Dear Bretheren, I'm almost the serial opener exraordinare by now. Except, I'm getting a strange error message from my two serial ports on Linux which I'm trying to 1. supress 2. not use those ports. How do I do that?. The errors I'm getting are: (I have ttyS0, ttyS1, ttyS2, ttyS3 - the later two complaint)

can't getattr: Input/output error at registry.pl line 36
can't getattr: Input/output error at registry.pl line 36
ports opening are: /dev/ttyS1 /dev/ttyS0

[download]

Code

eval "use Device::SerialPort; 1" or die $@;
my $directory = '/dev';
opendir (DIR, $directory) or die $!;
while (my $file = readdir(DIR)) {
  push (@ports, "$directory/$file") if ($file =~ /ttyS/g);
  push (@ports, "$directory/$file") if ($file =~ /ttyUSB/g);
}
 closedir(DIR);
foreach my $port (@ports){
    $PortObj = new Device::SerialPort($port, 1) or next; 
    $PortObj->close; 
    push(@ok_ports, $port);
    sleep (1);
}
print "ports opening are: @ok_ports \n";

[download]

In reply to Supressing error messages on serial port open in Linux by pashanoid

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.