From 0cc3a2176bd396a35f44fcc28ec916b41f019e16 Mon Sep 17 00:00:00 2001
From: Stefan Zabka <zabkaste@hu-berlin.de>
Date: Wed, 13 May 2020 19:55:28 +0200
Subject: Made a shell that can exit

---
 02_exercise/Makefile |  2 +-
 02_exercise/shell.c  | 38 ++++++++++++++++++++++++++++++++++----
 2 files changed, 35 insertions(+), 5 deletions(-)

diff --git a/02_exercise/Makefile b/02_exercise/Makefile
index c43966f..5d1b360 100644
--- a/02_exercise/Makefile
+++ b/02_exercise/Makefile
@@ -6,7 +6,7 @@ SRC = $(wildcard *.c)
 OBJ = $(SRC:%.c=%.o)
 PCK = lab-2.zip
 
-CFLAGS = -std=gnu11 -c -g -Os -Wall -Werror -MMD -MP
+CFLAGS = -std=gnu11 -c -g -Os -Wall -Werror -MMD -MP -D=_GNU_SOURCE
 
 DEP = $(OBJ:%.o=%.d)
 -include $(DEP)
diff --git a/02_exercise/shell.c b/02_exercise/shell.c
index 0cea1f6..88b17fd 100644
--- a/02_exercise/shell.c
+++ b/02_exercise/shell.c
@@ -1,16 +1,46 @@
-#include <stdio.h> 
+#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
-#include <unistd.h>
 #include <fcntl.h>
 #include <signal.h>
+#include <sys/stat.h>
 #include <sys/types.h>
 #include <sys/wait.h>
-#include <sys/stat.h>
+#include <unistd.h>
 
 #include "array.h"
+#include "stdbool.h"
+
+void print_prompt(char const *const original_wd, char const *current_wd);
 
 int main(void) {
-	return 0;
+
+    char const *const original_wd = get_current_dir_name();
+    char const *current_wd = get_current_dir_name();
+
+    while (true) {
+        char *command = NULL;
+        size_t cap = 0;
+        size_t length = 0;
+        print_prompt(original_wd, current_wd);
+        if ((length = getline(&command, &cap, stdin)) < 0) {
+            fprintf(stderr, "Failed to read from STDIN");
+        }
+        if (strcmp(command, "exit\n") == 0) {
+            exit(0);
+        }
+        free((void *)command);
+    }
+    // Gotta cast to void otherwise we discard qualifiers
+    free((void *)original_wd);
+    free((void *)current_wd);
 }
+
+void print_prompt(char const *const original_wd, char const *current_wd) {
+
+    int result = strcmp(original_wd, current_wd);
+    if (result == 0) {
+        printf("./ > ");
+    }
+}
\ No newline at end of file
-- 
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