env

type Pager ¶

type Pager struct {
	// contains filtered or unexported fields
}

Pager scrolls potentially large text in a terminal.

Implements io.Writer interface.

func NewPager() *Pager

func (p *Pager) Display() error

func (p *Pager) Printf(format string, args ...any) (n int, err error)

func (p *Pager) Write(text []byte) (n int, err error)

type Runner ¶

type Runner struct {
	CUPSPort int    // CUPS server port, 0 if none
	ESCLPort int    // eSCL server port, 0 if none
	ESCLPath string // Path part of the eSCL URL
	ESCLName string // eSCL scanner name (will be visible as SANE name)
}

Runner runs external program in the environment, where interactions with CUPS and the eSCL scanner are redirected to the specified ports and can be intercepted.

It does its work by setting the following environment variables:

• CUPS_SERVER=localhost:port
• SANE_AIRSCAN_DEVICE=escl:Scanner Name:http://localhost:port/eSCL

In the context of the program being executed, these variables are interpreted by the libcups.so and sane-airscan, respectively.

This is used by the mfp-proxy and mfp-virtual commands.

func (r *Runner) Run(ctx context.Context,
	command string, args ...string) error