internal: pull EINTR loop from stdlib

Signed-off-by: Ophestra <cat@gensokyo.uk>

1 files changed, 19 insertions, 0 deletions

diff --git a/internal/file.go b/internal/file.go
new file mode 100644
index 00000000..153f0f99
--- /dev/null
+++ b/internal/file.go
@@ -0,0 +1,19 @@
+package internal
+
+import "syscall"
+
+// IgnoringEINTR makes a function call and repeats it if it returns an
+// EINTR error. This appears to be required even though we install all
+// signal handlers with SA_RESTART: see #22838, #38033, #38836, #40846.
+// Also #20400 and #36644 are issues in which a signal handler is
+// installed without setting SA_RESTART. None of these are the common case,
+// but there are enough of them that it seems that we can't avoid
+// an EINTR loop.
+func IgnoringEINTR(fn func() error) error {
+	for {
+		err := fn()
+		if err != syscall.EINTR {
+			return err
+		}
+	}
+}