On Wed, Oct 31, 2007 at 03:09:36PM +0000, Daniel Bye wrote: > On Wed, Oct 31, 2007 at 03:23:57PM +0100, Michael Grant wrote: > > > Yeah, I misread your problem. Are you saying that you want to su to root, > > > but still have some variables set as they were on the account you sued > > > from? > > > So you have a user named Michael, say, and you su to root, but when you > > > ssh > > > you want Michael's .ssh to be the effective one? > > > > Well sort of. When I su, $HOME is set to my homedir and $USER set to > > mgrant. This is fine. However, ssh (when sued) doesn't read > > $HOME/.ssh, it reads /root/.ssh. And it's not defaulting to logging > > into the remote machine as $USER, it tries to log in as root. It does > > this because it's hardwired in the code more or less as follows (I've > > extracted the relevant code from ssh.c): > > > > original_real_uid = getuid(); > > pw = getpwuid(original_real_uid); > > sprintf(buf, "%s/%s", pw->pw_dir, "ssh-config"); > > read_config_file(buf); > > options.user = strdup(pw->pw_name); > > > > Like I said, it seems like a bug to me. Personally I would have done > > a getenv("HOME") and getenv("USER") myself instead of depending on the > > userid. Probably they had good reason for doing it the way they did > > it. > > Probably to do with the fact that both $HOME and $USER can be set by the > user to any arbitrary value: > > [EMAIL PROTECTED]:~] --->$ echo $USER $HOME > daniel /home/daniel > [EMAIL PROTECTED]:~] --->$ USER=root > [EMAIL PROTECTED]:~] --->$ HOME=/root > [EMAIL PROTECTED]:/home/daniel] --->$ echo $USER $HOME > root /root > [EMAIL PROTECTED]:/home/daniel] --->$ cd > [EMAIL PROTECTED]:~] --->$ pwd > /root > > Not so good for security! > > Dan But the same effect can be achieved by specifying the identity file:
ssh -i /root/.ssh/id_dsa So this file still needs appropriate permissions to prevent misuse by other users. I'm pretty curious to know why the developers chose this path. If it's not actually a bug, but a security concern, then it would be a good learning experience for me! Erik _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"