From 9936bffa45c928ead9660a0df32d08a50b2b09c2 Mon Sep 17 00:00:00 2001
From: rsc <rsc>
Date: Wed, 6 Sep 2006 18:40:28 +0000
Subject: fd.* -> file.*

---
 fd.c | 150 -------------------------------------------------------------------
 1 file changed, 150 deletions(-)
 delete mode 100644 fd.c

(limited to 'fd.c')

diff --git a/fd.c b/fd.c
deleted file mode 100644
index 9ec3038..0000000
--- a/fd.c
+++ /dev/null
@@ -1,150 +0,0 @@
-#include "types.h"
-#include "stat.h"
-#include "param.h"
-#include "x86.h"
-#include "mmu.h"
-#include "proc.h"
-#include "defs.h"
-#include "fd.h"
-#include "spinlock.h"
-#include "dev.h"
-#include "fs.h"
-#include "fsvar.h"
-
-struct spinlock fd_table_lock;
-struct devsw devsw[NDEV];
-
-struct file file[NFILE];
-
-void
-fd_init(void)
-{
-  initlock(&fd_table_lock, "fd_table");
-}
-
-// Allocate a file descriptor number for curproc.
-int
-fd_ualloc(void)
-{
-  int fd;
-  struct proc *p = curproc[cpu()];
-  for(fd = 0; fd < NOFILE; fd++)
-    if(p->ofile[fd] == 0)
-      return fd;
-  return -1;
-}
-
-// Allocate a file descriptor structure
-struct file*
-fd_alloc(void)
-{
-  int i;
-
-  acquire(&fd_table_lock);
-  for(i = 0; i < NFILE; i++){
-    if(file[i].type == FD_CLOSED){
-      file[i].type = FD_NONE;
-      file[i].ref = 1;
-      release(&fd_table_lock);
-      return file + i;
-    }
-  }
-  release(&fd_table_lock);
-  return 0;
-}
-
-// Write to file descriptor;
-// addr is a kernel address, pointing into some process's p->mem.
-int
-fd_write(struct file *fd, char *addr, int n)
-{
-  if(fd->writable == 0)
-    return -1;
-  if(fd->type == FD_PIPE){
-    return pipe_write(fd->pipe, addr, n);
-  } else if(fd->type == FD_FILE) {
-    ilock(fd->ip);
-    int r = writei(fd->ip, addr, fd->off, n);
-    if(r > 0) {
-      fd->off += r;
-    }
-    iunlock(fd->ip);
-    return r;
-  } else {
-    panic("fd_write");
-    return -1;
-  }
-}
-
-// Read from file descriptor.
-int
-fd_read(struct file *fd, char *addr, int n)
-{
-  if(fd->readable == 0)
-    return -1;
-  if(fd->type == FD_PIPE){
-    return pipe_read(fd->pipe, addr, n);
-  } else if(fd->type == FD_FILE){
-    ilock(fd->ip);
-    int cc = readi(fd->ip, addr, fd->off, n);
-    if(cc > 0)
-      fd->off += cc;
-    iunlock(fd->ip);
-    return cc;
-  } else {
-    panic("fd_read");
-    return -1;
-  }
-}
-
-// Close file descriptor.
-void
-fd_close(struct file *fd)
-{
-  acquire(&fd_table_lock);
-
-  if(fd->ref < 1 || fd->type == FD_CLOSED)
-    panic("fd_close");
-
-  if(--fd->ref == 0){
-    struct file dummy = *fd;
-
-    fd->ref = 0;
-    fd->type = FD_CLOSED;
-    release(&fd_table_lock);
-
-    if(dummy.type == FD_PIPE){
-      pipe_close(dummy.pipe, dummy.writable);
-    } else if(dummy.type == FD_FILE){
-      idecref(dummy.ip);
-    } else {
-      panic("fd_close");
-    }
-  } else {
-    release(&fd_table_lock);
-  }
-}
-
-// Get metadata about file descriptor.
-int
-fd_stat(struct file *fd, struct stat *st)
-{
-  if(fd->type == FD_FILE){
-    ilock(fd->ip);
-    stati(fd->ip, st);
-    iunlock(fd->ip);
-    return 0;
-  } else
-    return -1;
-}
-
-// Increment file descriptor reference count.
-void
-fd_incref(struct file *fd)
-{
-  acquire(&fd_table_lock);
-  if(fd->ref < 1 || fd->type == FD_CLOSED)
-    panic("fd_incref");
-  fd->ref++;
-  release(&fd_table_lock);
-}
-- 
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