e292984cd3
o In practice: the comment indicates that all but umask and environmental variables of the users login class are applied when su occurs, unless -m is used to specify a class. This was incorrect; in practice, the uid, gids, resources, and priority were set, and then resources and priority were selectively removed. This meant that some aspects of the user context were not set, including handling of login events (wtmp, utmp), as well as the path specified in login.conf. o I changed it so that the behavior is the same, but instead, LOGIN_SETALL is used, and appropriate flags are removed, including the LOGIN_SETLOGIN and LOGIN_SETPATH entries that were implicitly not present before. I also updated the comment to reflect reality, selecting reality as the "correct" behavior. o This has the practical benefit that as new LOGIN_SET* flags are introduced, they are supported by su unless specifically disabled. For example, of a LOGIN_SETLABEL flag is introduced to support MAC labels determined by the user's login class, then su no longer has to be modified. o It might be desirable to have su use LOGIN_SETPATH depending on its command line parameters, as it might or might not be considered part of the "environment". Obtained from: TrustedBSD Project |
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