1 /* ----------------------------------------------------------------------- * 2 * 3 * Copyright 2003-2008 H. Peter Anvin - All Rights Reserved 4 * 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 12 * conditions: 13 * 14 * The above copyright notice and this permission notice shall 15 * be included in all copies or substantial portions of the Software. 16 * 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. 25 * 26 * ----------------------------------------------------------------------- */ 27 28 #include <errno.h> 29 #include <com32.h> 30 #include <string.h> 31 #include <unistd.h> 32 #include <fcntl.h> 33 #include <fs.h> 34 #include "file.h" 35 36 /* 37 * open.c 38 * 39 * Open an ordinary file 40 */ 41 42 extern ssize_t __file_read(struct file_info *, void *, size_t); 43 extern int __file_close(struct file_info *); 44 45 const struct input_dev __file_dev = { 46 .dev_magic = __DEV_MAGIC, 47 .flags = __DEV_FILE | __DEV_INPUT, 48 .fileflags = O_RDONLY, 49 .read = __file_read, 50 .close = __file_close, 51 .open = NULL, 52 }; 53 54 int open(const char *pathname, int flags, ...) 55 { 56 int fd, handle; 57 struct file_info *fp; 58 59 fd = opendev(&__file_dev, NULL, flags); 60 61 //printf("enter, file = %s, fd = %d\n", pathname, fd); 62 63 if (fd < 0) 64 return -1; 65 66 fp = &__file_info[fd]; 67 68 handle = open_file(pathname, flags, &fp->i.fd); 69 if (handle < 0) { 70 close(fd); 71 errno = ENOENT; 72 return -1; 73 } 74 75 fp->i.offset = 0; 76 fp->i.nbytes = 0; 77 78 return fd; 79 } 80
