;
1081 end Locked_Processing;
1095 function GM_Year (Date : OS_Time) return Year_Type is
1104 GM_Split (Date, Y, Mo, D, H, Mn, S);
1108 ----------------------
1109 -- Is_Absolute_Path --
1110 ----------------------
1112 function Is_Absolute_Path (Name : String) return Boolean is
1113 function Is_Absolute_Path
1115 Length : Integer) return Integer;
1116 pragma Import (C, Is_Absolute_Path, "__gnat_is_absolute_path");
1119 return Is_Absolute_Path (Name'Address, Name'Length) /= 0;
1120 end Is_Absolute_Path;
1126 function Is_Directory (Name : C_File_Name) return Boolean is
1127 function Is_Directory (Name : Address) return Integer;
1128 pragma Import (C, Is_Directory, "__gnat_is_directory");
1131 return Is_Directory (Name) /= 0;
1134 function Is_Directory (Name : String) return Boolean is
1135 F_Name : String (1 .. Name'Length + 1);
1138 F_Name (1 .. Name'Length) := Name;
1139 F_Name (F_Name'Last) := ASCII.NUL;
1140 return Is_Directory (F_Name'Address);
1143 ---------------------
1144 -- Is_Regular_File --
1145 ---------------------
1147 function Is_Regular_File (Name : C_File_Name) return Boolean is
1148 function Is_Regular_File (Name : Address) return Integer;
1149 pragma Import (C, Is_Regular_File, "__gnat_is_regular_file");
1152 return Is_Regular_File (Name) /= 0;
1153 end Is_Regular_File;
1155 function Is_Regular_File (Name : String) return Boolean is
1156 F_Name : String (1 .. Name'Length + 1);
1159 F_Name (1 .. Name'Length) := Name;
1160 F_Name (F_Name'Last) := ASCII.NUL;
1161 return Is_Regular_File (F_Name'Address);
1162 end Is_Regular_File;
1164 ----------------------
1165 -- Is_Readable_File --
1166 ----------------------
1168 function Is_Readable_File (Name : C_File_Name) return Boolean is
1169 function Is_Readable_File (Name : Address) return Integer;
1170 pragma Import (C, Is_Readable_File, "__gnat_is_readable_file");
1173 return Is_Readable_File (Name) /= 0;
1174 end Is_Readable_File;
1176 function Is_Readable_File (Name : String) return Boolean is
1177 F_Name : String (1 .. Name'Length + 1);
1180 F_Name (1 .. Name'Length) := Name;
1181 F_Name (F_Name'Last) := ASCII.NUL;
1182 return Is_Readable_File (F_Name'Address);
1183 end Is_Readable_File;
1185 ----------------------
1186 -- Is_Writable_File --
1187 ----------------------
1189 function Is_Writable_File (Name : C_File_Name) return Boolean is
1190 function Is_Writable_File (Name : Address) return Integer;
1191 pragma Import (C, Is_Writable_File, "__gnat_is_writable_file");
1194 return Is_Writable_File (Name) /= 0;
1195 end Is_Writable_File;
1197 function Is_Writable_File (Name : String) return Boolean is
1198 F_Name : String (1 .. Name'Length + 1);
1201 F_Name (1 .. Name'Length) := Name;
1202 F_Name (F_Name'Last) := ASCII.NUL;
1203 return Is_Writable_File (F_Name'Address);
1204 end Is_Writable_File;
1206 ----------------------
1207 -- Is_Symbolic_Link --
1208 ----------------------
1210 function Is_Symbolic_Link (Name : C_File_Name) return Boolean is
1211 function Is_Symbolic_Link (Name : Address) return Integer;
1212 pragma Import (C, Is_Symbolic_Link, "__gnat_is_symbolic_link");
1215 return Is_Symbolic_Link (Name) /= 0;
1216 end Is_Symbolic_Link;
1218 function Is_Symbolic_Link (Name : String) return Boolean is
1219 F_Name : String (1 .. Name'Length + 1);
1222 F_Name (1 .. Name'Length) := Name;
1223 F_Name (F_Name'Last) := ASCII.NUL;
1224 return Is_Symbolic_Link (F_Name'Address);
1225 end Is_Symbolic_Link;
1227 -------------------------
1228 -- Locate_Exec_On_Path --
1229 -------------------------
1231 function Locate_Exec_On_Path
1232 (Exec_Name : String) return String_Access
1234 function Locate_Exec_On_Path (C_Exec_Name : Address) return Address;
1235 pragma Import (C, Locate_Exec_On_Path, "__gnat_locate_exec_on_path");
1237 procedure Free (Ptr : System.Address);
1238 pragma Import (C, Free, "free");
1240 C_Exec_Name : String (1 .. Exec_Name'Length + 1);
1241 Path_Addr : Address;
1243 Result : String_Access;
1246 C_Exec_Name (1 .. Exec_Name'Length) := Exec_Name;
1247 C_Exec_Name (C_Exec_Name'Last) := ASCII.NUL;
1249 Path_Addr := Locate_Exec_On_Path (C_Exec_Name'Address);
1250 Path_Len := C_String_Length (Path_Addr);
1252 if Path_Len = 0 then
1256 Result := To_Path_String_Access (Path_Addr, Path_Len);
1260 end Locate_Exec_On_Path;
1262 -------------------------
1263 -- Locate_Regular_File --
1264 -------------------------
1266 function Locate_Regular_File
1267 (File_Name : C_File_Name;
1268 Path : C_File_Name) return String_Access
1270 function Locate_Regular_File
1271 (C_File_Name, Path_Val : Address) return Address;
1272 pragma Import (C, Locate_Regular_File, "__gnat_locate_regular_file");
1274 procedure Free (Ptr : System.Address);
1275 pragma Import (C, Free, "free");
1277 Path_Addr : Address;
1279 Result : String_Access;
1282 Path_Addr := Locate_Regular_File (File_Name, Path);
1283 Path_Len := C_String_Length (Path_Addr);
1285 if Path_Len = 0 then
1288 Result := To_Path_String_Access (Path_Addr, Path_Len);
1292 end Locate_Regular_File;
1294 function Locate_Regular_File
1295 (File_Name : String;
1296 Path : String) return String_Access
1298 C_File_Name : String (1 .. File_Name'Length + 1);
1299 C_Path : String (1 .. Path'Length + 1);
1302 C_File_Name (1 .. File_Name'Length) := File_Name;
1303 C_File_Name (C_File_Name'Last) := ASCII.NUL;
1305 C_Path (1 .. Path'Length) := Path;
1306 C_Path (C_Path'Last) := ASCII.NUL;
1308 return Locate_Regular_File (C_File_Name'Address, C_Path'Address);
1309 end Locate_Regular_File;
1311 ------------------------
1312 -- Non_Blocking_Spawn --
1313 ------------------------
1315 function Non_Blocking_Spawn
1316 (Program_Name : String;
1317 Args : Argument_List) return Process_Id
1323 Spawn_Internal (Program_Name, Args, Junk, Pid, Blocking => False);
1325 end Non_Blocking_Spawn;
1327 -------------------------
1328 -- Normalize_Arguments --
1329 -------------------------
1331 procedure Normalize_Arguments (Args : in out Argument_List) is
1333 procedure Quote_Argument (Arg : in out String_Access);
1334 -- Add quote around argument if it contains spaces
1336 C_Argument_Needs_Quote : Integer;
1337 pragma Import (C, C_Argument_Needs_Quote, "__gnat_argument_needs_quote");
1338 Argument_Needs_Quote : constant Boolean := C_Argument_Needs_Quote /= 0;
1340 --------------------
1341 -- Quote_Argument --
1342 --------------------
1344 procedure Quote_Argument (Arg : in out String_Access) is
1345 Res : String (1 .. Arg'Length * 2);
1347 Quote_Needed : Boolean := False;
1350 if Arg (Arg'First) /= '"' or else Arg (Arg'Last) /= '"' then
1356 for K in Arg'Range loop
1360 if Arg (K) = '"' then
1364 Quote_Needed := True;
1366 elsif Arg (K) = ' ' then
1368 Quote_Needed := True;
1376 if Quote_Needed then
1378 -- If null terminated string, put the quote before
1380 if Res (J) = ASCII.Nul then
1383 Res (J) := ASCII.Nul;
1385 -- If argument is terminated by '\', then double it. Otherwise
1386 -- the ending quote will be taken as-is. This is quite strange
1387 -- spawn behavior from Windows, but this is what we see!
1390 if Res (J) = '\' then
1402 Old : String_Access := Arg;
1405 Arg := new String'(Res (1 .. J));
1414 if Argument_Needs_Quote then
1415 for K in Args'Range loop
1416 if Args (K) /= null and then Args (K)'Length /= 0 then
1417 Quote_Argument (Args (K));
1421 end Normalize_Arguments;
1423 ------------------------
1424 -- Normalize_Pathname --
1425 ------------------------
1427 function Normalize_Pathname
1429 Directory : String := "";
1430 Resolve_Links : Boolean := True;
1431 Case_Sensitive : Boolean := True) return String
1434 pragma Import (C, Max_Path, "__gnat_max_path_len");
1435 -- Maximum length of a path name
1437 procedure Get_Current_Dir
1438 (Dir : System.Address;
1439 Length : System.Address);
1440 pragma Import (C, Get_Current_Dir, "__gnat_get_current_dir");
1442 function Change_Dir (Dir_Name : String) return Integer;
1443 pragma Import (C, Change_Dir, "chdir");
1445 Path_Buffer : String (1 .. Max_Path + Max_Path + 2);
1446 End_Path : Natural := 0;
1447 Link_Buffer : String (1 .. Max_Path + 2);
1453 Max_Iterations : constant := 500;
1455 function Get_File_Names_Case_Sensitive return Integer;
1457 (C, Get_File_Names_Case_Sensitive,
1458 "__gnat_get_file_names_case_sensitive");
1460 Fold_To_Lower_Case : constant Boolean :=
1462 and then Get_File_Names_Case_Sensitive = 0;
1465 (Path : System.Address;
1466 Buf : System.Address;
1467 Bufsiz : Integer) return Integer;
1468 pragma Import (C, Readlink, "__gnat_readlink");
1470 function To_Canonical_File_Spec
1471 (Host_File : System.Address) return System.Address;
1473 (C, To_Canonical_File_Spec, "__gnat_to_canonical_file_spec");
1475 The_Name : String (1 .. Name'Length + 1);
1476 Canonical_File_Addr : System.Address;
1477 Canonical_File_Len : Integer;
1479 Need_To_Check_Drive_Letter : Boolean := False;
1480 -- Set to true if Name is an absolute path that starts with "//"
1482 function Strlen (S : System.Address) return Integer;
1483 pragma Import (C, Strlen, "strlen");
1485 function Get_Directory (Dir : String) return String;
1486 -- If Dir is not empty, return it, adding a directory separator
1487 -- if not already present, otherwise return current working directory
1488 -- with terminating directory separator.
1490 function Final_Value (S : String) return String;
1491 -- Make final adjustment to the returned string.
1492 -- To compensate for non standard path name in Interix,
1493 -- if S is "/x" or starts with "/x", where x is a capital
1494 -- letter 'A' to 'Z', add an additional '/' at the beginning
1495 -- so that the returned value starts with "//x".
1501 function Get_Directory (Dir : String) return String is
1503 -- Directory given, add directory separator if needed
1505 if Dir'Length > 0 then
1506 if Dir (Dir'Length) = Directory_Separator then
1510 Result : String (1 .. Dir'Length + 1);
1513 Result (1 .. Dir'Length) := Dir;
1514 Result (Result'Length) := Directory_Separator;
1519 -- Directory name not given, get current directory
1523 Buffer : String (1 .. Max_Path + 2);
1524 Path_Len : Natural := Max_Path;
1527 Get_Current_Dir (Buffer'Address, Path_Len'Address);
1529 if Buffer (Path_Len) /= Directory_Separator then
1530 Path_Len := Path_Len + 1;
1531 Buffer (Path_Len) := Directory_Separator;
1534 return Buffer (1 .. Path_Len);
1539 Reference_Dir : constant String := Get_Directory (Directory);
1540 -- Current directory name specified
1546 function Final_Value (S : String) return String is
1548 -- We may need to fold S to lower case, so we need a variable
1551 -- Interix has the non standard notion of disk drive
1552 -- indicated by two '/' followed by a capital letter
1553 -- 'A' .. 'Z'. One of the two '/' may have been removed
1554 -- by Normalize_Pathname. It has to be added again.
1555 -- For other OSes, this should not make no difference.
1557 if Need_To_Check_Drive_Letter
1558 and then S'Length >= 2
1559 and then S (S'First) = '/'
1560 and then S (S'First + 1) in 'A' .. 'Z'
1561 and then (S'Length = 2 or else S (S'First + 2) = '/')
1564 Result : String (1 .. S'Length + 1);
1568 Result (2 .. Result'Last) := S;
1570 if Fold_To_Lower_Case then
1571 System.Case_Util.To_Lower (Result);
1580 if Fold_To_Lower_Case then
1581 System.Case_Util.To_Lower (S1);
1590 -- Start of processing for Normalize_Pathname
1593 -- Special case, if name is null, then return null
1595 if Name'Length = 0 then
1599 -- First, convert VMS file spec to Unix file spec.
1600 -- If Name is not in VMS syntax, then this is equivalent
1601 -- to put Name at the begining of Path_Buffer.
1603 VMS_Conversion : begin
1604 The_Name (1 .. Name'Length) := Name;
1605 The_Name (The_Name'Last) := ASCII.NUL;
1607 Canonical_File_Addr := To_Canonical_File_Spec (The_Name'Address);
1608 Canonical_File_Len := Strlen (Canonical_File_Addr);
1610 -- If VMS syntax conversion has failed, return an empty string
1611 -- to indicate the failure.
1613 if Canonical_File_Len = 0 then
1618 subtype Path_String is String (1 .. Canonical_File_Len);
1619 type Path_String_Access is access Path_String;
1621 function Address_To_Access is new
1622 Unchecked_Conversion (Source => Address,
1623 Target => Path_String_Access);
1625 Path_Access : constant Path_String_Access :=
1626 Address_To_Access (Canonical_File_Addr);
1629 Path_Buffer (1 .. Canonical_File_Len) := Path_Access.all;
1630 End_Path := Canonical_File_Len;
1635 -- Replace all '/' by Directory Separators (this is for Windows)
1637 if Directory_Separator /= '/' then
1638 for Index in 1 .. End_Path loop
1639 if Path_Buffer (Index) = '/' then
1640 Path_Buffer (Index) := Directory_Separator;
1645 -- Resolving logical names from VMS.
1646 -- If we have a Unix path on VMS such as /temp/..., and TEMP is a
1647 -- logical name, we need to resolve this logical name.
1648 -- As we have no means to know if we are on VMS, we need to do that
1649 -- for absolute paths starting with '/'.
1650 -- We find the directory, change to it, get the current directory,
1651 -- and change the directory to this value.
1653 if Path_Buffer (1) = '/' then
1655 Cur_Dir : String := Get_Directory ("");
1656 -- Save the current directory, so that we can change dir back to
1657 -- it. It is not a constant, because the last character (a
1658 -- directory separator) is changed to ASCII.NUL to call the C
1661 Path : String := Path_Buffer (1 .. End_Path + 1);
1662 -- Copy of the current path. One character is added that may be
1663 -- set to ASCII.NUL to call chdir.
1665 Pos : Positive := End_Path;
1666 -- Position of the last directory separator ('/')
1669 -- Value returned by chdir
1672 -- Look for the last '/'
1674 while Path (Pos) /= '/' loop
1678 -- Get the previous character that is not a '/'
1680 while Pos > 1 and then Path (Pos) = '/' loop
1684 -- If we are at the start of the path, take the full path.
1685 -- It may be a file in the root directory, but it may also be
1686 -- a subdirectory of the root directory.
1692 -- Add the ASCII.NUL to be able to call the C function chdir
1693 Path (Pos + 1) := ASCII.NUL;
1695 Status := Change_Dir (Path (1 .. Pos + 1));
1697 -- If Status is not zero, then we do nothing: this is a file
1698 -- path or it is not a valid directory path.
1702 New_Dir : constant String := Get_Directory ("");
1703 -- The directory path
1705 New_Path : String (1 .. New_Dir'Length + End_Path - Pos);
1706 -- The new complete path, that is built below
1709 New_Path (1 .. New_Dir'Length) := New_Dir;
1710 New_Path (New_Dir'Length + 1 .. New_Path'Last) :=
1711 Path_Buffer (Pos + 1 .. End_Path);
1712 End_Path := New_Path'Length;
1713 Path_Buffer (1 .. End_Path) := New_Path;
1716 -- Back to where we were before
1718 Cur_Dir (Cur_Dir'Last) := ASCII.NUL;
1719 Status := Change_Dir (Cur_Dir);
1724 -- Start the conversions
1726 -- If this is not finished after Max_Iterations, give up and
1727 -- return an empty string.
1729 for J in 1 .. Max_Iterations loop
1731 -- If we don't have an absolute pathname, prepend
1732 -- the directory Reference_Dir.
1735 and then not Is_Absolute_Path (Path_Buffer (1 .. End_Path))
1738 (Reference_Dir'Last + 1 .. Reference_Dir'Length + End_Path) :=
1739 Path_Buffer (1 .. End_Path);
1740 End_Path := Reference_Dir'Length + End_Path;
1741 Path_Buffer (1 .. Reference_Dir'Length) := Reference_Dir;
1742 Last := Reference_Dir'Length;
1745 -- If name starts with "//", we may have a drive letter on Interix
1747 if Last = 1 and then End_Path >= 3 then
1748 Need_To_Check_Drive_Letter := (Path_Buffer (1 .. 2)) = "//";
1754 -- Ensure that Windows network drives are kept, e.g: \\server\drive-c
1757 and then Directory_Separator = '\'
1758 and then Path_Buffer (1 .. 2) = "\\"
1763 -- If we have traversed the full pathname, return it
1765 if Start > End_Path then
1766 return Final_Value (Path_Buffer (1 .. End_Path));
1769 -- Remove duplicate directory separators
1771 while Path_Buffer (Start) = Directory_Separator loop
1772 if Start = End_Path then
1773 return Final_Value (Path_Buffer (1 .. End_Path - 1));
1776 Path_Buffer (Start .. End_Path - 1) :=
1777 Path_Buffer (Start + 1 .. End_Path);
1778 End_Path := End_Path - 1;
1782 -- Find the end of the current field: last character
1783 -- or the one preceding the next directory separator.
1785 while Finish < End_Path
1786 and then Path_Buffer (Finish + 1) /= Directory_Separator
1788 Finish := Finish + 1;
1793 if Start = Finish and then Path_Buffer (Start) = '.' then
1794 if Start = End_Path then
1796 return (1 => Directory_Separator);
1799 if Fold_To_Lower_Case then
1800 System.Case_Util.To_Lower (Path_Buffer (1 .. Last - 1));
1803 return Path_Buffer (1 .. Last - 1);
1808 Path_Buffer (Last + 1 .. End_Path - 2) :=
1809 Path_Buffer (Last + 3 .. End_Path);
1810 End_Path := End_Path - 2;
1813 -- Remove ".." fields
1815 elsif Finish = Start + 1
1816 and then Path_Buffer (Start .. Finish) = ".."
1821 exit when Start < 1 or else
1822 Path_Buffer (Start) = Directory_Separator;
1826 if Finish = End_Path then
1827 return (1 => Directory_Separator);
1830 Path_Buffer (1 .. End_Path - Finish) :=
1831 Path_Buffer (Finish + 1 .. End_Path);
1832 End_Path := End_Path - Finish;
1837 if Finish = End_Path then
1838 return Final_Value (Path_Buffer (1 .. Start - 1));
1841 Path_Buffer (Start + 1 .. Start + End_Path - Finish - 1) :=
1842 Path_Buffer (Finish + 2 .. End_Path);
1843 End_Path := Start + End_Path - Finish - 1;
1848 -- Check if current field is a symbolic link
1850 elsif Resolve_Links then
1852 Saved : constant Character := Path_Buffer (Finish + 1);
1855 Path_Buffer (Finish + 1) := ASCII.NUL;
1856 Status := Readlink (Path_Buffer'Address,
1857 Link_Buffer'Address,
1858 Link_Buffer'Length);
1859 Path_Buffer (Finish + 1) := Saved;
1862 -- Not a symbolic link, move to the next field, if any
1867 -- Replace symbolic link with its value.
1870 if Is_Absolute_Path (Link_Buffer (1 .. Status)) then
1871 Path_Buffer (Status + 1 .. End_Path - (Finish - Status)) :=
1872 Path_Buffer (Finish + 1 .. End_Path);
1873 End_Path := End_Path - (Finish - Status);
1874 Path_Buffer (1 .. Status) := Link_Buffer (1 .. Status);
1879 (Last + Status + 1 .. End_Path - Finish + Last + Status) :=
1880 Path_Buffer (Finish + 1 .. End_Path);
1881 End_Path := End_Path - Finish + Last + Status;
1882 Path_Buffer (Last + 1 .. Last + Status) :=
1883 Link_Buffer (1 .. Status);
1892 -- Too many iterations: give up
1894 -- This can happen when there is a circularity in the symbolic links:
1895 -- A is a symbolic link for B, which itself is a symbolic link, and
1896 -- the target of B or of another symbolic link target of B is A.
1897 -- In this case, we return an empty string to indicate failure to
1901 end Normalize_Pathname;
1908 (Name : C_File_Name;
1909 Fmode : Mode) return File_Descriptor
1911 function C_Open_Read
1912 (Name : C_File_Name;
1913 Fmode : Mode) return File_Descriptor;
1914 pragma Import (C, C_Open_Read, "__gnat_open_read");
1917 return C_Open_Read (Name, Fmode);
1922 Fmode : Mode) return File_Descriptor
1924 C_Name : String (1 .. Name'Length + 1);
1927 C_Name (1 .. Name'Length) := Name;
1928 C_Name (C_Name'Last) := ASCII.NUL;
1929 return Open_Read (C_Name (C_Name'First)'Address, Fmode);
1932 ---------------------
1933 -- Open_Read_Write --
1934 ---------------------
1936 function Open_Read_Write
1937 (Name : C_File_Name;
1938 Fmode : Mode) return File_Descriptor
1940 function C_Open_Read_Write
1941 (Name : C_File_Name;
1942 Fmode : Mode) return File_Descriptor;
1943 pragma Import (C, C_Open_Read_Write, "__gnat_open_rw");
1946 return C_Open_Read_Write (Name, Fmode);
1947 end Open_Read_Write;
1949 function Open_Read_Write
1951 Fmode : Mode) return File_Descriptor
1953 C_Name : String (1 .. Name'Length + 1);
1956 C_Name (1 .. Name'Length) := Name;
1957 C_Name (C_Name'Last) := ASCII.NUL;
1958 return Open_Read_Write (C_Name (C_Name'First)'Address, Fmode);
1959 end Open_Read_Write;
1966 (FD : File_Descriptor;
1968 N : Integer) return Integer
1971 return Integer (System.CRTL.read
1972 (System.CRTL.int (FD), System.CRTL.chars (A), System.CRTL.int (N)));
1979 procedure Rename_File
1980 (Old_Name : C_File_Name;
1981 New_Name : C_File_Name;
1982 Success : out Boolean)
1984 function rename (From, To : Address) return Integer;
1985 pragma Import (C, rename, "rename");
1990 R := rename (Old_Name, New_Name);
1994 procedure Rename_File
1997 Success : out Boolean)
1999 C_Old_Name : String (1 .. Old_Name'Length + 1);
2000 C_New_Name : String (1 .. New_Name'Length + 1);
2003 C_Old_Name (1 .. Old_Name'Length) := Old_Name;
2004 C_Old_Name (C_Old_Name'Last) := ASCII.NUL;
2006 C_New_Name (1 .. New_Name'Length) := New_Name;
2007 C_New_Name (C_New_Name'Last) := ASCII.NUL;
2009 Rename_File (C_Old_Name'Address, C_New_Name'Address, Success);
2016 procedure Setenv (Name : String; Value : String) is
2017 F_Name : String (1 .. Name'Length + 1);
2018 F_Value : String (1 .. Value'Length + 1);
2020 procedure Set_Env_Value (Name, Value : System.Address);
2021 pragma Import (C, Set_Env_Value, "__gnat_set_env_value");
2024 F_Name (1 .. Name'Length) := Name;
2025 F_Name (F_Name'Last) := ASCII.NUL;
2027 F_Value (1 .. Value'Length) := Value;
2028 F_Value (F_Value'Last) := ASCII.NUL;
2030 Set_Env_Value (F_Name'Address, F_Value'Address);
2038 (Program_Name : String;
2039 Args : Argument_List) return Integer
2045 Spawn_Internal (Program_Name, Args, Result, Junk, Blocking => True);
2050 (Program_Name : String;
2051 Args : Argument_List;
2052 Success : out Boolean)
2055 Success := (Spawn (Program_Name, Args) = 0);
2058 --------------------
2059 -- Spawn_Internal --
2060 --------------------
2062 procedure Spawn_Internal
2063 (Program_Name : String;
2064 Args : Argument_List;
2065 Result : out Integer;
2066 Pid : out Process_Id;
2070 procedure Spawn (Args : Argument_List);
2073 N_Args : Argument_List (Args'Range);
2074 -- Normalized arguments
2080 procedure Spawn (Args : Argument_List) is
2081 type Chars is array (Positive range <>) of aliased Character;
2082 type Char_Ptr is access constant Character;
2084 Command_Len : constant Positive := Program_Name'Length + 1
2085 + Args_Length (Args);
2086 Command_Last : Natural := 0;
2087 Command : aliased Chars (1 .. Command_Len);
2088 -- Command contains all characters of the Program_Name and Args,
2089 -- all terminated by ASCII.NUL characters
2091 Arg_List_Len : constant Positive := Args'Length + 2;
2092 Arg_List_Last : Natural := 0;
2093 Arg_List : aliased array (1 .. Arg_List_Len) of Char_Ptr;
2094 -- List with pointers to NUL-terminated strings of the
2095 -- Program_Name and the Args and terminated with a null pointer.
2096 -- We rely on the default initialization for the last null pointer.
2098 procedure Add_To_Command (S : String);
2099 -- Add S and a NUL character to Command, updating Last
2101 function Portable_Spawn (Args : Address) return Integer;
2102 pragma Import (C, Portable_Spawn, "__gnat_portable_spawn");
2104 function Portable_No_Block_Spawn (Args : Address) return Process_Id;
2106 (C, Portable_No_Block_Spawn, "__gnat_portable_no_block_spawn");
2108 --------------------
2109 -- Add_To_Command --
2110 --------------------
2112 procedure Add_To_Command (S : String) is
2113 First : constant Natural := Command_Last + 1;
2116 Command_Last := Command_Last + S'Length;
2118 -- Move characters one at a time, because Command has
2119 -- aliased components.
2121 for J in S'Range loop
2122 Command (First + J - S'First) := S (J);
2125 Command_Last := Command_Last + 1;
2126 Command (Command_Last) := ASCII.NUL;
2128 Arg_List_Last := Arg_List_Last + 1;
2129 Arg_List (Arg_List_Last) := Command (First)'Access;
2132 -- Start of processing for Spawn
2135 Add_To_Command (Program_Name);
2137 for J in Args'Range loop
2138 Add_To_Command (Args (J).all);
2143 Result := Portable_Spawn (Arg_List'Address);
2145 Pid := Portable_No_Block_Spawn (Arg_List'Address);
2146 Result := Boolean'Pos (Pid /= Invalid_Pid);
2150 -- Start of processing for Spawn_Internal
2153 -- Copy arguments into a local structure
2155 for K in N_Args'Range loop
2156 N_Args (K) := new String'(Args (K).all);
2159 -- Normalize those arguments
2161 Normalize_Arguments (N_Args);
2163 -- Call spawn using the normalized arguments
2167 -- Free arguments list
2169 for K in N_Args'Range loop
2174 ---------------------------
2175 -- To_Path_String_Access --
2176 ---------------------------
2178 function To_Path_String_Access
2179 (Path_Addr : Address;
2180 Path_Len : Integer) return String_Access
2182 subtype Path_String is String (1 .. Path_Len);
2183 type Path_String_Access is access Path_String;
2185 function Address_To_Access is new
2186 Unchecked_Conversion (Source => Address,
2187 Target => Path_String_Access);
2189 Path_Access : constant Path_String_Access :=
2190 Address_To_Access (Path_Addr);
2192 Return_Val : String_Access;
2195 Return_Val := new String (1 .. Path_Len);
2197 for J in 1 .. Path_Len loop
2198 Return_Val (J) := Path_Access (J);
2202 end To_Path_String_Access;
2208 procedure Wait_Process (Pid : out Process_Id; Success : out Boolean) is
2211 function Portable_Wait (S : Address) return Process_Id;
2212 pragma Import (C, Portable_Wait, "__gnat_portable_wait");
2215 Pid := Portable_Wait (Status'Address);
2216 Success := (Status = 0);
2224 (FD : File_Descriptor;
2226 N : Integer) return Integer
2229 return Integer (System.CRTL.write
2230 (System.CRTL.int (FD), System.CRTL.chars (A), System.CRTL.int (N)));