From cb3568f6daeeb35b6bf7effec71715780946b117 Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@realraum.at>
Date: Tue, 12 Jul 2011 22:36:45 +0000
Subject: [PATCH] added ttyread command

---
 dart/ttyread.c |  116 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 116 insertions(+)
 create mode 100644 dart/ttyread.c

diff --git a/dart/ttyread.c b/dart/ttyread.c
new file mode 100644
index 0000000..cd057f7
--- /dev/null
+++ b/dart/ttyread.c
@@ -0,0 +1,116 @@
+/*
+ *  ttyread
+ *
+ *
+ *  Copyright (C) 2011 Christian Pointner <equinox@realraum.at>
+ *
+ *  This file is part of ttyread.
+ *
+ *  ttyread 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 3 of the License, or
+ *  any later version.
+ *
+ *  ttyread 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 ttyread. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <sys/select.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <fcntl.h>
+#include <termios.h>
+#include <unistd.h>
+#include <stdio.h>
+
+int setup_tty(int fd)
+{
+  struct termios tmio;
+  
+  int ret = tcgetattr(fd, &tmio);
+  if(ret) {
+    perror("tcgetattr()");
+    return ret;
+  }
+
+  ret = cfsetospeed(&tmio, B57600);
+  if(ret) {
+    perror("cfsetospeed()");
+    return ret;
+  }
+
+  ret = cfsetispeed(&tmio, B57600);
+  if(ret) {
+    perror("cfsetispeed()");
+    return ret;
+  }
+
+  tmio.c_lflag &= ~ECHO;
+  tmio.c_lflag |= CLOCAL;
+
+  ret = tcsetattr(fd, TCSANOW, &tmio);
+  if(ret) {
+    perror("tcsetattr()");
+    return ret;
+  }
+  
+  ret = tcflush(fd, TCIFLUSH);
+  if(ret) {
+    perror("tcflush()");
+    return ret;
+  }
+
+  fd_set fds;
+  struct timeval tv;
+  FD_ZERO(&fds);
+  FD_SET(fd, &fds);
+  tv.tv_sec = 0;
+  tv.tv_usec = 50000;
+  for(;;) {
+    ret = select(fd+1, &fds, NULL, NULL, &tv);
+    if(ret > 0) {
+      char buffer[100];
+      ret = read(fd, buffer, sizeof(buffer));
+    }
+    else
+      break;
+  }
+
+  return 0;
+}
+
+int main(int argc, char* argv[])
+{
+  if(argc < 2) {
+    fprintf(stderr, "Please specify a path to the tty\n");
+    return 1;
+  }
+
+  int fd = open(argv[1], O_RDONLY);
+  if(fd < 0) {
+    perror("open()");
+    return 2;
+  }
+
+  if(setup_tty(fd)) return 3;
+
+  char buf[100];
+  for(;;) {
+    int r = read(fd, buf, sizeof(buf));
+    if(r <=0 ) return r;
+    
+    int i;
+    for(i=0; i < r;) {
+      int w = write(fd, &(buf[i]), r - i);
+      if(w < 0) return w;
+      i+=w;
+    }
+  }
+
+  return 0;
+}
-- 
1.7.10.4