7 files changed, 86 insertions, 2 deletions
diff --git a/src/sys/include/compat/unix/syscall.h b/src/sys/include/compat/unix/syscall.h
index a031872..42dc4c0 100644
--- a/src/sys/include/compat/unix/syscall.h
+++ b/src/sys/include/compat/unix/syscall.h
@@ -73,6 +73,11 @@ scret_t sys_read(struct syscall_args *scargs);
  */
 scret_t sys_close(struct syscall_args *scargs);
 
+/*
+ * Seek a file descriptor
+ */
+scret_t sys_lseek(struct syscall_args *scargs);
+
 #ifdef _NEED_UNIX_SCTAB
 scret_t(*g_unix_sctab[])(struct syscall_args *) = {
     [SYS_none]   = NULL,
@@ -89,7 +94,8 @@ scret_t(*g_unix_sctab[])(struct syscall_args *) = {
     [SYS_waitpid] = sys_waitpid,
     [SYS_dmsio] = sys_dmsio,
     [SYS_read] = sys_read,
-    [SYS_close] = sys_close
+    [SYS_close] = sys_close,
+    [SYS_lseek] = sys_lseek
 };
 
 #endif  /* !_NEED_UNIX_SCTAB */
diff --git a/src/sys/include/os/filedesc.h b/src/sys/include/os/filedesc.h
index a6a2ac5..b773de9 100644
--- a/src/sys/include/os/filedesc.h
+++ b/src/sys/include/os/filedesc.h
@@ -30,6 +30,7 @@
 #ifndef _OS_FILEDESC_H_
 #define _OS_FILEDESC_H_ 1
 
+#include <sys/seek.h>
 #include <sys/types.h>
 #include <os/vnode.h>
 
@@ -117,4 +118,13 @@ ssize_t write(int fd, const void *buf, size_t count);
  */
 ssize_t read(int fd, void *buf, size_t count);
 
+/*
+ * Reposition the file offset of a file
+ *
+ * @fd: File descriptor to reposition
+ * @offset: Offset to move `fd' to
+ * @whence: How it should be repositioned
+ */
+off_t lseek(int fd, off_t offset, int whence);
+
 #endif  /* !_OS_FILEDESC_H_ */
diff --git a/src/sys/include/os/kalloc.h b/src/sys/include/os/kalloc.h
index 143c4f9..aaaaa74 100644
--- a/src/sys/include/os/kalloc.h
+++ b/src/sys/include/os/kalloc.h
@@ -48,6 +48,14 @@
 void *kalloc(size_t sz);
 
 /*
+ * Reallocates memory pool created by `dynalloc()'
+ *
+ * @old_ptr: Pointer to old pool.
+ * @newsize: Size of new pool.
+ */
+void *krealloc(void *old_ptr, size_t newsize);
+
+/*
  * Free a chunk of memory given to by
  * `ptr'
  *
diff --git a/src/sys/include/os/vnode.h b/src/sys/include/os/vnode.h
index 628ba68..77cadb2 100644
--- a/src/sys/include/os/vnode.h
+++ b/src/sys/include/os/vnode.h
@@ -94,10 +94,20 @@ struct vop_create_args {
 };
 
 /*
+ * Represents attributes of a vnode
+ *
+ * @size: File size in bytes
+ */
+struct vattr {
+    size_t size;
+};
+
+/*
  * Represents operations that can be performed on
  * a specific vnode. These are implemented as callbacks
  */
 struct vop {
+    int(*getattr)(struct vnode *vp, struct vattr *res);
     int(*lookup)(struct vop_lookup_args *args);
     int(*reclaim)(struct vnode *vp, int flags);
     int(*create)(struct vop_create_args *args);
@@ -200,4 +210,15 @@ int vop_reclaim(struct vnode *vp, int flags);
  */
 int vop_create(struct vnode *vp, struct nameidata *ndp);
 
+/*
+ * Get the attributes of a file
+ *
+ * @vp: Vnode of file to get attributes of
+ * @res: Result of file to get attr of
+ *
+ * Returns zero on success, otherwise a less than
+ * zero value on failure
+ */
+int vop_getattr(struct vnode *vp, struct vattr *res);
+
 #endif  /* !_OS_VNODE_H_ */
diff --git a/src/sys/include/sys/mount.h b/src/sys/include/sys/mount.h
index 4a190a4..5f6fa6b 100644
--- a/src/sys/include/sys/mount.h
+++ b/src/sys/include/sys/mount.h
@@ -42,6 +42,7 @@
  */
 #define MOUNT_INITRD "initrd"   /* Initial ramdisk */
 #define MOUNT_DEVFS  "devfs"    /* Device filesystem */
+#define MOUNT_TMPFS  "tmpfs"    /* Temporary filesystem */
 
 /*
  * The mount system call
@@ -66,6 +67,7 @@ struct mount;
 /* Filesystem vfsops */
 extern struct vfsops g_omar_vfsops;
 extern struct vfsops g_devfs_vfsops;
+extern struct vfsops g_tmpfs_vfsops;
 
 /*
  * Represents a mountpoint
@@ -133,7 +135,6 @@ struct fs_info {
  */
 #define FS_ATTR_IMAGE BIT(0)    /* Is an image kind e.g., OSMORA OMAR */
 
-
 /*
  * VFS operations vector
  *
diff --git a/src/sys/include/sys/seek.h b/src/sys/include/sys/seek.h
new file mode 100644
index 0000000..1edc50b
--- /dev/null
+++ b/src/sys/include/sys/seek.h
@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2025 Ian Marco Moffett and L5 engineers
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the project nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _SYS_SEEK_H_
+#define _SYS_SEEK_H_ 1
+
+#define SEEK_SET 0
+#define SEEK_CUR 1
+#define SEEK_END 2
+
+#endif  /* !_SYS_SEEK_H_ */
diff --git a/src/sys/include/sys/syscall.h b/src/sys/include/sys/syscall.h
index 77b7505..c97d5ea 100644
--- a/src/sys/include/sys/syscall.h
+++ b/src/sys/include/sys/syscall.h
@@ -58,6 +58,7 @@
 #define SYS_dmsio       0x0D    /* DMS I/O */
 #define SYS_read        0x0E    /* read a file descriptor */
 #define SYS_close       0x0F    /* close a file */
+#define SYS_lseek       0x10    /* seek to end of file */
 
 typedef __ssize_t scret_t;
 typedef __ssize_t scarg_t;