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CodeBlocksPortable/MinGW/lib/gcc/mingw32/6.3.0/adainclude/s-os_lib.adb

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------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- S Y S T E M . O S _ L I B --
-- --
-- B o d y --
-- --
-- Copyright (C) 1995-2015, AdaCore --
-- --
-- GNAT is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
-- ware Foundation; either version 3, or (at your option) any later ver- --
-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE. --
-- --
-- As a special exception under Section 7 of GPL version 3, you are granted --
-- additional permissions described in the GCC Runtime Library Exception, --
-- version 3.1, as published by the Free Software Foundation. --
-- --
-- You should have received a copy of the GNU General Public License and --
-- a copy of the GCC Runtime Library Exception along with this program; --
-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
-- <http://www.gnu.org/licenses/>. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
pragma Compiler_Unit_Warning;
with Ada.Unchecked_Conversion;
with Ada.Unchecked_Deallocation;
with System; use System;
with System.Case_Util;
with System.CRTL;
with System.Soft_Links;
package body System.OS_Lib is
subtype size_t is CRTL.size_t;
procedure Strncpy (dest, src : System.Address; n : size_t)
renames CRTL.strncpy;
-- Imported procedures Dup and Dup2 are used in procedures Spawn and
-- Non_Blocking_Spawn.
function Dup (Fd : File_Descriptor) return File_Descriptor;
pragma Import (C, Dup, "__gnat_dup");
procedure Dup2 (Old_Fd, New_Fd : File_Descriptor);
pragma Import (C, Dup2, "__gnat_dup2");
function Copy_Attributes
(From : System.Address;
To : System.Address;
Mode : Integer) return Integer;
pragma Import (C, Copy_Attributes, "__gnat_copy_attribs");
-- Mode = 0 - copy only time stamps.
-- Mode = 1 - copy time stamps and read/write/execute attributes
-- Mode = 2 - copy read/write/execute attributes
On_Windows : constant Boolean := Directory_Separator = '\';
-- An indication that we are on Windows. Used in Normalize_Pathname, to
-- deal with drive letters in the beginning of absolute paths.
package SSL renames System.Soft_Links;
-- The following are used by Create_Temp_File
First_Temp_File_Name : constant String := "GNAT-TEMP-000000.TMP";
-- Used to initialize Current_Temp_File_Name and Temp_File_Name_Last_Digit
Current_Temp_File_Name : String := First_Temp_File_Name;
-- Name of the temp file last created
Temp_File_Name_Last_Digit : constant Positive :=
First_Temp_File_Name'Last - 4;
-- Position of the last digit in Current_Temp_File_Name
Max_Attempts : constant := 100;
-- The maximum number of attempts to create a new temp file
-----------------------
-- Local Subprograms --
-----------------------
function Args_Length (Args : Argument_List) return Natural;
-- Returns total number of characters needed to create a string of all Args
-- terminated by ASCII.NUL characters.
procedure Create_Temp_File_Internal
(FD : out File_Descriptor;
Name : out String_Access;
Stdout : Boolean);
-- Internal routine to implement two Create_Temp_File routines. If Stdout
-- is set to True the created descriptor is stdout-compatible, otherwise
-- it might not be depending on the OS. The first two parameters are as
-- in Create_Temp_File.
function C_String_Length (S : Address) return Integer;
-- Returns the length of C (null-terminated) string at S, or 0 for
-- Null_Address.
procedure Spawn_Internal
(Program_Name : String;
Args : Argument_List;
Result : out Integer;
Pid : out Process_Id;
Blocking : Boolean);
-- Internal routine to implement the two Spawn (blocking/non blocking)
-- routines. If Blocking is set to True then the spawn is blocking
-- otherwise it is non blocking. In this latter case the Pid contains the
-- process id number. The first three parameters are as in Spawn. Note that
-- Spawn_Internal normalizes the argument list before calling the low level
-- system spawn routines (see Normalize_Arguments).
--
-- Note: Normalize_Arguments is designed to do nothing if it is called more
-- than once, so calling Normalize_Arguments before calling one of the
-- spawn routines is fine.
function To_Path_String_Access
(Path_Addr : Address;
Path_Len : Integer) return String_Access;
-- Converts a C String to an Ada String. We could do this making use of
-- Interfaces.C.Strings but we prefer not to import that entire package
---------
-- "<" --
---------
function "<" (X, Y : OS_Time) return Boolean is
begin
return Long_Integer (X) < Long_Integer (Y);
end "<";
----------
-- "<=" --
----------
function "<=" (X, Y : OS_Time) return Boolean is
begin
return Long_Integer (X) <= Long_Integer (Y);
end "<=";
---------
-- ">" --
---------
function ">" (X, Y : OS_Time) return Boolean is
begin
return Long_Integer (X) > Long_Integer (Y);
end ">";
----------
-- ">=" --
----------
function ">=" (X, Y : OS_Time) return Boolean is
begin
return Long_Integer (X) >= Long_Integer (Y);
end ">=";
-----------------
-- Args_Length --
-----------------
function Args_Length (Args : Argument_List) return Natural is
Len : Natural := 0;
begin
for J in Args'Range loop
Len := Len + Args (J)'Length + 1; -- One extra for ASCII.NUL
end loop;
return Len;
end Args_Length;
-----------------------------
-- Argument_String_To_List --
-----------------------------
function Argument_String_To_List
(Arg_String : String) return Argument_List_Access
is
Max_Args : constant Integer := Arg_String'Length;
New_Argv : Argument_List (1 .. Max_Args);
Idx : Integer;
New_Argc : Natural := 0;
Cleaned : String (1 .. Arg_String'Length);
Cleaned_Idx : Natural;
-- A cleaned up version of the argument. This function is taking
-- backslash escapes when computing the bounds for arguments. It is
-- then removing the extra backslashes from the argument.
Backslash_Is_Sep : constant Boolean := Directory_Separator = '\';
-- Whether '\' is a directory separator (as on Windows), or a way to
-- quote special characters.
begin
Idx := Arg_String'First;
loop
exit when Idx > Arg_String'Last;
declare
Backqd : Boolean := False;
Quoted : Boolean := False;
begin
Cleaned_Idx := Cleaned'First;
loop
-- An unquoted space is the end of an argument
if not (Backqd or Quoted)
and then Arg_String (Idx) = ' '
then
exit;
-- Start of a quoted string
elsif not (Backqd or Quoted)
and then Arg_String (Idx) = '"'
then
Quoted := True;
Cleaned (Cleaned_Idx) := Arg_String (Idx);
Cleaned_Idx := Cleaned_Idx + 1;
-- End of a quoted string and end of an argument
elsif (Quoted and not Backqd)
and then Arg_String (Idx) = '"'
then
Cleaned (Cleaned_Idx) := Arg_String (Idx);
Cleaned_Idx := Cleaned_Idx + 1;
Idx := Idx + 1;
exit;
-- Turn off backquoting after advancing one character
elsif Backqd then
Backqd := False;
Cleaned (Cleaned_Idx) := Arg_String (Idx);
Cleaned_Idx := Cleaned_Idx + 1;
-- Following character is backquoted
elsif not Backslash_Is_Sep and then Arg_String (Idx) = '\' then
Backqd := True;
else
Cleaned (Cleaned_Idx) := Arg_String (Idx);
Cleaned_Idx := Cleaned_Idx + 1;
end if;
Idx := Idx + 1;
exit when Idx > Arg_String'Last;
end loop;
-- Found an argument
New_Argc := New_Argc + 1;
New_Argv (New_Argc) :=
new String'(Cleaned (Cleaned'First .. Cleaned_Idx - 1));
-- Skip extraneous spaces
while Idx <= Arg_String'Last and then Arg_String (Idx) = ' ' loop
Idx := Idx + 1;
end loop;
end;
end loop;
return new Argument_List'(New_Argv (1 .. New_Argc));
end Argument_String_To_List;
---------------------
-- C_String_Length --
---------------------
function C_String_Length (S : Address) return Integer is
begin
if S = Null_Address then
return 0;
else
return Integer (CRTL.strlen (S));
end if;
end C_String_Length;
-----------
-- Close --
-----------
procedure Close (FD : File_Descriptor) is
use CRTL;
Discard : constant int := close (int (FD));
begin
null;
end Close;
procedure Close (FD : File_Descriptor; Status : out Boolean) is
use CRTL;
begin
Status := (close (int (FD)) = 0);
end Close;
---------------
-- Copy_File --
---------------
procedure Copy_File
(Name : String;
Pathname : String;
Success : out Boolean;
Mode : Copy_Mode := Copy;
Preserve : Attribute := Time_Stamps)
is
From : File_Descriptor;
To : File_Descriptor;
Copy_Error : exception;
-- Internal exception raised to signal error in copy
function Build_Path (Dir : String; File : String) return String;
-- Returns pathname Dir concatenated with File adding the directory
-- separator only if needed.
procedure Copy (From : File_Descriptor; To : File_Descriptor);
-- Read data from From and place them into To. In both cases the
-- operations uses the current file position. Raises Constraint_Error
-- if a problem occurs during the copy.
procedure Copy_To (To_Name : String);
-- Does a straight copy from source to designated destination file
----------------
-- Build_Path --
----------------
function Build_Path (Dir : String; File : String) return String is
function Is_Dirsep (C : Character) return Boolean;
pragma Inline (Is_Dirsep);
-- Returns True if C is a directory separator. On Windows we
-- handle both styles of directory separator.
---------------
-- Is_Dirsep --
---------------
function Is_Dirsep (C : Character) return Boolean is
begin
return C = Directory_Separator or else C = '/';
end Is_Dirsep;
-- Local variables
Base_File_Ptr : Integer;
-- The base file name is File (Base_File_Ptr + 1 .. File'Last)
Res : String (1 .. Dir'Length + File'Length + 1);
-- Start of processing for Build_Path
begin
-- Find base file name
Base_File_Ptr := File'Last;
while Base_File_Ptr >= File'First loop
exit when Is_Dirsep (File (Base_File_Ptr));
Base_File_Ptr := Base_File_Ptr - 1;
end loop;
declare
Base_File : String renames
File (Base_File_Ptr + 1 .. File'Last);
begin
Res (1 .. Dir'Length) := Dir;
if Is_Dirsep (Dir (Dir'Last)) then
Res (Dir'Length + 1 .. Dir'Length + Base_File'Length) :=
Base_File;
return Res (1 .. Dir'Length + Base_File'Length);
else
Res (Dir'Length + 1) := Directory_Separator;
Res (Dir'Length + 2 .. Dir'Length + 1 + Base_File'Length) :=
Base_File;
return Res (1 .. Dir'Length + 1 + Base_File'Length);
end if;
end;
end Build_Path;
----------
-- Copy --
----------
procedure Copy (From : File_Descriptor; To : File_Descriptor) is
Buf_Size : constant := 200_000;
type Buf is array (1 .. Buf_Size) of Character;
type Buf_Ptr is access Buf;
Buffer : Buf_Ptr;
R : Integer;
W : Integer;
Status_From : Boolean;
Status_To : Boolean;
-- Statuses for the calls to Close
procedure Free is new Ada.Unchecked_Deallocation (Buf, Buf_Ptr);
begin
-- Check for invalid descriptors, making sure that we do not
-- accidentally leave an open file descriptor around.
if From = Invalid_FD then
if To /= Invalid_FD then
Close (To, Status_To);
end if;
raise Copy_Error;
elsif To = Invalid_FD then
Close (From, Status_From);
raise Copy_Error;
end if;
-- Allocate the buffer on the heap
Buffer := new Buf;
loop
R := Read (From, Buffer (1)'Address, Buf_Size);
-- On some systems, the buffer may not be full. So, we need to try
-- again until there is nothing to read.
exit when R = 0;
W := Write (To, Buffer (1)'Address, R);
if W < R then
-- Problem writing data, could be a disk full. Close files
-- without worrying about status, since we are raising a
-- Copy_Error exception in any case.
Close (From, Status_From);
Close (To, Status_To);
Free (Buffer);
raise Copy_Error;
end if;
end loop;
Close (From, Status_From);
Close (To, Status_To);
Free (Buffer);
if not (Status_From and Status_To) then
raise Copy_Error;
end if;
end Copy;
-------------
-- Copy_To --
-------------
procedure Copy_To (To_Name : String) is
C_From : String (1 .. Name'Length + 1);
C_To : String (1 .. To_Name'Length + 1);
begin
From := Open_Read (Name, Binary);
-- Do not clobber destination file if source file could not be opened
if From /= Invalid_FD then
To := Create_File (To_Name, Binary);
end if;
Copy (From, To);
-- Copy attributes
C_From (1 .. Name'Length) := Name;
C_From (C_From'Last) := ASCII.NUL;
C_To (1 .. To_Name'Length) := To_Name;
C_To (C_To'Last) := ASCII.NUL;
case Preserve is
when Time_Stamps =>
if Copy_Attributes (C_From'Address, C_To'Address, 0) = -1 then
raise Copy_Error;
end if;
when Full =>
if Copy_Attributes (C_From'Address, C_To'Address, 1) = -1 then
raise Copy_Error;
end if;
when None =>
null;
end case;
end Copy_To;
-- Start of processing for Copy_File
begin
Success := True;
-- The source file must exist
if not Is_Regular_File (Name) then
raise Copy_Error;
end if;
-- The source file exists
case Mode is
-- Copy case, target file must not exist
when Copy =>
-- If the target file exists, we have an error
if Is_Regular_File (Pathname) then
raise Copy_Error;
-- Case of target is a directory
elsif Is_Directory (Pathname) then
declare
Dest : constant String := Build_Path (Pathname, Name);
begin
-- If target file exists, we have an error, else do copy
if Is_Regular_File (Dest) then
raise Copy_Error;
else
Copy_To (Dest);
end if;
end;
-- Case of normal copy to file (destination does not exist)
else
Copy_To (Pathname);
end if;
-- Overwrite case (destination file may or may not exist)
when Overwrite =>
if Is_Directory (Pathname) then
Copy_To (Build_Path (Pathname, Name));
else
Copy_To (Pathname);
end if;
-- Append case (destination file may or may not exist)
when Append =>
-- Appending to existing file
if Is_Regular_File (Pathname) then
-- Append mode and destination file exists, append data at the
-- end of Pathname. But if we fail to open source file, do not
-- touch destination file at all.
From := Open_Read (Name, Binary);
if From /= Invalid_FD then
To := Open_Read_Write (Pathname, Binary);
end if;
Lseek (To, 0, Seek_End);
Copy (From, To);
-- Appending to directory, not allowed
elsif Is_Directory (Pathname) then
raise Copy_Error;
-- Appending when target file does not exist
else
Copy_To (Pathname);
end if;
end case;
-- All error cases are caught here
exception
when Copy_Error =>
Success := False;
end Copy_File;
procedure Copy_File
(Name : C_File_Name;
Pathname : C_File_Name;
Success : out Boolean;
Mode : Copy_Mode := Copy;
Preserve : Attribute := Time_Stamps)
is
Ada_Name : String_Access :=
To_Path_String_Access
(Name, C_String_Length (Name));
Ada_Pathname : String_Access :=
To_Path_String_Access
(Pathname, C_String_Length (Pathname));
begin
Copy_File (Ada_Name.all, Ada_Pathname.all, Success, Mode, Preserve);
Free (Ada_Name);
Free (Ada_Pathname);
end Copy_File;
--------------------------
-- Copy_File_Attributes --
--------------------------
procedure Copy_File_Attributes
(From : String;
To : String;
Success : out Boolean;
Copy_Timestamp : Boolean := True;
Copy_Permissions : Boolean := True)
is
F : aliased String (1 .. From'Length + 1);
Mode : Integer;
T : aliased String (1 .. To'Length + 1);
begin
if Copy_Timestamp then
if Copy_Permissions then
Mode := 1;
else
Mode := 0;
end if;
else
if Copy_Permissions then
Mode := 2;
else
Success := True;
return; -- nothing to do
end if;
end if;
F (1 .. From'Length) := From;
F (F'Last) := ASCII.NUL;
T (1 .. To'Length) := To;
T (T'Last) := ASCII.NUL;
Success := Copy_Attributes (F'Address, T'Address, Mode) /= -1;
end Copy_File_Attributes;
----------------------
-- Copy_Time_Stamps --
----------------------
procedure Copy_Time_Stamps
(Source : String;
Dest : String;
Success : out Boolean)
is
begin
if Is_Regular_File (Source) and then Is_Writable_File (Dest) then
declare
C_Source : String (1 .. Source'Length + 1);
C_Dest : String (1 .. Dest'Length + 1);
begin
C_Source (1 .. Source'Length) := Source;
C_Source (C_Source'Last) := ASCII.NUL;
C_Dest (1 .. Dest'Length) := Dest;
C_Dest (C_Dest'Last) := ASCII.NUL;
if Copy_Attributes (C_Source'Address, C_Dest'Address, 0) = -1 then
Success := False;
else
Success := True;
end if;
end;
else
Success := False;
end if;
end Copy_Time_Stamps;
procedure Copy_Time_Stamps
(Source : C_File_Name;
Dest : C_File_Name;
Success : out Boolean)
is
Ada_Source : String_Access :=
To_Path_String_Access
(Source, C_String_Length (Source));
Ada_Dest : String_Access :=
To_Path_String_Access
(Dest, C_String_Length (Dest));
begin
Copy_Time_Stamps (Ada_Source.all, Ada_Dest.all, Success);
Free (Ada_Source);
Free (Ada_Dest);
end Copy_Time_Stamps;
-----------------
-- Create_File --
-----------------
function Create_File
(Name : C_File_Name;
Fmode : Mode) return File_Descriptor
is
function C_Create_File
(Name : C_File_Name;
Fmode : Mode) return File_Descriptor;
pragma Import (C, C_Create_File, "__gnat_open_create");
begin
return C_Create_File (Name, Fmode);
end Create_File;
function Create_File
(Name : String;
Fmode : Mode) return File_Descriptor
is
C_Name : String (1 .. Name'Length + 1);
begin
C_Name (1 .. Name'Length) := Name;
C_Name (C_Name'Last) := ASCII.NUL;
return Create_File (C_Name (C_Name'First)'Address, Fmode);
end Create_File;
---------------------
-- Create_New_File --
---------------------
function Create_New_File
(Name : C_File_Name;
Fmode : Mode) return File_Descriptor
is
function C_Create_New_File
(Name : C_File_Name;
Fmode : Mode) return File_Descriptor;
pragma Import (C, C_Create_New_File, "__gnat_open_new");
begin
return C_Create_New_File (Name, Fmode);
end Create_New_File;
function Create_New_File
(Name : String;
Fmode : Mode) return File_Descriptor
is
C_Name : String (1 .. Name'Length + 1);
begin
C_Name (1 .. Name'Length) := Name;
C_Name (C_Name'Last) := ASCII.NUL;
return Create_New_File (C_Name (C_Name'First)'Address, Fmode);
end Create_New_File;
-----------------------------
-- Create_Output_Text_File --
-----------------------------
function Create_Output_Text_File (Name : String) return File_Descriptor is
function C_Create_File (Name : C_File_Name) return File_Descriptor;
pragma Import (C, C_Create_File, "__gnat_create_output_file");
C_Name : String (1 .. Name'Length + 1);
begin
C_Name (1 .. Name'Length) := Name;
C_Name (C_Name'Last) := ASCII.NUL;
return C_Create_File (C_Name (C_Name'First)'Address);
end Create_Output_Text_File;
----------------------
-- Create_Temp_File --
----------------------
procedure Create_Temp_File
(FD : out File_Descriptor;
Name : out Temp_File_Name)
is
function Open_New_Temp
(Name : System.Address;
Fmode : Mode) return File_Descriptor;
pragma Import (C, Open_New_Temp, "__gnat_open_new_temp");
begin
FD := Open_New_Temp (Name'Address, Binary);
end Create_Temp_File;
procedure Create_Temp_File
(FD : out File_Descriptor;
Name : out String_Access)
is
begin
Create_Temp_File_Internal (FD, Name, Stdout => False);
end Create_Temp_File;
-----------------------------
-- Create_Temp_Output_File --
-----------------------------
procedure Create_Temp_Output_File
(FD : out File_Descriptor;
Name : out String_Access)
is
begin
Create_Temp_File_Internal (FD, Name, Stdout => True);
end Create_Temp_Output_File;
-------------------------------
-- Create_Temp_File_Internal --
-------------------------------
procedure Create_Temp_File_Internal
(FD : out File_Descriptor;
Name : out String_Access;
Stdout : Boolean)
is
Pos : Positive;
Attempts : Natural := 0;
Current : String (Current_Temp_File_Name'Range);
function Create_New_Output_Text_File
(Name : String) return File_Descriptor;
-- Similar to Create_Output_Text_File, except it fails if the file
-- already exists. We need this behavior to ensure we don't accidentally
-- open a temp file that has just been created by a concurrently running
-- process. There is no point exposing this function, as it's generally
-- not particularly useful.
---------------------------------
-- Create_New_Output_Text_File --
---------------------------------
function Create_New_Output_Text_File
(Name : String) return File_Descriptor
is
function C_Create_File (Name : C_File_Name) return File_Descriptor;
pragma Import (C, C_Create_File, "__gnat_create_output_file_new");
C_Name : String (1 .. Name'Length + 1);
begin
C_Name (1 .. Name'Length) := Name;
C_Name (C_Name'Last) := ASCII.NUL;
return C_Create_File (C_Name (C_Name'First)'Address);
end Create_New_Output_Text_File;
-- Start of processing for Create_Temp_File_Internal
begin
-- Loop until a new temp file can be created
File_Loop : loop
Locked : begin
-- We need to protect global variable Current_Temp_File_Name
-- against concurrent access by different tasks.
SSL.Lock_Task.all;
-- Start at the last digit
Pos := Temp_File_Name_Last_Digit;
Digit_Loop :
loop
-- Increment the digit by one
case Current_Temp_File_Name (Pos) is
when '0' .. '8' =>
Current_Temp_File_Name (Pos) :=
Character'Succ (Current_Temp_File_Name (Pos));
exit Digit_Loop;
when '9' =>
-- For 9, set the digit to 0 and go to the previous digit
Current_Temp_File_Name (Pos) := '0';
Pos := Pos - 1;
when others =>
-- If it is not a digit, then there are no available
-- temp file names. Return Invalid_FD. There is almost no
-- chance that this code will be ever be executed, since
-- it would mean that there are one million temp files in
-- the same directory.
SSL.Unlock_Task.all;
FD := Invalid_FD;
Name := null;
exit File_Loop;
end case;
end loop Digit_Loop;
Current := Current_Temp_File_Name;
-- We can now release the lock, because we are no longer accessing
-- Current_Temp_File_Name.
SSL.Unlock_Task.all;
exception
when others =>
SSL.Unlock_Task.all;
raise;
end Locked;
-- Attempt to create the file
if Stdout then
FD := Create_New_Output_Text_File (Current);
else
FD := Create_New_File (Current, Binary);
end if;
if FD /= Invalid_FD then
Name := new String'(Current);
exit File_Loop;
end if;
if not Is_Regular_File (Current) then
-- If the file does not already exist and we are unable to create
-- it, we give up after Max_Attempts. Otherwise, we try again with
-- the next available file name.
Attempts := Attempts + 1;
if Attempts >= Max_Attempts then
FD := Invalid_FD;
Name := null;
exit File_Loop;
end if;
end if;
end loop File_Loop;
end Create_Temp_File_Internal;
-------------------------
-- Current_Time_String --
-------------------------
function Current_Time_String return String is
subtype S23 is String (1 .. 23);
-- Holds current time in ISO 8601 format YYYY-MM-DD HH:MM:SS.SS + NUL
procedure Current_Time_String (Time : System.Address);
pragma Import (C, Current_Time_String, "__gnat_current_time_string");
-- Puts current time into Time in above ISO 8601 format
Result23 : aliased S23;
-- Current time in ISO 8601 format
begin
Current_Time_String (Result23'Address);
return Result23 (1 .. 19);
end Current_Time_String;
-----------------
-- Delete_File --
-----------------
procedure Delete_File (Name : Address; Success : out Boolean) is
R : Integer;
begin
R := System.CRTL.unlink (Name);
Success := (R = 0);
end Delete_File;
procedure Delete_File (Name : String; Success : out Boolean) is
C_Name : String (1 .. Name'Length + 1);
begin
C_Name (1 .. Name'Length) := Name;
C_Name (C_Name'Last) := ASCII.NUL;
Delete_File (C_Name'Address, Success);
end Delete_File;
-------------------
-- Errno_Message --
-------------------
function Errno_Message
(Err : Integer := Errno;
Default : String := "") return String
is
function strerror (errnum : Integer) return System.Address;
pragma Import (C, strerror, "strerror");
C_Msg : constant System.Address := strerror (Err);
begin
if C_Msg = Null_Address then
if Default /= "" then
return Default;
else
-- Note: for bootstrap reasons, it is impractical
-- to use Integer'Image here.
declare
Val : Integer;
First : Integer;
Buf : String (1 .. 20);
-- Buffer large enough to hold image of largest Integer values
begin
Val := abs Err;
First := Buf'Last;
loop
Buf (First) :=
Character'Val (Character'Pos ('0') + Val mod 10);
Val := Val / 10;
exit when Val = 0;
First := First - 1;
end loop;
if Err < 0 then
First := First - 1;
Buf (First) := '-';
end if;
return "errno = " & Buf (First .. Buf'Last);
end;
end if;
else
declare
Msg : String (1 .. Integer (CRTL.strlen (C_Msg)));
for Msg'Address use C_Msg;
pragma Import (Ada, Msg);
begin
return Msg;
end;
end if;
end Errno_Message;
---------------------
-- File_Time_Stamp --
---------------------
function File_Time_Stamp (FD : File_Descriptor) return OS_Time is
function File_Time (FD : File_Descriptor) return OS_Time;
pragma Import (C, File_Time, "__gnat_file_time_fd");
begin
return File_Time (FD);
end File_Time_Stamp;
function File_Time_Stamp (Name : C_File_Name) return OS_Time is
function File_Time (Name : Address) return OS_Time;
pragma Import (C, File_Time, "__gnat_file_time_name");
begin
return File_Time (Name);
end File_Time_Stamp;
function File_Time_Stamp (Name : String) return OS_Time is
F_Name : String (1 .. Name'Length + 1);
begin
F_Name (1 .. Name'Length) := Name;
F_Name (F_Name'Last) := ASCII.NUL;
return File_Time_Stamp (F_Name'Address);
end File_Time_Stamp;
---------------------------
-- Get_Debuggable_Suffix --
---------------------------
function Get_Debuggable_Suffix return String_Access is
procedure Get_Suffix_Ptr (Length, Ptr : Address);
pragma Import (C, Get_Suffix_Ptr, "__gnat_get_debuggable_suffix_ptr");
Result : String_Access;
Suffix_Length : Integer;
Suffix_Ptr : Address;
begin
Get_Suffix_Ptr (Suffix_Length'Address, Suffix_Ptr'Address);
Result := new String (1 .. Suffix_Length);
if Suffix_Length > 0 then
Strncpy (Result.all'Address, Suffix_Ptr, size_t (Suffix_Length));
end if;
return Result;
end Get_Debuggable_Suffix;
---------------------------
-- Get_Executable_Suffix --
---------------------------
function Get_Executable_Suffix return String_Access is
procedure Get_Suffix_Ptr (Length, Ptr : Address);
pragma Import (C, Get_Suffix_Ptr, "__gnat_get_executable_suffix_ptr");
Result : String_Access;
Suffix_Length : Integer;
Suffix_Ptr : Address;
begin
Get_Suffix_Ptr (Suffix_Length'Address, Suffix_Ptr'Address);
Result := new String (1 .. Suffix_Length);
if Suffix_Length > 0 then
Strncpy (Result.all'Address, Suffix_Ptr, size_t (Suffix_Length));
end if;
return Result;
end Get_Executable_Suffix;
-----------------------
-- Get_Object_Suffix --
-----------------------
function Get_Object_Suffix return String_Access is
procedure Get_Suffix_Ptr (Length, Ptr : Address);
pragma Import (C, Get_Suffix_Ptr, "__gnat_get_object_suffix_ptr");
Result : String_Access;
Suffix_Length : Integer;
Suffix_Ptr : Address;
begin
Get_Suffix_Ptr (Suffix_Length'Address, Suffix_Ptr'Address);
Result := new String (1 .. Suffix_Length);
if Suffix_Length > 0 then
Strncpy (Result.all'Address, Suffix_Ptr, size_t (Suffix_Length));
end if;
return Result;
end Get_Object_Suffix;
----------------------------------
-- Get_Target_Debuggable_Suffix --
----------------------------------
function Get_Target_Debuggable_Suffix return String_Access is
Target_Exec_Ext_Ptr : Address;
pragma Import
(C, Target_Exec_Ext_Ptr, "__gnat_target_debuggable_extension");
Result : String_Access;
Suffix_Length : Integer;
begin
Suffix_Length := Integer (CRTL.strlen (Target_Exec_Ext_Ptr));
Result := new String (1 .. Suffix_Length);
if Suffix_Length > 0 then
Strncpy
(Result.all'Address, Target_Exec_Ext_Ptr, size_t (Suffix_Length));
end if;
return Result;
end Get_Target_Debuggable_Suffix;
----------------------------------
-- Get_Target_Executable_Suffix --
----------------------------------
function Get_Target_Executable_Suffix return String_Access is
Target_Exec_Ext_Ptr : Address;
pragma Import
(C, Target_Exec_Ext_Ptr, "__gnat_target_executable_extension");
Result : String_Access;
Suffix_Length : Integer;
begin
Suffix_Length := Integer (CRTL.strlen (Target_Exec_Ext_Ptr));
Result := new String (1 .. Suffix_Length);
if Suffix_Length > 0 then
Strncpy
(Result.all'Address, Target_Exec_Ext_Ptr, size_t (Suffix_Length));
end if;
return Result;
end Get_Target_Executable_Suffix;
------------------------------
-- Get_Target_Object_Suffix --
------------------------------
function Get_Target_Object_Suffix return String_Access is
Target_Object_Ext_Ptr : Address;
pragma Import
(C, Target_Object_Ext_Ptr, "__gnat_target_object_extension");
Result : String_Access;
Suffix_Length : Integer;
begin
Suffix_Length := Integer (CRTL.strlen (Target_Object_Ext_Ptr));
Result := new String (1 .. Suffix_Length);
if Suffix_Length > 0 then
Strncpy
(Result.all'Address, Target_Object_Ext_Ptr, size_t (Suffix_Length));
end if;
return Result;
end Get_Target_Object_Suffix;
------------
-- Getenv --
------------
function Getenv (Name : String) return String_Access is
procedure Get_Env_Value_Ptr (Name, Length, Ptr : Address);
pragma Import (C, Get_Env_Value_Ptr, "__gnat_getenv");
Env_Value_Ptr : aliased Address;
Env_Value_Length : aliased Integer;
F_Name : aliased String (1 .. Name'Length + 1);
Result : String_Access;
begin
F_Name (1 .. Name'Length) := Name;
F_Name (F_Name'Last) := ASCII.NUL;
Get_Env_Value_Ptr
(F_Name'Address, Env_Value_Length'Address, Env_Value_Ptr'Address);
Result := new String (1 .. Env_Value_Length);
if Env_Value_Length > 0 then
Strncpy
(Result.all'Address, Env_Value_Ptr, size_t (Env_Value_Length));
end if;
return Result;
end Getenv;
------------
-- GM_Day --
------------
function GM_Day (Date : OS_Time) return Day_Type is
D : Day_Type;
Y : Year_Type;
Mo : Month_Type;
H : Hour_Type;
Mn : Minute_Type;
S : Second_Type;
pragma Unreferenced (Y, Mo, H, Mn, S);
begin
GM_Split (Date, Y, Mo, D, H, Mn, S);
return D;
end GM_Day;
-------------
-- GM_Hour --
-------------
function GM_Hour (Date : OS_Time) return Hour_Type is
H : Hour_Type;
Y : Year_Type;
Mo : Month_Type;
D : Day_Type;
Mn : Minute_Type;
S : Second_Type;
pragma Unreferenced (Y, Mo, D, Mn, S);
begin
GM_Split (Date, Y, Mo, D, H, Mn, S);
return H;
end GM_Hour;
---------------
-- GM_Minute --
---------------
function GM_Minute (Date : OS_Time) return Minute_Type is
Mn : Minute_Type;
Y : Year_Type;
Mo : Month_Type;
D : Day_Type;
H : Hour_Type;
S : Second_Type;
pragma Unreferenced (Y, Mo, D, H, S);
begin
GM_Split (Date, Y, Mo, D, H, Mn, S);
return Mn;
end GM_Minute;
--------------
-- GM_Month --
--------------
function GM_Month (Date : OS_Time) return Month_Type is
Mo : Month_Type;
Y : Year_Type;
D : Day_Type;
H : Hour_Type;
Mn : Minute_Type;
S : Second_Type;
pragma Unreferenced (Y, D, H, Mn, S);
begin
GM_Split (Date, Y, Mo, D, H, Mn, S);
return Mo;
end GM_Month;
---------------
-- GM_Second --
---------------
function GM_Second (Date : OS_Time) return Second_Type is
S : Second_Type;
Y : Year_Type;
Mo : Month_Type;
D : Day_Type;
H : Hour_Type;
Mn : Minute_Type;
pragma Unreferenced (Y, Mo, D, H, Mn);
begin
GM_Split (Date, Y, Mo, D, H, Mn, S);
return S;
end GM_Second;
--------------
-- GM_Split --
--------------
procedure GM_Split
(Date : OS_Time;
Year : out Year_Type;
Month : out Month_Type;
Day : out Day_Type;
Hour : out Hour_Type;
Minute : out Minute_Type;
Second : out Second_Type)
is
procedure To_GM_Time
(P_Time_T : Address;
P_Year : Address;
P_Month : Address;
P_Day : Address;
P_Hours : Address;
P_Mins : Address;
P_Secs : Address);
pragma Import (C, To_GM_Time, "__gnat_to_gm_time");
T : OS_Time := Date;
Y : Integer;
Mo : Integer;
D : Integer;
H : Integer;
Mn : Integer;
S : Integer;
begin
-- Use the global lock because To_GM_Time is not thread safe
Locked_Processing : begin
SSL.Lock_Task.all;
To_GM_Time
(P_Time_T => T'Address,
P_Year => Y'Address,
P_Month => Mo'Address,
P_Day => D'Address,
P_Hours => H'Address,
P_Mins => Mn'Address,
P_Secs => S'Address);
SSL.Unlock_Task.all;
exception
when others =>
SSL.Unlock_Task.all;
raise;
end Locked_Processing;
Year := Y + 1900;
Month := Mo + 1;
Day := D;
Hour := H;
Minute := Mn;
Second := S;
end GM_Split;
----------------
-- GM_Time_Of --
----------------
function GM_Time_Of
(Year : Year_Type;
Month : Month_Type;
Day : Day_Type;
Hour : Hour_Type;
Minute : Minute_Type;
Second : Second_Type) return OS_Time
is
procedure To_OS_Time
(P_Time_T : Address;
P_Year : Integer;
P_Month : Integer;
P_Day : Integer;
P_Hours : Integer;
P_Mins : Integer;
P_Secs : Integer);
pragma Import (C, To_OS_Time, "__gnat_to_os_time");
Result : OS_Time;
begin
To_OS_Time
(P_Time_T => Result'Address,
P_Year => Year - 1900,
P_Month => Month - 1,
P_Day => Day,
P_Hours => Hour,
P_Mins => Minute,
P_Secs => Second);
return Result;
end GM_Time_Of;
-------------
-- GM_Year --
-------------
function GM_Year (Date : OS_Time) return Year_Type is
Y : Year_Type;
Mo : Month_Type;
D : Day_Type;
H : Hour_Type;
Mn : Minute_Type;
S : Second_Type;
pragma Unreferenced (Mo, D, H, Mn, S);
begin
GM_Split (Date, Y, Mo, D, H, Mn, S);
return Y;
end GM_Year;
----------------------
-- Is_Absolute_Path --
----------------------
function Is_Absolute_Path (Name : String) return Boolean is
function Is_Absolute_Path
(Name : Address;
Length : Integer) return Integer;
pragma Import (C, Is_Absolute_Path, "__gnat_is_absolute_path");
begin
return Is_Absolute_Path (Name'Address, Name'Length) /= 0;
end Is_Absolute_Path;
------------------
-- Is_Directory --
------------------
function Is_Directory (Name : C_File_Name) return Boolean is
function Is_Directory (Name : Address) return Integer;
pragma Import (C, Is_Directory, "__gnat_is_directory");
begin
return Is_Directory (Name) /= 0;
end Is_Directory;
function Is_Directory (Name : String) return Boolean is
F_Name : String (1 .. Name'Length + 1);
begin
F_Name (1 .. Name'Length) := Name;
F_Name (F_Name'Last) := ASCII.NUL;
return Is_Directory (F_Name'Address);
end Is_Directory;
----------------------
-- Is_Readable_File --
----------------------
function Is_Readable_File (Name : C_File_Name) return Boolean is
function Is_Readable_File (Name : Address) return Integer;
pragma Import (C, Is_Readable_File, "__gnat_is_readable_file");
begin
return Is_Readable_File (Name) /= 0;
end Is_Readable_File;
function Is_Readable_File (Name : String) return Boolean is
F_Name : String (1 .. Name'Length + 1);
begin
F_Name (1 .. Name'Length) := Name;
F_Name (F_Name'Last) := ASCII.NUL;
return Is_Readable_File (F_Name'Address);
end Is_Readable_File;
------------------------
-- Is_Executable_File --
------------------------
function Is_Executable_File (Name : C_File_Name) return Boolean is
function Is_Executable_File (Name : Address) return Integer;
pragma Import (C, Is_Executable_File, "__gnat_is_executable_file");
begin
return Is_Executable_File (Name) /= 0;
end Is_Executable_File;
function Is_Executable_File (Name : String) return Boolean is
F_Name : String (1 .. Name'Length + 1);
begin
F_Name (1 .. Name'Length) := Name;
F_Name (F_Name'Last) := ASCII.NUL;
return Is_Executable_File (F_Name'Address);
end Is_Executable_File;
---------------------
-- Is_Regular_File --
---------------------
function Is_Regular_File (Name : C_File_Name) return Boolean is
function Is_Regular_File (Name : Address) return Integer;
pragma Import (C, Is_Regular_File, "__gnat_is_regular_file");
begin
return Is_Regular_File (Name) /= 0;
end Is_Regular_File;
function Is_Regular_File (Name : String) return Boolean is
F_Name : String (1 .. Name'Length + 1);
begin
F_Name (1 .. Name'Length) := Name;
F_Name (F_Name'Last) := ASCII.NUL;
return Is_Regular_File (F_Name'Address);
end Is_Regular_File;
----------------------
-- Is_Symbolic_Link --
----------------------
function Is_Symbolic_Link (Name : C_File_Name) return Boolean is
function Is_Symbolic_Link (Name : Address) return Integer;
pragma Import (C, Is_Symbolic_Link, "__gnat_is_symbolic_link");
begin
return Is_Symbolic_Link (Name) /= 0;
end Is_Symbolic_Link;
function Is_Symbolic_Link (Name : String) return Boolean is
F_Name : String (1 .. Name'Length + 1);
begin
F_Name (1 .. Name'Length) := Name;
F_Name (F_Name'Last) := ASCII.NUL;
return Is_Symbolic_Link (F_Name'Address);
end Is_Symbolic_Link;
----------------------
-- Is_Writable_File --
----------------------
function Is_Writable_File (Name : C_File_Name) return Boolean is
function Is_Writable_File (Name : Address) return Integer;
pragma Import (C, Is_Writable_File, "__gnat_is_writable_file");
begin
return Is_Writable_File (Name) /= 0;
end Is_Writable_File;
function Is_Writable_File (Name : String) return Boolean is
F_Name : String (1 .. Name'Length + 1);
begin
F_Name (1 .. Name'Length) := Name;
F_Name (F_Name'Last) := ASCII.NUL;
return Is_Writable_File (F_Name'Address);
end Is_Writable_File;
----------
-- Kill --
----------
procedure Kill (Pid : Process_Id; Hard_Kill : Boolean := True) is
SIGKILL : constant := 9;
SIGINT : constant := 2;
procedure C_Kill (Pid : Process_Id; Sig_Num : Integer; Close : Integer);
pragma Import (C, C_Kill, "__gnat_kill");
begin
if Hard_Kill then
C_Kill (Pid, SIGKILL, 1);
else
C_Kill (Pid, SIGINT, 1);
end if;
end Kill;
-----------------------
-- Kill_Process_Tree --
-----------------------
procedure Kill_Process_Tree
(Pid : Process_Id; Hard_Kill : Boolean := True)
is
SIGKILL : constant := 9;
SIGINT : constant := 2;
procedure C_Kill_PT (Pid : Process_Id; Sig_Num : Integer);
pragma Import (C, C_Kill_PT, "__gnat_killprocesstree");
begin
if Hard_Kill then
C_Kill_PT (Pid, SIGKILL);
else
C_Kill_PT (Pid, SIGINT);
end if;
end Kill_Process_Tree;
-------------------------
-- Locate_Exec_On_Path --
-------------------------
function Locate_Exec_On_Path
(Exec_Name : String) return String_Access
is
function Locate_Exec_On_Path (C_Exec_Name : Address) return Address;
pragma Import (C, Locate_Exec_On_Path, "__gnat_locate_exec_on_path");
C_Exec_Name : String (1 .. Exec_Name'Length + 1);
Path_Addr : Address;
Path_Len : Integer;
Result : String_Access;
begin
C_Exec_Name (1 .. Exec_Name'Length) := Exec_Name;
C_Exec_Name (C_Exec_Name'Last) := ASCII.NUL;
Path_Addr := Locate_Exec_On_Path (C_Exec_Name'Address);
Path_Len := C_String_Length (Path_Addr);
if Path_Len = 0 then
return null;
else
Result := To_Path_String_Access (Path_Addr, Path_Len);
CRTL.free (Path_Addr);
-- Always return an absolute path name
if not Is_Absolute_Path (Result.all) then
declare
Absolute_Path : constant String :=
Normalize_Pathname (Result.all, Resolve_Links => False);
begin
Free (Result);
Result := new String'(Absolute_Path);
end;
end if;
return Result;
end if;
end Locate_Exec_On_Path;
-------------------------
-- Locate_Regular_File --
-------------------------
function Locate_Regular_File
(File_Name : C_File_Name;
Path : C_File_Name) return String_Access
is
function Locate_Regular_File
(C_File_Name, Path_Val : Address) return Address;
pragma Import (C, Locate_Regular_File, "__gnat_locate_regular_file");
Path_Addr : Address;
Path_Len : Integer;
Result : String_Access;
begin
Path_Addr := Locate_Regular_File (File_Name, Path);
Path_Len := C_String_Length (Path_Addr);
if Path_Len = 0 then
return null;
else
Result := To_Path_String_Access (Path_Addr, Path_Len);
CRTL.free (Path_Addr);
return Result;
end if;
end Locate_Regular_File;
function Locate_Regular_File
(File_Name : String;
Path : String) return String_Access
is
C_File_Name : String (1 .. File_Name'Length + 1);
C_Path : String (1 .. Path'Length + 1);
Result : String_Access;
begin
C_File_Name (1 .. File_Name'Length) := File_Name;
C_File_Name (C_File_Name'Last) := ASCII.NUL;
C_Path (1 .. Path'Length) := Path;
C_Path (C_Path'Last) := ASCII.NUL;
Result := Locate_Regular_File (C_File_Name'Address, C_Path'Address);
-- Always return an absolute path name
if Result /= null and then not Is_Absolute_Path (Result.all) then
declare
Absolute_Path : constant String := Normalize_Pathname (Result.all);
begin
Free (Result);
Result := new String'(Absolute_Path);
end;
end if;
return Result;
end Locate_Regular_File;
------------------------
-- Non_Blocking_Spawn --
------------------------
function Non_Blocking_Spawn
(Program_Name : String;
Args : Argument_List) return Process_Id
is
Junk : Integer;
pragma Warnings (Off, Junk);
Pid : Process_Id;
begin
Spawn_Internal (Program_Name, Args, Junk, Pid, Blocking => False);
return Pid;
end Non_Blocking_Spawn;
function Non_Blocking_Spawn
(Program_Name : String;
Args : Argument_List;
Output_File_Descriptor : File_Descriptor;
Err_To_Out : Boolean := True) return Process_Id
is
Pid : Process_Id;
Saved_Error : File_Descriptor := Invalid_FD; -- prevent warning
Saved_Output : File_Descriptor;
begin
if Output_File_Descriptor = Invalid_FD then
return Invalid_Pid;
end if;
-- Set standard output and, if specified, error to the temporary file
Saved_Output := Dup (Standout);
Dup2 (Output_File_Descriptor, Standout);
if Err_To_Out then
Saved_Error := Dup (Standerr);
Dup2 (Output_File_Descriptor, Standerr);
end if;
-- Spawn the program
Pid := Non_Blocking_Spawn (Program_Name, Args);
-- Restore the standard output and error
Dup2 (Saved_Output, Standout);
if Err_To_Out then
Dup2 (Saved_Error, Standerr);
end if;
-- And close the saved standard output and error file descriptors
Close (Saved_Output);
if Err_To_Out then
Close (Saved_Error);
end if;
return Pid;
end Non_Blocking_Spawn;
function Non_Blocking_Spawn
(Program_Name : String;
Args : Argument_List;
Output_File : String;
Err_To_Out : Boolean := True) return Process_Id
is
Output_File_Descriptor : constant File_Descriptor :=
Create_Output_Text_File (Output_File);
Result : Process_Id;
begin
-- Do not attempt to spawn if the output file could not be created
if Output_File_Descriptor = Invalid_FD then
return Invalid_Pid;
else
Result :=
Non_Blocking_Spawn
(Program_Name, Args, Output_File_Descriptor, Err_To_Out);
-- Close the file just created for the output, as the file descriptor
-- cannot be used anywhere, being a local value. It is safe to do
-- that, as the file descriptor has been duplicated to form
-- standard output and error of the spawned process.
Close (Output_File_Descriptor);
return Result;
end if;
end Non_Blocking_Spawn;
function Non_Blocking_Spawn
(Program_Name : String;
Args : Argument_List;
Stdout_File : String;
Stderr_File : String) return Process_Id
is
Stderr_FD : constant File_Descriptor :=
Create_Output_Text_File (Stderr_File);
Stdout_FD : constant File_Descriptor :=
Create_Output_Text_File (Stdout_File);
Result : Process_Id;
Saved_Error : File_Descriptor;
Saved_Output : File_Descriptor;
begin
-- Do not attempt to spawn if the output files could not be created
if Stdout_FD = Invalid_FD or else Stderr_FD = Invalid_FD then
return Invalid_Pid;
end if;
-- Set standard output and error to the specified files
Saved_Output := Dup (Standout);
Dup2 (Stdout_FD, Standout);
Saved_Error := Dup (Standerr);
Dup2 (Stderr_FD, Standerr);
-- Spawn the program
Result := Non_Blocking_Spawn (Program_Name, Args);
-- Restore the standard output and error
Dup2 (Saved_Output, Standout);
Dup2 (Saved_Error, Standerr);
-- And close the saved standard output and error file descriptors
Close (Saved_Output);
Close (Saved_Error);
return Result;
end Non_Blocking_Spawn;
-------------------------
-- Normalize_Arguments --
-------------------------
procedure Normalize_Arguments (Args : in out Argument_List) is
procedure Quote_Argument (Arg : in out String_Access);
-- Add quote around argument if it contains spaces (or HT characters)
C_Argument_Needs_Quote : Integer;
pragma Import (C, C_Argument_Needs_Quote, "__gnat_argument_needs_quote");
Argument_Needs_Quote : constant Boolean := C_Argument_Needs_Quote /= 0;
--------------------
-- Quote_Argument --
--------------------
procedure Quote_Argument (Arg : in out String_Access) is
J : Positive := 1;
Quote_Needed : Boolean := False;
Res : String (1 .. Arg'Length * 2);
begin
if Arg (Arg'First) /= '"' or else Arg (Arg'Last) /= '"' then
-- Starting quote
Res (J) := '"';
for K in Arg'Range loop
J := J + 1;
if Arg (K) = '"' then
Res (J) := '\';
J := J + 1;
Res (J) := '"';
Quote_Needed := True;
elsif Arg (K) = ' ' or else Arg (K) = ASCII.HT then
Res (J) := Arg (K);
Quote_Needed := True;
else
Res (J) := Arg (K);
end if;
end loop;
if Quote_Needed then
-- Case of null terminated string
if Res (J) = ASCII.NUL then
-- If the string ends with \, double it
if Res (J - 1) = '\' then
Res (J) := '\';
J := J + 1;
end if;
-- Put a quote just before the null at the end
Res (J) := '"';
J := J + 1;
Res (J) := ASCII.NUL;
-- If argument is terminated by '\', then double it. Otherwise
-- the ending quote will be taken as-is. This is quite strange
-- spawn behavior from Windows, but this is what we see.
else
if Res (J) = '\' then
J := J + 1;
Res (J) := '\';
end if;
-- Ending quote
J := J + 1;
Res (J) := '"';
end if;
declare
Old : String_Access := Arg;
begin
Arg := new String'(Res (1 .. J));
Free (Old);
end;
end if;
end if;
end Quote_Argument;
-- Start of processing for Normalize_Arguments
begin
if Argument_Needs_Quote then
for K in Args'Range loop
if Args (K) /= null and then Args (K)'Length /= 0 then
Quote_Argument (Args (K));
end if;
end loop;
end if;
end Normalize_Arguments;
------------------------
-- Normalize_Pathname --
------------------------
function Normalize_Pathname
(Name : String;
Directory : String := "";
Resolve_Links : Boolean := True;
Case_Sensitive : Boolean := True) return String
is
procedure Get_Current_Dir
(Dir : System.Address;
Length : System.Address);
pragma Import (C, Get_Current_Dir, "__gnat_get_current_dir");
function Get_File_Names_Case_Sensitive return Integer;
pragma Import
(C, Get_File_Names_Case_Sensitive,
"__gnat_get_file_names_case_sensitive");
Max_Path : Integer;
pragma Import (C, Max_Path, "__gnat_max_path_len");
-- Maximum length of a path name
function Readlink
(Path : System.Address;
Buf : System.Address;
Bufsiz : Integer) return Integer;
pragma Import (C, Readlink, "__gnat_readlink");
function To_Canonical_File_Spec
(Host_File : System.Address) return System.Address;
pragma Import
(C, To_Canonical_File_Spec, "__gnat_to_canonical_file_spec");
-- Convert possible foreign file syntax to canonical form
Fold_To_Lower_Case : constant Boolean :=
not Case_Sensitive
and then Get_File_Names_Case_Sensitive = 0;
function Final_Value (S : String) return String;
-- Make final adjustment to the returned string. This function strips
-- trailing directory separators, and folds returned string to lower
-- case if required.
function Get_Directory (Dir : String) return String;
-- If Dir is not empty, return it, adding a directory separator
-- if not already present, otherwise return current working directory
-- with terminating directory separator.
-----------------
-- Final_Value --
-----------------
function Final_Value (S : String) return String is
S1 : String := S;
-- We may need to fold S to lower case, so we need a variable
Last : Natural;
begin
if Fold_To_Lower_Case then
System.Case_Util.To_Lower (S1);
end if;
-- Remove trailing directory separator, if any
Last := S1'Last;
if Last > 1
and then (S1 (Last) = '/'
or else
S1 (Last) = Directory_Separator)
then
-- Special case for Windows: C:\
if Last = 3
and then S1 (1) /= Directory_Separator
and then S1 (2) = ':'
then
null;
else
Last := Last - 1;
end if;
end if;
return S1 (1 .. Last);
end Final_Value;
-------------------
-- Get_Directory --
-------------------
function Get_Directory (Dir : String) return String is
begin
-- Directory given, add directory separator if needed
if Dir'Length > 0 then
declare
Result : String :=
Normalize_Pathname
(Dir, "", Resolve_Links, Case_Sensitive) &
Directory_Separator;
Last : Positive := Result'Last - 1;
begin
-- On Windows, change all '/' to '\'
if On_Windows then
for J in Result'First .. Last - 1 loop
if Result (J) = '/' then
Result (J) := Directory_Separator;
end if;
end loop;
end if;
-- Include additional directory separator, if needed
if Result (Last) /= Directory_Separator then
Last := Last + 1;
end if;
return Result (Result'First .. Last);
end;
-- Directory name not given, get current directory
else
declare
Buffer : String (1 .. Max_Path + 2);
Path_Len : Natural := Max_Path;
begin
Get_Current_Dir (Buffer'Address, Path_Len'Address);
if Buffer (Path_Len) /= Directory_Separator then
Path_Len := Path_Len + 1;
Buffer (Path_Len) := Directory_Separator;
end if;
-- By default, the drive letter on Windows is in upper case
if On_Windows
and then Path_Len >= 2
and then Buffer (2) = ':'
then
System.Case_Util.To_Upper (Buffer (1 .. 1));
end if;
return Buffer (1 .. Path_Len);
end;
end if;
end Get_Directory;
-- Local variables
Max_Iterations : constant := 500;
Canonical_File_Addr : System.Address;
Canonical_File_Len : Integer;
End_Path : Natural := 0;
Finish : Positive;
Last : Positive;
Link_Buffer : String (1 .. Max_Path + 2);
Path_Buffer : String (1 .. Max_Path + Max_Path + 2);
Start : Natural;
Status : Integer;
The_Name : String (1 .. Name'Length + 1);
-- Start of processing for Normalize_Pathname
begin
-- Special case, return null if name is null, or if it is bigger than
-- the biggest name allowed.
if Name'Length = 0 or else Name'Length > Max_Path then
return "";
end if;
-- First, convert possible foreign file spec to Unix file spec. If no
-- conversion is required, all this does is put Name at the beginning
-- of Path_Buffer unchanged.
File_Name_Conversion : begin
The_Name (1 .. Name'Length) := Name;
The_Name (The_Name'Last) := ASCII.NUL;
Canonical_File_Addr := To_Canonical_File_Spec (The_Name'Address);
Canonical_File_Len := Integer (CRTL.strlen (Canonical_File_Addr));
-- If syntax conversion has failed, return an empty string to
-- indicate the failure.
if Canonical_File_Len = 0 then
return "";
end if;
declare
subtype Path_String is String (1 .. Canonical_File_Len);
Canonical_File : Path_String;
for Canonical_File'Address use Canonical_File_Addr;
pragma Import (Ada, Canonical_File);
begin
Path_Buffer (1 .. Canonical_File_Len) := Canonical_File;
End_Path := Canonical_File_Len;
Last := 1;
end;
end File_Name_Conversion;
-- Replace all '/' by Directory Separators (this is for Windows)
if Directory_Separator /= '/' then
for Index in 1 .. End_Path loop
if Path_Buffer (Index) = '/' then
Path_Buffer (Index) := Directory_Separator;
end if;
end loop;
end if;
-- Resolve directory names for Windows
if On_Windows then
-- On Windows, if we have an absolute path starting with a directory
-- separator, we need to have the drive letter appended in front.
-- On Windows, Get_Current_Dir will return a suitable directory name
-- (path starting with a drive letter on Windows). So we take this
-- drive letter and prepend it to the current path.
if Path_Buffer (1) = Directory_Separator
and then Path_Buffer (2) /= Directory_Separator
then
declare
Cur_Dir : constant String := Get_Directory ("");
-- Get the current directory to get the drive letter
begin
if Cur_Dir'Length > 2
and then Cur_Dir (Cur_Dir'First + 1) = ':'
then
Path_Buffer (3 .. End_Path + 2) :=
Path_Buffer (1 .. End_Path);
Path_Buffer (1 .. 2) :=
Cur_Dir (Cur_Dir'First .. Cur_Dir'First + 1);
End_Path := End_Path + 2;
end if;
end;
-- We have a drive letter, ensure it is upper-case
elsif Path_Buffer (1) in 'a' .. 'z'
and then Path_Buffer (2) = ':'
then
System.Case_Util.To_Upper (Path_Buffer (1 .. 1));
end if;
end if;
-- On Windows, remove all double-quotes that are possibly part of the
-- path but can cause problems with other methods.
if On_Windows then
declare
Index : Natural;
begin
Index := Path_Buffer'First;
for Current in Path_Buffer'First .. End_Path loop
if Path_Buffer (Current) /= '"' then
Path_Buffer (Index) := Path_Buffer (Current);
Index := Index + 1;
end if;
end loop;
End_Path := Index - 1;
end;
end if;
-- Start the conversions
-- If this is not finished after Max_Iterations, give up and return an
-- empty string.
for J in 1 .. Max_Iterations loop
-- If we don't have an absolute pathname, prepend the directory
-- Reference_Dir.
if Last = 1
and then not Is_Absolute_Path (Path_Buffer (1 .. End_Path))
then
declare
Reference_Dir : constant String := Get_Directory (Directory);
Ref_Dir_Len : constant Natural := Reference_Dir'Length;
-- Current directory name specified and its length
begin
Path_Buffer (Ref_Dir_Len + 1 .. Ref_Dir_Len + End_Path) :=
Path_Buffer (1 .. End_Path);
End_Path := Ref_Dir_Len + End_Path;
Path_Buffer (1 .. Ref_Dir_Len) := Reference_Dir;
Last := Ref_Dir_Len;
end;
end if;
Start := Last + 1;
Finish := Last;
-- Ensure that Windows network drives are kept, e.g: \\server\drive-c
if Start = 2
and then Directory_Separator = '\'
and then Path_Buffer (1 .. 2) = "\\"
then
Start := 3;
end if;
-- If we have traversed the full pathname, return it
if Start > End_Path then
return Final_Value (Path_Buffer (1 .. End_Path));
end if;
-- Remove duplicate directory separators
while Path_Buffer (Start) = Directory_Separator loop
if Start = End_Path then
return Final_Value (Path_Buffer (1 .. End_Path - 1));
else
Path_Buffer (Start .. End_Path - 1) :=
Path_Buffer (Start + 1 .. End_Path);
End_Path := End_Path - 1;
end if;
end loop;
-- Find the end of the current field: last character or the one
-- preceding the next directory separator.
while Finish < End_Path
and then Path_Buffer (Finish + 1) /= Directory_Separator
loop
Finish := Finish + 1;
end loop;
-- Remove "." field
if Start = Finish and then Path_Buffer (Start) = '.' then
if Start = End_Path then
if Last = 1 then
return (1 => Directory_Separator);
else
if Fold_To_Lower_Case then
System.Case_Util.To_Lower (Path_Buffer (1 .. Last - 1));
end if;
return Path_Buffer (1 .. Last - 1);
end if;
else
Path_Buffer (Last + 1 .. End_Path - 2) :=
Path_Buffer (Last + 3 .. End_Path);
End_Path := End_Path - 2;
end if;
-- Remove ".." fields
elsif Finish = Start + 1
and then Path_Buffer (Start .. Finish) = ".."
then
Start := Last;
loop
Start := Start - 1;
exit when Start < 1
or else Path_Buffer (Start) = Directory_Separator;
end loop;
if Start <= 1 then
if Finish = End_Path then
return (1 => Directory_Separator);
else
Path_Buffer (1 .. End_Path - Finish) :=
Path_Buffer (Finish + 1 .. End_Path);
End_Path := End_Path - Finish;
Last := 1;
end if;
else
if Finish = End_Path then
return Final_Value (Path_Buffer (1 .. Start - 1));
else
Path_Buffer (Start + 1 .. Start + End_Path - Finish - 1) :=
Path_Buffer (Finish + 2 .. End_Path);
End_Path := Start + End_Path - Finish - 1;
Last := Start;
end if;
end if;
-- Check if current field is a symbolic link
elsif Resolve_Links then
declare
Saved : constant Character := Path_Buffer (Finish + 1);
begin
Path_Buffer (Finish + 1) := ASCII.NUL;
Status :=
Readlink
(Path => Path_Buffer'Address,
Buf => Link_Buffer'Address,
Bufsiz => Link_Buffer'Length);
Path_Buffer (Finish + 1) := Saved;
end;
-- Not a symbolic link, move to the next field, if any
if Status <= 0 then
Last := Finish + 1;
-- Replace symbolic link with its value
else
if Is_Absolute_Path (Link_Buffer (1 .. Status)) then
Path_Buffer (Status + 1 .. End_Path - (Finish - Status)) :=
Path_Buffer (Finish + 1 .. End_Path);
End_Path := End_Path - (Finish - Status);
Path_Buffer (1 .. Status) := Link_Buffer (1 .. Status);
Last := 1;
else
Path_Buffer
(Last + Status + 1 .. End_Path - Finish + Last + Status) :=
Path_Buffer (Finish + 1 .. End_Path);
End_Path := End_Path - Finish + Last + Status;
Path_Buffer (Last + 1 .. Last + Status) :=
Link_Buffer (1 .. Status);
end if;
end if;
else
Last := Finish + 1;
end if;
end loop;
-- Too many iterations: give up
-- This can happen when there is a circularity in the symbolic links: A
-- is a symbolic link for B, which itself is a symbolic link, and the
-- target of B or of another symbolic link target of B is A. In this
-- case, we return an empty string to indicate failure to resolve.
return "";
end Normalize_Pathname;
-----------------
-- Open_Append --
-----------------
function Open_Append
(Name : C_File_Name;
Fmode : Mode) return File_Descriptor
is
function C_Open_Append
(Name : C_File_Name;
Fmode : Mode) return File_Descriptor;
pragma Import (C, C_Open_Append, "__gnat_open_append");
begin
return C_Open_Append (Name, Fmode);
end Open_Append;
function Open_Append
(Name : String;
Fmode : Mode) return File_Descriptor
is
C_Name : String (1 .. Name'Length + 1);
begin
C_Name (1 .. Name'Length) := Name;
C_Name (C_Name'Last) := ASCII.NUL;
return Open_Append (C_Name (C_Name'First)'Address, Fmode);
end Open_Append;
---------------
-- Open_Read --
---------------
function Open_Read
(Name : C_File_Name;
Fmode : Mode) return File_Descriptor
is
function C_Open_Read
(Name : C_File_Name;
Fmode : Mode) return File_Descriptor;
pragma Import (C, C_Open_Read, "__gnat_open_read");
begin
return C_Open_Read (Name, Fmode);
end Open_Read;
function Open_Read
(Name : String;
Fmode : Mode) return File_Descriptor
is
C_Name : String (1 .. Name'Length + 1);
begin
C_Name (1 .. Name'Length) := Name;
C_Name (C_Name'Last) := ASCII.NUL;
return Open_Read (C_Name (C_Name'First)'Address, Fmode);
end Open_Read;
---------------------
-- Open_Read_Write --
---------------------
function Open_Read_Write
(Name : C_File_Name;
Fmode : Mode) return File_Descriptor
is
function C_Open_Read_Write
(Name : C_File_Name;
Fmode : Mode) return File_Descriptor;
pragma Import (C, C_Open_Read_Write, "__gnat_open_rw");
begin
return C_Open_Read_Write (Name, Fmode);
end Open_Read_Write;
function Open_Read_Write
(Name : String;
Fmode : Mode) return File_Descriptor
is
C_Name : String (1 .. Name'Length + 1);
begin
C_Name (1 .. Name'Length) := Name;
C_Name (C_Name'Last) := ASCII.NUL;
return Open_Read_Write (C_Name (C_Name'First)'Address, Fmode);
end Open_Read_Write;
-------------
-- OS_Exit --
-------------
procedure OS_Exit (Status : Integer) is
begin
OS_Exit_Ptr (Status);
raise Program_Error;
end OS_Exit;
---------------------
-- OS_Exit_Default --
---------------------
procedure OS_Exit_Default (Status : Integer) is
procedure GNAT_OS_Exit (Status : Integer);
pragma Import (C, GNAT_OS_Exit, "__gnat_os_exit");
pragma No_Return (GNAT_OS_Exit);
begin
GNAT_OS_Exit (Status);
end OS_Exit_Default;
--------------------
-- Pid_To_Integer --
--------------------
function Pid_To_Integer (Pid : Process_Id) return Integer is
begin
return Integer (Pid);
end Pid_To_Integer;
----------
-- Read --
----------
function Read
(FD : File_Descriptor;
A : System.Address;
N : Integer) return Integer
is
begin
return
Integer (System.CRTL.read
(System.CRTL.int (FD),
System.CRTL.chars (A),
System.CRTL.size_t (N)));
end Read;
-----------------
-- Rename_File --
-----------------
procedure Rename_File
(Old_Name : C_File_Name;
New_Name : C_File_Name;
Success : out Boolean)
is
function rename (From, To : Address) return Integer;
pragma Import (C, rename, "__gnat_rename");
R : Integer;
begin
R := rename (Old_Name, New_Name);
Success := (R = 0);
end Rename_File;
procedure Rename_File
(Old_Name : String;
New_Name : String;
Success : out Boolean)
is
C_Old_Name : String (1 .. Old_Name'Length + 1);
C_New_Name : String (1 .. New_Name'Length + 1);
begin
C_Old_Name (1 .. Old_Name'Length) := Old_Name;
C_Old_Name (C_Old_Name'Last) := ASCII.NUL;
C_New_Name (1 .. New_Name'Length) := New_Name;
C_New_Name (C_New_Name'Last) := ASCII.NUL;
Rename_File (C_Old_Name'Address, C_New_Name'Address, Success);
end Rename_File;
-----------------------
-- Set_Close_On_Exec --
-----------------------
procedure Set_Close_On_Exec
(FD : File_Descriptor;
Close_On_Exec : Boolean;
Status : out Boolean)
is
function C_Set_Close_On_Exec
(FD : File_Descriptor; Close_On_Exec : System.CRTL.int)
return System.CRTL.int;
pragma Import (C, C_Set_Close_On_Exec, "__gnat_set_close_on_exec");
begin
Status := C_Set_Close_On_Exec (FD, Boolean'Pos (Close_On_Exec)) = 0;
end Set_Close_On_Exec;
--------------------
-- Set_Executable --
--------------------
procedure Set_Executable (Name : String; Mode : Positive := S_Owner) is
procedure C_Set_Executable (Name : C_File_Name; Mode : Integer);
pragma Import (C, C_Set_Executable, "__gnat_set_executable");
C_Name : aliased String (Name'First .. Name'Last + 1);
begin
C_Name (Name'Range) := Name;
C_Name (C_Name'Last) := ASCII.NUL;
C_Set_Executable (C_Name (C_Name'First)'Address, Mode);
end Set_Executable;
-------------------------------------
-- Set_File_Last_Modify_Time_Stamp --
-------------------------------------
procedure Set_File_Last_Modify_Time_Stamp (Name : String; Time : OS_Time) is
procedure C_Set_File_Time (Name : C_File_Name; Time : OS_Time);
pragma Import (C, C_Set_File_Time, "__gnat_set_file_time_name");
C_Name : aliased String (Name'First .. Name'Last + 1);
begin
C_Name (Name'Range) := Name;
C_Name (C_Name'Last) := ASCII.NUL;
C_Set_File_Time (C_Name'Address, Time);
end Set_File_Last_Modify_Time_Stamp;
----------------------
-- Set_Non_Readable --
----------------------
procedure Set_Non_Readable (Name : String) is
procedure C_Set_Non_Readable (Name : C_File_Name);
pragma Import (C, C_Set_Non_Readable, "__gnat_set_non_readable");
C_Name : aliased String (Name'First .. Name'Last + 1);
begin
C_Name (Name'Range) := Name;
C_Name (C_Name'Last) := ASCII.NUL;
C_Set_Non_Readable (C_Name (C_Name'First)'Address);
end Set_Non_Readable;
----------------------
-- Set_Non_Writable --
----------------------
procedure Set_Non_Writable (Name : String) is
procedure C_Set_Non_Writable (Name : C_File_Name);
pragma Import (C, C_Set_Non_Writable, "__gnat_set_non_writable");
C_Name : aliased String (Name'First .. Name'Last + 1);
begin
C_Name (Name'Range) := Name;
C_Name (C_Name'Last) := ASCII.NUL;
C_Set_Non_Writable (C_Name (C_Name'First)'Address);
end Set_Non_Writable;
------------------
-- Set_Readable --
------------------
procedure Set_Readable (Name : String) is
procedure C_Set_Readable (Name : C_File_Name);
pragma Import (C, C_Set_Readable, "__gnat_set_readable");
C_Name : aliased String (Name'First .. Name'Last + 1);
begin
C_Name (Name'Range) := Name;
C_Name (C_Name'Last) := ASCII.NUL;
C_Set_Readable (C_Name (C_Name'First)'Address);
end Set_Readable;
--------------------
-- Set_Writable --
--------------------
procedure Set_Writable (Name : String) is
procedure C_Set_Writable (Name : C_File_Name);
pragma Import (C, C_Set_Writable, "__gnat_set_writable");
C_Name : aliased String (Name'First .. Name'Last + 1);
begin
C_Name (Name'Range) := Name;
C_Name (C_Name'Last) := ASCII.NUL;
C_Set_Writable (C_Name (C_Name'First)'Address);
end Set_Writable;
------------
-- Setenv --
------------
procedure Setenv (Name : String; Value : String) is
F_Name : String (1 .. Name'Length + 1);
F_Value : String (1 .. Value'Length + 1);
procedure Set_Env_Value (Name, Value : System.Address);
pragma Import (C, Set_Env_Value, "__gnat_setenv");
begin
F_Name (1 .. Name'Length) := Name;
F_Name (F_Name'Last) := ASCII.NUL;
F_Value (1 .. Value'Length) := Value;
F_Value (F_Value'Last) := ASCII.NUL;
Set_Env_Value (F_Name'Address, F_Value'Address);
end Setenv;
-----------
-- Spawn --
-----------
function Spawn
(Program_Name : String;
Args : Argument_List) return Integer
is
Junk : Process_Id;
pragma Warnings (Off, Junk);
Result : Integer;
begin
Spawn_Internal (Program_Name, Args, Result, Junk, Blocking => True);
return Result;
end Spawn;
procedure Spawn
(Program_Name : String;
Args : Argument_List;
Success : out Boolean)
is
begin
Success := (Spawn (Program_Name, Args) = 0);
end Spawn;
procedure Spawn
(Program_Name : String;
Args : Argument_List;
Output_File_Descriptor : File_Descriptor;
Return_Code : out Integer;
Err_To_Out : Boolean := True)
is
Saved_Error : File_Descriptor := Invalid_FD; -- prevent compiler warning
Saved_Output : File_Descriptor;
begin
-- Set standard output and error to the temporary file
Saved_Output := Dup (Standout);
Dup2 (Output_File_Descriptor, Standout);
if Err_To_Out then
Saved_Error := Dup (Standerr);
Dup2 (Output_File_Descriptor, Standerr);
end if;
-- Spawn the program
Return_Code := Spawn (Program_Name, Args);
-- Restore the standard output and error
Dup2 (Saved_Output, Standout);
if Err_To_Out then
Dup2 (Saved_Error, Standerr);
end if;
-- And close the saved standard output and error file descriptors
Close (Saved_Output);
if Err_To_Out then
Close (Saved_Error);
end if;
end Spawn;
procedure Spawn
(Program_Name : String;
Args : Argument_List;
Output_File : String;
Success : out Boolean;
Return_Code : out Integer;
Err_To_Out : Boolean := True)
is
FD : File_Descriptor;
begin
Success := True;
Return_Code := 0;
FD := Create_Output_Text_File (Output_File);
if FD = Invalid_FD then
Success := False;
return;
end if;
Spawn (Program_Name, Args, FD, Return_Code, Err_To_Out);
Close (FD, Success);
end Spawn;
--------------------
-- Spawn_Internal --
--------------------
procedure Spawn_Internal
(Program_Name : String;
Args : Argument_List;
Result : out Integer;
Pid : out Process_Id;
Blocking : Boolean)
is
procedure Spawn (Args : Argument_List);
-- Call Spawn with given argument list
N_Args : Argument_List (Args'Range);
-- Normalized arguments
-----------
-- Spawn --
-----------
procedure Spawn (Args : Argument_List) is
type Chars is array (Positive range <>) of aliased Character;
type Char_Ptr is access constant Character;
Command_Len : constant Positive := Program_Name'Length + 1 +
Args_Length (Args);
Command_Last : Natural := 0;
Command : aliased Chars (1 .. Command_Len);
-- Command contains all characters of the Program_Name and Args, all
-- terminated by ASCII.NUL characters.
Arg_List_Len : constant Positive := Args'Length + 2;
Arg_List_Last : Natural := 0;
Arg_List : aliased array (1 .. Arg_List_Len) of Char_Ptr;
-- List with pointers to NUL-terminated strings of the Program_Name
-- and the Args and terminated with a null pointer. We rely on the
-- default initialization for the last null pointer.
procedure Add_To_Command (S : String);
-- Add S and a NUL character to Command, updating Last
function Portable_Spawn (Args : Address) return Integer;
pragma Import (C, Portable_Spawn, "__gnat_portable_spawn");
function Portable_No_Block_Spawn (Args : Address) return Process_Id;
pragma Import
(C, Portable_No_Block_Spawn, "__gnat_portable_no_block_spawn");
--------------------
-- Add_To_Command --
--------------------
procedure Add_To_Command (S : String) is
First : constant Natural := Command_Last + 1;
begin
Command_Last := Command_Last + S'Length;
-- Move characters one at a time, because Command has aliased
-- components.
-- But not volatile, so why is this necessary ???
for J in S'Range loop
Command (First + J - S'First) := S (J);
end loop;
Command_Last := Command_Last + 1;
Command (Command_Last) := ASCII.NUL;
Arg_List_Last := Arg_List_Last + 1;
Arg_List (Arg_List_Last) := Command (First)'Access;
end Add_To_Command;
-- Start of processing for Spawn
begin
Add_To_Command (Program_Name);
for J in Args'Range loop
Add_To_Command (Args (J).all);
end loop;
if Blocking then
Pid := Invalid_Pid;
Result := Portable_Spawn (Arg_List'Address);
else
Pid := Portable_No_Block_Spawn (Arg_List'Address);
Result := Boolean'Pos (Pid /= Invalid_Pid);
end if;
end Spawn;
-- Start of processing for Spawn_Internal
begin
-- Copy arguments into a local structure
for K in N_Args'Range loop
N_Args (K) := new String'(Args (K).all);
end loop;
-- Normalize those arguments
Normalize_Arguments (N_Args);
-- Call spawn using the normalized arguments
Spawn (N_Args);
-- Free arguments list
for K in N_Args'Range loop
Free (N_Args (K));
end loop;
end Spawn_Internal;
---------------------------
-- To_Path_String_Access --
---------------------------
function To_Path_String_Access
(Path_Addr : Address;
Path_Len : Integer) return String_Access
is
subtype Path_String is String (1 .. Path_Len);
type Path_String_Access is access Path_String;
function Address_To_Access is new Ada.Unchecked_Conversion
(Source => Address, Target => Path_String_Access);
Path_Access : constant Path_String_Access :=
Address_To_Access (Path_Addr);
Return_Val : String_Access;
begin
Return_Val := new String (1 .. Path_Len);
for J in 1 .. Path_Len loop
Return_Val (J) := Path_Access (J);
end loop;
return Return_Val;
end To_Path_String_Access;
------------------
-- Wait_Process --
------------------
procedure Wait_Process (Pid : out Process_Id; Success : out Boolean) is
Status : Integer;
function Portable_Wait (S : Address) return Process_Id;
pragma Import (C, Portable_Wait, "__gnat_portable_wait");
begin
Pid := Portable_Wait (Status'Address);
Success := (Status = 0);
end Wait_Process;
-----------
-- Write --
-----------
function Write
(FD : File_Descriptor;
A : System.Address;
N : Integer) return Integer
is
begin
return
Integer (System.CRTL.write
(System.CRTL.int (FD),
System.CRTL.chars (A),
System.CRTL.size_t (N)));
end Write;
end System.OS_Lib;
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