76 lines
2.1 KiB
Go
76 lines
2.1 KiB
Go
// Copyright 2017 CoreOS, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// +build linux
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package client
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import (
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"bytes"
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"fmt"
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"io/ioutil"
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)
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const (
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machineIDPath = "/etc/machine-id"
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bootIDPath = "/proc/sys/kernel/random/boot_id"
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)
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// NewMachineClient creates a machine-wide client, updating applications
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// that may be used by multiple users. On Linux the system's machine id
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// is used as the user id, and boot id is used as the omaha session id.
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func NewMachineClient(serverURL string) (*Client, error) {
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machineID, err := ioutil.ReadFile(machineIDPath)
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if err != nil {
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fmt.Errorf("omaha: failed to read machine id: %v", err)
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}
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machineID = bytes.TrimSpace(machineID)
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// Although machineID should be a UUID, it is formatted as a
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// plain hex string, omitting the normal '-' separators, so it
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// should be 32 bytes long. It would be nice to reformat it to
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// add the '-' chars but update_engine doesn't so stick with its
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// behavior for now.
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if len(machineID) < 32 {
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fmt.Errorf("omaha: incomplete machine id: %q",
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machineID)
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}
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bootID, err := ioutil.ReadFile(bootIDPath)
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if err != nil {
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fmt.Errorf("omaha: failed to read boot id: %v", err)
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}
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bootID = bytes.TrimSpace(bootID)
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// unlike machineID, bootID *does* include '-' chars.
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if len(bootID) < 36 {
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fmt.Errorf("omaha: incomplete boot id: %q", bootID)
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}
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c := &Client{
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apiClient: newHTTPClient(),
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clientVersion: "go-omaha",
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userID: string(machineID),
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sessionID: string(bootID),
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isMachine: true,
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apps: make(map[string]*AppClient),
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}
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if err := c.SetServerURL(serverURL); err != nil {
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return nil, err
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}
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return c, nil
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}
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