The username is read with the liner line editor, which puts the console
pty into raw mode (ICANON/ECHO cleared) and does not restore it. In raw
mode the pty line discipline never flushes a completed line into the
slave read buffer the way a shell's canonical read_line expects, so the
interactive shell (brush) never receives a typed command even though
getty forwards it to the pty master. Reset stdin to sane cooked settings
(ICANON|ECHO|ISIG, ICRNL, OPOST|ONLCR, VMIN=1/VTIME=0) via tcsetattr
before spawning the shell.
vasilito
1cce5020ad