32 lines
529 B
Go
32 lines
529 B
Go
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package main
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import (
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"fmt"
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"io"
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"os"
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"github.com/dustin/go-humanize"
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)
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const usage = "lim <number of bytes, default 1MB>"
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func main() {
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size := int64(1 * 1024 * 1024)
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switch len(os.Args) {
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case 1:
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case 2:
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dest, err := humanize.ParseBytes(os.Args[1])
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if err != nil {
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fmt.Fprintf(os.Stderr, "unable to parse quantity: %v\n%v\n", err, usage)
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os.Exit(1)
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}
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size = int64(dest)
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default:
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fmt.Fprintf(os.Stderr, "%v\n", usage)
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os.Exit(1)
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}
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lr := io.LimitReader(os.Stdin, size)
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io.Copy(os.Stdout, lr)
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}
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