bwbox/lib/sandbox.nim

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2021-05-18 22:10:35 +02:00
import os
import json
import bwrap
import config
import options
const CONFIG_LOCATION = "config.json"
proc homePath(p: string): string =
joinPath(getHomeDir(), p)
proc checkRelativePath(p: string): string =
if p[0] == '/':
return p
homePath(p)
proc applyConfig(call: var BwrapCall, config: Config) =
for mount in config.mount.get(@[]):
call.addMount("--bind", checkRelativePath(mount))
for mount in config.romount.get(@[]):
call.addMount("--ro-bind", checkRelativePath(mount))
for symlink in config.symlinks.get(@[]):
call.addArg("--symlink", symlink.src, symlink.dst)
proc loadConfig(path: string): Config =
return readFile(path).parseJson().to(Config)
proc sandboxExec*(name: string, command: string) =
let sandboxPath = homePath(joinPath(".sandboxes", name))
let sandboxFiles = joinPath(sandboxPath, "files")
let sandboxInfo = joinPath(sandboxPath, "info")
createDir(sandboxFiles)
var call = BwrapCall()
call
.addArg("--bind", sandboxFiles, getHomeDir())
.addMount("--dev-bind", "/dev")
.addArg("--dir", "/tmp")
.addArg("--proc", "/proc")
.addArg("--unshare-all")
.addArg("--share-net")
.addArg("--die-with-parent")
.addArg("--hostname", name)
.addArg("--chdir", getHomeDir())
.applyConfig(loadConfig(CONFIG_LOCATION))
let configPath = sandboxPath.joinPath("config.json")
echo configPath
if fileExists(configPath):
call.applyConfig(loadConfig(configPath))
call.addArg(command).exec()