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Expose some CPIO related helpers #36

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Expose some CPIO related helpers #36

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eb3c1c2
Expose method to return CpioStream for RPM contents
rmohr Oct 27, 2020
2c4aa13
Add CpioEntry methods to interact with payload
rmohr Dec 15, 2020
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12 changes: 12 additions & 0 deletions cpio/cpio.go
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Original file line number Diff line number Diff line change
Expand Up @@ -46,6 +46,18 @@ type countingReader struct {
curPos int64
}

func (ce *CpioEntry) ReadAll() ([]byte, error) {
return io.ReadAll(ce.payload)
}

func (ce *CpioEntry) Copy(dst io.Writer) (written int64, err error) {
return io.Copy(dst, ce.payload)
}

func (ce *CpioEntry) HasPayload() bool {
return ce.payload != nil
}

// NewCpioStream starts reading files from a cpio archive
func NewCpioStream(stream io.Reader) *CpioStream {
return &CpioStream{
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10 changes: 10 additions & 0 deletions rpmutils.go
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Original file line number Diff line number Diff line change
Expand Up @@ -91,6 +91,16 @@ func (rpm *Rpm) PayloadReaderExtended() (PayloadReader, error) {
return newPayloadReader(pld, files), nil
}

// CpioStream returns a cpio stream for the RPM payload
func (rpm *Rpm) CpioStream() (*cpio.CpioStream, error) {
pld, err := uncompressRpmPayloadReader(rpm.f, rpm.Header)
if err != nil {
return nil, err
}

return cpio.NewCpioStream(pld), nil
}

// ReadHeader reads the signature and general headers from a RPM.
//
// The stream is positioned for reading the compressed payload following the headers.
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