From 88178e01c428c528750fc29ff2576822aa6d7153 Mon Sep 17 00:00:00 2001 From: Thadeu Lima de Souza Cascardo Date: Thu, 20 May 2010 09:44:10 -0400 Subject: [PATCH] Added user space program to loop reading hello device. --- usr.c | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) create mode 100644 usr.c diff --git a/usr.c b/usr.c new file mode 100644 index 0000000..0829125 --- /dev/null +++ b/usr.c @@ -0,0 +1,37 @@ +/* + * Copyright (C) 2010 Thadeu Lima de Souza Cascardo + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + + +#include +#include + +int main(void) +{ + int fd; + char buffer[16]; + int r; + fd = open("/dev/hello", O_RDONLY); + if (fd < 0) + return 1; + while (1) { + lseek(fd, 0, SEEK_SET); + r = read(fd, buffer, sizeof(buffer)); + write(1, buffer, r); + } + return 0; +} -- 2.20.1