Help Generate new port base on the last port but not in used by other application Post: 303004415

Sponsored Content

Top Forums Shell Programming and Scripting Help Generate new port base on the last port but not in used by other application Post 303004415 by lxdorney on Sunday 1st of October 2017 05:10:33 PM

10-01-2017

Registered User

Quote:

Originally Posted by jim mcnamara

These are the well known ports from IANA. Basically it means if you use one of these
adhoc you run the risk of breaking something - now or next week. Just because a port is unused right now does not mean it won't get used again soon.

Is there a reason you have to use low number ports?

Try something like this:

Code:

LASTPORT=32767
ss | awk ' /\*/ {print $6 } > portlist.txt

getport {
   result="FAIL"
   for (( i=8193; i<$LASTPORT; i++))
   do
         grep -q "$i" portlist.txt && continue
         result="$i"
         break
   done
   echo "$result"
}
# usage
port=$( getport )
if [ "$port" = "FAIL" ] ; then
   echo "no ports available"
   exit
fi
# use the port number here

You could also create an array (port based) on the awk output and search through the array rather than using grep. Use the mapfile command, which creates an array named MAPFILE with every port number in it. You can also use associative arrays to speed up your search. None of this is really useful except when you are creating lots of ports.

No is just a sample port Sir

lxdorney

View Public Profile for lxdorney

Find all posts by lxdorney

9 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

which port to write my server application?

I want to write a server application that would accept HTTP requests from client. The server would be on a machine that has no connection to the INTERNET. The clients that would be posting their HTTP requests would be doing so through webbrowser .Thus it would be sort of intranet application....

2. IP Networking

How can I check what port addresses used the application

Hello Mentors! I am a new here in the furom, i hope somebody can understand my problem. Basically we have an application here called unigraphics and being installed per station and the setup is look like this. 1. installed unigraphics UGNX3 version on every station 2. some are installed in...

3. UNIX for Dummies Questions & Answers

What application is using the port

Hello im using sunos im trying to lock down application that taking my port when Im doing "netstat -in | grep 8080" Is gives me the indication that the port is taken but no indication who is taken the port. How can I find out who is taking my port? Thanks allot

4. Programming

how to write application for 32 com port

Dear Sir, i m going to use NP5610-16 moxa device for multiport serial communication. i m using fedora-core 6 o.s. after installation it will detect serial ports as /dev/ttyr0,/dev/ttyr1...ttyr32. there are total 32 com ports. now i want to write application which monitor all serial ports and...

5. Linux

MQ application port 1414

Hi All, I have two MQ (port) 1414 established (going out) $ netstat -an | grep 1414 tcp 0 0 0.0.0.0:1414 0.0.0.0:* LISTEN tcp 0 0 20.76.1.1:32855 142.8.1.3:1414 ESTABLISHED tcp 0 0...

6. Shell Programming and Scripting

command to know the application running of the port

Hi, is there any command to findout that which application is using the particular port. or whether any port is occupied with the specfic process id ?

7. Solaris

How to enable Serial port on ILOM, when Network Port is enabled in parallel

Hi Everyone, In my environment, I have few T5220. On the iLOM Management Card, I have both Network and Serial port are cabled, I don't have any issues while I try to connect using Network Management port, but when I try to connect the serial port for the same server which is actually connected...

8. Solaris

Cabling and adapters to communicate to service processor serial port from Windows PC with USB port.

Hello, I have an unloaded T5140 machine and want to access the ILOM for the first time and subsequently the network port after that., and then load Solaris 10 the final January 2011 build. The first part is what confuses me -the cabling. I am coming from a Windows machine (w/appropriate...

9. Solaris

How to find port number wwn of particular port on dual port HBA,?

please find the below o/p for your reference bash-3.00# fcinfo hba-port HBA Port WWN: 21000024ff295a34 OS Device Name: /dev/cfg/c2 Manufacturer: QLogic Corp. Model: 375-3356-02 Firmware Version: 05.03.02 FCode/BIOS Version: BIOS: 2.02; fcode: 2.01;...

LEARN ABOUT ULTRIX

dc

dc(4) Kernel Interfaces Manual dc(4)

Name
dc - serial line/mouse/keyboard

Syntax
device dc0 at ibus? vector dcintr

Description
The serial line controller provides four ports, with modem control on two of the ports. The DECstation 3100 and DECstation 2100 only pro-
vide partial modem control. The DECstation 5000 provides full modem control. The ports are used as follows:

Port Usage
0 Graphics device keyboard at 4800 BPS
1 Mouse or tablet at 4800 BPS
2 Communications port 1 (w/modem control)/local terminal
3 Communications port 2 (w/modem control)/local terminal

Each communication port from the serial line controller behaves as described in and can be set to run at any of 16 speeds. For the encod-
ing, see

When a graphics device is not being used as the system console, communications port 2 becomes the system console. In this configuration,
the port can only be used at 9600 BPS and no modem control is supported.

The serial line driver operates in interrupt-per-character mode (all pending characters are flushed from the silo on each interrupt).

Restrictions
Speed must be set to 9600 BPS on the console port and 4800 BPS on ports used by graphics devices. The serial line driver enforces this
restriction; that is, changing speeds with the command may not always work on these ports.

Files
console terminal

local terminal

See Also
console(4), devio(4), tty(4), ttys(5), MAKEDEV(8)

RISC dc(4)

9 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

which port to write my server application?

Discussion started by: rraajjiibb

2. IP Networking

How can I check what port addresses used the application

Discussion started by: eykyn17

3. UNIX for Dummies Questions & Answers

What application is using the port

Discussion started by: umen

4. Programming

how to write application for 32 com port

Discussion started by: amitpansuria

5. Linux

MQ application port 1414

Discussion started by: itik

6. Shell Programming and Scripting

command to know the application running of the port

Discussion started by: mail2sant