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 #include <sys/mman.h> 29 30 #include <os.h> 31 32 /* Operating System Interface */ 33 34 ssize_t os_read(int fd, void *buf, size_t count) 35 { 36 return read(fd, buf, count); 37 } 38 39 ssize_t os_write(int fd, const void *buf, size_t count) 40 { 41 return write(fd, buf, count); 42 } 43 44 int os_open(const char *pathname, int flags) 45 { 46 return open(pathname, flags); 47 } 48 49 int os_close(int fd) 50 { 51 return close(fd); 52 } 53 54 void os_exit(int exit_code) 55 { 56 exit(exit_code); 57 } 58 59 /* Restore tty state when we exit */ 60 static struct termios orig_term; 61 62 static void os_fd_restore(void) 63 { 64 tcsetattr(0, TCSANOW, &orig_term); 65 } 66 67 /* Put tty into raw mode so <tab> and <ctrl+c> work */ 68 void os_tty_raw(int fd) 69 { 70 static int setup = 0; 71 struct termios term; 72 73 if (setup) 74 return; 75 setup = 1; 76 77 /* If not a tty, don't complain */ 78 if (tcgetattr(fd, &orig_term)) 79 return; 80 81 term = orig_term; 82 term.c_iflag = IGNBRK | IGNPAR; 83 term.c_oflag = OPOST | ONLCR; 84 term.c_cflag = CS8 | CREAD | CLOCAL; 85 term.c_lflag = 0; 86 if (tcsetattr(fd, TCSANOW, &term)) 87 return; 88 89 atexit(os_fd_restore); 90 } 91 92 void *os_malloc(size_t length) 93 { 94 return mmap(NULL, length, PROT_READ | PROT_WRITE, 95 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); 96 } 97