More sh updates (with related changes to everything else). Switched

to using getopt and cleaned up the resulting mess.  if-then-else-fi
is now basically working (given a bunch of constraints).
 -Erik

1 files changed, 24 insertions, 1 deletions

diff --git a/shell/cmdedit.c b/shell/cmdedit.c
index 0ce64beeb..042064f1e 100644
--- a/shell/cmdedit.c
+++ b/shell/cmdedit.c
@@ -84,6 +84,7 @@ static int cmdedit_termw = 80;  /* actual terminal width */
 static int cmdedit_scroll = 27; /* width of EOL scrolling region */
 static int history_counter = 0; /* Number of commands in history list */
 static int reset_term = 0;              /* Set to true if the terminal needs to be reset upon exit */
+static int exithandler_set = 0; /* Set to true when atexit() has been called */
 
 struct history {
         char *s;
@@ -709,10 +710,32 @@ extern void cmdedit_read_input(char* prompt, char command[BUFSIZ])
 
 extern void cmdedit_init(void)
 {
-        atexit(cmdedit_reset_term);
+        if(exithandler_set == 0) {
+                atexit(cmdedit_reset_term);     /* be sure to do this only once */
+                exithandler_set = 1;
+        }
         signal(SIGKILL, clean_up_and_die);
         signal(SIGINT, clean_up_and_die);
         signal(SIGQUIT, clean_up_and_die);
         signal(SIGTERM, clean_up_and_die);
 }
+
+/*
+** Undo the effects of cmdedit_init() as good as we can:
+** I am not aware of a way to revoke an atexit() handler,
+** but, fortunately, our particular handler can be made
+** a no-op by setting reset_term = 0.
+*/
+extern void cmdedit_terminate(void)
+{
+        cmdedit_reset_term();
+        reset_term = 0;
+        signal(SIGKILL, SIG_DFL);
+        signal(SIGINT, SIG_DFL);
+        signal(SIGQUIT, SIG_DFL);
+        signal(SIGTERM, SIG_DFL);
+}
+
+
+
 #endif                                                  /* BB_FEATURE_SH_COMMAND_EDITING */