Add signal proxying to podman run, start, and attach

Also removes sig-proxy from 'podman create', where is does not
make sense.

Signed-off-by: Matthew Heon <matthew.heon@gmail.com>

1 files changed, 33 insertions, 0 deletions

diff --git a/cmd/podman/sigproxy.go b/cmd/podman/sigproxy.go
new file mode 100644
index 000000000..fd1415dc6
--- /dev/null
+++ b/cmd/podman/sigproxy.go
@@ -0,0 +1,33 @@
+package main
+
+import (
+	"os"
+	"syscall"
+
+	"github.com/docker/docker/pkg/signal"
+	"github.com/projectatomic/libpod/libpod"
+	"github.com/sirupsen/logrus"
+)
+
+func ProxySignals(ctr *libpod.Container) {
+	sigBuffer := make(chan os.Signal, 128)
+	signal.CatchAll(sigBuffer)
+
+	logrus.Debugf("Enabling signal proxying")
+
+	go func() {
+		for s := range sigBuffer {
+			// Ignore SIGCHLD and SIGPIPE - these are mostly likely
+			// intended for the podman command itself.
+			if s == signal.SIGCHLD || s == signal.SIGPIPE {
+				continue
+			}
+
+			if err := ctr.Kill(uint(s.(syscall.Signal))); err != nil {
+				logrus.Errorf("Error forwarding signal %d to container %s: %v", s, ctr.ID(), err)
+			}
+		}
+	}()
+
+	return
+}