system call return values

initialize 2nd cpu's idt

1 files changed, 10 insertions, 4 deletions

diff --git a/user1.c b/user1.c
index ea260a2..9e0c731 100644
--- a/user1.c
+++ b/user1.c
@@ -1,4 +1,4 @@
-void
+int
 fork()
 {
   asm("mov $1, %eax");
@@ -12,19 +12,25 @@ cons_putc(int c)
   asm("int $48");
 }
 
-void
+int
 puts(char *s)
 {
   int i;
 
   for(i = 0; s[i]; i++)
     cons_putc(s[i]);
+  return i;
 }
 
 main()
 {
-  // fork();
-  puts("hello!\n");
+  int pid;
+  pid = fork();
+  if(pid == 0){
+    cons_putc('C');
+  } else {
+    cons_putc('P');
+  }
   while(1)
     ;
 }