From 95ef749e393eae8e3ea578fa69f88eaa1987580e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Gustav=20S=C3=B6rn=C3=A4s?= <gustav@sornas.net>
Date: Sun, 14 Mar 2021 14:54:47 +0100
Subject: implement syscalls for lab 6

---
 src/userprog/build/fail |  4 ++++
 src/userprog/syscall.c  | 30 ++++++++++++++++++++++--------
 2 files changed, 26 insertions(+), 8 deletions(-)
 create mode 100644 src/userprog/build/fail

(limited to 'src/userprog')

diff --git a/src/userprog/build/fail b/src/userprog/build/fail
new file mode 100644
index 0000000..d6016ef
--- /dev/null
+++ b/src/userprog/build/fail
@@ -0,0 +1,4 @@
+FAIL tests/filesys/base/lg-random
+FAIL tests/filesys/base/sm-random
+FAIL tests/filesys/base/syn-remove
+FAIL tests/filesys/base/syn-write
diff --git a/src/userprog/syscall.c b/src/userprog/syscall.c
index 8bdb42b..b9acb17 100644
--- a/src/userprog/syscall.c
+++ b/src/userprog/syscall.c
@@ -38,7 +38,7 @@ create (const char *filename, off_t initial_size)
 static bool
 remove (const char *filename)
 {
-  return false;
+  return filesys_remove (filename);
 }
 
 static int
@@ -66,12 +66,6 @@ open (const char *filename)
   return -1;
 }
 
-static int
-filesize (int fd_i)
-{
-  return 0;
-}
-
 static struct file **
 get_fd (struct thread *thread, int fd_i)
 {
@@ -158,15 +152,35 @@ write (int fd_i, const void *buf, unsigned size)
   }
 }
 
+static int
+filesize (int fd_i)
+{
+  struct thread *thread = thread_current ();
+  struct file **fd = get_fd (thread, fd_i);
+  if (fd && *fd) {
+    return file_length (*fd);
+  }
+  return -1;
+}
+
 static void
 seek (int fd_i, unsigned position)
 {
-  return;
+  struct thread *thread = thread_current ();
+  struct file **fd = get_fd (thread, fd_i);
+  if (fd && *fd) {
+    file_seek (*fd, position);
+  }
 }
 
 static unsigned
 tell (int fd_i)
 {
+  struct thread *thread = thread_current ();
+  struct file **fd = get_fd (thread, fd_i);
+  if (fd && *fd) {
+    return file_tell (*fd);
+  }
   return 0;
 }
 
-- 
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