On 10/31/18 10:54 AM, Stuart Henderson wrote:
On 2018-10-31, Tinker <t1...@protonmail.ch> wrote:
Hi,
When in "cat" or "dd if=/dev/zero of=/dev/zero" or "gzip < /dev/zero >
/dev/zero", if I press ctrl+4, the program coredumps.
Doing it in ksh or sh has no effect though.
This is in OpenBSD 6.4 AMD64 from Putty on Windows.
The console interaction looks like this:
$ cat
^\Quit (core dumped)
$
Is ctrl+4 a universal SIGQUIT+coredump shortcut?
Where are the other shortcuts apart from ctrl+C, ctrl+Z, ctrl+D,
documented?
Tinker
No idea how ^4 is mapped to ^\, but for some reason it is, and this
the default for "quit", see "stty -a".
This is a useful sequence to interrupt boot if you weren't quick enough
to "boot -s" to enter single-user mode.
You can also find more details in the termios(4) man page, specifically the Special
Characters section.
- Aner
