From 52de48b60f103d5c74c5b093457f8a926178f844 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?John=20Ankarstr=C3=B6m?= <john@ankarstrom.se>
Date: Mon, 21 Jun 2021 14:47:09 +0200
Subject: Support special !cd command

---
 repl.c | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/repl.c b/repl.c
index 1f439b1..8bd1354 100644
--- a/repl.c
+++ b/repl.c
@@ -1,11 +1,12 @@
+#include <err.h>
+#include <readline/history.h>
+#include <readline/readline.h>
+#include <signal.h>
+#include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
-#include <stdbool.h>
-#include <signal.h>
 #include <string.h>
-#include <err.h>
-#include <readline/readline.h>
-#include <readline/history.h>
+#include <unistd.h>
 
 void handle_int() { /* handle ctrl-c */
 	printf("\n");
@@ -52,6 +53,11 @@ int main(int argc, char *argv[]) {
 		int size = strlen(argv[argc-1]) + 1 + strlen(input) + 1;
 		char *command = malloc(size);
 		if (command == NULL) err(1, NULL);
+		if (strncmp(input, "!cd ", 4) == 0) {
+			if (chdir(input + 4) == -1)
+				warn(NULL);
+			goto next;
+		}
 		if (input[0] == '!')
 			snprintf(command, size, "%s", input + 1);
 		else if (append)
@@ -61,6 +67,7 @@ int main(int argc, char *argv[]) {
 
 		system(command);
 
+next:
 		free(input);
 		free(command);
 	}
-- 
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