![]() ![]() If you were to kill vim in such a way that it couldn't handle the signal gracefully you would probably see the same problem.Ī solution for the vim case is avoid xargs and use instead: vim $(grep foo * -l) In your posted output from stty -a we can see "-echo", also confirming that this is the problem. Instead the ' grep' and ' xargs' commands have been using the standard input, normally occupied by the tty, for purposes of passing the file names from grep tto xargs. This is because vim isn't started normally from the shell. I also see a message "Vim: Warning: Input is not from a terminal" (It goes away when you reset). In the vim case, when I run your example I get the same behaviour you describe. I'd guess that that program isn't getting a chance to reset the terminal, or is simply failing to do so. I assume the interrupt is messing with the python software you are running. Since programs can fail to reset the terminal, the reset command was written to allow the user to recover. If they fail to do this properly the tty is left in the funny state you have discovered. ![]() Such programs are supposed to reset any modes they change on the virtual tty they are using before they quit, either by entering a quit editor command or by taking a signal (from Ctrl+C) for example. All this applies to real tty terminals on a computer's serial lines, or the virtual terminals at Alt+Ctrl+F4, or the really virtual terminals you get when you run something like gnome-terminal under a GUI. ![]() In particular, editor's like vim turn off various "echo settings". Instead they ask the kernel for a "raw" mode. They don't want special characters to do special things, either. For this reason they signal the kernel with an IOCTL call against the tty (terminal) device that they don't want this behaviour. There's other special handling, too, for erase characters, Ctrl+R, Ctrl+Z, and so on.Ĭertain programs, (editors in particular) that run from a command line don't need or want this. When running a shell or most programs in a shell anything you type is echo'd back to the user's terminal by the kernel's tty subsystem. Gruber's request gave the following output (whitespace edited for readability) speed 0 baud Searching for this problem is itself problematic because the description is kind of vague and has no hard search-terms for it.Ĭommand as per John S. My guess is that both problems have an underlying reason, but I'm kind of stumped on how or what that reason is. But when I exit Vim my shell stops showing the characters I type into it. This works like a charm (although not as fast as I'd hoped). I use grep to find files that have a certain pattern and then I want to open all the files that result from the grep. The second way this happens is when I give a command like this: $ grep foo * -l | xargs vim
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