On Sat, Jan 14, 2017 at 2:50 PM, Rob Landley <r...@landley.net> wrote: > On 01/14/2017 03:19 PM, enh wrote: >> Our device bringup folks wanted a simple serial console, both on the >> host and on the device. This is certainly enough to replace what I've >> been using personally on the host. > > I've used "netcat -f /dev/ttyS0" but you need stty to set it up and it's > not properly handling ctrl-C and its guts need to be moved out to > lib/net.c and...
i've almost implemented stty a couple of times now. the input side seems like a pain (though i assume that existing implementations just ignore the various conflicts and just do what you said in order), and the output side is annoyingly under-specified (what to show without -a, what -g should look like), and so far it's always turned out that i don't actually need it anyway. > Sigh. I need time to work through my todo list. > >> I'd never heard of "microcom" until I asked the internets what busybox >> users use, so I don't care what we call this or what the options are >> called. (But would like to decide before it gets ossified in a million >> factory test scripts and the like!) > > The name microcom is fine. (It's a pun on "minicom" which is a common > external version.) I was meaning to add that as an alias to netcat -f > once I got that properly cleaned up and stty implemented. > > (Honestly the hard part of microcom, netcat, stty, tcpserv, and so on is > making them all share infrastructure sanely. They all want _slightly_ > different semntics...) > >> The tool that this replaces for me defaulted to /dev/ttyUSB0, but since >> I don't know whether that default would be useful for most other people >> too, I left that out. Command-line history will solve my transition >> problem. > > Indeed. > > I'll merge this but I'll also try to get it cleaned up and promoted on > the flight to linuxconf.au so you're not using _another_ command out of > pending. > > Thanks, > > Rob > > P.S. Hmmm... in lib/ my set_terminal() isn't setting speed, my > tty_sigreset() is only resetting stdin not a second fd, note that tty_sigreset (despite the name) is unrelated. that's all about resetting VT100-style state. the code in microcom is about resetting line discipline-style state. similarly, set_terminal has curses-style interests that don't make sense for microcom (but are probably useful for a wider range of toys). > and my > pollinate() uses "shutdown()" so if you go: > > echo GET / | netcat old-http-1.0-server 80 > > You get output. But in _this_ case, stdin closing probably means you > want the program to exit because serial console doesn't do the > unidirectional close thing so you can't tell when/if the other end hung > up... Slightly Different Semantics. ALMOST the same enough to share > code. Hmmm... at the same time, these functions are short enough that abstracting out to cover both seems like it just makes things worse. keeping the high-level "curses" stuff distinct from the low-level "serial line" stuff seems reasonable until/unless we have more of the latter, and even then it seems likely that the two groups would stay distinct. > _______________________________________________ > Toybox mailing list > Toybox@lists.landley.net > http://lists.landley.net/listinfo.cgi/toybox-landley.net -- Elliott Hughes - http://who/enh - http://jessies.org/~enh/ Android native code/tools questions? Mail me/drop by/add me as a reviewer. _______________________________________________ Toybox mailing list Toybox@lists.landley.net http://lists.landley.net/listinfo.cgi/toybox-landley.net
