rootless: set controlling terminal for podman in the userns

Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/pkg/rootless/rootless_linux.c b/pkg/rootless/rootless_linux.c
index 9cb79ed4d..d6a2793a7 100644
--- a/pkg/rootless/rootless_linux.c
+++ b/pkg/rootless/rootless_linux.c
@@ -16,6 +16,8 @@
 #include <sys/types.h>
 #include <sys/prctl.h>
 #include <dirent.h>
+#include <termios.h>
+#include <sys/ioctl.h>
 
 static const char *_max_user_namespaces = "/proc/sys/user/max_user_namespaces";
 static const char *_unprivileged_user_namespaces = "/proc/sys/kernel/unprivileged_userns_clone";
@@ -178,6 +180,11 @@ reexec_userns_join (int userns, int mountns)
       _exit (EXIT_FAILURE);
     }
 
+  if (isatty (1) && ioctl (1, TIOCSCTTY, 0) == -1) {
+      fprintf (stderr, "cannot ioctl(TIOCSCTTY): %s\n", strerror (errno));
+      _exit (EXIT_FAILURE);
+  }
+
   if (setns (userns, 0) < 0)
     {
       fprintf (stderr, "cannot setns: %s\n", strerror (errno));