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Colin Walters authored
This is a further security measure for the case of Linux/glibc when we're linked into a binary that's using filesystem capabilities or SELinux domain transitions (i.e. not plain old setuid). In this case, _dbus_getenv () will return NULL because it will use __secure_getenv(), which handles those via AT_SECURE. https://bugs.freedesktop.org/show_bug.cgi?id=52202
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