5 files changed, 52 insertions, 6 deletions
diff --git a/src/sys/include/compat/unix/syscall.h b/src/sys/include/compat/unix/syscall.h
index be351e8..a031872 100644
--- a/src/sys/include/compat/unix/syscall.h
+++ b/src/sys/include/compat/unix/syscall.h
@@ -68,6 +68,11 @@ scret_t sys_open(struct syscall_args *scargs);
  */
 scret_t sys_read(struct syscall_args *scargs);
 
+/*
+ * Close a file
+ */
+scret_t sys_close(struct syscall_args *scargs);
+
 #ifdef _NEED_UNIX_SCTAB
 scret_t(*g_unix_sctab[])(struct syscall_args *) = {
     [SYS_none]   = NULL,
@@ -83,7 +88,8 @@ scret_t(*g_unix_sctab[])(struct syscall_args *) = {
     [SYS_reboot]  = sys_reboot,
     [SYS_waitpid] = sys_waitpid,
     [SYS_dmsio] = sys_dmsio,
-    [SYS_read] = sys_read
+    [SYS_read] = sys_read,
+    [SYS_close] = sys_close
 };
 
 #endif  /* !_NEED_UNIX_SCTAB */
diff --git a/src/sys/include/os/filedesc.h b/src/sys/include/os/filedesc.h
index 8cdf161..a6a2ac5 100644
--- a/src/sys/include/os/filedesc.h
+++ b/src/sys/include/os/filedesc.h
@@ -39,11 +39,13 @@ struct proc;
  * Represents a file descriptor
  *
  * @fdno: File descriptor index
+ * @off: Current file offset
  * @vp: Vnode this fd is linked with
  * @mode: File attributes
  */
 struct filedesc {
     int fdno;
+    off_t off;
     struct vnode *vp;
     mode_t mode;
 };
@@ -82,6 +84,16 @@ int fdtab_init(struct proc *procp);
 int fd_open(const char *path, mode_t mode);
 
 /*
+ * Close a file
+ *
+ * @fd: File descriptor to close
+ *
+ * Returns zero on success, otherwise a less than
+ * zero value on failure
+ */
+int fd_close(int fd);
+
+/*
  * Write to a file descriptor
  *
  * @fd: File descriptor to write to
diff --git a/src/sys/include/os/vnode.h b/src/sys/include/os/vnode.h
index 868e137..1bef1e2 100644
--- a/src/sys/include/os/vnode.h
+++ b/src/sys/include/os/vnode.h
@@ -72,11 +72,13 @@ struct vop_lookup_args {
  *
  * @data: Buffer containing I/O data
  * @len: Length of buffer
+ * @off: Offset of operation
  * @vp: Current vnode
  */
 struct vop_rw_data {
     void *data;
     size_t len;
+    off_t off;
     struct vnode *vp;
 };
 
@@ -86,6 +88,7 @@ struct vop_rw_data {
  */
 struct vop {
     int(*lookup)(struct vop_lookup_args *args);
+    int(*reclaim)(struct vnode *vp, int flags);
     ssize_t(*write)(struct vop_rw_data *data);
     ssize_t(*read)(struct vop_rw_data *data);
 };
@@ -141,23 +144,36 @@ int vfs_vrel(struct vnode *vp, int flags);
  *
  * @vp: Vnode to write to
  * @data: Data to write
+ * @off: Offset to write at
  * @len: Length of bytes to write
  *
  * Returns the number of bytes written on success, otherwise
  * a less than zero value on failure.
  */
-ssize_t vop_write(struct vnode *vp, char *data, size_t len);
+ssize_t vop_write(struct vnode *vp, char *data, off_t off, size_t len);
 
 /*
  * Wrapper for the read write callback
  *
  * @vp: Vnode to read from
  * @data: Read data written here
+ * @off: Offset to read at
  * @len: Length of bytes to read
  *
  * Returns the number of bytes read on success, otherwise
  * a less than zero value on failure.
  */
-ssize_t vop_read(struct vnode *vp, char *data, size_t len);
+ssize_t vop_read(struct vnode *vp, char *data, off_t off, size_t len);
+
+/*
+ * Reclaim the resources tied to a specific vnode
+ *
+ * @vp: Vnode to reclaim
+ * @flags: Optional flags
+ *
+ * Returns zero on success, otherwise a less than zero value
+ * on failure.
+ */
+int vop_reclaim(struct vnode *vp, int flags);
 
 #endif  /* !_OS_VNODE_H_ */
diff --git a/src/sys/include/sys/proc.h b/src/sys/include/sys/proc.h
index 618ddf3..a547233 100644
--- a/src/sys/include/sys/proc.h
+++ b/src/sys/include/sys/proc.h
@@ -101,6 +101,10 @@ struct proc {
 
 #define PROC_EXITING BIT(0)     /* Process is exiting */
 #define PROC_SLEEPING BIT(1)    /* Process is sleeping */
+#define PROC_KTD BIT(2)         /* Process is kernel thread */
+
+/* Flags for PROC_SPAWN */
+#define SPAWN_KTD BIT(0)        /* Spawn kernel thread */
 
 /*
  * Initialize a process into a basic minimal
@@ -136,6 +140,14 @@ struct proc *proc_self(void);
 int proc_add_range(struct proc *procp, vaddr_t va, paddr_t pa, size_t len);
 
 /*
+ * Spawn a kernel thread
+ *
+ * @procp_res: Result is written here
+ * @fn: Function where kernel thread should end up
+ */
+int proc_ktd(struct proc **procp_res, void(*fn)(void *));
+
+/*
  * Kill a process with a specific status code
  *
  * @procp: Process to kill
@@ -210,8 +222,7 @@ int proc_check_addr(struct proc *proc, uintptr_t addr, size_t len);
  *
  * @proc: Process to put to sleep
  *
- * Returns zero if the address is within the process bounds,
- * otherwise a less than zero value on failure.
+ * Returns zero on success
  */
 int proc_sleep(struct proc *proc);
 
@@ -244,7 +255,7 @@ void md_proc_sleep(void);
  * Put the current process into a halt loop
  * until the next one runs.
  */
-__dead void md_proc_yield(void);
+__dead void md_proc_idle(void);
 
 /*
  * Kick a process into a user context
diff --git a/src/sys/include/sys/syscall.h b/src/sys/include/sys/syscall.h
index 1138029..77b7505 100644
--- a/src/sys/include/sys/syscall.h
+++ b/src/sys/include/sys/syscall.h
@@ -57,6 +57,7 @@
 #define SYS_waitpid     0x0C    /* wait for child to exit */
 #define SYS_dmsio       0x0D    /* DMS I/O */
 #define SYS_read        0x0E    /* read a file descriptor */
+#define SYS_close       0x0F    /* close a file */
 
 typedef __ssize_t scret_t;
 typedef __ssize_t scarg_t;