Final_1(header)

include/built_in.h

@@ -3,6 +3,9 @@
 
 typedef int (*built_in_command_do)(int, char**);
 typedef int (*built_in_command_validate)(int, char**);
+extern int pid_num;
+//extern int back_num=0;
+extern char running_command[512];
 
 struct built_in_command
 {

include/commands.h

@@ -7,6 +7,8 @@ struct single_command
   char** argv;
 };
 
+extern int running;
+
 int evaluate_command(int n_commands, struct single_command (*commands)[512]);
 
 void free_commands(int n_commands, struct single_command (*commands)[512]);

include/signal_handlers.h

@@ -5,4 +5,5 @@ void catch_sigint(int signalNo);
 
 void catch_sigtstp(int signalNo);
 
+void signal_setting();
 #endif // SIGNAL_H_

test.c

+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+void main(){
+	while(1){
+printf("background\n");
+sleep(5);
+}
+
+}