From 28d9ef04ddaa4cf32f3c63c976afdc535a36db98 Mon Sep 17 00:00:00 2001
From: kaashoek <kaashoek>
Date: Thu, 10 Aug 2006 01:28:57 +0000
Subject: printf convert userfs to use printf bfree ifree writei start on
 unlink

---
 syscall.c | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

(limited to 'syscall.c')

diff --git a/syscall.c b/syscall.c
index eb7ecf3..685fa46 100644
--- a/syscall.c
+++ b/syscall.c
@@ -330,6 +330,30 @@ sys_mknod(void)
   return 0;
 }
 
+int
+sys_unlink(void)
+{
+  struct proc *cp = curproc[cpu()];
+  struct inode *ip;
+  uint arg0;
+
+  if(fetcharg(0, &arg0) < 0)
+    return -1;
+
+  if(checkstring(arg0) < 0)
+    return -1;
+
+  ip = namei(cp->mem + arg0);
+  ip->nlink--;
+  if (ip->nlink <= 0) {
+    panic("sys_link: unimplemented\n");
+  }
+  iupdate(ip);
+  iput(ip);
+
+  return 0;
+}
+
 int
 sys_exec(void)
 {
@@ -561,6 +585,9 @@ syscall(void)
   case SYS_mknod:
     ret = sys_mknod();
     break;
+  case SYS_unlink:
+    ret = sys_unlink();
+    break;
   default:
     cprintf("unknown sys call %d\n", num);
     // XXX fault
-- 
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