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) 2003-2021, 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
26with GNAT.Directory_Operations; use GNAT.Directory_Operations;
27
28with Opt;      use Opt;
29with Output;   use Output;
30
31package 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
139begin
140   Use_Temp_Dir (Status => True);
141end Tempdir;
142