diff --git a/defs.h b/defs.h
index 1491a8e..e05782d 100644
--- a/defs.h
+++ b/defs.h
@@ -92,14 +92,14 @@ int pipe_read(struct pipe*, char*, int);
 
 // fd.c
 struct stat;
-void fd_init(void);
-int fd_ualloc(void);
-struct file* fd_alloc(void);
-void fd_close(struct file*);
-int fd_read(struct file*, char*, int n);
-int fd_write(struct file*, char*, int n);
-int fd_stat(struct file*, struct stat*);
-void fd_incref(struct file*);
+void fileinit(void);
+int fdalloc(void);
+struct file* filealloc(void);
+void fileclose(struct file*);
+int fileread(struct file*, char*, int n);
+int filewrite(struct file*, char*, int n);
+int filestat(struct file*, struct stat*);
+void fileincref(struct file*);
 
 // ide.c
 void ide_init(void);
diff --git a/file.c b/file.c
index fd04383..29f07cc 100644
--- a/file.c
+++ b/file.c
@@ -17,14 +17,14 @@ struct devsw devsw[NDEV];
 struct file file[NFILE];
 
 void
-fd_init(void)
+fileinit(void)
 {
   initlock(&fd_table_lock, "fd_table");
 }
 
 // Allocate a file descriptor number for curproc.
 int
-fd_ualloc(void)
+fdalloc(void)
 {
   int fd;
   struct proc *p = curproc[cpu()];
@@ -36,7 +36,7 @@ fd_ualloc(void)
 
 // Allocate a file descriptor structure
 struct file*
-fd_alloc(void)
+filealloc(void)
 {
   int i;
 
@@ -56,7 +56,7 @@ fd_alloc(void)
 // 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)
+filewrite(struct file *fd, char *addr, int n)
 {
   if(fd->writable == 0)
     return -1;
@@ -71,14 +71,14 @@ fd_write(struct file *fd, char *addr, int n)
     iunlock(fd->ip);
     return r;
   } else {
-    panic("fd_write");
+    panic("filewrite");
     return -1;
   }
 }
 
 // Read from file descriptor.
 int
-fd_read(struct file *fd, char *addr, int n)
+fileread(struct file *fd, char *addr, int n)
 {
   if(fd->readable == 0)
     return -1;
@@ -92,19 +92,19 @@ fd_read(struct file *fd, char *addr, int n)
     iunlock(fd->ip);
     return cc;
   } else {
-    panic("fd_read");
+    panic("fileread");
     return -1;
   }
 }
 
 // Close file descriptor.
 void
-fd_close(struct file *fd)
+fileclose(struct file *fd)
 {
   acquire(&fd_table_lock);
 
   if(fd->ref < 1 || fd->type == FD_CLOSED)
-    panic("fd_close");
+    panic("fileclose");
 
   if(--fd->ref == 0){
     struct file dummy = *fd;
@@ -118,7 +118,7 @@ fd_close(struct file *fd)
     } else if(dummy.type == FD_FILE){
       idecref(dummy.ip);
     } else {
-      panic("fd_close");
+      panic("fileclose");
     }
   } else {
     release(&fd_table_lock);
@@ -127,7 +127,7 @@ fd_close(struct file *fd)
 
 // Get metadata about file descriptor.
 int
-fd_stat(struct file *fd, struct stat *st)
+filestat(struct file *fd, struct stat *st)
 {
   if(fd->type == FD_FILE){
     ilock(fd->ip);
@@ -140,11 +140,11 @@ fd_stat(struct file *fd, struct stat *st)
 
 // Increment file descriptor reference count.
 void
-fd_incref(struct file *fd)
+fileincref(struct file *fd)
 {
   acquire(&fd_table_lock);
   if(fd->ref < 1 || fd->type == FD_CLOSED)
-    panic("fd_incref");
+    panic("fileincref");
   fd->ref++;
   release(&fd_table_lock);
 }
diff --git a/main.c b/main.c
index f6a8ab9..dba8bdd 100644
--- a/main.c
+++ b/main.c
@@ -49,7 +49,7 @@ main0(void)
   kinit(); // physical memory allocator
   tvinit(); // trap vectors
   idtinit(); // this CPU's interrupt descriptor table
-  fd_init();
+  fileinit();
   iinit(); // i-node table
 
   // initialize process 0
diff --git a/pipe.c b/pipe.c
index 3b2f6b8..82eaeeb 100644
--- a/pipe.c
+++ b/pipe.c
@@ -24,9 +24,9 @@ pipe_alloc(struct file **fd1, struct file **fd2)
   *fd1 = *fd2 = 0;
   struct pipe *p = 0;
 
-  if((*fd1 = fd_alloc()) == 0)
+  if((*fd1 = filealloc()) == 0)
     goto oops;
-  if((*fd2 = fd_alloc()) == 0)
+  if((*fd2 = filealloc()) == 0)
     goto oops;
   if((p = (struct pipe*) kalloc(PAGE)) == 0)
     goto oops;
@@ -49,11 +49,11 @@ pipe_alloc(struct file **fd1, struct file **fd2)
     kfree((char*) p, PAGE);
   if(*fd1){
     (*fd1)->type = FD_NONE;
-    fd_close(*fd1);
+    fileclose(*fd1);
   }
   if(*fd2){
     (*fd2)->type = FD_NONE;
-    fd_close(*fd2);
+    fileclose(*fd2);
   }
   return -1;
 }
diff --git a/proc.c b/proc.c
index 34b353b..8aa1ff1 100644
--- a/proc.c
+++ b/proc.c
@@ -127,7 +127,7 @@ copyproc(struct proc *p)
   for(i = 0; i < NOFILE; i++){
     np->ofile[i] = p->ofile[i];
     if(np->ofile[i])
-      fd_incref(np->ofile[i]);
+      fileincref(np->ofile[i]);
   }
 
   np->cwd = p->cwd;
@@ -329,7 +329,7 @@ proc_exit(void)
   // Close all open files.
   for(fd = 0; fd < NOFILE; fd++){
     if(cp->ofile[fd]){
-      fd_close(cp->ofile[fd]);
+      fileclose(cp->ofile[fd]);
       cp->ofile[fd] = 0;
     }
   }
diff --git a/sysfile.c b/sysfile.c
index d0c7afa..ea75a41 100644
--- a/sysfile.c
+++ b/sysfile.c
@@ -25,10 +25,10 @@ sys_pipe(void)
 
   if(pipe_alloc(&rfd, &wfd) < 0)
     goto oops;
-  if((f1 = fd_ualloc()) < 0)
+  if((f1 = fdalloc()) < 0)
     goto oops;
   p->ofile[f1] = rfd;
-  if((f2 = fd_ualloc()) < 0)
+  if((f2 = fdalloc()) < 0)
     goto oops;
   p->ofile[f2] = wfd;
   if(fetcharg(0, &fdp) < 0)
@@ -41,9 +41,9 @@ sys_pipe(void)
 
  oops:
   if(rfd)
-    fd_close(rfd);
+    fileclose(rfd);
   if(wfd)
-    fd_close(wfd);
+    fileclose(wfd);
   if(f1 >= 0)
     p->ofile[f1] = 0;
   if(f2 >= 0)
@@ -67,7 +67,7 @@ sys_write(void)
   if(addr + n > p->sz)
     return -1;
 
-  ret = fd_write(p->ofile[fd], p->mem + addr, n);
+  ret = filewrite(p->ofile[fd], p->mem + addr, n);
   return ret;
 }
 
@@ -86,7 +86,7 @@ sys_read(void)
     return -1;
   if(addr + n > p->sz)
     return -1;
-  ret = fd_read(p->ofile[fd], p->mem + addr, n);
+  ret = fileread(p->ofile[fd], p->mem + addr, n);
   return ret;
 }
 
@@ -102,7 +102,7 @@ sys_close(void)
     return -1;
   if(p->ofile[fd] == 0)
     return -1;
-  fd_close(p->ofile[fd]);
+  fileclose(p->ofile[fd]);
   p->ofile[fd] = 0;
   return 0;
 }
@@ -146,13 +146,13 @@ sys_open(void)
     return -1;
   }
 
-  if((fd = fd_alloc()) == 0){
+  if((fd = filealloc()) == 0){
     iput(ip);
     return -1;
   }
-  if((ufd = fd_ualloc()) < 0){
+  if((ufd = fdalloc()) < 0){
     iput(ip);
-    fd_close(fd);
+    fileclose(fd);
     return -1;
   }
 
@@ -310,7 +310,7 @@ sys_fstat(void)
     return -1;
   if(addr + sizeof(struct stat) > cp->sz)
     return -1;
-  r = fd_stat(cp->ofile[fd], (struct stat*)(cp->mem + addr));
+  r = filestat(cp->ofile[fd], (struct stat*)(cp->mem + addr));
   return r;
 }
 
@@ -326,10 +326,10 @@ sys_dup(void)
     return -1;
   if(cp->ofile[fd] == 0)
     return -1;
-  if((ufd1 = fd_ualloc()) < 0)
+  if((ufd1 = fdalloc()) < 0)
     return -1;
   cp->ofile[ufd1] = cp->ofile[fd];
-  fd_incref(cp->ofile[ufd1]);
+  fileincref(cp->ofile[ufd1]);
   return ufd1;
 }