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- ps2: Ctrl+C and Ctrl+D are now KeyEvents (ctrl modifier + c/d map);
other Ctrl+key combos are swallowed
- shell read_line: ^C clears the line and echoes '^C' (bash-style),
^D on an empty line echoes '^D' and shuts down (EOF), ^D with text
on the line is ignored
- cat/hexdump stream incrementally (was: build whole string then print)
and check for ^C between chunks, so a running dump can be aborted
- verified in QEMU: line cancel, standalone interrupt, ^C aborts an
infinite 'cat /dev/zero' stream, ^D powers off
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- fs.rs: node-table VFS (root /dev /tmp /etc). Regular files are
in-memory ramfs; char devices regenerate content on every read so
'cat /dev/rtc' shows the live time. Nodes are stable handles with
tombstone removal; . and .. path resolution.
- /dev devices: mem (raw physical RAM, offset = address), rtc, pci,
version, meminfo, null, zero, console (write prints to screen+serial),
serial. /etc/motd static file.
- shell: ls, cat, hexdump (hexdump -C style), mkdir, touch, rm; echo
gains '>' overwrite and '>>' append redirection (append bug fixed:
first '>' in '>>' was parsed as overwrite)
- boot: fs init + self-test (create/read/write/remove) before the shell
- QEMU verified: file lifecycle, redirection, console/null writes,
mkdir/touch/rm, hexdump /dev/mem and /tmp/x byte-exact
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