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From: "M. A. Alves" <maa@liacc.up.pt>
Newsgroups: comp.lang.ada
Subject: Re: Unix Executables
Date: Tue, 10 Jul 2001 21:02:23 +0000 (GMT)
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Date: 2001-07-10T21:02:23+00:00

On 10 Jul 2001, Matt Raikes wrote:
> Is there a way to call a Unix executable(such as gzip) from within my code.

Many ways.  Function Posix.System, for example.

-----

package Posix is

  function System(Command: String) return Integer;

end Posix;

-----

with Interfaces.C; use Interfaces.C;
with Interfaces.C.Strings; use Interfaces.C.Strings;

package body Posix is

  function C_System(Command: chars_ptr) return int;
  pragma Import(C, C_System, "system");

  function System(Command: String) return Integer is
    C_Command : aliased char_array := To_C(Command);
  begin

return(Integer(C_System(To_Chars_Ptr(C_Command'Unrestricted_Access))));
  end System;

end Posix;

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