gcc/ada/tempdir.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                              T E M P D I R                               --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --          Copyright (C) 2003-2009, Free Software Foundation, Inc.         --
  10 --                                                                          --
  11 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  12 -- terms of the  GNU General Public License as published  by the Free Soft- --
  13 -- ware  Foundation;  either version 3,  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 COPYING3.  If not, go to --
  19 -- http://www.gnu.org/licenses for a complete copy of the license.          --
  20 --                                                                          --
  21 -- GNAT was originally developed  by the GNAT team at  New York University. --
  22 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  23 --                                                                          --
  24 ------------------------------------------------------------------------------
  25
  26 with GNAT.Directory_Operations; use GNAT.Directory_Operations;
  27
  28 with Hostparm; use Hostparm;
  29 with Opt;      use Opt;
  30 with Output;   use Output;
  31
  32 package body Tempdir is
  33
  34    Tmpdir_Needs_To_Be_Displayed : Boolean := True;
  35
  36    Tmpdir    : constant String := "TMPDIR";
  37    Gnutmpdir : constant String := "GNUTMPDIR";
  38    No_Dir    : aliased String  := "";
  39    Temp_Dir  : String_Access   := No_Dir'Access;
  40
  41    ----------------------
  42    -- Create_Temp_File --
  43    ----------------------
  44
  45    procedure Create_Temp_File
  46      (FD   : out File_Descriptor;
  47       Name : out Path_Name_Type)
  48    is
  49       File_Name : String_Access;
  50       Current_Dir : constant String := Get_Current_Dir;
  51
  52       function Directory return String;
  53       --  Returns Temp_Dir.all if not empty, else return current directory
  54
  55       ---------------
  56       -- Directory --
  57       ---------------
  58
  59       function Directory return String is
  60       begin
  61          if Temp_Dir'Length /= 0 then
  62             return Temp_Dir.all;
  63
  64          else
  65             return Current_Dir;
  66          end if;
  67       end Directory;
  68
  69    --  Start of processing Tempdir
  70
  71    begin
  72       if Temp_Dir'Length /= 0 then
  73
  74          --  In verbose mode, display once the value of TMPDIR, so that
  75          --  if temp files cannot be created, it is easier to understand
  76          --  where temp files are supposed to be created.
  77
  78          if Verbose_Mode and then Tmpdir_Needs_To_Be_Displayed then
  79             Write_Str ("TMPDIR = """);
  80             Write_Str (Temp_Dir.all);
  81             Write_Line ("""");
  82             Tmpdir_Needs_To_Be_Displayed := False;
  83          end if;
  84
  85          --  Change directory to TMPDIR before creating the temp file,
  86          --  then change back immediately to the previous directory.
  87
  88          Change_Dir (Temp_Dir.all);
  89          Create_Temp_File (FD, File_Name);
  90          Change_Dir (Current_Dir);
  91
  92       else
  93          Create_Temp_File (FD, File_Name);
  94       end if;
  95
  96       if FD = Invalid_FD then
  97          Write_Line ("could not create temporary file in " & Directory);
  98          Name := No_Path;
  99
 100       else
 101          declare
 102             Path_Name : constant String :=
 103                           Normalize_Pathname
 104                             (Directory & Directory_Separator & File_Name.all);
 105
 106          begin
 107             Name_Len := Path_Name'Length;
 108             Name_Buffer (1 .. Name_Len) := Path_Name;
 109             Name := Name_Find;
 110             Free (File_Name);
 111          end;
 112       end if;
 113    end Create_Temp_File;
 114
 115 --  Start of elaboration for package Tempdir
 116
 117 begin
 118    declare
 119       Dir : String_Access;
 120
 121    begin
 122       --  On VMS, if GNUTMPDIR is defined, use it
 123
 124       if OpenVMS then
 125          Dir := Getenv (Gnutmpdir);
 126
 127          --  Otherwise, if GNUTMPDIR is not defined, try TMPDIR
 128
 129          if Dir'Length = 0 then
 130             Dir := Getenv (Tmpdir);
 131          end if;
 132
 133       else
 134          Dir := Getenv (Tmpdir);
 135       end if;
 136
 137       if Dir'Length > 0 and then
 138         Is_Absolute_Path (Dir.all) and then
 139         Is_Directory (Dir.all)
 140       then
 141          Temp_Dir := new String'(Normalize_Pathname (Dir.all));
 142       end if;
 143
 144       Free (Dir);
 145    end;
 146 end Tempdir;