1 // ANNA - Anna is Not 'N' Anymore
3 // (c) Copyright 2005-2014 Eduardo Ramos Testillano & Francisco Ruiz Rayo
5 // https://bitbucket.org/testillano/anna
7 // Redistribution and use in source and binary forms, with or without
8 // modification, are permitted provided that the following conditions
11 // * Redistributions of source code must retain the above copyright
12 // notice, this list of conditions and the following disclaimer.
13 // * Redistributions in binary form must reproduce the above
14 // copyright notice, this list of conditions and the following disclaimer
15 // in the documentation and/or other materials provided with the
17 // * Neither the name of Google Inc. nor the names of its
18 // contributors may be used to endorse or promote products derived from
19 // this software without specific prior written permission.
21 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
24 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
25 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
27 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 // Authors: eduardo.ramos.testillano@gmail.com
34 // cisco.tierra@gmail.com
37 #include <anna/core/util/Environment.hpp>
39 #include <anna/config/defines.hpp>
40 #include <anna/core/tracing/Logger.hpp>
41 #include <anna/core/tracing/TraceMethod.hpp>
42 #include <anna/core/functions.hpp>
44 #include <stdlib.h> // getenv / setenv
54 void Environment::initialize(char **envp) throw() {
55 LOGMETHOD(TraceMethod tm("Environment", "initialize", ANNA_FILE_LOCATION));
61 std::string assignment, var, val;
64 std::size_t equalPos = assignment.find("=");
65 if (equalPos != string::npos) { // protection
66 var = assignment.substr(0, equalPos - 1);
67 val = assignment.substr(equalPos, assignment.size() - 1);
74 std::string Environment::getValue(const char* variableName, bool exceptionIfMissing) throw(RuntimeException) {
76 throw RuntimeException("Invalid NULL variable name!", ANNA_FILE_LOCATION);
78 std::string var = variableName;
80 return getValue(var, exceptionIfMissing);
83 std::string Environment::getValue(const std::string &variableName, bool exceptionIfMissing) throw(RuntimeException) {
84 std::string result = "";
86 std::map<std::string, std::string>::const_iterator it = a_vars.find(variableName);
88 if(it == a_vars.end()) {
89 char *current = getenv (variableName.c_str());
91 std::string msg = "The variable '";
93 msg += "' is not defined in the environment.";
94 LOGDEBUG(Logger::debug(msg, ANNA_FILE_LOCATION));
96 if(exceptionIfMissing) throw RuntimeException(msg, ANNA_FILE_LOCATION);
100 a_vars[variableName] = current;
112 void Environment::setVariable(const std::string &name, const std::string &value, bool overwrite) throw(RuntimeException) {
114 if (name == "") throw RuntimeException("Must provide non-empty variable name", ANNA_FILE_LOCATION);
116 if(setenv(name.c_str(), value.c_str(), overwrite ? 1:0) != 0) {
117 std::string msg = "Cannot set the environment variable '";
121 msg += "\"'. The errno is ";
122 msg += anna::functions::asString(errno);
124 throw RuntimeException(msg, ANNA_FILE_LOCATION);
129 a_vars[name] = value;
133 void Environment::unsetVariable(const std::string &name) throw(RuntimeException) {
135 if (name == "") throw RuntimeException("Must provide non-empty variable name", ANNA_FILE_LOCATION);
137 if(unsetenv(name.c_str()) != 0) {
138 std::string msg = "Cannot unset the environment variable named '";
140 msg += "'. The errno is ";
141 msg += anna::functions::asString(errno);
143 throw RuntimeException(msg, ANNA_FILE_LOCATION);
146 std::map<std::string, std::string>::iterator it = a_vars.find(name);
147 if(it != a_vars.end()) a_vars.erase(it);