Managing and using PTSes Post: 302711035

Sponsored Content

Top Forums Programming Managing and using PTSes Post 302711035 by erupter on Friday 5th of October 2012 10:16:43 AM

10-05-2012

Registered User

Managing and using PTSes

Hello.

I need to simulate a few serial links (doing a simulation of an application for a robot) and found socat which, at least with minicom, is working flawlessly.

I would really like to make pts static: ie same numbers between reboots, and automatic (not me opening terminals and leaving them with empty socat windows).
Is there a way for this?

Or maybe there is a (super easy!) way of replicating what socat does inside my own program so that I don't have to start multiple executables?

I also have problems with the ports themselves, don't know if these problems stem from the fact they are virtual.

Here is the bulk of the serial code (bluntly copied from link)

Code:

    fd = open(PortIn, O_RDWR | O_NOCTTY | O_NDELAY);
    if (fd == -1 )
    {
        dbg_print(MAIN_PROC_NAME,"Failed to open input port %s\n",PortIn);
        dbg_print(MAIN_PROC_NAME,"Error: %s\n",strerror(errno));
    }
    else
        dbg_print(MAIN_PROC_NAME,"Connected to port \"%s\"\n",PortIn);

    tcgetattr(fd,&oldtio); /* save current port settings */
    bzero(&newtio, sizeof(newtio));
    newtio.c_cflag = BAUDRATE | CRTSCTS | CS8 | CLOCAL | CREAD;
    newtio.c_iflag = IGNPAR;
    newtio.c_oflag = 0;

    /* set input mode (non-canonical, no echo,...) */
    newtio.c_lflag = 0;

    newtio.c_cc[VTIME]    = 0;   /* inter-character timer unused */
    newtio.c_cc[VMIN]     = 5;   /* blocking read until 5 chars received */

    tcflush(fd, TCIFLUSH);
    tcsetattr(fd,TCSANOW,&newtio);
    while (1) {
        res = read(fd,input_buffer,255);
        if (res > 0)
        {
            input_buffer[res]=0;
            dbg_print(MAIN_PROC_NAME,"String received %s\n",input_buffer);
        }
        if (res < 0)
            dbg_print(MAIN_PROC_NAME,"Error: %s\n",strerror(errno));

All I get is an endless list of
"Resource temporary unavailable"

Thank you for any input.

Last edited by erupter; 10-05-2012 at 11:49 AM..

erupter

View Public Profile for erupter

Find all posts by erupter

8 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

managing users

I need to setup several accounts on a solaris system. (passwd,shadow,group) My question is : How can I create a group which can access a machine, but only in certain directories?

2. UNIX for Advanced & Expert Users

best solution for managing many nameservers

Hello, i was searching around for good solution for managing many nameservers to add the records on the slave servers and update them and if possible some web-based manegment for non-experianced customers. anyone has an idea where can i find such solution?

3. UNIX for Advanced & Expert Users

Managing nodes???

Does anyone know something about this? I have no idea what it means and how to do it. but if anyone can give me and explanation and also point me to a website, i'd really appreciate it

4. Programming

error in managing linklist

I have used link list in my program to operate on set of values the operations that i am doing : add , delete from link list when i am deleting the intermidiate or last value it is not giving any error but when i am deleting the 1 st value then program hangs can anyone suggest me the reason

5. Solaris

Managing FileSystems on Solaris

Hello. I have got Solaris 10 8/07 on x86 installed successfully using CDs. While I had inserted 1st CD - I created 2 new filesystems also. But now after entering into Solaris - How do I manipulate sizes or created/delete filesystems by going to terminal? Thank you!

6. What is on Your Mind?

Managing Geeks

Hi, I recently found this article in computerworld and I think it is very true - at least in my company ... what do you guys think - is the author right? Is it ignorant management that makes us IT people seem to be anti-social and weird? Please share your thoughts Kind regards zxmaus

7. Solaris

Problems managing user

I installed Solaris 10 in an old Dell computer given to me. The filesystem is ZFS (Default). The problem is that after logging in as root (first login) I wanted to add a user : n2jkw. I added the user at /export/home/n2jkw BTW, /export/home is where the 150G extra Hard Drive is mounted to....

8. UNIX for Dummies Questions & Answers

expr help - managing strings

Hi guys, I need to use regular expressions in linux and I'm not quite experience in that field, maybe someone could give me some help with it. Basically, I need to take a text like this. A234321=http://www.google..... a normal URL But, I need to take the string starting at...

LEARN ABOUT POSIX

pts_quit

PTS_QUIT(1)						       AFS Command Reference						       PTS_QUIT(1)

NAME

       pts_quit - Exit from pts interactive mode

SYNOPSIS

       pts quit [-cell] <cell name> [-noauth] [-localauth]
	   [-force]

       pts q [-c] <cell name> [-n] [-l] [-f]

DESCRIPTION

       The pts quit command exits from pts interactive mode.  The command can be run from the command line or interactively, but on the command
       line it does nothing and is therefore of questionable utility.

CAUTIONS

       Prior to OpenAFS 1.4.5 and OpenAFS 1.5.23, the pts quit command was only available on Unix or Linux and when OpenAFS was compiled with the
       supergroups option (disabled by default).  As of OpenAFS 1.4.5 and 1.5.23, it is always available.

OPTIONS

       Although they have no effect, pts quit takes the following standard pts options:

       -cell <cell name>
	   Names the cell in which to run the command. For more details, see pts(1).

       -force
	   Enables the command to continue executing as far as possible when errors or other problems occur, rather than halting execution at the
	   first error.

       -help
	   Prints the online help for this command. All other valid options are ignored.

       -localauth
	   Constructs a server ticket using a key from the local /etc/openafs/server/KeyFile file. Do not combine this flag with the -cell or
	   -noauth options. For more details, see pts(1).

       -noauth
	   Assigns the unprivileged identity anonymous to the issuer. For more details, see pts(1).

OUTPUT

       This command produces no output.

EXAMPLES

       Here is an example of a pts interactive session:

	  % pts interactive
	  pts> quit
	  %

SEE ALSO

       pts(1), pts_interactive(1)

COPYRIGHT

       Copyright 2007 Jason Edgecombe <jason@rampaginggeek.com>

       This documentation is covered by the BSD License as written in the doc/LICENSE file. This man page was written by Jason Edgecombe for
       OpenAFS.

OpenAFS 							    2014-04-08							       PTS_QUIT(1)