49 lines
1.1 KiB
Go
49 lines
1.1 KiB
Go
package finger
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import (
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"bytes"
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"context"
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"errors"
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"os/exec"
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"tildegit.org/tjp/gus"
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)
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// ListingDenied is returned to reject online user listing requests.
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var ListingDenied = errors.New("Finger online user list denied.")
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// SystemFinger handles finger requests by invoking the finger(1) command-line utility.
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func SystemFinger(allowListings bool) gus.Handler {
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return func(ctx context.Context, request *gus.Request) *gus.Response {
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fingerPath, err := exec.LookPath("finger")
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if err != nil {
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_ = request.Server.LogError(
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"msg", "handler failure",
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"ctx", "exec.LookPath(\"finger\")",
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"err", err,
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)
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return Error("Could not resolve request.")
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}
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path := request.Path[1:]
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if len(path) == 0 && !allowListings {
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return Error(ListingDenied.Error())
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}
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args := make([]string, 0, 1)
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if len(path) > 0 {
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args = append(args, path)
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}
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cmd := exec.CommandContext(ctx, fingerPath, args...)
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outbuf := &bytes.Buffer{}
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cmd.Stdout = outbuf
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if err := cmd.Run(); err != nil {
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return Error(err.Error())
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}
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return Success(outbuf)
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}
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}
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