<div dir="ltr">FYI...I tried using this and didn't get it to work but there is a way to do this using freopen, dup, dup2 by saving stdin,stdout then redirecting to dev/tty and then restoring them back. This method seems to work the best for me. Thanks.<div>
<br></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Thu, Nov 28, 2013 at 5:02 AM, kwang9 <span dir="ltr"><<a href="mailto:kwang9@stevens.edu" target="_blank">kwang9@stevens.edu</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Dear Shen,<br>
<br>
while (read(...)) ; // read all content from stdin, it fails when file is BIG<br>
freopen("/dev/tty", "r", stdin); // redirect stdin back to terminal<br>
printf("Input phrase:\n"); // prompting<br>
read(...);<br>
<br>
Anyway there's another work around:<br>
<br>
FILE *phr_fd=fopen("/dev/tty", "r"); // get terminal's fd first<br>
printf("Input phrase:\n"); // prompting<br>
read(...);<br>
fclose(phr_fd);<br>
while (read(...)) { // do work now<br>
/* deal line by line */<br>
}<br>
<br>
在 2013-11-28 03:39，Hongyi Shen 写道：<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div class="h5">
This problem has frustrated me for hours.<br>
<br>
In the requirement of HW5,<br>
<br>
echo "Kookaburra has left the tree" | aed -e | aed -d<br>
<br>
Then we want user to input passphrase, but scanf will<br>
read "Kookaburra has left the tree" first, instead of waiting for<br>
user's passphrase.<br>
<br>
（When use pipe, isatty might be a way）<br>
<br>
Thank you all, enjoy the holiday.<br>
<br></div></div>
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