Hi, 05.03.2024 22:38:59 Edouard Klein <e...@rdklein.fr>:
> Hi, > > Thank you for your answer. > > > sirjofri <sirjofri+ml-9f...@sirjofri.de> writes: > >> Hello, >> >> I don't use /rc/bin/service anymore, but I use /cfg/machinename/service >> instead. My contents are copies of what's in /rc/bin/service or my own >> scripts: > > I assume that you then bind-mount /cfg/machinename/service to that > machine's /rc/bin/service ? Nope, because bind would only change my own namespace (or I have to bind it becore aux/listen starts). In fact, it's much easier. I don't know if it's a 9front feature or if it's also in plan 9, but if there is a /cfg/$sysname/service directory it will use that instead of /rc/bin/service (see the cpurc file, https://git.9front.org/plan9front/plan9front/36478171be59721dcc5252043fe2955cb37fc9b3/rc/bin/cpurc/f.html ). If you think about how plan 9 should run on a network, imagine a single fs with many cpu servers all using the same fs. All the configuration is on the fs, and the service directories are in the /cfg/machinename/service. The cpu servers will run their individual configuration automatically using that mechanism. It just makes sense. >> >> tcp80 - web server >> tcp443 - web server but wrapped in tls >> ... >> >> I have some cifd running, some irc server that translates to grid chat, my >> mail >> server (smtp and imap4), and fingerd, the files follow the usual scheme >> tcpXXX. >> I probably missed one service or the other, but aux/listen is simple enough >> to >> set up custom servers with arbitrary functionality. >> > > Would you mind sharing your fingerd and irc server ? For finger my plan > is to turn this one: > https://github.com/michael-lazar/finger2020/blob/master/finger2020 into > a multi-user version, but if there already is one I won't bother. Sure, here it is: https://shithub.us/sirjofri/fingerd/HEAD/info.html Note that I got some notice of potential .. path issues and I'm not sure if I fixed that, but just in case, you might want to fix that (and maybe send me a patch). Fix could be as easy as a newns or what it is in C. >> If you have exact questions about aux/listen functionality or you don't >> understand something, just ask :) >> > > - I noticed some tcpXXX files use exec for their last line, and some > don't. Is there a reason ? My understanding is that exec saves one call > to fork per connection, and thus it would be best if it was always used. There might be some difference, maybe with log redirectors or something, but I don't know about that. I guess someone else can tell us more about this (and the following topic, which is very similar) > - I noticed Inferno makes great use of servers that speak 9P on their > stdstream, with its > mount {some-program} /mnt/toto > These programs are trivial to expose thanks to listen: > listen -v 'tcp!*!toto' {some-program&} > On Plan9, I ran into rc's cmd <[0=1] | echo 0 > /srv/name, then mount > /srv/name /n/toto. > - Is there a inferno-like shorthand for Plan 9 ? > - Why the "echo 0" ? (I'm not familiar with rc). > >> Btw it's quite common to "deactivate" services by renaming the files to have >> a >> leading "!". In general, everything that follows the naming scheme >> <protocol><port> and is executable will work. >> > why not just chmod -x them ? In a multiuser system, users may not have > the right to rename them. I think that _would_ work, but I think it's about readability in this case. I can just lc in that directory and immediately see what's relevant and what not. With executable flag I have to run ls -l to see what's executable, and it's also harder to parse it (sorting and filtering). A simple ! is easier to read, and also probably more stable in case of copying files via different filesystem types (like, copying the file to fat32 and back, or even having a filesystem without executable flags, which often results in all files bein executable). sirjofri ------------------------------------------ 9fans: 9fans Permalink: https://9fans.topicbox.com/groups/9fans/Tf73851503467346f-M1b1379582bb9751cff6ba2ce Delivery options: https://9fans.topicbox.com/groups/9fans/subscription
