external/bsd/atf/dist/tools/env.cpp

   1 //
   2 // Automated Testing Framework (atf)
   3 //
   4 // Copyright (c) 2007 The NetBSD Foundation, Inc.
   5 // All rights reserved.
   6 //
   7 // Redistribution and use in source and binary forms, with or without
   8 // modification, are permitted provided that the following conditions
   9 // are met:
  10 // 1. Redistributions of source code must retain the above copyright
  11 //    notice, this list of conditions and the following disclaimer.
  12 // 2. Redistributions in binary form must reproduce the above copyright
  13 //    notice, this list of conditions and the following disclaimer in the
  14 //    documentation and/or other materials provided with the distribution.
  15 //
  16 // THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND
  17 // CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
  18 // INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  19 // MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20 // IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY
  21 // DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22 // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
  23 // GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  24 // INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
  25 // IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  26 // OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
  27 // IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28 //
  29
  30 extern "C" {
  31 #include <errno.h>
  32 #include <stdlib.h>
  33 #include <string.h>
  34 }
  35
  36 #include <cassert>
  37
  38 #include "env.hpp"
  39 #include "exceptions.hpp"
  40
  41 namespace impl = tools::env;
  42 #define IMPL_NAME "tools::env"
  43
  44 // ------------------------------------------------------------------------
  45 // Free functions.
  46 // ------------------------------------------------------------------------
  47
  48 std::string
  49 impl::get(const std::string& name)
  50 {
  51     const char* val = getenv(name.c_str());
  52     assert(val != NULL);
  53     return val;
  54 }
  55
  56 bool
  57 impl::has(const std::string& name)
  58 {
  59     return getenv(name.c_str()) != NULL;
  60 }
  61
  62 void
  63 impl::set(const std::string& name, const std::string& val)
  64 {
  65     if (setenv(name.c_str(), val.c_str(), 1) == -1)
  66         throw tools::system_error(IMPL_NAME "::set",
  67                                 "Cannot set environment variable '" + name +
  68                                 "' to '" + val + "'",
  69                                 errno);
  70 }
  71
  72 void
  73 impl::unset(const std::string& name)
  74 {
  75     unsetenv(name.c_str());
  76 }