Patch from Magnus Damm <damm@opensource.se> to avoid lash hanging

on serial ports


git-svn-id: svn://busybox.net/trunk/busybox@3475 69ca8d6d-28ef-0310-b511-8ec308f3f277

1 files changed, 7 insertions, 1 deletions

diff --git a/shell/lash.c b/shell/lash.c
index 22e3c779e..b3f7cb6a8 100644
--- a/shell/lash.c
+++ b/shell/lash.c
@@ -1524,9 +1524,15 @@ void free_memory(void)
  * we don't fight over who gets the foreground */
 static void setup_job_control()
 {
+        int status;
+        
         /* Loop until we are in the foreground.  */
-        while (tcgetpgrp (shell_terminal) != (shell_pgrp = getpgrp ()))
+        while ((status = tcgetpgrp (shell_terminal)) >= 0) {
+                if (status == (shell_pgrp = getpgrp ())) {
+                        break;
+                }
                 kill (- shell_pgrp, SIGTTIN);
+        }
 
         /* Ignore interactive and job-control signals.  */
         signal(SIGINT, SIG_IGN);