-

fun_1.c

@@ -7,13 +7,12 @@
 #include "mytop.c"
 //#include "fun.h"
 
-
 void eval(char *cmdline)
 {
     char *argv[MAXLINE];
     char buf[MAXLINE];
     int isBg;
-    int pid;
+    pid_t pid;
     strcpy(buf,cmdline);
     isBg = parseline(cmdline,argv);
     if(argv[0] == NULL)

fun_2.c

@@ -160,7 +160,7 @@ if(Isopen == '>')
 int Is_redirect(char **argv)
 {
     int i = 0;
-    char Isopen = NULL;
+    char Isopen = '0';
     char *cmd_0[MAXLINE];
     char *cmd_1[MAXLINE];
     while (argv[i]!=NULL)
@@ -175,7 +175,7 @@ int Is_redirect(char **argv)
         }
         i++;
     }
-    if(Isopen == NULL)
+    if(Isopen == '0')
     {
         return 0;
     }

main.c

@@ -1,19 +1,28 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include "fun.h"
-
+pid_t main_proc_pid;
+void sigint_handler() 
+{/*
+    pid_t pid = getpid();
+    if(pid != main_proc_pid)
+    {
+        exit(0);
+    }*/
+}
 
 int main()
 {
     char cmdline[MAXLINE];
+    main_proc_pid = getpid();
+    signal(SIGINT, sigint_handler);
 
     while(1)
     {
-        int bufsize = MAXLINE;
         printf("COMMAND->");
         fgets(cmdline, MAXLINE, stdin);    
         eval(cmdline);
         history(cmdline);
     }
     return 0;
-}
+}

mytop.c

@@ -1,4 +1,4 @@
-
+/*
 #define mytop_h
 #include <stdio.h>
 #include <unistd.h>
@@ -399,4 +399,6 @@ int mytop(){
     //fflush(NULL);
     
     return 0;
-}
+}
+*/
+int mytop(){}