1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
5 -- G N A T . O S _ L I B --
9 -- Copyright (C) 1995-2006, AdaCore --
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. --
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 Unchecked_Deallocation;
39 with System; use System;
41 package body GNAT.OS_Lib is
43 -- Imported procedures Dup and Dup2 are used in procedures Spawn and
44 -- Non_Blocking_Spawn.
46 function Dup (Fd : File_Descriptor) return File_Descriptor;
47 pragma Import (C, Dup, "__gnat_dup");
49 procedure Dup2 (Old_Fd, New_Fd : File_Descriptor);
50 pragma Import (C, Dup2, "__gnat_dup2");
53 -- Note: OpenVMS should be a constant, but it cannot be, because it
54 -- prevents bootstrapping on some platforms.
56 pragma Import (Ada, OpenVMS, "system__openvms");
57 -- Needed to avoid doing useless checks when non on a VMS platform (see
58 -- Normalize_Pathname).
60 On_Windows : constant Boolean := Directory_Separator = '\';
61 -- An indication that we are on Windows. Used in Normalize_Pathname, to
62 -- deal with drive letters in the beginning of absolute paths.
64 package SSL renames System.Soft_Links;
66 -- The following are used by Create_Temp_File
68 First_Temp_File_Name : constant String := "GNAT-TEMP-000000.TMP";
69 -- Used to initialize Current_Temp_File_Name and Temp_File_Name_Last_Digit
71 Current_Temp_File_Name : String := First_Temp_File_Name;
72 -- Name of the temp file last created
74 Temp_File_Name_Last_Digit : constant Positive :=
75 First_Temp_File_Name'Last - 4;
76 -- Position of the last digit in Current_Temp_File_Name
78 Max_Attempts : constant := 100;
79 -- The maximum number of attempts to create a new temp file
81 -----------------------
82 -- Local Subprograms --
83 -----------------------
85 function Args_Length (Args : Argument_List) return Natural;
86 -- Returns total number of characters needed to create a string
87 -- of all Args terminated by ASCII.NUL characters
89 function C_String_Length (S : Address) return Integer;
90 -- Returns the length of a C string. Does check for null address
93 procedure Spawn_Internal
94 (Program_Name : String;
99 -- Internal routine to implement the two Spawn (blocking/non blocking)
100 -- routines. If Blocking is set to True then the spawn is blocking
101 -- otherwise it is non blocking. In this latter case the Pid contains the
102 -- process id number. The first three parameters are as in Spawn. Note that
103 -- Spawn_Internal normalizes the argument list before calling the low level
104 -- system spawn routines (see Normalize_Arguments).
106 -- Note: Normalize_Arguments is designed to do nothing if it is called more
107 -- than once, so calling Normalize_Arguments before calling one of the
108 -- spawn routines is fine.
110 function To_Path_String_Access
111 (Path_Addr : Address;
112 Path_Len : Integer) return String_Access;
113 -- Converts a C String to an Ada String. We could do this making use of
114 -- Interfaces.C.Strings but we prefer not to import that entire package
120 function "<" (X, Y : OS_Time) return Boolean is
122 return Long_Integer (X) < Long_Integer (Y);
129 function "<=" (X, Y : OS_Time) return Boolean is
131 return Long_Integer (X) <= Long_Integer (Y);
138 function ">" (X, Y : OS_Time) return Boolean is
140 return Long_Integer (X) > Long_Integer (Y);
147 function ">=" (X, Y : OS_Time) return Boolean is
149 return Long_Integer (X) >= Long_Integer (Y);
156 function Args_Length (Args : Argument_List) return Natural is
160 for J in Args'Range loop
161 Len := Len + Args (J)'Length + 1; -- One extra for ASCII.NUL
167 -----------------------------
168 -- Argument_String_To_List --
169 -----------------------------
171 function Argument_String_To_List
172 (Arg_String : String) return Argument_List_Access
174 Max_Args : constant Integer := Arg_String'Length;
175 New_Argv : Argument_List (1 .. Max_Args);
176 New_Argc : Natural := 0;
180 Idx := Arg_String'First;
183 exit when Idx > Arg_String'Last;
186 Quoted : Boolean := False;
187 Backqd : Boolean := False;
194 -- An unquoted space is the end of an argument
196 if not (Backqd or Quoted)
197 and then Arg_String (Idx) = ' '
201 -- Start of a quoted string
203 elsif not (Backqd or Quoted)
204 and then Arg_String (Idx) = '"'
208 -- End of a quoted string and end of an argument
210 elsif (Quoted and not Backqd)
211 and then Arg_String (Idx) = '"'
216 -- Following character is backquoted
218 elsif Arg_String (Idx) = '\' then
221 -- Turn off backquoting after advancing one character
229 exit when Idx > Arg_String'Last;
234 New_Argc := New_Argc + 1;
235 New_Argv (New_Argc) :=
236 new String'(Arg_String (Old_Idx .. Idx - 1));
238 -- Skip extraneous spaces
240 while Idx <= Arg_String'Last and then Arg_String (Idx) = ' ' loop
246 return new Argument_List'(New_Argv (1 .. New_Argc));
247 end Argument_String_To_List;
249 ---------------------
250 -- C_String_Length --
251 ---------------------
253 function C_String_Length (S : Address) return Integer is
254 function Strlen (S : Address) return Integer;
255 pragma Import (C, Strlen, "strlen");
257 if S = Null_Address then
268 procedure Close (FD : File_Descriptor) is
269 procedure C_Close (FD : File_Descriptor);
270 pragma Import (C, C_Close, "close");
275 procedure Close (FD : File_Descriptor; Status : out Boolean) is
276 function C_Close (FD : File_Descriptor) return Integer;
277 pragma Import (C, C_Close, "close");
279 Status := (C_Close (FD) = 0);
289 Success : out Boolean;
290 Mode : Copy_Mode := Copy;
291 Preserve : Attribute := Time_Stamps)
293 From : File_Descriptor;
294 To : File_Descriptor;
296 Copy_Error : exception;
297 -- Internal exception raised to signal error in copy
299 function Build_Path (Dir : String; File : String) return String;
300 -- Returns pathname Dir catenated with File adding the directory
301 -- separator only if needed.
303 procedure Copy (From, To : File_Descriptor);
304 -- Read data from From and place them into To. In both cases the
305 -- operations uses the current file position. Raises Constraint_Error
306 -- if a problem occurs during the copy.
308 procedure Copy_To (To_Name : String);
309 -- Does a straight copy from source to designated destination file
315 function Build_Path (Dir : String; File : String) return String is
316 Res : String (1 .. Dir'Length + File'Length + 1);
318 Base_File_Ptr : Integer;
319 -- The base file name is File (Base_File_Ptr + 1 .. File'Last)
321 function Is_Dirsep (C : Character) return Boolean;
322 pragma Inline (Is_Dirsep);
323 -- Returns True if C is a directory separator. On Windows we
324 -- handle both styles of directory separator.
330 function Is_Dirsep (C : Character) return Boolean is
332 return C = Directory_Separator or else C = '/';
335 -- Start of processing for Build_Path
338 -- Find base file name
340 Base_File_Ptr := File'Last;
341 while Base_File_Ptr >= File'First loop
342 exit when Is_Dirsep (File (Base_File_Ptr));
343 Base_File_Ptr := Base_File_Ptr - 1;
347 Base_File : String renames
348 File (Base_File_Ptr + 1 .. File'Last);
351 Res (1 .. Dir'Length) := Dir;
353 if Is_Dirsep (Dir (Dir'Last)) then
354 Res (Dir'Length + 1 .. Dir'Length + Base_File'Length) :=
356 return Res (1 .. Dir'Length + Base_File'Length);
359 Res (Dir'Length + 1) := Directory_Separator;
360 Res (Dir'Length + 2 .. Dir'Length + 1 + Base_File'Length) :=
362 return Res (1 .. Dir'Length + 1 + Base_File'Length);
371 procedure Copy (From, To : File_Descriptor) is
372 Buf_Size : constant := 200_000;
373 type Buf is array (1 .. Buf_Size) of Character;
374 type Buf_Ptr is access Buf;
380 Status_From : Boolean;
382 -- Statuses for the calls to Close
384 procedure Free is new Unchecked_Deallocation (Buf, Buf_Ptr);
387 if From = Invalid_FD then
390 elsif To = Invalid_FD then
391 Close (From, Status_From);
395 -- Allocate the buffer on the heap
400 R := Read (From, Buffer (1)'Address, Buf_Size);
402 -- For VMS, the buffer may not be full. So, we need to try again
403 -- until there is nothing to read.
407 W := Write (To, Buffer (1)'Address, R);
411 -- Problem writing data, could be a disk full. Close files
412 -- without worrying about status, since we are raising a
413 -- Copy_Error exception in any case.
415 Close (From, Status_From);
416 Close (To, Status_To);
424 Close (From, Status_From);
425 Close (To, Status_To);
429 if not (Status_From and Status_To) then
438 procedure Copy_To (To_Name : String) is
440 function Copy_Attributes
441 (From, To : System.Address;
442 Mode : Integer) return Integer;
443 pragma Import (C, Copy_Attributes, "__gnat_copy_attribs");
444 -- Mode = 0 - copy only time stamps.
445 -- Mode = 1 - copy time stamps and read/write/execute attributes
447 C_From : String (1 .. Name'Length + 1);
448 C_To : String (1 .. To_Name'Length + 1);
451 From := Open_Read (Name, Binary);
452 To := Create_File (To_Name, Binary);
457 C_From (1 .. Name'Length) := Name;
458 C_From (C_From'Last) := ASCII.Nul;
460 C_To (1 .. To_Name'Length) := To_Name;
461 C_To (C_To'Last) := ASCII.Nul;
466 if Copy_Attributes (C_From'Address, C_To'Address, 0) = -1 then
471 if Copy_Attributes (C_From'Address, C_To'Address, 1) = -1 then
481 -- Start of processing for Copy_File
486 -- The source file must exist
488 if not Is_Regular_File (Name) then
492 -- The source file exists
496 -- Copy case, target file must not exist
500 -- If the target file exists, we have an error
502 if Is_Regular_File (Pathname) then
505 -- Case of target is a directory
507 elsif Is_Directory (Pathname) then
509 Dest : constant String := Build_Path (Pathname, Name);
512 -- If target file exists, we have an error, else do copy
514 if Is_Regular_File (Dest) then
521 -- Case of normal copy to file (destination does not exist)
527 -- Overwrite case (destination file may or may not exist)
530 if Is_Directory (Pathname) then
531 Copy_To (Build_Path (Pathname, Name));
536 -- Append case (destination file may or may not exist)
540 -- Appending to existing file
542 if Is_Regular_File (Pathname) then
544 -- Append mode and destination file exists, append data at the
547 From := Open_Read (Name, Binary);
548 To := Open_Read_Write (Pathname, Binary);
549 Lseek (To, 0, Seek_End);
553 -- Appending to directory, not allowed
555 elsif Is_Directory (Pathname) then
558 -- Appending when target file does not exist
565 -- All error cases are caught here
574 Pathname : C_File_Name;
575 Success : out Boolean;
576 Mode : Copy_Mode := Copy;
577 Preserve : Attribute := Time_Stamps)
579 Ada_Name : String_Access :=
580 To_Path_String_Access
581 (Name, C_String_Length (Name));
583 Ada_Pathname : String_Access :=
584 To_Path_String_Access
585 (Pathname, C_String_Length (Pathname));
588 Copy_File (Ada_Name.all, Ada_Pathname.all, Success, Mode, Preserve);
593 ----------------------
594 -- Copy_Time_Stamps --
595 ----------------------
597 procedure Copy_Time_Stamps (Source, Dest : String; Success : out Boolean) is
599 function Copy_Attributes
600 (From, To : System.Address;
601 Mode : Integer) return Integer;
602 pragma Import (C, Copy_Attributes, "__gnat_copy_attribs");
603 -- Mode = 0 - copy only time stamps.
604 -- Mode = 1 - copy time stamps and read/write/execute attributes
607 if Is_Regular_File (Source) and then Is_Writable_File (Dest) then
609 C_Source : String (1 .. Source'Length + 1);
610 C_Dest : String (1 .. Dest'Length + 1);
612 C_Source (1 .. Source'Length) := Source;
613 C_Source (C_Source'Last) := ASCII.NUL;
615 C_Dest (1 .. Dest'Length) := Dest;
616 C_Dest (C_Dest'Last) := ASCII.NUL;
618 if Copy_Attributes (C_Source'Address, C_Dest'Address, 0) = -1 then
628 end Copy_Time_Stamps;
630 procedure Copy_Time_Stamps
631 (Source, Dest : C_File_Name;
632 Success : out Boolean)
634 Ada_Source : String_Access :=
635 To_Path_String_Access
636 (Source, C_String_Length (Source));
638 Ada_Dest : String_Access :=
639 To_Path_String_Access
640 (Dest, C_String_Length (Dest));
642 Copy_Time_Stamps (Ada_Source.all, Ada_Dest.all, Success);
645 end Copy_Time_Stamps;
653 Fmode : Mode) return File_Descriptor
655 function C_Create_File
657 Fmode : Mode) return File_Descriptor;
658 pragma Import (C, C_Create_File, "__gnat_open_create");
661 return C_Create_File (Name, Fmode);
666 Fmode : Mode) return File_Descriptor
668 C_Name : String (1 .. Name'Length + 1);
671 C_Name (1 .. Name'Length) := Name;
672 C_Name (C_Name'Last) := ASCII.NUL;
673 return Create_File (C_Name (C_Name'First)'Address, Fmode);
676 ---------------------
677 -- Create_New_File --
678 ---------------------
680 function Create_New_File
682 Fmode : Mode) return File_Descriptor
684 function C_Create_New_File
686 Fmode : Mode) return File_Descriptor;
687 pragma Import (C, C_Create_New_File, "__gnat_open_new");
690 return C_Create_New_File (Name, Fmode);
693 function Create_New_File
695 Fmode : Mode) return File_Descriptor
697 C_Name : String (1 .. Name'Length + 1);
700 C_Name (1 .. Name'Length) := Name;
701 C_Name (C_Name'Last) := ASCII.NUL;
702 return Create_New_File (C_Name (C_Name'First)'Address, Fmode);
705 -----------------------------
706 -- Create_Output_Text_File --
707 -----------------------------
709 function Create_Output_Text_File (Name : String) return File_Descriptor is
710 function C_Create_File
711 (Name : C_File_Name) return File_Descriptor;
712 pragma Import (C, C_Create_File, "__gnat_create_output_file");
714 C_Name : String (1 .. Name'Length + 1);
717 C_Name (1 .. Name'Length) := Name;
718 C_Name (C_Name'Last) := ASCII.NUL;
719 return C_Create_File (C_Name (C_Name'First)'Address);
720 end Create_Output_Text_File;
722 ----------------------
723 -- Create_Temp_File --
724 ----------------------
726 procedure Create_Temp_File
727 (FD : out File_Descriptor;
728 Name : out Temp_File_Name)
730 function Open_New_Temp
731 (Name : System.Address;
732 Fmode : Mode) return File_Descriptor;
733 pragma Import (C, Open_New_Temp, "__gnat_open_new_temp");
736 FD := Open_New_Temp (Name'Address, Binary);
737 end Create_Temp_File;
739 procedure Create_Temp_File
740 (FD : out File_Descriptor;
741 Name : out String_Access)
744 Attempts : Natural := 0;
745 Current : String (Current_Temp_File_Name'Range);
748 -- Loop until a new temp file can be created
752 -- We need to protect global variable Current_Temp_File_Name
753 -- against concurrent access by different tasks.
757 -- Start at the last digit
759 Pos := Temp_File_Name_Last_Digit;
763 -- Increment the digit by one
765 case Current_Temp_File_Name (Pos) is
767 Current_Temp_File_Name (Pos) :=
768 Character'Succ (Current_Temp_File_Name (Pos));
773 -- For 9, set the digit to 0 and go to the previous digit
775 Current_Temp_File_Name (Pos) := '0';
780 -- If it is not a digit, then there are no available
781 -- temp file names. Return Invalid_FD. There is almost
782 -- no that this code will be ever be executed, since
783 -- it would mean that there are one million temp files
784 -- in the same directory!
793 Current := Current_Temp_File_Name;
795 -- We can now release the lock, because we are no longer
796 -- accessing Current_Temp_File_Name.
806 -- Attempt to create the file
808 FD := Create_New_File (Current, Binary);
810 if FD /= Invalid_FD then
811 Name := new String'(Current);
815 if not Is_Regular_File (Current) then
817 -- If the file does not already exist and we are unable to create
818 -- it, we give up after Max_Attempts. Otherwise, we try again with
819 -- the next available file name.
821 Attempts := Attempts + 1;
823 if Attempts >= Max_Attempts then
830 end Create_Temp_File;
836 procedure Delete_File (Name : Address; Success : out Boolean) is
839 function unlink (A : Address) return Integer;
840 pragma Import (C, unlink, "unlink");
847 procedure Delete_File (Name : String; Success : out Boolean) is
848 C_Name : String (1 .. Name'Length + 1);
851 C_Name (1 .. Name'Length) := Name;
852 C_Name (C_Name'Last) := ASCII.NUL;
854 Delete_File (C_Name'Address, Success);
857 ---------------------
858 -- File_Time_Stamp --
859 ---------------------
861 function File_Time_Stamp (FD : File_Descriptor) return OS_Time is
862 function File_Time (FD : File_Descriptor) return OS_Time;
863 pragma Import (C, File_Time, "__gnat_file_time_fd");
865 return File_Time (FD);
868 function File_Time_Stamp (Name : C_File_Name) return OS_Time is
869 function File_Time (Name : Address) return OS_Time;
870 pragma Import (C, File_Time, "__gnat_file_time_name");
872 return File_Time (Name);
875 function File_Time_Stamp (Name : String) return OS_Time is
876 F_Name : String (1 .. Name'Length + 1);
878 F_Name (1 .. Name'Length) := Name;
879 F_Name (F_Name'Last) := ASCII.NUL;
880 return File_Time_Stamp (F_Name'Address);
883 ---------------------------
884 -- Get_Debuggable_Suffix --
885 ---------------------------
887 function Get_Debuggable_Suffix return String_Access is
888 procedure Get_Suffix_Ptr (Length, Ptr : Address);
889 pragma Import (C, Get_Suffix_Ptr, "__gnat_get_debuggable_suffix_ptr");
891 procedure Strncpy (Astring_Addr, Cstring : Address; N : Integer);
892 pragma Import (C, Strncpy, "strncpy");
894 Suffix_Ptr : Address;
895 Suffix_Length : Integer;
896 Result : String_Access;
899 Get_Suffix_Ptr (Suffix_Length'Address, Suffix_Ptr'Address);
901 Result := new String (1 .. Suffix_Length);
903 if Suffix_Length > 0 then
904 Strncpy (Result.all'Address, Suffix_Ptr, Suffix_Length);
908 end Get_Debuggable_Suffix;
910 ----------------------------------
911 -- Get_Target_Debuggable_Suffix --
912 ----------------------------------
914 function Get_Target_Debuggable_Suffix return String_Access is
915 Target_Exec_Ext_Ptr : Address;
917 (C, Target_Exec_Ext_Ptr, "__gnat_target_debuggable_extension");
919 procedure Strncpy (Astring_Addr, Cstring : Address; N : Integer);
920 pragma Import (C, Strncpy, "strncpy");
922 function Strlen (Cstring : Address) return Integer;
923 pragma Import (C, Strlen, "strlen");
925 Suffix_Length : Integer;
926 Result : String_Access;
929 Suffix_Length := Strlen (Target_Exec_Ext_Ptr);
931 Result := new String (1 .. Suffix_Length);
933 if Suffix_Length > 0 then
934 Strncpy (Result.all'Address, Target_Exec_Ext_Ptr, Suffix_Length);
938 end Get_Target_Debuggable_Suffix;
940 ---------------------------
941 -- Get_Executable_Suffix --
942 ---------------------------
944 function Get_Executable_Suffix return String_Access is
945 procedure Get_Suffix_Ptr (Length, Ptr : Address);
946 pragma Import (C, Get_Suffix_Ptr, "__gnat_get_executable_suffix_ptr");
948 procedure Strncpy (Astring_Addr, Cstring : Address; N : Integer);
949 pragma Import (C, Strncpy, "strncpy");
951 Suffix_Ptr : Address;
952 Suffix_Length : Integer;
953 Result : String_Access;
956 Get_Suffix_Ptr (Suffix_Length'Address, Suffix_Ptr'Address);
958 Result := new String (1 .. Suffix_Length);
960 if Suffix_Length > 0 then
961 Strncpy (Result.all'Address, Suffix_Ptr, Suffix_Length);
965 end Get_Executable_Suffix;
967 ----------------------------------
968 -- Get_Target_Executable_Suffix --
969 ----------------------------------
971 function Get_Target_Executable_Suffix return String_Access is
972 Target_Exec_Ext_Ptr : Address;
974 (C, Target_Exec_Ext_Ptr, "__gnat_target_executable_extension");
976 procedure Strncpy (Astring_Addr, Cstring : Address; N : Integer);
977 pragma Import (C, Strncpy, "strncpy");
979 function Strlen (Cstring : Address) return Integer;
980 pragma Import (C, Strlen, "strlen");
982 Suffix_Length : Integer;
983 Result : String_Access;
986 Suffix_Length := Strlen (Target_Exec_Ext_Ptr);
988 Result := new String (1 .. Suffix_Length);
990 if Suffix_Length > 0 then
991 Strncpy (Result.all'Address, Target_Exec_Ext_Ptr, Suffix_Length);
995 end Get_Target_Executable_Suffix;
997 -----------------------
998 -- Get_Object_Suffix --
999 -----------------------
1001 function Get_Object_Suffix return String_Access is
1002 procedure Get_Suffix_Ptr (Length, Ptr : Address);
1003 pragma Import (C, Get_Suffix_Ptr, "__gnat_get_object_suffix_ptr");
1005 procedure Strncpy (Astring_Addr, Cstring : Address; N : Integer);
1006 pragma Import (C, Strncpy, "strncpy");
1008 Suffix_Ptr : Address;
1009 Suffix_Length : Integer;
1010 Result : String_Access;
1013 Get_Suffix_Ptr (Suffix_Length'Address, Suffix_Ptr'Address);
1015 Result := new String (1 .. Suffix_Length);
1017 if Suffix_Length > 0 then
1018 Strncpy (Result.all'Address, Suffix_Ptr, Suffix_Length);
1022 end Get_Object_Suffix;
1024 ------------------------------
1025 -- Get_Target_Object_Suffix --
1026 ------------------------------
1028 function Get_Target_Object_Suffix return String_Access is
1029 Target_Object_Ext_Ptr : Address;
1031 (C, Target_Object_Ext_Ptr, "__gnat_target_object_extension");
1033 procedure Strncpy (Astring_Addr, Cstring : Address; N : Integer);
1034 pragma Import (C, Strncpy, "strncpy");
1036 function Strlen (Cstring : Address) return Integer;
1037 pragma Import (C, Strlen, "strlen");
1039 Suffix_Length : Integer;
1040 Result : String_Access;
1043 Suffix_Length := Strlen (Target_Object_Ext_Ptr);
1045 Result := new String (1 .. Suffix_Length);
1047 if Suffix_Length > 0 then
1048 Strncpy (Result.all'Address, Target_Object_Ext_Ptr, Suffix_Length);
1052 end Get_Target_Object_Suffix;
1058 function Getenv (Name : String) return String_Access is
1059 procedure Get_Env_Value_Ptr (Name, Length, Ptr : Address);
1060 pragma Import (C, Get_Env_Value_Ptr, "__gnat_getenv");
1062 procedure Strncpy (Astring_Addr, Cstring : Address; N : Integer);
1063 pragma Import (C, Strncpy, "strncpy");
1065 Env_Value_Ptr : aliased Address;
1066 Env_Value_Length : aliased Integer;
1067 F_Name : aliased String (1 .. Name'Length + 1);
1068 Result : String_Access;
1071 F_Name (1 .. Name'Length) := Name;
1072 F_Name (F_Name'Last) := ASCII.NUL;
1075 (F_Name'Address, Env_Value_Length'Address, Env_Value_Ptr'Address);
1077 Result := new String (1 .. Env_Value_Length);
1079 if Env_Value_Length > 0 then
1080 Strncpy (Result.all'Address, Env_Value_Ptr, Env_Value_Length);
1090 function GM_Day (Date : OS_Time) return Day_Type is
1099 GM_Split (Date, Y, Mo, D, H, Mn, S);
1107 function GM_Hour (Date : OS_Time) return Hour_Type is
1116 GM_Split (Date, Y, Mo, D, H, Mn, S);
1124 function GM_Minute (Date : OS_Time) return Minute_Type is
1133 GM_Split (Date, Y, Mo, D, H, Mn, S);
1141 function GM_Month (Date : OS_Time) return Month_Type is
1150 GM_Split (Date, Y, Mo, D, H, Mn, S);
1158 function GM_Second (Date : OS_Time) return Second_Type is
1167 GM_Split (Date, Y, Mo, D, H, Mn, S);
1177 Year : out Year_Type;
1178 Month : out Month_Type;
1180 Hour : out Hour_Type;
1181 Minute : out Minute_Type;
1182 Second : out Second_Type)
1184 procedure To_GM_Time
1185 (P_Time_T, P_Year, P_Month, P_Day, P_Hours, P_Mins, P_Secs : Address);
1186 pragma Import (C, To_GM_Time, "__gnat_to_gm_time");
1188 T : OS_Time := Date;
1197 -- Use the global lock because To_GM_Time is not thread safe
1199 Locked_Processing : begin
1202 (T'Address, Y'Address, Mo'Address, D'Address,
1203 H'Address, Mn'Address, S'Address);
1204 SSL.Unlock_Task.all;
1208 SSL.Unlock_Task.all;
1210 end Locked_Processing;
1224 function GM_Year (Date : OS_Time) return Year_Type is
1233 GM_Split (Date, Y, Mo, D, H, Mn, S);
1237 ----------------------
1238 -- Is_Absolute_Path --
1239 ----------------------
1241 function Is_Absolute_Path (Name : String) return Boolean is
1242 function Is_Absolute_Path
1244 Length : Integer) return Integer;
1245 pragma Import (C, Is_Absolute_Path, "__gnat_is_absolute_path");
1247 return Is_Absolute_Path (Name'Address, Name'Length) /= 0;
1248 end Is_Absolute_Path;
1254 function Is_Directory (Name : C_File_Name) return Boolean is
1255 function Is_Directory (Name : Address) return Integer;
1256 pragma Import (C, Is_Directory, "__gnat_is_directory");
1258 return Is_Directory (Name) /= 0;
1261 function Is_Directory (Name : String) return Boolean is
1262 F_Name : String (1 .. Name'Length + 1);
1264 F_Name (1 .. Name'Length) := Name;
1265 F_Name (F_Name'Last) := ASCII.NUL;
1266 return Is_Directory (F_Name'Address);
1269 ---------------------
1270 -- Is_Regular_File --
1271 ---------------------
1273 function Is_Regular_File (Name : C_File_Name) return Boolean is
1274 function Is_Regular_File (Name : Address) return Integer;
1275 pragma Import (C, Is_Regular_File, "__gnat_is_regular_file");
1277 return Is_Regular_File (Name) /= 0;
1278 end Is_Regular_File;
1280 function Is_Regular_File (Name : String) return Boolean is
1281 F_Name : String (1 .. Name'Length + 1);
1283 F_Name (1 .. Name'Length) := Name;
1284 F_Name (F_Name'Last) := ASCII.NUL;
1285 return Is_Regular_File (F_Name'Address);
1286 end Is_Regular_File;
1288 ----------------------
1289 -- Is_Readable_File --
1290 ----------------------
1292 function Is_Readable_File (Name : C_File_Name) return Boolean is
1293 function Is_Readable_File (Name : Address) return Integer;
1294 pragma Import (C, Is_Readable_File, "__gnat_is_readable_file");
1296 return Is_Readable_File (Name) /= 0;
1297 end Is_Readable_File;
1299 function Is_Readable_File (Name : String) return Boolean is
1300 F_Name : String (1 .. Name'Length + 1);
1302 F_Name (1 .. Name'Length) := Name;
1303 F_Name (F_Name'Last) := ASCII.NUL;
1304 return Is_Readable_File (F_Name'Address);
1305 end Is_Readable_File;
1307 ----------------------
1308 -- Is_Writable_File --
1309 ----------------------
1311 function Is_Writable_File (Name : C_File_Name) return Boolean is
1312 function Is_Writable_File (Name : Address) return Integer;
1313 pragma Import (C, Is_Writable_File, "__gnat_is_writable_file");
1315 return Is_Writable_File (Name) /= 0;
1316 end Is_Writable_File;
1318 function Is_Writable_File (Name : String) return Boolean is
1319 F_Name : String (1 .. Name'Length + 1);
1321 F_Name (1 .. Name'Length) := Name;
1322 F_Name (F_Name'Last) := ASCII.NUL;
1323 return Is_Writable_File (F_Name'Address);
1324 end Is_Writable_File;
1326 ----------------------
1327 -- Is_Symbolic_Link --
1328 ----------------------
1330 function Is_Symbolic_Link (Name : C_File_Name) return Boolean is
1331 function Is_Symbolic_Link (Name : Address) return Integer;
1332 pragma Import (C, Is_Symbolic_Link, "__gnat_is_symbolic_link");
1334 return Is_Symbolic_Link (Name) /= 0;
1335 end Is_Symbolic_Link;
1337 function Is_Symbolic_Link (Name : String) return Boolean is
1338 F_Name : String (1 .. Name'Length + 1);
1340 F_Name (1 .. Name'Length) := Name;
1341 F_Name (F_Name'Last) := ASCII.NUL;
1342 return Is_Symbolic_Link (F_Name'Address);
1343 end Is_Symbolic_Link;
1345 -------------------------
1346 -- Locate_Exec_On_Path --
1347 -------------------------
1349 function Locate_Exec_On_Path
1350 (Exec_Name : String) return String_Access
1352 function Locate_Exec_On_Path (C_Exec_Name : Address) return Address;
1353 pragma Import (C, Locate_Exec_On_Path, "__gnat_locate_exec_on_path");
1355 procedure Free (Ptr : System.Address);
1356 pragma Import (C, Free, "free");
1358 C_Exec_Name : String (1 .. Exec_Name'Length + 1);
1359 Path_Addr : Address;
1361 Result : String_Access;
1364 C_Exec_Name (1 .. Exec_Name'Length) := Exec_Name;
1365 C_Exec_Name (C_Exec_Name'Last) := ASCII.NUL;
1367 Path_Addr := Locate_Exec_On_Path (C_Exec_Name'Address);
1368 Path_Len := C_String_Length (Path_Addr);
1370 if Path_Len = 0 then
1374 Result := To_Path_String_Access (Path_Addr, Path_Len);
1378 end Locate_Exec_On_Path;
1380 -------------------------
1381 -- Locate_Regular_File --
1382 -------------------------
1384 function Locate_Regular_File
1385 (File_Name : C_File_Name;
1386 Path : C_File_Name) return String_Access
1388 function Locate_Regular_File
1389 (C_File_Name, Path_Val : Address) return Address;
1390 pragma Import (C, Locate_Regular_File, "__gnat_locate_regular_file");
1392 procedure Free (Ptr : System.Address);
1393 pragma Import (C, Free, "free");
1395 Path_Addr : Address;
1397 Result : String_Access;
1400 Path_Addr := Locate_Regular_File (File_Name, Path);
1401 Path_Len := C_String_Length (Path_Addr);
1403 if Path_Len = 0 then
1406 Result := To_Path_String_Access (Path_Addr, Path_Len);
1410 end Locate_Regular_File;
1412 function Locate_Regular_File
1413 (File_Name : String;
1414 Path : String) return String_Access
1416 C_File_Name : String (1 .. File_Name'Length + 1);
1417 C_Path : String (1 .. Path'Length + 1);
1420 C_File_Name (1 .. File_Name'Length) := File_Name;
1421 C_File_Name (C_File_Name'Last) := ASCII.NUL;
1423 C_Path (1 .. Path'Length) := Path;
1424 C_Path (C_Path'Last) := ASCII.NUL;
1426 return Locate_Regular_File (C_File_Name'Address, C_Path'Address);
1427 end Locate_Regular_File;
1429 ------------------------
1430 -- Non_Blocking_Spawn --
1431 ------------------------
1433 function Non_Blocking_Spawn
1434 (Program_Name : String;
1435 Args : Argument_List) return Process_Id
1441 Spawn_Internal (Program_Name, Args, Junk, Pid, Blocking => False);
1443 end Non_Blocking_Spawn;
1445 function Non_Blocking_Spawn
1446 (Program_Name : String;
1447 Args : Argument_List;
1448 Output_File_Descriptor : File_Descriptor;
1449 Err_To_Out : Boolean := True)
1452 Saved_Output : File_Descriptor;
1453 Saved_Error : File_Descriptor := Invalid_FD; -- prevent warning
1456 if Output_File_Descriptor = Invalid_FD then
1460 -- Set standard output and, if specified, error to the temporary file
1462 Saved_Output := Dup (Standout);
1463 Dup2 (Output_File_Descriptor, Standout);
1466 Saved_Error := Dup (Standerr);
1467 Dup2 (Output_File_Descriptor, Standerr);
1470 -- Spawn the program
1472 Pid := Non_Blocking_Spawn (Program_Name, Args);
1474 -- Restore the standard output and error
1476 Dup2 (Saved_Output, Standout);
1479 Dup2 (Saved_Error, Standerr);
1482 -- And close the saved standard output and error file descriptors
1484 Close (Saved_Output);
1487 Close (Saved_Error);
1491 end Non_Blocking_Spawn;
1493 function Non_Blocking_Spawn
1494 (Program_Name : String;
1495 Args : Argument_List;
1496 Output_File : String;
1497 Err_To_Out : Boolean := True) return Process_Id
1499 Output_File_Descriptor : constant File_Descriptor :=
1500 Create_Output_Text_File (Output_File);
1501 Result : Process_Id;
1504 -- Do not attempt to spawn if the output file could not be created
1506 if Output_File_Descriptor = Invalid_FD then
1510 Result := Non_Blocking_Spawn
1511 (Program_Name, Args, Output_File_Descriptor, Err_To_Out);
1513 -- Close the file just created for the output, as the file descriptor
1514 -- cannot be used anywhere, being a local value. It is safe to do
1515 -- that, as the file descriptor has been duplicated to form
1516 -- standard output and error of the spawned process.
1518 Close (Output_File_Descriptor);
1522 end Non_Blocking_Spawn;
1524 -------------------------
1525 -- Normalize_Arguments --
1526 -------------------------
1528 procedure Normalize_Arguments (Args : in out Argument_List) is
1530 procedure Quote_Argument (Arg : in out String_Access);
1531 -- Add quote around argument if it contains spaces
1533 C_Argument_Needs_Quote : Integer;
1534 pragma Import (C, C_Argument_Needs_Quote, "__gnat_argument_needs_quote");
1535 Argument_Needs_Quote : constant Boolean := C_Argument_Needs_Quote /= 0;
1537 --------------------
1538 -- Quote_Argument --
1539 --------------------
1541 procedure Quote_Argument (Arg : in out String_Access) is
1542 Res : String (1 .. Arg'Length * 2);
1544 Quote_Needed : Boolean := False;
1547 if Arg (Arg'First) /= '"' or else Arg (Arg'Last) /= '"' then
1553 for K in Arg'Range loop
1557 if Arg (K) = '"' then
1561 Quote_Needed := True;
1563 elsif Arg (K) = ' ' then
1565 Quote_Needed := True;
1573 if Quote_Needed then
1575 -- If null terminated string, put the quote before
1577 if Res (J) = ASCII.Nul then
1580 Res (J) := ASCII.Nul;
1582 -- If argument is terminated by '\', then double it. Otherwise
1583 -- the ending quote will be taken as-is. This is quite strange
1584 -- spawn behavior from Windows, but this is what we see!
1587 if Res (J) = '\' then
1599 Old : String_Access := Arg;
1602 Arg := new String'(Res (1 .. J));
1610 -- Start of processing for Normalize_Arguments
1613 if Argument_Needs_Quote then
1614 for K in Args'Range loop
1615 if Args (K) /= null and then Args (K)'Length /= 0 then
1616 Quote_Argument (Args (K));
1620 end Normalize_Arguments;
1622 ------------------------
1623 -- Normalize_Pathname --
1624 ------------------------
1626 function Normalize_Pathname
1628 Directory : String := "";
1629 Resolve_Links : Boolean := True;
1630 Case_Sensitive : Boolean := True) return String
1633 pragma Import (C, Max_Path, "__gnat_max_path_len");
1634 -- Maximum length of a path name
1636 procedure Get_Current_Dir
1637 (Dir : System.Address;
1638 Length : System.Address);
1639 pragma Import (C, Get_Current_Dir, "__gnat_get_current_dir");
1641 function Change_Dir (Dir_Name : String) return Integer;
1642 pragma Import (C, Change_Dir, "chdir");
1644 Path_Buffer : String (1 .. Max_Path + Max_Path + 2);
1645 End_Path : Natural := 0;
1646 Link_Buffer : String (1 .. Max_Path + 2);
1652 Max_Iterations : constant := 500;
1654 function Get_File_Names_Case_Sensitive return Integer;
1656 (C, Get_File_Names_Case_Sensitive,
1657 "__gnat_get_file_names_case_sensitive");
1659 Fold_To_Lower_Case : constant Boolean :=
1661 and then Get_File_Names_Case_Sensitive = 0;
1664 (Path : System.Address;
1665 Buf : System.Address;
1666 Bufsiz : Integer) return Integer;
1667 pragma Import (C, Readlink, "__gnat_readlink");
1669 function To_Canonical_File_Spec
1670 (Host_File : System.Address) return System.Address;
1672 (C, To_Canonical_File_Spec, "__gnat_to_canonical_file_spec");
1674 The_Name : String (1 .. Name'Length + 1);
1675 Canonical_File_Addr : System.Address;
1676 Canonical_File_Len : Integer;
1678 Need_To_Check_Drive_Letter : Boolean := False;
1679 -- Set to true if Name is an absolute path that starts with "//"
1681 function Strlen (S : System.Address) return Integer;
1682 pragma Import (C, Strlen, "strlen");
1684 function Get_Directory (Dir : String) return String;
1685 -- If Dir is not empty, return it, adding a directory separator
1686 -- if not already present, otherwise return current working directory
1687 -- with terminating directory separator.
1689 function Final_Value (S : String) return String;
1690 -- Make final adjustment to the returned string.
1691 -- To compensate for non standard path name in Interix,
1692 -- if S is "/x" or starts with "/x", where x is a capital
1693 -- letter 'A' to 'Z', add an additional '/' at the beginning
1694 -- so that the returned value starts with "//x".
1700 function Get_Directory (Dir : String) return String is
1702 -- Directory given, add directory separator if needed
1704 if Dir'Length > 0 then
1705 if Dir (Dir'Last) = Directory_Separator then
1709 Result : String (1 .. Dir'Length + 1);
1711 Result (1 .. Dir'Length) := Dir;
1712 Result (Result'Length) := Directory_Separator;
1717 -- Directory name not given, get current directory
1721 Buffer : String (1 .. Max_Path + 2);
1722 Path_Len : Natural := Max_Path;
1725 Get_Current_Dir (Buffer'Address, Path_Len'Address);
1727 if Buffer (Path_Len) /= Directory_Separator then
1728 Path_Len := Path_Len + 1;
1729 Buffer (Path_Len) := Directory_Separator;
1732 -- By default, the drive letter on Windows is in upper case
1734 if On_Windows and then Path_Len >= 2 and then
1737 System.Case_Util.To_Upper (Buffer (1 .. 1));
1740 return Buffer (1 .. Path_Len);
1745 Reference_Dir : constant String := Get_Directory (Directory);
1746 -- Current directory name specified
1752 function Final_Value (S : String) return String is
1754 -- We may need to fold S to lower case, so we need a variable
1759 -- Interix has the non standard notion of disk drive
1760 -- indicated by two '/' followed by a capital letter
1761 -- 'A' .. 'Z'. One of the two '/' may have been removed
1762 -- by Normalize_Pathname. It has to be added again.
1763 -- For other OSes, this should not make no difference.
1765 if Need_To_Check_Drive_Letter
1766 and then S'Length >= 2
1767 and then S (S'First) = '/'
1768 and then S (S'First + 1) in 'A' .. 'Z'
1769 and then (S'Length = 2 or else S (S'First + 2) = '/')
1772 Result : String (1 .. S'Length + 1);
1776 Result (2 .. Result'Last) := S;
1777 Last := Result'Last;
1779 if Fold_To_Lower_Case then
1780 System.Case_Util.To_Lower (Result);
1783 -- Remove trailing directory separator, if any
1785 if Last > 1 and then
1786 (Result (Last) = '/' or else
1787 Result (Last) = Directory_Separator)
1792 return Result (1 .. Last);
1796 if Fold_To_Lower_Case then
1797 System.Case_Util.To_Lower (S1);
1800 -- Remove trailing directory separator, if any
1805 and then (S1 (Last) = '/'
1807 S1 (Last) = Directory_Separator)
1809 -- Special case for Windows: C:\
1812 and then S1 (1) /= Directory_Separator
1813 and then S1 (2) = ':'
1822 return S1 (1 .. Last);
1826 -- Start of processing for Normalize_Pathname
1829 -- Special case, if name is null, then return null
1831 if Name'Length = 0 then
1835 -- First, convert VMS file spec to Unix file spec.
1836 -- If Name is not in VMS syntax, then this is equivalent
1837 -- to put Name at the begining of Path_Buffer.
1839 VMS_Conversion : begin
1840 The_Name (1 .. Name'Length) := Name;
1841 The_Name (The_Name'Last) := ASCII.NUL;
1843 Canonical_File_Addr := To_Canonical_File_Spec (The_Name'Address);
1844 Canonical_File_Len := Strlen (Canonical_File_Addr);
1846 -- If VMS syntax conversion has failed, return an empty string
1847 -- to indicate the failure.
1849 if Canonical_File_Len = 0 then
1854 subtype Path_String is String (1 .. Canonical_File_Len);
1855 type Path_String_Access is access Path_String;
1857 function Address_To_Access is new
1858 Unchecked_Conversion (Source => Address,
1859 Target => Path_String_Access);
1861 Path_Access : constant Path_String_Access :=
1862 Address_To_Access (Canonical_File_Addr);
1865 Path_Buffer (1 .. Canonical_File_Len) := Path_Access.all;
1866 End_Path := Canonical_File_Len;
1871 -- Replace all '/' by Directory Separators (this is for Windows)
1873 if Directory_Separator /= '/' then
1874 for Index in 1 .. End_Path loop
1875 if Path_Buffer (Index) = '/' then
1876 Path_Buffer (Index) := Directory_Separator;
1881 -- Resolve directory names for VMS and Windows
1883 -- On VMS, if we have a Unix path such as /temp/..., and TEMP is a
1884 -- logical name, we need to resolve this logical name.
1886 -- On Windows, if we have an absolute path starting with a directory
1887 -- separator, we need to have the drive letter appended in front.
1889 -- For both platforms, Get_Current_Dir will return a suitable
1890 -- directory name (logical names resolved on VMS, path starting with
1891 -- a drive letter on Windows). So we find the directory, change to it,
1892 -- call Get_Current_Dir and change the directory to the returned value.
1893 -- Then, of course, we return to the previous directory.
1895 if (OpenVMS or On_Windows)
1896 and then Path_Buffer (1) = Directory_Separator
1899 Cur_Dir : String := Get_Directory ("");
1900 -- Save the current directory, so that we can change dir back to
1901 -- it. It is not a constant, because the last character (a
1902 -- directory separator) is changed to ASCII.NUL to call the C
1905 Path : String := Path_Buffer (1 .. End_Path + 1);
1906 -- Copy of the current path. One character is added that may be
1907 -- set to ASCII.NUL to call chdir.
1909 Pos : Positive := End_Path;
1910 -- Position of the last directory separator
1913 -- Value returned by chdir
1916 -- Look for the last directory separator
1918 while Path (Pos) /= Directory_Separator loop
1922 -- Get the previous character that is not a directory separator
1924 while Pos > 1 and then Path (Pos) = Directory_Separator loop
1928 -- If we are at the start of the path, take the full path.
1929 -- It may be a file in the root directory, but it may also be
1930 -- a subdirectory of the root directory.
1936 -- Add the ASCII.NUL to be able to call the C function chdir
1938 Path (Pos + 1) := ASCII.NUL;
1940 Status := Change_Dir (Path (1 .. Pos + 1));
1942 -- If Status is not zero, then we do nothing: this is a file
1943 -- path or it is not a valid directory path.
1947 New_Dir : constant String := Get_Directory ("");
1948 -- The directory path
1950 New_Path : String (1 .. New_Dir'Length + End_Path - Pos);
1951 -- The new complete path, that is built below
1954 New_Path (1 .. New_Dir'Length) := New_Dir;
1955 New_Path (New_Dir'Length + 1 .. New_Path'Last) :=
1956 Path_Buffer (Pos + 1 .. End_Path);
1957 End_Path := New_Path'Length;
1958 Path_Buffer (1 .. End_Path) := New_Path;
1961 -- Back to where we were before
1963 Cur_Dir (Cur_Dir'Last) := ASCII.NUL;
1964 Status := Change_Dir (Cur_Dir);
1969 -- Start the conversions
1971 -- If this is not finished after Max_Iterations, give up and return an
1974 for J in 1 .. Max_Iterations loop
1976 -- If we don't have an absolute pathname, prepend the directory
1980 and then not Is_Absolute_Path (Path_Buffer (1 .. End_Path))
1983 (Reference_Dir'Last + 1 .. Reference_Dir'Length + End_Path) :=
1984 Path_Buffer (1 .. End_Path);
1985 End_Path := Reference_Dir'Length + End_Path;
1986 Path_Buffer (1 .. Reference_Dir'Length) := Reference_Dir;
1987 Last := Reference_Dir'Length;
1990 -- If name starts with "//", we may have a drive letter on Interix
1992 if Last = 1 and then End_Path >= 3 then
1993 Need_To_Check_Drive_Letter := (Path_Buffer (1 .. 2)) = "//";
1999 -- Ensure that Windows network drives are kept, e.g: \\server\drive-c
2002 and then Directory_Separator = '\'
2003 and then Path_Buffer (1 .. 2) = "\\"
2008 -- If we have traversed the full pathname, return it
2010 if Start > End_Path then
2011 return Final_Value (Path_Buffer (1 .. End_Path));
2014 -- Remove duplicate directory separators
2016 while Path_Buffer (Start) = Directory_Separator loop
2017 if Start = End_Path then
2018 return Final_Value (Path_Buffer (1 .. End_Path - 1));
2021 Path_Buffer (Start .. End_Path - 1) :=
2022 Path_Buffer (Start + 1 .. End_Path);
2023 End_Path := End_Path - 1;
2027 -- Find the end of the current field: last character or the one
2028 -- preceding the next directory separator.
2030 while Finish < End_Path
2031 and then Path_Buffer (Finish + 1) /= Directory_Separator
2033 Finish := Finish + 1;
2038 if Start = Finish and then Path_Buffer (Start) = '.' then
2039 if Start = End_Path then
2041 return (1 => Directory_Separator);
2044 if Fold_To_Lower_Case then
2045 System.Case_Util.To_Lower (Path_Buffer (1 .. Last - 1));
2048 return Path_Buffer (1 .. Last - 1);
2053 Path_Buffer (Last + 1 .. End_Path - 2) :=
2054 Path_Buffer (Last + 3 .. End_Path);
2055 End_Path := End_Path - 2;
2058 -- Remove ".." fields
2060 elsif Finish = Start + 1
2061 and then Path_Buffer (Start .. Finish) = ".."
2066 exit when Start < 1 or else
2067 Path_Buffer (Start) = Directory_Separator;
2071 if Finish = End_Path then
2072 return (1 => Directory_Separator);
2075 Path_Buffer (1 .. End_Path - Finish) :=
2076 Path_Buffer (Finish + 1 .. End_Path);
2077 End_Path := End_Path - Finish;
2082 if Finish = End_Path then
2083 return Final_Value (Path_Buffer (1 .. Start - 1));
2086 Path_Buffer (Start + 1 .. Start + End_Path - Finish - 1) :=
2087 Path_Buffer (Finish + 2 .. End_Path);
2088 End_Path := Start + End_Path - Finish - 1;
2093 -- Check if current field is a symbolic link
2095 elsif Resolve_Links then
2097 Saved : constant Character := Path_Buffer (Finish + 1);
2100 Path_Buffer (Finish + 1) := ASCII.NUL;
2101 Status := Readlink (Path_Buffer'Address,
2102 Link_Buffer'Address,
2103 Link_Buffer'Length);
2104 Path_Buffer (Finish + 1) := Saved;
2107 -- Not a symbolic link, move to the next field, if any
2112 -- Replace symbolic link with its value
2115 if Is_Absolute_Path (Link_Buffer (1 .. Status)) then
2116 Path_Buffer (Status + 1 .. End_Path - (Finish - Status)) :=
2117 Path_Buffer (Finish + 1 .. End_Path);
2118 End_Path := End_Path - (Finish - Status);
2119 Path_Buffer (1 .. Status) := Link_Buffer (1 .. Status);
2124 (Last + Status + 1 .. End_Path - Finish + Last + Status) :=
2125 Path_Buffer (Finish + 1 .. End_Path);
2126 End_Path := End_Path - Finish + Last + Status;
2127 Path_Buffer (Last + 1 .. Last + Status) :=
2128 Link_Buffer (1 .. Status);
2137 -- Too many iterations: give up
2139 -- This can happen when there is a circularity in the symbolic links: A
2140 -- is a symbolic link for B, which itself is a symbolic link, and the
2141 -- target of B or of another symbolic link target of B is A. In this
2142 -- case, we return an empty string to indicate failure to resolve.
2145 end Normalize_Pathname;
2152 (Name : C_File_Name;
2153 Fmode : Mode) return File_Descriptor
2155 function C_Open_Read
2156 (Name : C_File_Name;
2157 Fmode : Mode) return File_Descriptor;
2158 pragma Import (C, C_Open_Read, "__gnat_open_read");
2160 return C_Open_Read (Name, Fmode);
2165 Fmode : Mode) return File_Descriptor
2167 C_Name : String (1 .. Name'Length + 1);
2169 C_Name (1 .. Name'Length) := Name;
2170 C_Name (C_Name'Last) := ASCII.NUL;
2171 return Open_Read (C_Name (C_Name'First)'Address, Fmode);
2174 ---------------------
2175 -- Open_Read_Write --
2176 ---------------------
2178 function Open_Read_Write
2179 (Name : C_File_Name;
2180 Fmode : Mode) return File_Descriptor
2182 function C_Open_Read_Write
2183 (Name : C_File_Name;
2184 Fmode : Mode) return File_Descriptor;
2185 pragma Import (C, C_Open_Read_Write, "__gnat_open_rw");
2187 return C_Open_Read_Write (Name, Fmode);
2188 end Open_Read_Write;
2190 function Open_Read_Write
2192 Fmode : Mode) return File_Descriptor
2194 C_Name : String (1 .. Name'Length + 1);
2196 C_Name (1 .. Name'Length) := Name;
2197 C_Name (C_Name'Last) := ASCII.NUL;
2198 return Open_Read_Write (C_Name (C_Name'First)'Address, Fmode);
2199 end Open_Read_Write;
2206 (FD : File_Descriptor;
2208 N : Integer) return Integer
2211 return Integer (System.CRTL.read
2212 (System.CRTL.int (FD), System.CRTL.chars (A), System.CRTL.int (N)));
2219 procedure Rename_File
2220 (Old_Name : C_File_Name;
2221 New_Name : C_File_Name;
2222 Success : out Boolean)
2224 function rename (From, To : Address) return Integer;
2225 pragma Import (C, rename, "rename");
2228 R := rename (Old_Name, New_Name);
2232 procedure Rename_File
2235 Success : out Boolean)
2237 C_Old_Name : String (1 .. Old_Name'Length + 1);
2238 C_New_Name : String (1 .. New_Name'Length + 1);
2240 C_Old_Name (1 .. Old_Name'Length) := Old_Name;
2241 C_Old_Name (C_Old_Name'Last) := ASCII.NUL;
2242 C_New_Name (1 .. New_Name'Length) := New_Name;
2243 C_New_Name (C_New_Name'Last) := ASCII.NUL;
2244 Rename_File (C_Old_Name'Address, C_New_Name'Address, Success);
2247 -----------------------
2248 -- Set_Close_On_Exec --
2249 -----------------------
2251 procedure Set_Close_On_Exec
2252 (FD : File_Descriptor;
2253 Close_On_Exec : Boolean;
2254 Status : out Boolean)
2256 function C_Set_Close_On_Exec
2257 (FD : File_Descriptor; Close_On_Exec : System.CRTL.int)
2258 return System.CRTL.int;
2259 pragma Import (C, C_Set_Close_On_Exec, "__gnat_set_close_on_exec");
2261 Status := C_Set_Close_On_Exec (FD, Boolean'Pos (Close_On_Exec)) = 0;
2262 end Set_Close_On_Exec;
2264 --------------------
2265 -- Set_Executable --
2266 --------------------
2268 procedure Set_Executable (Name : String) is
2269 procedure C_Set_Executable (Name : C_File_Name);
2270 pragma Import (C, C_Set_Executable, "__gnat_set_executable");
2271 C_Name : aliased String (Name'First .. Name'Last + 1);
2273 C_Name (Name'Range) := Name;
2274 C_Name (C_Name'Last) := ASCII.NUL;
2275 C_Set_Executable (C_Name (C_Name'First)'Address);
2278 --------------------
2280 --------------------
2282 procedure Set_Read_Only (Name : String) is
2283 procedure C_Set_Read_Only (Name : C_File_Name);
2284 pragma Import (C, C_Set_Read_Only, "__gnat_set_readonly");
2285 C_Name : aliased String (Name'First .. Name'Last + 1);
2287 C_Name (Name'Range) := Name;
2288 C_Name (C_Name'Last) := ASCII.NUL;
2289 C_Set_Read_Only (C_Name (C_Name'First)'Address);
2292 --------------------
2294 --------------------
2296 procedure Set_Writable (Name : String) is
2297 procedure C_Set_Writable (Name : C_File_Name);
2298 pragma Import (C, C_Set_Writable, "__gnat_set_writable");
2299 C_Name : aliased String (Name'First .. Name'Last + 1);
2301 C_Name (Name'Range) := Name;
2302 C_Name (C_Name'Last) := ASCII.NUL;
2303 C_Set_Writable (C_Name (C_Name'First)'Address);
2310 procedure Setenv (Name : String; Value : String) is
2311 F_Name : String (1 .. Name'Length + 1);
2312 F_Value : String (1 .. Value'Length + 1);
2314 procedure Set_Env_Value (Name, Value : System.Address);
2315 pragma Import (C, Set_Env_Value, "__gnat_setenv");
2318 F_Name (1 .. Name'Length) := Name;
2319 F_Name (F_Name'Last) := ASCII.NUL;
2321 F_Value (1 .. Value'Length) := Value;
2322 F_Value (F_Value'Last) := ASCII.NUL;
2324 Set_Env_Value (F_Name'Address, F_Value'Address);
2332 (Program_Name : String;
2333 Args : Argument_List) return Integer
2338 Spawn_Internal (Program_Name, Args, Result, Junk, Blocking => True);
2343 (Program_Name : String;
2344 Args : Argument_List;
2345 Success : out Boolean)
2348 Success := (Spawn (Program_Name, Args) = 0);
2352 (Program_Name : String;
2353 Args : Argument_List;
2354 Output_File_Descriptor : File_Descriptor;
2355 Return_Code : out Integer;
2356 Err_To_Out : Boolean := True)
2358 Saved_Output : File_Descriptor;
2359 Saved_Error : File_Descriptor := Invalid_FD; -- prevent compiler warning
2362 -- Set standard output and error to the temporary file
2364 Saved_Output := Dup (Standout);
2365 Dup2 (Output_File_Descriptor, Standout);
2368 Saved_Error := Dup (Standerr);
2369 Dup2 (Output_File_Descriptor, Standerr);
2372 -- Spawn the program
2374 Return_Code := Spawn (Program_Name, Args);
2376 -- Restore the standard output and error
2378 Dup2 (Saved_Output, Standout);
2381 Dup2 (Saved_Error, Standerr);
2384 -- And close the saved standard output and error file descriptors
2386 Close (Saved_Output);
2389 Close (Saved_Error);
2394 (Program_Name : String;
2395 Args : Argument_List;
2396 Output_File : String;
2397 Success : out Boolean;
2398 Return_Code : out Integer;
2399 Err_To_Out : Boolean := True)
2401 FD : File_Descriptor;
2407 FD := Create_Output_Text_File (Output_File);
2409 if FD = Invalid_FD then
2414 Spawn (Program_Name, Args, FD, Return_Code, Err_To_Out);
2416 Close (FD, Success);
2419 --------------------
2420 -- Spawn_Internal --
2421 --------------------
2423 procedure Spawn_Internal
2424 (Program_Name : String;
2425 Args : Argument_List;
2426 Result : out Integer;
2427 Pid : out Process_Id;
2431 procedure Spawn (Args : Argument_List);
2432 -- Call Spawn with given argument list
2434 N_Args : Argument_List (Args'Range);
2435 -- Normalized arguments
2441 procedure Spawn (Args : Argument_List) is
2442 type Chars is array (Positive range <>) of aliased Character;
2443 type Char_Ptr is access constant Character;
2445 Command_Len : constant Positive := Program_Name'Length + 1
2446 + Args_Length (Args);
2447 Command_Last : Natural := 0;
2448 Command : aliased Chars (1 .. Command_Len);
2449 -- Command contains all characters of the Program_Name and Args, all
2450 -- terminated by ASCII.NUL characters
2452 Arg_List_Len : constant Positive := Args'Length + 2;
2453 Arg_List_Last : Natural := 0;
2454 Arg_List : aliased array (1 .. Arg_List_Len) of Char_Ptr;
2455 -- List with pointers to NUL-terminated strings of the Program_Name
2456 -- and the Args and terminated with a null pointer. We rely on the
2457 -- default initialization for the last null pointer.
2459 procedure Add_To_Command (S : String);
2460 -- Add S and a NUL character to Command, updating Last
2462 function Portable_Spawn (Args : Address) return Integer;
2463 pragma Import (C, Portable_Spawn, "__gnat_portable_spawn");
2465 function Portable_No_Block_Spawn (Args : Address) return Process_Id;
2467 (C, Portable_No_Block_Spawn, "__gnat_portable_no_block_spawn");
2469 --------------------
2470 -- Add_To_Command --
2471 --------------------
2473 procedure Add_To_Command (S : String) is
2474 First : constant Natural := Command_Last + 1;
2477 Command_Last := Command_Last + S'Length;
2479 -- Move characters one at a time, because Command has aliased
2482 -- But not volatile, so why is this necessary ???
2484 for J in S'Range loop
2485 Command (First + J - S'First) := S (J);
2488 Command_Last := Command_Last + 1;
2489 Command (Command_Last) := ASCII.NUL;
2491 Arg_List_Last := Arg_List_Last + 1;
2492 Arg_List (Arg_List_Last) := Command (First)'Access;
2495 -- Start of processing for Spawn
2498 Add_To_Command (Program_Name);
2500 for J in Args'Range loop
2501 Add_To_Command (Args (J).all);
2506 Result := Portable_Spawn (Arg_List'Address);
2508 Pid := Portable_No_Block_Spawn (Arg_List'Address);
2509 Result := Boolean'Pos (Pid /= Invalid_Pid);
2513 -- Start of processing for Spawn_Internal
2516 -- Copy arguments into a local structure
2518 for K in N_Args'Range loop
2519 N_Args (K) := new String'(Args (K).all);
2522 -- Normalize those arguments
2524 Normalize_Arguments (N_Args);
2526 -- Call spawn using the normalized arguments
2530 -- Free arguments list
2532 for K in N_Args'Range loop
2537 ---------------------------
2538 -- To_Path_String_Access --
2539 ---------------------------
2541 function To_Path_String_Access
2542 (Path_Addr : Address;
2543 Path_Len : Integer) return String_Access
2545 subtype Path_String is String (1 .. Path_Len);
2546 type Path_String_Access is access Path_String;
2548 function Address_To_Access is new
2549 Unchecked_Conversion (Source => Address,
2550 Target => Path_String_Access);
2552 Path_Access : constant Path_String_Access :=
2553 Address_To_Access (Path_Addr);
2555 Return_Val : String_Access;
2558 Return_Val := new String (1 .. Path_Len);
2560 for J in 1 .. Path_Len loop
2561 Return_Val (J) := Path_Access (J);
2565 end To_Path_String_Access;
2571 procedure Wait_Process (Pid : out Process_Id; Success : out Boolean) is
2574 function Portable_Wait (S : Address) return Process_Id;
2575 pragma Import (C, Portable_Wait, "__gnat_portable_wait");
2578 Pid := Portable_Wait (Status'Address);
2579 Success := (Status = 0);
2587 (FD : File_Descriptor;
2589 N : Integer) return Integer
2592 return Integer (System.CRTL.write
2593 (System.CRTL.int (FD), System.CRTL.chars (A), System.CRTL.int (N)));