1 #ident "$Id: open.c,v 1.4 2004/11/23 23:43:02 hpa Exp $"
2 /* ----------------------------------------------------------------------- *
4 * Copyright 2003-2004 H. Peter Anvin - All Rights Reserved
6 * Permission is hereby granted, free of charge, to any person
7 * obtaining a copy of this software and associated documentation
8 * files (the "Software"), to deal in the Software without
9 * restriction, including without limitation the rights to use,
10 * copy, modify, merge, publish, distribute, sublicense, and/or
11 * sell copies of the Software, and to permit persons to whom
12 * the Software is furnished to do so, subject to the following
15 * The above copyright notice and this permission notice shall
16 * be included in all copies or substantial portions of the Software.
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
19 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
20 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
21 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
22 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
23 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
24 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
25 * OTHER DEALINGS IN THE SOFTWARE.
27 * ----------------------------------------------------------------------- */
39 * Open an ordinary file
42 extern ssize_t __file_read(struct file_info *, void *, size_t);
43 extern int __file_close(struct file_info *);
45 static const struct input_dev file_dev = {
46 .dev_magic = __DEV_MAGIC,
47 .flags = __DEV_FILE | __DEV_INPUT,
48 .fileflags = O_RDONLY,
50 .close = __file_close,
53 int open(const char *pathname, int flags, ...)
59 fd = opendev(&file_dev, NULL, flags);
64 fp = &__file_info[fd];
66 strlcpy(__com32.cs_bounce, pathname, __com32.cs_bounce_size);
68 regs.eax.w[0] = 0x0006;
69 regs.esi.w[0] = OFFS(__com32.cs_bounce);
70 regs.es = SEG(__com32.cs_bounce);
72 __com32.cs_intcall(0x22, ®s, ®s);
74 if ( (regs.eflags.l & EFLAGS_CF) || regs.esi.w[0] == 0 ) {
81 asm("bsrw %1,%0" : "=r" (blklg2) : "rm" (regs.ecx.w[0]));
82 fp->i.blocklg2 = blklg2;
84 fp->i.length = regs.eax.l;
85 fp->i.filedes = regs.esi.w[0];