38 lines
584 B
Go
38 lines
584 B
Go
package main
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import (
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"bytes"
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"fmt"
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"io"
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"os"
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)
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func tmpPrint() {
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fmt.Println("output")
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}
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func main() {
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old := os.Stdout // keep backup of the real stdout
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r, w, _ := os.Pipe()
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os.Stdout = w
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tmpPrint()
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outC := make(chan string)
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// copy the output in a separate goroutine so printing can't block indefinitely
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go func() {
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var buf bytes.Buffer
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io.Copy(&buf, r)
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outC <- buf.String()
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}()
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// back to normal state
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w.Close()
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os.Stdout = old // restoring the real stdout
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out := <-outC
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// reading our temp stdout
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fmt.Println("previous output:")
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fmt.Print(out)
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}
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