Support capturing stdout #82

Activity

1. alexp-sssup commented on Jun 23, 2023

   

   alexp-sssup

   on Jun 23, 2023

   Member

   More actions

   There is currently no APIs to either read files from the disk or to capture stdout. As things stand today your best bet is to hook the console output.

   For such small questions I would like to encourage you to join our discord: https://discord.gg/yTNZgySKGa

   I'll keep this bug open as a feature request

   👍React with 👍1Reacted by Julian Hundeloh
2. alexp-sssup

   changed the title [-]Read file[/-] [+]Support capturing stdout[/+] on Jun 23, 2023
3. bates64

   added

   Type: feature requestNew feature or requestNew feature or request

   on Aug 4, 2023
4. bates64 commented on Aug 17, 2023

   

   bates64

   on Aug 17, 2023

   Contributor

   More actions

   For the time being, you can capture console output (i.e. both stdout and stderr) with the following snippet. This works by capturing all output into an array bufs whilst the command runs, and then clearing it when it finishes.

   const cx = await CheerpXApp.create(/* ... */);
   
   const decoder = new TextDecoder("utf-8");
   let bufs = [];
   const writeCharCode = cx.setCustomConsole(buf => bufs.push(buf), 60, 30);
   
   async function run(command, args, opts) {
     const code = await cx.run(command, args, opts);
     
     const output = bufs.map(buf => decoder.decode(buf)).join("");
     bufs = [];
     
     return { code, output };
   }
   
   // Run cat and capture its output
   const cat = await run("/bin/cat", ["/etc/hosts"], {
     env: ["HOME=/home/user", "TERM=xterm", "USER=user", "SHELL=/bin/bash", "EDITOR=vim", "LANG=en_US.UTF-8", "LC_ALL=C"],
     cwd: "/",
     uid: 1000,
     gid: 1000,
   });
   console.log("cat exited with code:", cat.code);
   console.log("cat output:", cat.output);

   🎉React with 🎉3Reacted by Kristofer Koishigawa, Олександр and ErikMarinho

   👀React with 👀3Reacted by Fabien Benetou, Олександр and ErikMarinho