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Add and use a helper to run subprocess

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In most cases e.g. we do want to show stdout/stderr, and
it's handy to have a debug log when we're running
a subprocess.

While we're here, switch to just forking `cp` in
the setup code.

Signed-off-by: Colin Walters <walters@verbum.org>
This commit is contained in:
Colin Walters 2024-01-09 12:26:54 -05:00 • committed by Simon de Vlieger
parent 214fcda30e
commit 3c717fde11
1 changed files with 6 additions and 23 deletions
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29
bib/internal/setup/setup.go
View file

@ -2,9 +2,7 @@ package setup
import (
"fmt"
"io"
"os"
"os/exec"
"path/filepath"
"github.com/osbuild/bootc-image-builder/bib/internal/podmanutil"
@ -39,36 +37,21 @@ func EnsureEnvironment() error {
return err
}
if !utils.IsMountpoint(runTmp) {
if err := exec.Command("mount", "-t", "tmpfs", "tmpfs", runTmp).Run(); err != nil {
return fmt.Errorf("failed to mount tmpfs to %s: %w", runTmp, err)
if err := utils.RunCmdSync("mount", "-t", "tmpfs", "tmpfs", runTmp); err != nil {
return err
}
}
src, err := os.Open("/usr/bin/osbuild")
if err != nil {
return err
}
defer src.Close()
destPath := filepath.Join(runTmp, "osbuild")
dst, err := os.Create(destPath)
if err != nil {
if err := utils.RunCmdSync("cp", "-p", "/usr/bin/osbuild", destPath); err != nil {
return err
}
defer dst.Close()
if _, err := io.Copy(dst, src); err != nil {
if err := utils.RunCmdSync("chcon", installType, destPath); err != nil {
return err
}
if err := dst.Chmod(0o755); err != nil {
return err
}
dst.Close()
if err := exec.Command("chcon", installType, destPath).Run(); err != nil {
return fmt.Errorf("failed to chcon: %w", err)
}
// Create a bind mount into our target location; we can't copy it because
// again we have to perserve the SELinux label.
if err := exec.Command("mount", "--bind", destPath, osbuildPath).Run(); err != nil {
return fmt.Errorf("failed to bind mount to %s: %w", osbuildPath, err)
if err := utils.RunCmdSync("mount", "--bind", destPath, osbuildPath); err != nil {
return err
}
return nil
}