Welcome to forums, please use code tags for commands/codes/Inputs which you are using into your posts as per forum rules. Could you please try following.
You could go through manual entry for test too.
Quote:
-z STRING
the length of STRING is zero
Thanks,
R. Singh
Last edited by RavinderSingh13; 06-07-2016 at 03:29 AM..
Hi all, I'm confused about the proper syntax for multi-conditional if then statements. I'm trying to set limitations on info input on the command line.. i.e.
if ] ;then
$x=$vr1
else
print "You have entered an invalid option."
Can someone please clue me in on what is wrong with my syntax;... (3 Replies)
Hello,
I am having trouble with the syntax with a conditional statement in a BASH script involving multiple conditions. Any suggestions would be greatly appreciated!
if ; then
array=("${array}" "$dnNum" )
fi
i receive this error:
./testscript: ' (4 Replies)
Guys, Im trying to have a script that evaluates multiple conditions :
test.sh:
if
then
echo "host $1"
else
if
then
echo "host $1"
else
echo $1 not valid
exit 1
fi
when I do
./test.sh brazil1
I get: (4 Replies)
Hi All,
I am new to shell scripting.
Can any one say what is wrong in this if statement, that uses multiple conditions
if
then
***************
else
if ( -z $pcs && "$night_time_calc" > "$night_time" )
then
********************************
... (4 Replies)
how can i specify more than 1 consition in the following AWK statament??
i.e. if $2 is ABCD and $3 is MNOP and $4 is KLPM
similarly for OR
#!/bin/ksh
awk -F '' ' $2 == "ABCD" { print $2, $3;}' file.xml (2 Replies)
Hi,
When i use the below code snippet in my shell script OFC_10.sh:
if
then
echo "Success"
exit 2
elif
then
echo "Failure"
exit 6
I get the error message:
./OFC_10.sh: line 41: '
./OFC_10.sh: line 45: '
Line 41 is the line where If loop starts and line 45 is... (2 Replies)
Deal Experts
I am working on a script to find a date which is 7 days older and follwoing is my approach
#!/bin/sh
Yr=`date +"%Y"`
Mn=`date +"%m"`
Md=28
Da=`date +"%d"`
echo $Yr
echo $Mn
echo $Da
var1=$Yr$Mn$Da
echo "before" $var1
if expr $Da > 7
then Da=`expr $Da - 7`... (3 Replies)
Hello Unix-Forums!
It has been a long time since my last post, but finally I've got a new question:
I know in case you can use multiple patterns by
case $var in
a|b|c|ab)
and so on.
But how would I place an OR between
if ]
then
...
if ]
then
...
I want to execute the "..." if... (3 Replies)
Hi Gurus,
Is there a way we can set a logic for this problem ?
The input file looks like below;
1 15 17
2 8 12
3 18 24
4 21 23
5 2 4
6 11 25
So, I would like to print for any row of the input file where the range of value between $2 to $3 lies within the min and max values of Min=10... (2 Replies)
I am analyzing one of the scripts written by another person.script is having multiple if conditions and everything are nested.The code is not formatted properly.Is there any way to identify in Unix to identify begin and end of a particular if block? (6 Replies)
Discussion started by: vamsi.valiveti
6 Replies
LEARN ABOUT ULTRIX
getopt
getopt(1) General Commands Manual getopt(1)Name
getopt - parse command options
Syntax
set - - getopt optstring $*
Description
The command breaks up options in command lines for easy parsing by Shell procedures and checks for legal options. The optstring option
letters are recognized if a letter is followed by a colon, the option expects an argument which may or may not be separated from it by
white space. For further information, see
The special option, specified by two minus signs (- -), delimits the end of the options. If the delimiters are used explicitly, recognizes
it; otherwise, generates it. In either case, places the delimiter at the end of the options. The positional parameters ($1 $2 ...) of the
shell are reset so that each option is preceded by a single minus sign (-) and is in its own positional parameter; each option argument is
also parsed into its own positional parameter.
Examples
The following code fragment shows how you can process the arguments for a command that can take the options a or b, as well as the option
o, which requires an argument:
#!/bin/sh5
set -- getopt abo: $*
if [ $? != 0 ]
then
echo $USAGE
exit 2
fi
for i in $*
do
case $i in
-a | -b) FLAG=$i; shift;;
-o) OARG=$2; shift 2;;
--) shift; break;;
esac
done
This code accepts any of the following as equivalent:
cmd -aoarg file file
cmd -a -o arg file file
cmd -oarg -a file file
cmd -a -oarg -- file file
Diagnostics
The command prints an error message on the standard error when it encounters an option letter not included in optstring.
See Alsosh5(1), getopt(3)getopt(1)