214fcda30e
As this is a footgun that multiple people have run into. Signed-off-by: Colin Walters <walters@verbum.org>
38 lines
784 B
Go
38 lines
784 B
Go
package podmanutil
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import (
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"bufio"
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"bytes"
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"errors"
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"fmt"
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"io/fs"
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"os"
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)
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// envPath is written by podman
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const envPath = "/run/.containerenv"
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// rootlessKey is set when we are rootless
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const rootlessKey = "rootless=1"
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// IsRootless detects if we are running rootless in podman;
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// other situations (e.g. docker) will successfuly return false.
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func IsRootless() (bool, error) {
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buf, err := os.ReadFile(envPath)
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if err != nil {
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if errors.Is(err, fs.ErrNotExist) {
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return false, nil
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}
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return false, err
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}
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scanner := bufio.NewScanner(bytes.NewReader(buf))
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for scanner.Scan() {
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if scanner.Text() == rootlessKey {
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return true, nil
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}
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}
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if err := scanner.Err(); err != nil {
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return false, fmt.Errorf("parsing %s: %w", envPath, err)
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}
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return false, nil
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}
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