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|
package sandbox
import (
"encoding/json"
"io/fs"
"log"
"os"
)
var (
assert = log.New(os.Stderr, "sandbox: ", 0)
printfFunc = assert.Printf
fatalfFunc = assert.Fatalf
)
func printf(format string, v ...any) { printfFunc(format, v...) }
func fatalf(format string, v ...any) { fatalfFunc(format, v...) }
func mustDecode(wantFile string, v any) {
if f, err := os.Open(wantFile); err != nil {
fatalf("cannot open %q: %v", wantFile, err)
} else if err = json.NewDecoder(f).Decode(v); err != nil {
fatalf("cannot decode %q: %v", wantFile, err)
} else if err = f.Close(); err != nil {
fatalf("cannot close %q: %v", wantFile, err)
}
}
func MustAssertMounts(name, hostMountsFile, wantFile string) {
hostMounts := make([]*Mntent, 0, 128)
if err := IterMounts(hostMountsFile, func(e *Mntent) {
hostMounts = append(hostMounts, e)
}); err != nil {
fatalf("cannot parse host mounts: %v", err)
}
var want []Mntent
mustDecode(wantFile, &want)
for i := range want {
if want[i].Opts == "host_passthrough" {
for _, ent := range hostMounts {
if want[i].FSName == ent.FSName && want[i].Type == ent.Type {
// special case for tmpfs bind mounts
if want[i].FSName == "tmpfs" && want[i].Dir != ent.Dir {
continue
}
want[i].Opts = ent.Opts
goto out
}
}
fatalf("host passthrough missing %q", want[i].FSName)
out:
}
}
i := 0
if err := IterMounts(name, func(e *Mntent) {
if i == len(want) {
fatalf("got more than %d entries", i)
}
if !e.Is(&want[i]) {
fatalf("entry %d\n got: %s\nwant: %s", i,
e, &want[i])
}
printf("%s", e)
i++
}); err != nil {
fatalf("cannot iterate mounts: %v", err)
}
}
func MustAssertFS(e fs.FS, wantFile string) {
var want *FS
mustDecode(wantFile, &want)
if want == nil {
fatalf("invalid payload")
}
if err := want.Compare(".", e); err != nil {
fatalf("%v", err)
}
}
func MustAssertSeccomp() {
if TrySyscalls() != nil {
os.Exit(1)
}
}
|
