Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1663 | pj | 1 | /* |
| 2 | * Project: S.Ha.R.K. |
||
| 3 | * |
||
| 4 | * Coordinators: |
||
| 5 | * Giorgio Buttazzo <giorgio@sssup.it> |
||
| 6 | * Paolo Gai <pj@gandalf.sssup.it> |
||
| 7 | * |
||
| 8 | * Authors : |
||
| 9 | * Paolo Gai <pj@gandalf.sssup.it> |
||
| 10 | * (see the web pages for full authors list) |
||
| 11 | * |
||
| 12 | * ReTiS Lab (Scuola Superiore S.Anna - Pisa - Italy) |
||
| 13 | * |
||
| 14 | * http://www.sssup.it |
||
| 15 | * http://retis.sssup.it |
||
| 16 | * http://shark.sssup.it |
||
| 17 | */ |
||
| 18 | |||
| 19 | /** |
||
| 20 | ------------ |
||
| 21 | CVS : $Id: dosfs.c,v 1.1 2004-07-05 14:18:03 pj Exp $ |
||
| 22 | |||
| 23 | File: $File$ |
||
| 24 | Revision: $Revision: 1.1 $ |
||
| 25 | Last update: $Date: 2004-07-05 14:18:03 $ |
||
| 26 | ------------ |
||
| 27 | **/ |
||
| 28 | |||
| 29 | /* |
||
| 30 | * Copyright (C) 2001 Paolo Gai |
||
| 31 | * |
||
| 32 | * This program is free software; you can redistribute it and/or modify |
||
| 33 | * it under the terms of the GNU General Public License as published by |
||
| 34 | * the Free Software Foundation; either version 2 of the License, or |
||
| 35 | * (at your option) any later version. |
||
| 36 | * |
||
| 37 | * This program is distributed in the hope that it will be useful, |
||
| 38 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
||
| 39 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
||
| 40 | * GNU General Public License for more details. |
||
| 41 | * |
||
| 42 | * You should have received a copy of the GNU General Public License |
||
| 43 | * along with this program; if not, write to the Free Software |
||
| 44 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
||
| 45 | * |
||
| 46 | */ |
||
| 47 | |||
| 48 | #include "kernel/kern.h" |
||
| 49 | #include "string.h" |
||
| 50 | #include "ll/i386/x-dos.h" |
||
| 51 | |||
| 52 | /* |
||
| 53 | * |
||
| 54 | * Read/Write functions |
||
| 55 | * |
||
| 56 | */ |
||
| 57 | |||
| 58 | /* This is the buffer used by read_myfile */ |
||
| 59 | char myfilebuf[1000]; |
||
| 60 | |||
| 61 | /* This is the number of bytes read by read_myfile */ |
||
| 62 | int myfilebuf_length; |
||
| 63 | |||
| 64 | /* This function read myfile.txt (up to 1000 chars) */ |
||
| 65 | void read_myfile(void) |
||
| 66 | { |
||
| 67 | /* DOS file descriptor */ |
||
| 68 | DOS_FILE *f; |
||
| 69 | |||
| 70 | /* Error code */ |
||
| 71 | int err; |
||
| 72 | |||
| 73 | /* open the DOS file for reading (you can specify only "r" or "w") */ |
||
| 74 | f = DOS_fopen("myfile.txt","r"); |
||
| 75 | |||
| 76 | /* check for open errors */ |
||
| 77 | if (!f) { |
||
| 78 | /* error!! */ |
||
| 79 | err = DOS_error(); |
||
| 80 | |||
| 81 | /* note that if you call DOS_error() here, it return 0!!! */ |
||
| 82 | cprintf("Error %d opening myfile.txt...\n", err); |
||
| 83 | myfilebuf_length = 0; |
||
| 84 | return; |
||
| 85 | } |
||
| 86 | |||
| 87 | /* read up to 1000 chars */ |
||
| 88 | myfilebuf_length = DOS_fread(&myfilebuf,1,1000,f); |
||
| 89 | |||
| 90 | /* check for errors */ |
||
| 91 | err = DOS_error(); |
||
| 92 | |||
| 93 | cprintf("Read %d bytes from myfile.txt...\n", myfilebuf_length); |
||
| 94 | |||
| 95 | if (err) { |
||
| 96 | cprintf("Error %d reading myfile.txt...\n", err); |
||
| 97 | myfilebuf_length = 0; |
||
| 98 | /* there is not return because I want to close the file! */ |
||
| 99 | } |
||
| 100 | |||
| 101 | /* Close the file */ |
||
| 102 | DOS_fclose(f); |
||
| 103 | } |
||
| 104 | |||
| 105 | /* This function write myfile.out (up to 30 chars) */ |
||
| 106 | void write_myfile(void *arg) |
||
| 107 | { |
||
| 108 | DOS_FILE *f; /* DOS file descriptor */ |
||
| 109 | int err; /* Error code */ |
||
| 110 | int maxbytes; |
||
| 111 | int writtenbytes; /* number of files written */ |
||
| 112 | |||
| 113 | /* open the DOS file for writing (you can specify only "r" or "w") */ |
||
| 114 | f = DOS_fopen("myfile.out","w"); |
||
| 115 | |||
| 116 | /* check for open errors */ |
||
| 117 | if (!f) { |
||
| 118 | /* error!! */ |
||
| 119 | err = DOS_error(); |
||
| 120 | |||
| 121 | /* note that if you call DOS_error() here, it return 0!!! */ |
||
| 122 | cprintf("Error %d opening myfile.out...\n", err); |
||
| 123 | return; |
||
| 124 | } |
||
| 125 | |||
| 126 | /* write up to 30 bytes */ |
||
| 127 | if (myfilebuf_length > 30) |
||
| 128 | maxbytes = 30; |
||
| 129 | else |
||
| 130 | maxbytes = myfilebuf_length; |
||
| 131 | |||
| 132 | writtenbytes = DOS_fwrite(myfilebuf,1,maxbytes,f); |
||
| 133 | |||
| 134 | /* check for errors */ |
||
| 135 | err = DOS_error(); |
||
| 136 | |||
| 137 | cprintf("Written %d bytes into myfile.out...\n", writtenbytes); |
||
| 138 | |||
| 139 | if (err) { |
||
| 140 | cprintf("Error %d writing myfile.txt...\n", err); |
||
| 141 | /* there is not return because I want to close the file! */ |
||
| 142 | } |
||
| 143 | |||
| 144 | /* Close the file */ |
||
| 145 | DOS_fclose(f); |
||
| 146 | } |