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os/exec: ignore pipe write errors when command completes successfully

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Fixes #9173

Change-Id: I83530533db84b07cb88dbf6ec690be48a06a9d7d
Reviewed-on: https://go-review.googlesource.com/12152
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Brad Fitzpatrick 2015-07-13 18:17:24 -06:00
parent 3c5eb96001
commit 73ca459a56
2 changed files with 31 additions and 0 deletions
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10
src/os/exec/exec.go
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@ -180,6 +180,16 @@ func (c *Cmd) stdin() (f *os.File, err error) {
c.closeAfterWait = append(c.closeAfterWait, pw)
c.goroutine = append(c.goroutine, func() error {
_, err := io.Copy(pw, c.Stdin)
// Ignore EPIPE errors copying to stdin if the program
// completed successfully otherwise.
// See Issue 9173.
if pe, ok := err.(*os.PathError); ok &&
pe.Op == "write" && pe.Path == "|1" &&
pe.Err == syscall.EPIPE {
err = nil
}
if err1 := pw.Close(); err == nil {
err = err1
}