namespace lyx {
namespace support {
-string const getEnv(string const & envname)
+
+bool hasEnv(string const & name)
+{
+ return getenv(name.c_str());
+}
+
+
+string const getEnv(string const & name)
{
// f.ex. what about error checking?
- char const * const ch = getenv(envname.c_str());
+ char const * const ch = getenv(name.c_str());
return ch ? to_utf8(from_local8bit(ch)) : string();
}
string const encoded = to_local8bit(from_utf8(value));
#if defined (HAVE_SETENV)
- return ::setenv(name.c_str(), encoded.c_str(), true);
+ return ::setenv(name.c_str(), encoded.c_str(), 1) == 0;
#elif defined (HAVE_PUTENV)
+ // According to http://pubs.opengroup.org/onlinepubs/9699919799/functions/putenv.html
+ // the argument of putenv() needs to be static, because changing its
+ // value will change the environment. Therefore we need a different static
+ // storage for each variable.
+ // FIXME THREAD
static map<string, string> varmap;
varmap[name] = name + '=' + encoded;
return ::putenv(const_cast<char*>(varmap[name].c_str())) == 0;
setEnvPath(name, env_var);
}
+
+bool unsetEnv(string const & name)
+{
+#if defined(HAVE_UNSETENV)
+ // FIXME: does it leak?
+ return ::unsetenv(name.c_str()) == 0;
+#elif defined(HAVE_PUTENV)
+ // This is OK with MSVC and MinGW at least.
+ // The argument of putenv() does not need to be a static variable in this
+ // case, since the variable is removed from the environment.
+ return ::putenv(const_cast<char*>((name + "=").c_str())) == 0;
+#else
+#error No environment-unsetting function has been defined.
+#endif
+}
+
+
} // namespace support
} // namespace lyx