Only execute $PROMPT_COMMAND when appropriate. (trunk r6772)

svn path=/main/branches/2.1.2/; revision=6773

diff --git a/pym/output.py b/pym/output.py
index 2327c91aaa88349237b6e30c1212fb042ea55577..bd9c474e6ee3b5acbf242d3153c16a625f110fc5 100644 (file)
--- a/pym/output.py
+++ b/pym/output.py
@@ -194,7 +194,8 @@ def xtermTitleReset():
                if prompt_command == "":
                        default_xterm_title = ""
                elif prompt_command is not None:
-                       os.system(prompt_command)
+                       if dotitles and "TERM" in os.environ and sys.stderr.isatty():
+                               os.system(prompt_command)
                        return
                else:
                        pwd = os.getenv('PWD','')