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package ldd
import (
"bytes"
"context"
"io"
"os"
"time"
"hakurei.app/container"
"hakurei.app/container/seccomp"
)
const lddTimeout = 2 * time.Second
var (
msgStatic = []byte("Not a valid dynamic program")
msgStaticGlibc = []byte("not a dynamic executable")
)
func Exec(ctx context.Context, p string) ([]*Entry, error) {
c, cancel := context.WithTimeout(ctx, lddTimeout)
defer cancel()
z := container.New(c, "ldd", p)
z.Hostname = "hakurei-ldd"
z.SeccompFlags |= seccomp.AllowMultiarch
z.SeccompPresets |= seccomp.PresetStrict
stdout, stderr := new(bytes.Buffer), new(bytes.Buffer)
z.Stdout = stdout
z.Stderr = stderr
z.Bind(container.FHSRoot, container.FHSRoot, 0).Proc(container.FHSProc).Dev(container.FHSProc, false)
if err := z.Start(); err != nil {
return nil, err
}
defer func() { _, _ = io.Copy(os.Stderr, stderr) }()
if err := z.Serve(); err != nil {
return nil, err
}
if err := z.Wait(); err != nil {
m := stderr.Bytes()
if bytes.Contains(m, append([]byte(p+": "), msgStatic...)) ||
bytes.Contains(m, msgStaticGlibc) {
return nil, nil
}
return nil, err
}
v := stdout.Bytes()
return Parse(v)
}
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