Sponsored Content
Top Forums Shell Programming and Scripting IP address validation function Post 302110561 by cfajohnson on Tuesday 13th of March 2007 06:51:38 PM
Old 03-13-2007
Quote:
Originally Posted by hcclnoodles
Hi does anybody have a ksh/sh/bash function that i can embed into my script that i could use to validate an inputted IP address, I tried using one big long regular expression but it got very long and complicated

ie

Code:
#!/bin/ksh
echo " Please enter your IP address"
read IP
 ---some function to determine if it is valid or not

Assuming a dotted quad format:

Code:
valid_dotted_quad()
{
    ERROR=0
    oldIFS=$IFS
    IFS=.
    set -f
    set -- $1
    if [ $# -eq 4 ]
    then
      for seg
      do
        case $seg in
            ""|*[!0-9]*) ERROR=1;break ;; ## Segment empty or non-numeric char
            *) [ $seg -gt 255 ] && ERROR=2 ;;
        esac
      done
    else
      ERROR=3 ## Not 4 segments
    fi
    IFS=$oldIFS
    set +f
    return ERROR
}

Test $IP with:

Code:
if valid_dotted_quad "$IP"
then
   ## IP OK
else
   ## Not OK
  printf "%s is not a valid dotted quad IP address" "$IP" >&2
fi

Note, however, that other formats can be valid IP addresses.
 

9 More Discussions You Might Find Interesting

1. IP Networking

How to Achive IP address through MAC(Ethernet) address

Hi sir, i want to make such programe which takes MAC(Ethernet) address of any host & give me its IP address....... but i'm nt getting that how i can pass the MAC address to Frame........ Please give me an idea for making such program... Thanks & regards Krishna (3 Replies)
Discussion started by: krishnacins
3 Replies

2. Shell Programming and Scripting

regular expression for MAC address validation

Hi there I am running a script which requires the input of a MAC address from the user and was loooking for a regex that will verify the user has inputted a full 12 digit valid MAC with colons Ive seen a few on some sites that look huge and was wondering if anybody had a one liner (or as... (21 Replies)
Discussion started by: hcclnoodles
21 Replies

3. Shell Programming and Scripting

EMail Address Validation (Shell Script)

Hi, Can anyone provide me the code snippet for EMail Address Validation. User is going to enter the email address in form window. I need to validate the format is correct. Thanks in Advance BS (3 Replies)
Discussion started by: balajiora
3 Replies

4. Shell Programming and Scripting

ksh - how to list all ip address between 2 ip address

Trying to do a ksh script that needs to list all ip address between ip address a and b .. ie. Ip address A=192.168.1.200 Ip address B=192.168.2.15 So the subnet changes from 1 to 2 but I want to list all possible ip addresses between the 2.. Which would be: 192.168.1.200... (4 Replies)
Discussion started by: frustrated1
4 Replies

5. UNIX for Dummies Questions & Answers

Panic kernal-mode address fault on user address 0x14

:) Firstly Hi all!!, im NEW!! and on here hoping that someone might be able to offer me some help... i have a server that keeps crashing every few days with the error message: PANIC KERNAL-MODE ADDRESS FAULT ON USER ADDRESS 0X14 KERNAL PAGE FAULT FROM (CS:EIP)=(100:EF71B5BD) EAX=EF822000... (10 Replies)
Discussion started by: Twix
10 Replies

6. AIX

function trace back and address to line number conversion

Hi, I am new to AIX and I am developing a small tool for our product which helps debug memory leaks etc. Q1)Is there a way in which i can get a function trace back as to the call (lets say malloc() )has been made in which file--> in which function. I tried using the #pragma options (... (0 Replies)
Discussion started by: Wkdunreal
0 Replies

7. IP Networking

Tracing a MAC address to IP address: Solaris

Hi there I lost connectivity to one of our remote systems and when I checked the messages log I found the following: Aug 10 23:42:34 host xntpd: time reset (step) 1.681729 s Aug 16 13:20:51 host ip: WARNING: node "mac address" is using our IP address x.x.x.x on aggr1 Aug 16 13:20:51 host... (9 Replies)
Discussion started by: notreallyhere
9 Replies

8. UNIX for Advanced & Expert Users

What is the function to get address of the virtual memory block in linux??

I want address of current virtual memory block? i am using fedora10:wall::wall: (1 Reply)
Discussion started by: powyama
1 Replies

9. UNIX for Advanced & Expert Users

C program to detect duplicate ip address if any after assigning ip address to ethernet interface

Hi , Could someone let me know how to detect duplicate ip address after assigning ip address to ethernet interface using c program (3 Replies)
Discussion started by: Gopi Krishna P
3 Replies
IRSEND(1)							   User Commands							 IRSEND(1)

NAME
irsend - basic LIRC program to send infra-red commands SYNOPSIS
irsend [options] DIRECTIVE REMOTE CODE [CODE...] DESCRIPTION
Asks the lircd daemon to send one or more CIR (Consumer Infra-Red) commands. This is intended for remote control of electronic devices such as TV boxes, HiFi sets, etc. DIRECTIVE can be: SEND_ONCE - send CODE [CODE ...] once SEND_START - start repeating CODE SEND_STOP - stop repeating CODE LIST - list configured remote items SET_TRANSMITTERS - set transmitters NUM [NUM ...] SIMULATE - simulate IR event REMOTE is the name of a remote, as described in the lircd configuration file. CODE is the name of a remote control key of REMOTE, as it appears in the lircd configuration file. NUM is the transmitter number of the hardware device. For the LIST DIRECTIVE, REMOTE and/or CODE can be empty: LIST "" "" - list all configured remote names LIST REMOTE "" - list all codes of REMOTE LIST REMOTE CODE - list only CODE of REMOTE The SIMULATE command only works if it has been explicitly enabled in lircd. -h --help display usage summary -v --version display version -d --device use given lircd socket [/var/run/lirc/lircd] -a --address=host[:port] connect to lircd at this address -# --count=n send command n times EXAMPLES
irsend LIST DenonTuner "" irsend SEND_ONCE DenonTuner PROG-SCAN irsend SEND_ONCE OnkyoAmpli VOL-UP VOL-UP VOL-UP VOL-UP irsend SEND_START OnkyoAmpli VOL-DOWN ; sleep 3 irsend SEND_STOP OnkyoAmpli VOL-DOWN irsend SET_TRANSMITTERS 1 irsend SET_TRANSMITTERS 1 3 4 irsend SIMULATE "0000000000000476 00 OK TECHNISAT_ST3004S" FILES
/etc/lirc/lircd.conf Default lircd configuration file. It should contain all the remotes, their infra-red codes and the corresponding timing and wave- form details. DIAGNOSTICS
If lircd is not running (or /var/run/lirc/lircd lacks write permissions) irsend aborts with the following diagnostics: "irsend: could not connect to socket" "irsend: Connection refused" (or "Permission denied"). SEE ALSO
The documentation for lirc is maintained as html pages. They are located under html/ in the documentation directory. lircd(8), mode2(1), smode2(1), xmode2(1), irrecord(1), irw(1), http://www.lirc.org. irsend 0.9.0-pre1 October 2010 IRSEND(1)
All times are GMT -4. The time now is 04:43 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy