This is a very good question! I have a ksh function dealing with exactly this im my library.
Lets start with an integer: an integer is a sequence of digits 0-9 preceeded optionally with a plus or a minus sign:
Code:
# i assume the string in question was passed as argument $1 here
if [ -n "$(print - $1 | sed 's/[+-]*[0-9][0-9]*//')" ] ; then
print - "string is not an integer"
else
print - "string is an integer"
fi
The sed statement will delete out a possible integer and if the remaining string still contains characters ("-n") it can't be an integer. This mechanism is the core of my f_CheckInteger() function.
General numerics are a bit more complicated. I didn't bother to implement localized decimal separators (americans write "123.4", germans write "123,4", etc.) or something such, so i ended with the quite simple definition:
A numerical value is a string consisting of an optional plus/minus sign, followed by one or more digits 0-9, optionally followed by a full stop "." followed by one or more digits 0-9.
These are valid numbers according to this definition: 0.123 123 123.0, -123.4
These are not valid numbers: 0..123 0.123.456 123. +-12
Code:
# i assume the string in question was passed as argument $1 here
if [ -n "$(print - $1 | sed 's/[+-]*[0-9][0-9]*\(\.[0-9][0-9]*\)*//')" ] ; then
print - "string is not a numeric"
else
print - "string is a numeric"
fi
Hi Gengis-Kahn
I write a script I hope that you want to this like..
Code:
[root@rhnserver ~]# cat script.sh
if [[ "$1" = *[[:alpha:]]* && "$1" = *[[:digit:]]* ]] ; then
echo "Your parameter is alpha numeric"
else
if [[ "$1" = *[[:digit:]]* ]] ; then
echo "Your parameter is numeric"
else
if [[ "$1" = *[[:alpha:]]* ]] ; then
echo "Your parameter is a character"
else
echo "Your paramter is different type(except number or character)"
fi
fi
fi
A few examples :
Code:
[root@rhnserver ~]# ./script.sh 12121asa
Your parameter is alpha numeric
[root@rhnserver ~]# ./script.sh 12121
Your parameter is numeric
[root@rhnserver ~]# ./script.sh sasasasqsq
Your parameter is a character
We have a job which we need to run on daily bases, before loading data in a table we need to validate whether the input file is received or not.
Daily client will place the files in a particular path.Below files which I need to process for 04/01/2013(Load date).... (2 Replies)
We have a job which we need to run on daily bases, before loading data in a table we need to validate whether the input file is received or not.Inputfile formatsrc_sps_d_Call_Center_Reporting_yyyymmdd_01.dat SPS-Service nameYYYY-yearMM-MonthDD-dayLike above we will get n number of files for... (1 Reply)
$Input_filename=$ARGV;
if (!-d $Input_filename && ! -e $Input_filename)
{
print "USAGE: Please enter '$ABCD/def/dsed.txt' as an arguement \n";
exit;
}
1. Input Is suppose to be something like "$ABCD/def/dsed.txt".
if the input is wrong the script should throw an ERROR message.... (2 Replies)
Is there an easy way to validate an input field size. Let us say a script is asking to enter 10 digits mobile number, how do I write a script to validate it is numeric and is 10 digits in length? I just need an easy way w/o using looks ...etc. Is there such a away ?
Here is what I have so far... (6 Replies)
I'm writing a bash shell script to 'help' me post to susepaste (I can NEVER remember the time options).
Here's the code:
#!/bin/bash
##########
#
# Project : personal script.
# Started : Wed Aug 03, 2011
# Author : Habitual
# Description : susepaste c-li script with user... (5 Replies)
Hi,
This will most likely be a simple answer.
Currently I have a situation where my script will be sent various options:
-o1 -o2 -oe3@somthing.com
Now, if I want to run a certain command based on the option I am sent, I am doing the following.
for o in $(echo $options)
do
if
... (3 Replies)
Hey, im trying to validate a user input and need some help. The input needs to be just a single letter. Im using a case to so this eg:
read answer
case $answer in
*) echo "OK"
;;
*) echo "This is a number"
read answer
;;
*) echo... (2 Replies)
the user inputs names that have to be inside square brackets
I want to check if the user puts the brackets and if not ask him to re-enter the names (9 Replies)
Hi all,
I have a shell script(K shell) which takes a date as input.
i want the input to be in DD-MM-YYYY format.
Can i enforce such a format of input string using just one line of code?
OR
do i need to parse the input date into different components and test them using Case statements... (2 Replies)
