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) 2003-2023, 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 Opt;      use Opt;
  29 with Output;   use Output;
  30
  31 package body Tempdir is
  32
  33    Tmpdir_Needs_To_Be_Displayed : Boolean := True;
  34
  35    Tmpdir   : constant String := "TMPDIR";
  36    Temp_Dir : String_Access   := new String'("");
  37
  38    ----------------------
  39    -- Create_Temp_File --
  40    ----------------------
  41
  42    procedure Create_Temp_File
  43      (FD   : out File_Descriptor;
  44       Name : out Path_Name_Type)
  45    is
  46       File_Name   : String_Access;
  47       Current_Dir : constant String := Get_Current_Dir;
  48
  49       function Directory return String;
  50       --  Returns Temp_Dir.all if not empty, else return current directory
  51
  52       ---------------
  53       -- Directory --
  54       ---------------
  55
  56       function Directory return String is
  57       begin
  58          if Temp_Dir'Length /= 0 then
  59             return Temp_Dir.all;
  60          else
  61             return Current_Dir;
  62          end if;
  63       end Directory;
  64
  65    --  Start of processing for Create_Temp_File
  66
  67    begin
  68       if Temp_Dir'Length /= 0 then
  69
  70          --  In verbose mode, display once the value of TMPDIR, so that
  71          --  if temp files cannot be created, it is easier to understand
  72          --  where temp files are supposed to be created.
  73
  74          if Verbose_Mode and then Tmpdir_Needs_To_Be_Displayed then
  75             Write_Str ("TMPDIR = """);
  76             Write_Str (Temp_Dir.all);
  77             Write_Line ("""");
  78             Tmpdir_Needs_To_Be_Displayed := False;
  79          end if;
  80
  81          --  Change directory to TMPDIR before creating the temp file,
  82          --  then change back immediately to the previous directory.
  83
  84          Change_Dir (Temp_Dir.all);
  85          Create_Temp_File (FD, File_Name);
  86          Change_Dir (Current_Dir);
  87
  88       else
  89          Create_Temp_File (FD, File_Name);
  90       end if;
  91
  92       if FD = Invalid_FD then
  93          Write_Line ("could not create temporary file in " & Directory);
  94          Name := No_Path;
  95
  96       else
  97          declare
  98             Path_Name : constant String :=
  99                           Normalize_Pathname
 100                             (Directory & Directory_Separator & File_Name.all);
 101          begin
 102             Name_Len := Path_Name'Length;
 103             Name_Buffer (1 .. Name_Len) := Path_Name;
 104             Name := Name_Find;
 105             Free (File_Name);
 106          end;
 107       end if;
 108    end Create_Temp_File;
 109
 110    ------------------
 111    -- Use_Temp_Dir --
 112    ------------------
 113
 114    procedure Use_Temp_Dir (Status : Boolean) is
 115       Dir : String_Access;
 116
 117    begin
 118       if Status then
 119          Dir := Getenv (Tmpdir);
 120       end if;
 121
 122       Free (Temp_Dir);
 123
 124       if Dir /= null
 125         and then Dir'Length > 0
 126         and then Is_Absolute_Path (Dir.all)
 127         and then Is_Directory (Dir.all)
 128       then
 129          Temp_Dir := new String'(Normalize_Pathname (Dir.all));
 130       else
 131          Temp_Dir := new String'("");
 132       end if;
 133
 134       Free (Dir);
 135    end Use_Temp_Dir;
 136
 137 --  Start of elaboration for package Tempdir
 138
 139 begin
 140    Use_Temp_Dir (Status => True);
 141 end Tempdir;