39460: Don't import PS4 if running as root.

There was an exploit in bash using SHELLOPTS to turn on xtrace,
however this can't happen in zsh, so this is simply a precaution.

1 files changed, 1 insertions, 0 deletions

diff --git a/Src/zsh.h b/Src/zsh.h
index bb8ce130c..052d754c9 100644
--- a/Src/zsh.h
+++ b/Src/zsh.h
@@ -1802,6 +1802,7 @@ struct tieddata {
 #define PM_ZSHSTORED	(1<<18) /* function stored in zsh form              */
 
 /* Remaining flags do not correspond directly to command line arguments */
+#define PM_DONTIMPORT_ROOT (1<<19) /* do not import if running as root */
 #define PM_SINGLE       (1<<20) /* special can only have a single instance  */
 #define PM_LOCAL	(1<<21) /* this parameter will be made local        */
 #define PM_SPECIAL	(1<<22) /* special builtin parameter                */