How is GNU `yes` so fast?

Re:How is GNU `yes` so fast? by x1798DE on Tuesday June 13, 2017 @10:12AM (#14544796)

I think rm -rf would also suppress errors in addition to confirmation messages, so presumably if you want a "soft" force...

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Re:How is GNU `yes` so fast? by eridius on Tuesday June 13, 2017 @03:34PM (#14547874)

No it doesn't.

  > rm -rf foo/bar
  rm: foo/bar: Permission denied

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Re:How is GNU `yes` so fast? by mnarayan01 on Wednesday June 14, 2017 @09:11AM (#14552434)

If foo/bar does not exist, it should be silent. Via http://pubs.opengroup.org/onlinepubs/007904975/utilities/rm.... on the -f option:

> [...] Do not write diagnostic messages or modify the exit status in the case of nonexistent operands. [...]

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Re:How is GNU `yes` so fast? by eridius on Wednesday June 14, 2017 @01:44PM (#14554474)

Yes, but that's the only error it suppresses, and that's because "not existing" isn't really an error for a tool that's trying to delete something. In my example foo/bar existed but I didn't have permissions to delete it, and as you'll see it printed out that error.

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