buffer: make readFromFd work with pipes

1 files changed, 8 insertions, 1 deletions

diff --git a/src/local/container.nim b/src/local/container.nim
index d191c6b3..2f4d0044 100644
--- a/src/local/container.nim
+++ b/src/local/container.nim
@@ -983,7 +983,14 @@ proc setStream*(container: Container, stream: Stream) =
     container.iface = newBufferInterface(stream)
     if container.source.t == LOAD_PIPE:
       container.iface.passFd(container.source.fd).then(proc() =
-        discard close(container.source.fd))
+        discard close(container.source.fd)
+        if container.source.fd == 0:
+          # We have just closed stdin.
+          # Leaving the stdin fileno open to grab is a bad idea.
+          # (Yes, I've just got bitten by this: dup2(0, 0). Ouch.)
+          let devnull = open("/dev/null", O_RDONLY)
+          discard dup2(devnull, 0)
+      )
       stream.flush()
     container.load()
   else: