mkinit: Split reset into exitreset and reset

Commit Message

Herbert Xu May 5, 2018, 4:39 p.m. UTC

Previously reset was called after exitshell.  This was changed
so that it was called before exitshell because certain state needed
to be reset in order for the EXIT trap to work.

However, this caused issues because certain other states (such
as local variables) should not be reset.  This patch fixes this
by creating a new function exitreset that is called prior to
exitshell and moving reset back to its original location.

Signed-off-by: Herbert Xu <[e-mail]>

Patch

diff --git a/src/eval.c b/src/eval.c
index a27d657..94c56ec 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -112,7 +112,7 @@  STATIC const struct builtincmd bltin = {
 #ifdef mkinit
 INCLUDE "eval.h"
 
-RESET {
+EXITRESET {
 	evalskip = 0;
 	loopnest = 0;
 	if (savestatus >= 0) {
diff --git a/src/expand.c b/src/expand.c
index 7ed259a..45e9b79 100644
--- a/src/expand.c
+++ b/src/expand.c
@@ -1780,7 +1780,7 @@  varunset(const char *end, const char *var, const char *umsg, int varflags)
 
 INCLUDE "expand.h"
 
-RESET {
+EXITRESET {
 	ifsfree();
 }
 
diff --git a/src/init.h b/src/init.h
index e026e86..49791a0 100644
--- a/src/init.h
+++ b/src/init.h
@@ -35,5 +35,5 @@ 
  */
 
 void init(void);
+void exitreset(void);
 void reset(void);
-void initshellproc(void);
diff --git a/src/main.c b/src/main.c
index fcd3e7d..b8f3c08 100644
--- a/src/main.c
+++ b/src/main.c
@@ -106,7 +106,7 @@  main(int argc, char **argv)
 		int e;
 		int s;
 
-		reset();
+		exitreset();
 
 		e = exception;
 
@@ -114,6 +114,8 @@  main(int argc, char **argv)
 		if (e == EXEXIT || s == 0 || iflag == 0 || shlvl)
 			exitshell();
 
+		reset();
+
 		if (e == EXINT
 #if ATTY
 		 && (! attyset() || equal(termval(), "emacs"))
diff --git a/src/mkinit.c b/src/mkinit.c
index 9714bee..5bca9ee 100644
--- a/src/mkinit.c
+++ b/src/mkinit.c
@@ -106,6 +106,13 @@  char init[] = "\
  * Initialization code.\n\
  */\n";
 
+char exitreset[] = "\
+/*\n\
+ * This routine is called when an error or an interrupt occurs in an\n\
+ * interactive shell and control is returned to the main command loop\n\
+ * but prior to exitshell. \n\
+ */\n";
+
 char reset[] = "\
 /*\n\
  * This routine is called when an error or an interrupt occurs in an\n\
@@ -115,6 +122,7 @@  char reset[] = "\
 
 struct event event[] = {
 	{"INIT", "init", init},
+	{"EXITRESET", "exitreset", exitreset},
 	{"RESET", "reset", reset},
 	{NULL, NULL}
 };
diff --git a/src/redir.c b/src/redir.c
index 71b0f77..e67cc0a 100644
--- a/src/redir.c
+++ b/src/redir.c
@@ -374,7 +374,7 @@  popredir(int drop)
 
 INCLUDE "redir.h"
 
-RESET {
+EXITRESET {
 	/*
 	 * Discard all saved file descriptors.
 	 */