Add -ledit to ngctl.

Somebody submitted this long time ago, and it has been sitting in my
tree for months because I thought archie would pick it up.

Submitted by:	(sorry, lost track)

2 files changed, 54 insertions, 8 deletions

diff --git a/usr.sbin/ngctl/Makefile b/usr.sbin/ngctl/Makefile
index d8dee7c..9565b15 100644
--- a/usr.sbin/ngctl/Makefile
+++ b/usr.sbin/ngctl/Makefile
@@ -6,7 +6,7 @@ SRCS=		main.c mkpeer.c config.c connect.c name.c show.c list.c \
 		msg.c debug.c shutdown.c rmhook.c status.c types.c
 MAN8=		ngctl.8
 DPADD+=		${LIBNETGRAPH}
-LDADD+=		-lnetgraph
+LDADD+=		-lnetgraph -ledit
 COPTS+=		-Wall
 
 .include <bsd.prog.mk>
diff --git a/usr.sbin/ngctl/main.c b/usr.sbin/ngctl/main.c
index 5e9411c..93dfed3 100644
--- a/usr.sbin/ngctl/main.c
+++ b/usr.sbin/ngctl/main.c
@@ -39,23 +39,27 @@
  */
 
 #include "ngctl.h"
+#include <histedit.h>
 
 #define PROMPT			"+ "
 #define MAX_ARGS		512
 #define WHITESPACE		" \t\r\n\v\f"
 #define DUMP_BYTES_PER_LINE	16
+#define HISTSIZE		100
 
 /* Internal functions */
 static int	ReadFile(FILE *fp);
 static int	DoParseCommand(char *line);
 static int	DoCommand(int ac, char **av);
 static int	DoInteractive(void);
+static int	DoEditLine(void);
 static const	struct ngcmd *FindCommand(const char *string);
 static int	MatchCommand(const struct ngcmd *cmd, const char *s);
 static void	Usage(const char *msg);
 static int	ReadCmd(int ac, char **av);
 static int	HelpCmd(int ac, char **av);
 static int	QuitCmd(int ac, char **av);
+static char *	prompt(EditLine *el);
 
 /* List of commands */
 static const struct ngcmd *const cmds[] = {
@@ -103,6 +107,18 @@ const struct ngcmd quit_cmd = {
 /* Our control and data sockets */
 int	csock, dsock;
 
+/* Provide editline(3) functionality */
+static	EditLine *el = NULL;
+
+/*
+ * EL_PROMPT expects a function for the prompt
+ */
+static char *
+prompt(EditLine *el)
+{
+	return PROMPT;
+}
+
 /*
  * main()
  */
@@ -252,13 +268,7 @@ DoInteractive(void)
 
 		/* Get any user input */
 		if (FD_ISSET(0, &rfds)) {
-			char buf[LINE_MAX];
-
-			if (fgets(buf, sizeof(buf), stdin) == NULL) {
-				printf("\n");
-				break;
-			}
-			if (DoParseCommand(buf) == CMDRTN_QUIT)
+			if (DoEditLine() == CMDRTN_QUIT)
 				break;
 		}
 	}
@@ -302,6 +312,42 @@ DoCommand(int ac, char **av)
 }
 
 /*
+ * Handle user input with editline(3)
+ */
+static int
+DoEditLine(void)
+{
+	int num;
+	char *av = "ngctl";
+	const char *buf;
+	History *hist;
+
+	hist = history_init();			/* Initialize history */
+	history(hist, H_EVENT, HISTSIZE);	/* Size of history */
+
+	el = el_init(av, stdin, stdout);	/* Initialize editline */
+
+	el_set(el, EL_PROMPT, prompt);		/* Set the prompt */
+	el_set(el, EL_EDITOR, "vi");		/* Default editor is vi */
+	el_set(el, EL_HIST, history, hist);	/* Use history */
+	el_set(el, EL_SIGNAL, 1);		/* Handle signals properly */
+	el_source(el, NULL);			/* Source user defaults */
+
+	while ((buf = el_gets(el, &num)) != NULL && num != 0) {
+
+		history(hist, H_ENTER, buf);	/* Add command to history */
+
+		if (DoParseCommand((char *)buf) == CMDRTN_QUIT)
+			return (CMDRTN_QUIT);	/* Handle "quit" command */
+	}
+
+	el_end(el);				/* Clean up editline */
+	history_end(hist);			/*    and history    */
+
+	return 0;
+}
+
+/*
  * Find a command
  */
 static const struct ngcmd *