wrote a makefile and added background job support

main.c

@@ -5,6 +5,19 @@
 #include<string.h>
 #include<readline/readline.h>
 #include<readline/history.h>
+#include<signal.h>
+void handleSIGINT(int sig) {
+  printf("\n");
+}
+int detectBackgrount(char **args) {
+  for (int i = 0; args[i] != NULL; i++) {
+    if (strcmp(args[i], "&") == 0) {
+      args[i] = NULL;
+      return 0;
+    }
+    }
+  return 1;
+}
 int seperatePipe(char **args) {
   for(int i = 0; args[i] != NULL; i++) {
     if (strcmp(args[i], "|") == 0) return i;
@@ -22,6 +35,7 @@ void executePipe(char **args, int pipeIndex) {
     dup2(fd[1], STDOUT_FILENO);
     close(fd[0]);
     close(fd[1]);
+    signal(SIGINT, SIG_DFL);
     execvp(cmd1[0], cmd1);
     perror("tinysh");
     exit(1);
@@ -31,6 +45,7 @@ void executePipe(char **args, int pipeIndex) {
     dup2(fd[0], STDIN_FILENO);
     close(fd[0]);
     close(fd[1]);
+    signal(SIGINT, SIG_DFL);
     execvp(cmd2[0], cmd2);
     perror("tinysh");
     exit(1);
@@ -62,13 +77,14 @@ char **parse(char *line) {
   return args;
 }
 int main() {
+	signal(SIGINT, handleSIGINT);
 	while(1) {
 		char *user = getenv("USER");
 		char dir[1024];
 		getcwd(dir, sizeof(dir));
 		char host[1024];
 		gethostname(host, sizeof(host));
-		char prompt[2048];
+		char prompt[2051];
 		snprintf(prompt, sizeof(prompt), "%s@%s %s$ ", user, host, dir);
 		char *line = readline(prompt);
 		if(line == NULL) return 0;
@@ -76,6 +92,7 @@ int main() {
 		char **parsed = parse(line);
 		if(parsed[0] == NULL) { free(parsed); free(line); continue; }
 		if(handleBuiltins(parsed)) { free(line); free(parsed); continue; }
+		int background = detectBackgrount(parsed);
 		int pipeIndex = seperatePipe(parsed);
 		if (pipeIndex != -1) { 
 		  executePipe(parsed, pipeIndex);
@@ -89,7 +106,7 @@ int main() {
 		    perror("tinysh");
 		    exit(1);
 		  }
-		} else if(pid > 0) {
+		} else if(pid > 0 && background != 0) {
 		  wait(NULL);
 		}
 		free(parsed);