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|
package main
import (
"context"
"errors"
"os"
"path/filepath"
"strconv"
"syscall"
"time"
"hakurei.app/check"
"hakurei.app/fhs"
"hakurei.app/internal/kobject"
"hakurei.app/internal/uevent"
)
// mustMountSystem waits for and mounts a system device matching pattern.
func mustMountSystem(
ctx context.Context,
s *kobject.State,
pattern string,
) {
c, stop := context.WithTimeout(ctx, 30*time.Second)
defer stop()
for {
var matchErr error
var systemPath *check.Absolute
s.Range(c, func(o *kobject.Object, act uevent.KobjectAction) bool {
if (act != uevent.KOBJ_ADD && act != uevent.KOBJ_CHANGE) ||
o.Subsystem != "block" ||
o.Env["DEVTYPE"] != "disk" {
return true
}
if ok, err := filepath.Match(pattern, o.DevPath); err != nil {
matchErr = err
return false
} else if !ok {
return true
}
name, ok := o.Env["DEVNAME"]
if !ok {
return true
}
systemPath = fhs.AbsDev.Append(name)
return false
})
if c.Err() != nil {
fatal("devpath", strconv.Quote(pattern), "never appeared")
}
if matchErr != nil {
fatal("cannot match system devpath:", matchErr)
}
err := syscall.Mount(
systemPath.String(),
"/system/",
"squashfs",
0,
"threads=multi",
)
if err == nil {
break
}
if !errors.Is(err, os.ErrNotExist) {
fatal("cannot mount system:", err)
}
}
}
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