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16 lines
839 B
16 lines
839 B
- Modify the following environment variables: (listed in environ(7))
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* USER -> to target user
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* LOGNAME -> to target user
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* SHELL -> to the target user's SHELL
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* HOME -> to the target user's HOME
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- fork before exec, that is because processes might try to kill us or the
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command but since they may run under elevated privileges they will get
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permission denied error. If we remain the parent processes, unprivileged
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proceses can send signals to us and we will relay them to our children
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running at the same privilege as us. This is useful when:
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- The child command hangs and we want to cose it, kinda
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problematic but we could run kill with us as well
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- The parent shell dies and children need to be killed, then
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since one of their children (us) has higher privileges
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they can't kill us and we would end up as zombies
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