Re: don't just seek to the next line if the script has been edited

[Linda Walsh]

jidanni@jidanni.org wrote:

> All I know is there I am in emacs seeing things in the output of a
> running bash script that I want to tweak and get busy tweaking and saving
> changes before the script finishes, thinking that all this stuff will be
> effective on the next run of it, when lo and behold now it begins
> executing random bytes... Yes one can say that these are not C programs
----
If they were C programs, and you were to edit binary in place, while it was
executing, using memory-mapped I/O, the machine might very well start executing
garbage and your C program would dump core or similar.

Chances are, your text editor is writing to the same file as it read from
rather than writing your program to a new file and moving the old off to a
backup.

If your text editor always stored your new input in a new file you wouldn't
see this behavior.  Emacs is supposed to be configurable .. I know vim will
do different things based on if the file has hard links or not (it will try
not to break them, otherwise it's a new file each time)...