sh: Pass TERM changes to libedit.

I have changed the patch slightly to ignore TERM changes in subshells.

PR:		bin/146916
Submitted by:	Guy Yur
Obtained from:	NetBSD

4 files changed, 22 insertions, 0 deletions

diff --git a/bin/sh/histedit.c b/bin/sh/histedit.c
index cdde09a..521c6f7 100644
--- a/bin/sh/histedit.c
+++ b/bin/sh/histedit.c
@@ -98,6 +98,8 @@ histedit(void)
 			/*
 			 * turn editing on
 			 */
+			char *term;
+
 			INTOFF;
 			if (el_in == NULL)
 				el_in = fdopen(0, "r");
@@ -107,6 +109,11 @@ histedit(void)
 				el_out = fdopen(2, "w");
 			if (el_in == NULL || el_err == NULL || el_out == NULL)
 				goto bad;
+			term = lookupvar("TERM");
+			if (term)
+				setenv("TERM", term, 1);
+			else
+				unsetenv("TERM");
 			el = el_init(arg0, el_in, el_out, el_err);
 			if (el != NULL) {
 				if (hist)
@@ -160,6 +167,13 @@ sethistsize(hs)
 	}
 }
 
+void
+setterm(const char *term)
+{
+	if (rootshell && el != NULL && term != NULL)
+		el_set(el, EL_TERMINAL, term);
+}
+
 int
 histcmd(int argc, char **argv)
 {
diff --git a/bin/sh/myhistedit.h b/bin/sh/myhistedit.h
index f4fa374..bc9fd4e 100644
--- a/bin/sh/myhistedit.h
+++ b/bin/sh/myhistedit.h
@@ -38,6 +38,7 @@ extern int displayhist;
 
 void histedit(void);
 void sethistsize(const char *);
+void setterm(const char *);
 int histcmd(int, char **);
 int not_fcnumber(const char *);
 int str_to_event(const char *, int);
diff --git a/bin/sh/var.c b/bin/sh/var.c
index 75de239..6f4acae 100644
--- a/bin/sh/var.c
+++ b/bin/sh/var.c
@@ -80,6 +80,7 @@ struct varinit {
 
 #ifndef NO_HISTORY
 struct var vhistsize;
+struct var vterm;
 #endif
 struct var vifs;
 struct var vmail;
@@ -114,6 +115,10 @@ STATIC const struct varinit varinit[] = {
 	  NULL },
 	{ &vps4,	0,				"PS4=+ ",
 	  NULL },
+#ifndef NO_HISTORY
+	{ &vterm,	VUNSET,				"TERM=",
+	  setterm },
+#endif
 	{ &voptind,	0,				"OPTIND=1",
 	  getoptsreset },
 	{ NULL,	0,				NULL,
diff --git a/bin/sh/var.h b/bin/sh/var.h
index 6a02630..1ec707b 100644
--- a/bin/sh/var.h
+++ b/bin/sh/var.h
@@ -77,6 +77,7 @@ extern struct var vps2;
 extern struct var vps4;
 #ifndef NO_HISTORY
 extern struct var vhistsize;
+extern struct var vterm;
 #endif
 
 /*
@@ -96,6 +97,7 @@ extern struct var vhistsize;
 #define optindval()	(voptind.text + 7)
 #ifndef NO_HISTORY
 #define histsizeval()	(vhistsize.text + 9)
+#define termval()	(vterm.text + 5)
 #endif
 
 #define mpathset()	((vmpath.flags & VUNSET) == 0)