about summary refs log tree commit diff
path: root/libio/iofopncook.c
diff options
context:
space:
mode:
Diffstat (limited to 'libio/iofopncook.c')
-rw-r--r--libio/iofopncook.c34
1 files changed, 29 insertions, 5 deletions
diff --git a/libio/iofopncook.c b/libio/iofopncook.c
index 321eb67b8d..976ff5093a 100644
--- a/libio/iofopncook.c
+++ b/libio/iofopncook.c
@@ -1,4 +1,5 @@
-/* Copyright (C) 1993,95,97,99,2000,2002,2004 Free Software Foundation, Inc.
+/* Copyright (C) 1993,95,97,99,2000,2002,2004, 2005
+   Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -36,6 +37,8 @@ static _IO_ssize_t _IO_cookie_read (register _IO_FILE* fp, void* buf,
 static _IO_ssize_t _IO_cookie_write (register _IO_FILE* fp,
 				     const void* buf, _IO_ssize_t size);
 static _IO_off64_t _IO_cookie_seek (_IO_FILE *fp, _IO_off64_t offset, int dir);
+static _IO_off64_t _IO_cookie_seekoff (_IO_FILE *fp, _IO_off64_t offset,
+				       int dir, int mode);
 static int _IO_cookie_close (_IO_FILE* fp);
 
 static _IO_ssize_t
@@ -61,9 +64,16 @@ _IO_cookie_write (fp, buf, size)
   struct _IO_cookie_file *cfile = (struct _IO_cookie_file *) fp;
 
   if (cfile->__io_functions.write == NULL)
-    return -1;
+    {
+      fp->_flags |= _IO_ERR_SEEN;
+      return 0;
+    }
+
+  _IO_ssize_t n = cfile->__io_functions.write (cfile->__cookie, buf, size);
+  if (n < size)
+    fp->_flags |= _IO_ERR_SEEN;
 
-  return cfile->__io_functions.write (cfile->__cookie, buf, size);
+  return n;
 }
 
 static _IO_off64_t
@@ -94,6 +104,20 @@ _IO_cookie_close (fp)
 }
 
 
+static _IO_off64_t
+_IO_cookie_seekoff (fp, offset, dir, mode)
+     _IO_FILE *fp;
+     _IO_off64_t offset;
+     int dir;
+     int mode;
+{
+  /* We must force the fileops code to always use seek to determine
+     the position.  */
+  fp->_offset = _IO_pos_BAD;
+  return INTUSE(_IO_file_seekoff) (fp, offset, dir, mode);
+}
+
+
 static const struct _IO_jump_t _IO_cookie_jumps = {
   JUMP_INIT_DUMMY,
   JUMP_INIT(finish, INTUSE(_IO_file_finish)),
@@ -103,7 +127,7 @@ static const struct _IO_jump_t _IO_cookie_jumps = {
   JUMP_INIT(pbackfail, INTUSE(_IO_default_pbackfail)),
   JUMP_INIT(xsputn, INTUSE(_IO_file_xsputn)),
   JUMP_INIT(xsgetn, INTUSE(_IO_default_xsgetn)),
-  JUMP_INIT(seekoff, INTUSE(_IO_file_seekoff)),
+  JUMP_INIT(seekoff, _IO_cookie_seekoff),
   JUMP_INIT(seekpos, _IO_default_seekpos),
   JUMP_INIT(setbuf, INTUSE(_IO_file_setbuf)),
   JUMP_INIT(sync, INTUSE(_IO_file_sync)),
@@ -223,7 +247,7 @@ static const struct _IO_jump_t _IO_old_cookie_jumps = {
   JUMP_INIT(pbackfail, INTUSE(_IO_default_pbackfail)),
   JUMP_INIT(xsputn, INTUSE(_IO_file_xsputn)),
   JUMP_INIT(xsgetn, INTUSE(_IO_default_xsgetn)),
-  JUMP_INIT(seekoff, INTUSE(_IO_file_seekoff)),
+  JUMP_INIT(seekoff, _IO_cookie_seekoff),
   JUMP_INIT(seekpos, _IO_default_seekpos),
   JUMP_INIT(setbuf, INTUSE(_IO_file_setbuf)),
   JUMP_INIT(sync, INTUSE(_IO_file_sync)),