mirror of https://github.com/berriedale/arun
106 lines
3.5 KiB
Ada
106 lines
3.5 KiB
Ada
------------------------------------------------------------------------------
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--
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-- Copyright (C) 2017 R. Tyler Croy <tyler@linux.com>
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--
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-- This program is free software; you can redistribute it and/or
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-- modify it under the terms of the GNU General Public License
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-- as published by the Free Software Foundation; either version 2
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-- of the License, or (at your option) any later version.
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--
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-- This program is distributed in the hope that it will be useful,
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-- but WITHOUT ANY WARRANTY; without even the implied warranty of
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-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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-- GNU General Public License for more details.
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--
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-- You should have received a copy of the GNU General Public License
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-- along with this program; if not, write to the Free Software
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-- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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------------------------------------------------------------------------------
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with Ada.Text_IO; use Ada.Text_IO;
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with Ada.Command_Line.Environment;
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with Ada.Environment_Variables;
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with GNAT.OS_Lib;
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with GNAT.String_Split;
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with Interfaces.C;
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with Interfaces.C.Strings;
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with System;
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package body Arun.Launcher is
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function Find_Full_Path (Snippet : in String) return String is
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use GNAT.String_Split;
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PATH : constant String := Ada.Environment_Variables.Value ("PATH");
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Separator : constant String := ":";
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Path_Components : Slice_Set;
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begin
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Create (S => Path_Components,
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From => PATH,
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Separators => Separator,
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Mode => Single);
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for Index in 1 .. Slice_Count (Path_Components) loop
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Put_Line ("Looking for an executable in " & Slice (S => Path_Components,
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Index => Index));
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declare
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Path_Component : constant String := Slice (S => Path_Components,
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Index => Index);
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Computed_Location : constant String := Path_Component & "/" & Snippet;
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begin
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if GNAT.OS_Lib.Is_Executable_File (Computed_Location) then
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Put_Line ("Found executable at " & Computed_Location);
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return Computed_Location;
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end if;
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end;
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end loop;
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return "";
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end Find_Full_Path;
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procedure Execute (Executable_Path : in String) is
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use GNAT.OS_Lib;
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use Interfaces.C;
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use Interfaces.C.Strings;
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use Ada.Command_Line.Environment;
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function Exec_And_Replace (Filename : in Char_Array;
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Arguments : in Chars_Ptr_Array) return Integer
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with Import,
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Convention => C,
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Link_Name => "execv";
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procedure Print_Errno (Message : in String)
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with Import,
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Convention => C,
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Link_Name => "perror";
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Default_Args : Chars_Ptr_Array (1 .. 2) := (1 => New_String (Executable_Path), 2 => Null_Ptr);
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Status : Integer;
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begin
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Put_Line ("Spawning " & Executable_Path);
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Status := Exec_And_Replace (Filename => To_C (Item => Executable_Path,
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Append_Nul => True),
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Arguments => Default_Args);
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-- If the Exec_And_Replace function returns then something has gone wrong
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Put_Line ("Spawned " & Executable_Path & " with " & Status'Img);
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if Status /= 0 then
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Print_Errno ("Something went wrong");
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end if;
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end Execute;
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end Arun.Launcher;
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