Add user.h for prototypes.

Add cons_puts for cleaner output.

ulib.c

@@ -1,5 +1,13 @@
+#include "user.h"
+
 int
 puts(char *s)
+{
+  return cons_puts(s);
+}
+
+int
+puts1(char *s)
 {
   int i;
 

user.h

@@ -0,0 +1,15 @@
+int fork(void);
+int exit(void) __attribute__((noreturn));
+int wait(void);
+int cons_putc(int);
+int pipe(int*);
+int write(int, void*, int);
+int read(int, void*, int);
+int close(int);
+int block(void);
+int kill(int);
+int panic(char*);
+int cons_puts(char*);
+
+int puts(char*);
+int puts1(char*);

user1.c

@@ -1,5 +1,8 @@
+#include "user.h"
+
 char buf[32];
 
+int
 main()
 {
   int pid, fds[2], n;
@@ -15,6 +18,5 @@ main()
     puts(buf);
     puts("\n");
   }
-  while(1)
-    ;
+  for(;;);
 }

userfs.c

@@ -1,9 +1,13 @@
+#include "user.h"
+
 // file system tests
 
 char buf[1024];
 
+int
 main()
 {
   puts("userfs running\n");
   block();
+  return 0;
 }

usertests.c

@@ -1,3 +1,5 @@
+#include "user.h"
+
 char buf[2048];
 
 // simple fork and pipe read/write
@@ -17,10 +19,10 @@ pipe1()
         buf[i] = seq++;
       if(write(fds[1], buf, 1033) != 1033){
         panic("pipe1 oops 1\n");
-        exit(1);
+        exit();
       }
     }
-    exit(0);
+    exit();
   } else {
     close(fds[1]);
     total = 0;
@@ -109,12 +111,13 @@ exitwait()
         return;
       }
     } else {
-      exit(0);
+      exit();
     }
   }
   puts("exitwait ok\n");
 }
 
+int
 main()
 {
   puts("usertests starting\n");
@@ -123,5 +126,6 @@ main()
   preempt();
   exitwait();
 
-  panic("usertests finished successfuly");
+  panic("usertests succeeded");
+  return 0;
 }

usys.S

@@ -19,3 +19,4 @@ STUB(close)
 STUB(block)
 STUB(kill)
 STUB(panic)
+STUB(cons_puts)