1 /* 2 * Copyright (c) 2011 The Chromium OS Authors. 3 * See file CREDITS for list of people who contributed to this 4 * project. 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License as 8 * published by the Free Software Foundation; either version 2 of 9 * the License, or (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 19 * MA 02111-1307 USA 20 */ 21 22 #include <fcntl.h> 23 #include <stdlib.h> 24 #include <termios.h> 25 #include <unistd.h> 26 #include <sys/types.h> 27 #include <sys/stat.h> 28 29 #include <os.h> 30 31 /* Operating System Interface */ 32 33 ssize_t os_read(int fd, void *buf, size_t count) 34 { 35 return read(fd, buf, count); 36 } 37 38 ssize_t os_write(int fd, const void *buf, size_t count) 39 { 40 return write(fd, buf, count); 41 } 42 43 int os_open(const char *pathname, int flags) 44 { 45 return open(pathname, flags); 46 } 47 48 int os_close(int fd) 49 { 50 return close(fd); 51 } 52 53 void os_exit(int exit_code) 54 { 55 exit(exit_code); 56 } 57 58 /* Restore tty state when we exit */ 59 static struct termios orig_term; 60 61 static void os_fd_restore(void) 62 { 63 tcsetattr(0, TCSANOW, &orig_term); 64 } 65 66 /* Put tty into raw mode so <tab> and <ctrl+c> work */ 67 void os_tty_raw(int fd) 68 { 69 static int setup = 0; 70 struct termios term; 71 72 if (setup) 73 return; 74 setup = 1; 75 76 /* If not a tty, don't complain */ 77 if (tcgetattr(fd, &orig_term)) 78 return; 79 80 term = orig_term; 81 term.c_iflag = IGNBRK | IGNPAR; 82 term.c_oflag = OPOST | ONLCR; 83 term.c_cflag = CS8 | CREAD | CLOCAL; 84 term.c_lflag = 0; 85 if (tcsetattr(fd, TCSANOW, &term)) 86 return; 87 88 atexit(os_fd_restore); 89 } 90