fix conceptual error/thinko in EnvironmentalProtectionAgency when using unsetenv() while iterating over char** environ
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@ -131,19 +131,26 @@ EnvironmentalProtectionAgency::restore () const
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void
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EnvironmentalProtectionAgency::clear () const
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{
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char** the_environ = environ;
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/* Copy the environment before using (g_)unsetenv() because on some
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platforms (maybe all?) this directly modifies the environ array,
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cause complications for iterating through it.
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*/
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for (size_t i = 0; the_environ[i]; ++i) {
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string estring = the_environ[i];
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string::size_type equal = estring.find_first_of ('=');
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vector<string> ecopy;
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for (size_t i = 0; environ[i]; ++i) {
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ecopy.push_back (environ[i]);
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}
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for (vector<string>::const_iterator e = ecopy.begin(); e != ecopy.end(); ++e) {
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string::size_type equal = (*e).find_first_of ('=');
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if (equal == string::npos) {
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/* say what? an environ value without = ? */
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continue;
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}
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string before = estring.substr (0, equal);
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g_unsetenv(before.c_str());
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string var_name = (*e).substr (0, equal);
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g_unsetenv(var_name.c_str());
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}
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}
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