86 lines
1.9 KiB
Go
86 lines
1.9 KiB
Go
package main
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import (
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"os/exec"
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"strings"
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udev "github.com/jochenvg/go-udev"
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"github.com/rs/zerolog/log"
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config "novit.tech/direktil/pkg/bootstrapconfig"
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)
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func setupNetworks(cfg *config.Config) {
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if len(cfg.Networks) == 0 {
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log.Info().Msg("no networks configured.")
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return
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}
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type Iface struct {
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Name string
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AliasOf string
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}
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ifaces := make([]NameAliases, 0)
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{
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enum := new(udev.Udev).NewEnumerate()
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enum.AddMatchSubsystem("net")
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devs, err := enum.Devices()
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if err != nil {
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fatal("udev enumeration failed")
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}
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for _, dev := range devs {
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iface := nameAliases(dev.Sysname(),
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dev.PropertyValue("ID_NET_NAME"),
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dev.PropertyValue("ID_NET_NAME_PATH"),
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dev.PropertyValue("ID_NET_NAME_MAC"),
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)
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log.Info().Str("name", iface.Name).Any("aliases", iface.Aliases).Msg("found network device")
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ifaces = append(ifaces, iface)
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}
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}
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assigned := map[string]bool{}
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for _, network := range cfg.Networks {
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log := log.With().Str("network", network.Name).Logger()
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log.Info().Msg("setting up network")
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unassigned := filter(ifaces, func(iface NameAliases) bool {
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return !assigned[iface.Name]
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})
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// assign envvars
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envvars := make([]string, 0, 1+len(network.Interfaces))
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envvars = append(envvars, "PATH=/bin:/sbin:/usr/bin:/usr/sbin")
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for _, match := range network.Interfaces {
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envvar := new(strings.Builder)
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envvar.WriteString(match.Var)
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envvar.WriteByte('=')
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for i, m := range regexpSelectN(match.N, match.Regexps, unassigned) {
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assigned[m] = true
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if i != 0 {
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envvar.WriteByte(' ')
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}
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envvar.WriteString(m)
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}
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envvars = append(envvars, envvar.String())
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}
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log.Info().Strs("env", envvars).Msg("running script")
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cmd := exec.Command("/bin/sh", "-c", network.Script)
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cmd.Env = envvars
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cmd.Stdout = stdout
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cmd.Stderr = stderr
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if err := cmd.Run(); err != nil {
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fatal("failed to setup network: ", err)
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}
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}
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}
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