* Maxim Nikulin <maniku...@gmail.com> [2020-11-11 20:17]: > 2020-11-11 Jean Louis wrote: > > * Maxim Nikulin [2020-11-10 19:31]: > > > 2020-11-10 Greg Minshall wrote: > > > > > > > > i would guess > > > > using 'cat -v' to read e-mail is 100% safe. even throwing in > > > > uudecode(1), or whatever is needed to decode base64, (and then piping > > > > through 'cat -v', of course ), it's probably still safe. > > > > > > Please, check that you have at least updated tmux before applying such > > > "safe" handler: https://www.openwall.com/lists/oss-security/2020/11/05/3 > > > The > > > news are too recent to not mention the link in such context. > > > > > > The sour story is that it is unsafe to feed non-trusted files directly to > > > terminal. A filter against control sequences is required. > > > > Is there anyway to disable control sequences? Than cat can be aliased. > > We were kidding. > > You do not need a terminal if you do not need control sequences. They plays > the role of interface to allow line (or full screen) editing that is why > control sequences is the essence of terminals. I suppose you would get tired > almost immediately having to type everything strictly sequential without > ability to remove even the last character. Some terminals allows to disable > particular features, e.g. setting of title in xterm. But there are still a > lot of rather basic capabilities.
I know what you mean. I did not express myself very specific. What I meant is to alias cat to something else that specifically turns off control sequences. Like alias cat='sequence off; cat' something like that Somebody already mentioned there is cat -v to show nonprinting characters with notation ^- and M- so that may be the solution and I may be wrong there. I am often using cat to view files and for some remote files I have to put attention.
