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// Package bindings provides golang-based access
// to the Podman REST API. Users can then interact with API endpoints
// to manage containers, images, pods, etc.
//
// This package exposes a series of methods that allow users to firstly
// create their connection with the API endpoints. Once the connection
// is established, users can then manage the Podman container runtime.
package bindings
import (
"errors"
"fmt"
"io"
"os"
"github.com/blang/semver"
"golang.org/x/crypto/ssh/terminal"
)
var (
// PTrue is a convenience variable that can be used in bindings where
// a pointer to a bool (optional parameter) is required.
pTrue = true
PTrue = &pTrue
// PFalse is a convenience variable that can be used in bindings where
// a pointer to a bool (optional parameter) is required.
pFalse = false
PFalse = &pFalse
// APIVersion - podman will fail to run if this value is wrong
APIVersion = semver.MustParse("1.0.0")
)
// readPassword prompts for a secret and returns value input by user from stdin
// Unlike terminal.ReadPassword(), $(echo $SECRET | podman...) is supported.
// Additionally, all input after `<secret>/n` is queued to podman command.
func readPassword(prompt string) (pw []byte, err error) {
fd := int(os.Stdin.Fd())
if terminal.IsTerminal(fd) {
fmt.Fprint(os.Stderr, prompt)
pw, err = terminal.ReadPassword(fd)
fmt.Fprintln(os.Stderr)
return
}
var b [1]byte
for {
n, err := os.Stdin.Read(b[:])
// terminal.ReadPassword discards any '\r', so we do the same
if n > 0 && b[0] != '\r' {
if b[0] == '\n' {
return pw, nil
}
pw = append(pw, b[0])
// limit size, so that a wrong input won't fill up the memory
if len(pw) > 1024 {
err = errors.New("password too long, 1024 byte limit")
}
}
if err != nil {
// terminal.ReadPassword accepts EOF-terminated passwords
// if non-empty, so we do the same
if err == io.EOF && len(pw) > 0 {
err = nil
}
return pw, err
}
}
}
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