1 /* ----------------------------------------------------------------------- *
3 * Copyright 2003-2008 H. Peter Anvin - All Rights Reserved
5 * Permission is hereby granted, free of charge, to any person
6 * obtaining a copy of this software and associated documentation
7 * files (the "Software"), to deal in the Software without
8 * restriction, including without limitation the rights to use,
9 * copy, modify, merge, publish, distribute, sublicense, and/or
10 * sell copies of the Software, and to permit persons to whom
11 * the Software is furnished to do so, subject to the following
14 * The above copyright notice and this permission notice shall
15 * be included in all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
19 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
20 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
21 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
22 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
23 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
24 * OTHER DEALINGS IN THE SOFTWARE.
26 * ----------------------------------------------------------------------- */
38 * Open an ordinary file
41 extern ssize_t __file_read(struct file_info *, void *, size_t);
42 extern int __file_close(struct file_info *);
44 const struct input_dev __file_dev = {
45 .dev_magic = __DEV_MAGIC,
46 .flags = __DEV_FILE | __DEV_INPUT,
47 .fileflags = O_RDONLY,
49 .close = __file_close,
53 int open(const char *pathname, int flags, ...)
60 fd = opendev(&__file_dev, NULL, flags);
65 fp = &__file_info[fd];
67 lm_pathname = lstrdup(pathname);
71 regs.eax.w[0] = 0x0006;
72 regs.esi.w[0] = OFFS(lm_pathname);
73 regs.es = SEG(lm_pathname);
75 __com32.cs_intcall(0x22, ®s, ®s);
79 if ((regs.eflags.l & EFLAGS_CF) || regs.esi.w[0] == 0) {
87 asm("bsrw %1,%0" : "=r" (blklg2) : "rm" (regs.ecx.w[0]));
88 fp->i.blocklg2 = blklg2;
90 fp->i.length = regs.eax.l;
91 fp->i.filedes = regs.esi.w[0];