unix: don't fail TestPpoll on EINTR

TestPpoll sometimes fails builders due to Ppoll getting interrupted and
returning EINTR:

--- FAIL: TestPpoll (0.00s)
    syscall_linux_test.go:299: Ppoll: unexpected error: interrupted system call

Fix this by retrying Ppoll in case of EINTR, same as CL 298189 in
TestPoll.

Fixes golang/go#66324

Change-Id: I8ce4e2c00fe3b7a078cd75b4b15bb076d3a87fb2
Reviewed-on: https://go-review.googlesource.com/c/sys/+/627395
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Tobias Klauser <tobias.klauser@gmail.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
1 file changed
tree: a09e71ff0458006839a79d10170209a7b252b0f1
  1. cpu/
  2. execabs/
  3. plan9/
  4. unix/
  5. windows/
  6. .gitattributes
  7. .gitignore
  8. codereview.cfg
  9. CONTRIBUTING.md
  10. go.mod
  11. LICENSE
  12. PATENTS
  13. README.md
README.md

sys

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