3 files changed, 74 insertions, 0 deletions
diff --git a/src/sys/os/os_filedes.c b/src/sys/os/os_filedes.c
index ca56fc3..36748a6 100644
--- a/src/sys/os/os_filedes.c
+++ b/src/sys/os/os_filedes.c
@@ -359,6 +359,44 @@ read(int fd, void *buf, size_t count)
     return retval;
 }
 
+off_t
+lseek(int fd, off_t offset, int whence)
+{
+    struct filedesc *fdp;
+    struct proc *self = proc_self();
+    struct vattr attr;
+    int error;
+
+    if (fd < 0) {
+        return -EBADF;
+    }
+
+    fdp = fd_get(self, fd);
+    if (fdp == NULL) {
+        return -EBADF;
+    }
+
+    /* Could not get vnode attributes */
+    error = vop_getattr(fdp->vp, &attr);
+    if (error < 0) {
+        return 0;
+    }
+
+    switch (whence) {
+    case SEEK_SET:
+        fdp->off = offset;
+        break;
+    case SEEK_CUR:
+        fdp->off += offset;
+        break;
+    case SEEK_END:
+        fdp->off = attr.size;
+        break;
+    }
+
+    return fdp->off;
+}
+
 /*
  * ARG0: Path
  * ARG1: Mode
@@ -378,3 +416,18 @@ sys_open(struct syscall_args *scargs)
 
     return fd_open(pathbuf, mode);
 }
+
+/*
+ * ARG0: Fd
+ * ARG1: Offset
+ * ARG2: Whence
+ */
+scret_t
+sys_lseek(struct syscall_args *scargs)
+{
+    int fd = SCARG(scargs, int, 0);
+    off_t off = SCARG(scargs, off_t, 1);
+    int whence = SCARG(scargs, int, 2);
+
+    return lseek(fd, off, whence);
+}
diff --git a/src/sys/os/vfs_namei.c b/src/sys/os/vfs_namei.c
index d417db8..7814181 100644
--- a/src/sys/os/vfs_namei.c
+++ b/src/sys/os/vfs_namei.c
@@ -149,6 +149,7 @@ namei(struct nameidata *ndp)
 
             nd_create.path = namebuf;
             create.ndp = &nd_create;
+            create.vtype = VTYPE_FILE;
             error = vops->create(&create);
             if (error < 0)
                 return error;
diff --git a/src/sys/os/vfs_subr.c b/src/sys/os/vfs_subr.c
index adfcffb..2ae18af 100644
--- a/src/sys/os/vfs_subr.c
+++ b/src/sys/os/vfs_subr.c
@@ -246,3 +246,23 @@ vop_create(struct vnode *vp, struct nameidata *ndp)
     args.ndp = ndp;
     return vops->create(&args);
 }
+
+int
+vop_getattr(struct vnode *vp, struct vattr *res)
+{
+    struct vop *vops;
+
+    if (vp == NULL || res == NULL) {
+        return -EINVAL;
+    }
+
+    if ((vops = vp->vops) == NULL) {
+        return -EIO;
+    }
+
+    if (vops->getattr == NULL) {
+        return -EIO;
+    }
+
+    return vops->getattr(vp, res);
+}