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bind_posix.go
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bind_posix.go
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// Copyright (C) 2017 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// +build !windows
package bind
import (
"context"
"fmt"
"io/ioutil"
"net"
"path/filepath"
"github.com/google/gapid/gapis/perfetto"
)
const (
perfettoSocket = "/tmp/perfetto-consumer"
)
// ListExecutables returns the executables in a particular directory as given by path
func (b *binding) ListExecutables(ctx context.Context, path string) ([]string, error) {
if path == "" {
path = "/"
}
rets := []string{}
infos, err := ioutil.ReadDir(path)
if err != nil {
return rets, nil
}
for _, inf := range infos {
if inf.Mode().IsRegular() && (inf.Mode()&0500) == 0500 {
rets = append(rets, inf.Name())
}
}
return rets, nil
}
// GetURIRoot returns the root URI for the entire system
func (b *binding) GetURIRoot() string {
return "/"
}
// ListDirectories returns a list of directories rooted at a particular path
func (b *binding) ListDirectories(ctx context.Context, path string) ([]string, error) {
rets := []string{}
infos, err := ioutil.ReadDir(path)
if err != nil {
return rets, nil
}
for _, inf := range infos {
if inf.Mode().IsDir() {
if _, err := ioutil.ReadDir(filepath.Join(path, inf.Name())); err == nil {
rets = append(rets, inf.Name())
}
}
}
return rets, nil
}
// SupportsPerfetto returns true if the given device supports taking a
// Perfetto trace.
func (b *binding) SupportsPerfetto(ctx context.Context) bool {
if support, err := b.IsFile(ctx, perfettoSocket); err == nil {
return support
}
return false
}
// ConnectPerfetto connects to a Perfetto service running on this device
// and returns an open socket connection to the service.
func (b *binding) ConnectPerfetto(ctx context.Context) (*perfetto.Client, error) {
if !b.SupportsPerfetto(ctx) {
return nil, fmt.Errorf("Perfetto is not supported on this device")
}
conn, err := net.Dial("unix", perfettoSocket)
if err != nil {
return nil, err
}
return perfetto.NewClient(ctx, conn, nil)
}