84 lines
2.2 KiB
Go
84 lines
2.2 KiB
Go
// Copyright 2015 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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package system
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import (
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"bufio"
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"fmt"
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"io"
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"log"
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"os/exec"
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"strings"
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)
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func ResizeRootFS() error {
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var err error
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var stdout io.ReadCloser
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var device string
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var partition string
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cmd := exec.Command("mount", "-t", "ufs", "-p")
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stdout, err = cmd.StdoutPipe()
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if err != nil {
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log.Printf("failed to get mounted file systems %s\n", err.Error())
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return err
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}
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r := bufio.NewReader(stdout)
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if err = cmd.Start(); err != nil {
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log.Printf("failed to get mounted file systems %s\n", err.Error())
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return err
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}
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for {
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line, err := r.ReadString('\n')
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if err != nil {
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break
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}
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ps := strings.Fields(line) // /dev/da0s1a / ufs rw 1 1
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if ps[1] == "/" {
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var i int
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if i = strings.Index(ps[0], "s"); i < 0 {
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return fmt.Errorf("failed to find slice number")
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}
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device = ps[0][:i]
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partition = strings.TrimSuffix(ps[0][i:], "a")
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}
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}
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if err = cmd.Wait(); err != nil || partition == "" {
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return fmt.Errorf("failed to find partition on %s\n", device)
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}
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commands := []string{
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"sysctl kern.geom.debugflags=16",
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"gpart resize -i 1 " + strings.Split(device, "/")[2],
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"gpart resize -i 1 " + strings.Split(device, "/")[2] + partition,
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"true > " + device,
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"true > " + device + partition,
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"true > " + device + partition + "a",
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"gpart resize -i 1 " + strings.Split(device, "/")[2],
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"gpart resize -i 1 " + strings.Split(device, "/")[2] + partition,
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"growfs -y /",
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}
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for _, command := range commands {
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log.Printf("resize fs %s\n", command)
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exec.Command(strings.Split(command, " ")[0], strings.Split(command, " ")[1:]...).Run()
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}
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return nil
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}
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