Very basic operations now work; need to handle line-oriented

versus character-oriented input

1 files changed, 32 insertions, 19 deletions

diff --git a/com32/lib/sys/open.c b/com32/lib/sys/open.c
index 3f84e5f7..27c22cec 100644
--- a/com32/lib/sys/open.c
+++ b/com32/lib/sys/open.c
@@ -1,7 +1,7 @@
 #ident "$Id$"
 /* ----------------------------------------------------------------------- *
  *   
- *   Copyright 2003 H. Peter Anvin - All Rights Reserved
+ *   Copyright 2003-2004 H. Peter Anvin - All Rights Reserved
  *
  *   Permission is hereby granted, free of charge, to any person
  *   obtaining a copy of this software and associated documentation
@@ -29,27 +29,40 @@
 #include <errno.h>
 #include <com32.h>
 #include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
 #include "file.h"
 
-int open(const char *pathname, int flags, mode_t mode)
+/*
+ * open.c
+ *
+ * Open an ordinary file
+ */
+
+extern ssize_t __file_read(struct file_info *, void *, size_t);
+extern int __file_close(struct file_info *);
+
+static const struct dev_info file_dev = {
+  .dev_magic = __DEV_MAGIC,
+  .flags     = __DEV_FILE,
+  .fileflags = O_RDONLY,
+  .read      = __file_read,
+  .write     = NULL,		/* File writes are not supported */
+  .close     = __file_close,
+};
+
+int open(const char *pathname, int flags, ...)
 {
   com32sys_t regs;
   int fd;
   struct file_info *fp;
-  
-  if ( flags ) {
-    errno = EINVAL;
-    return -1;
-  }
 
-  for ( fd = 0, fp = __file_info ; fd < NFILES ; fd++, fp++ )
-    if ( fp->blocklg2 == 0 )
-      break;
+  fd = opendev(&file_dev, flags);
 
-  if ( fd >= NFILES ) {
-    errno = EMFILE;
+  if ( fd < 0 )
     return -1;
-  }
+  
+  fp = &__file_info[fd];
 
   strlcpy(__com32.cs_bounce, pathname, __com32.cs_bounce_size);
 
@@ -67,13 +80,13 @@ int open(const char *pathname, int flags, mode_t mode)
   {
     uint16_t blklg2;
     asm("bsrw %1,%0" : "=r" (blklg2) : "rm" (regs.ecx.w[0]));
-    fp->blocklg2 = blklg2;
+    fp->p.f.blocklg2 = blklg2;
   }
-  fp->length    = regs.eax.l;
-  fp->filedes   = regs.esi.w[0];
-  fp->offset    = 0;
-  fp->nbytes    = 0;
-  fp->datap     = fp->buf;
+  fp->p.f.length    = regs.eax.l;
+  fp->p.f.filedes   = regs.esi.w[0];
+  fp->p.f.offset    = 0;
+  fp->p.f.nbytes    = 0;
+  fp->p.f.datap     = fp->p.f.buf;
 
   return fd;
 }