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host_operations.adb
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------------------------------------------------------------------------------
-- --
-- Ada User Repository Annex (AURA) --
-- Reference Implementation --
-- --
-- ------------------------------------------------------------------------ --
-- --
-- Copyright (C) 2020, ANNEXI-STRAYLINE Trans-Human Ltd. --
-- All rights reserved. --
-- --
-- Original Contributors: --
-- * Richard Wai (ANNEXI-STRAYLINE) --
-- --
-- Redistribution and use in source and binary forms, with or without --
-- modification, are permitted provided that the following conditions are --
-- met: --
-- --
-- * Redistributions of source code must retain the above copyright --
-- notice, this list of conditions and the following disclaimer. --
-- --
-- * Redistributions in binary form must reproduce the above copyright --
-- notice, this list of conditions and the following disclaimer in --
-- the documentation and/or other materials provided with the --
-- distribution. --
-- --
-- * Neither the name of the copyright holder nor the names of its --
-- contributors may be used to endorse or promote products derived --
-- from this software without specific prior written permission. --
-- --
-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS --
-- "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT --
-- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A --
-- PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT --
-- OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, --
-- SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT --
-- LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, --
-- DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY --
-- THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT --
-- (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE --
-- OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. --
-- --
------------------------------------------------------------------------------
with Interfaces.C;
package body Host_Operations is
-------------------
-- Symbolic_Link --
-------------------
procedure Symbolic_Link (Target_Path, Source_Path: String) is
use Interfaces.C;
pragma Linker_Options ("-lc");
pragma Linker_Options ("host_operations-chmod_meta.o");
function Symlink_Syscall (name1, name2: in char_array) return int with
Import => True, Convention => C, External_Name => "symlink";
-- Imported directly from libc
Ret_Val: int;
begin
Ret_Val := Symlink_Syscall (name1 => To_C (Target_Path),
name2 => To_C (Source_Path));
if Ret_Val /= 0 then
raise Host_Operation_Failed with
"symlink System Call Failed with errno =" & int'Image (Ret_Val);
end if;
end Symbolic_Link;
-------------------
-- Set_Read_Only --
-------------------
procedure Set_Read_Only (Target_Path: String) is
use Interfaces.C;
function Chmod_Meta (path: in char_array) return int with
Import => True,
Convention => C,
External_Name => "__host_operations_chmod_meta";
-- This is imported from a separate binding since the type "mode_t",
-- is not standardized, nor are the values of the standard macro values
Ret_Val: int;
begin
Ret_Val := Chmod_Meta (To_C (Target_Path));
if Ret_Val /= 0 then
raise Host_Operation_Failed with
"stat/chmod System Call Failed with errno =" & int'Image (Ret_Val);
end if;
end Set_Read_Only;
end Host_Operations;