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Top Forums Shell Programming and Scripting Error to Read Input from command line Post 302907708 by rocking77 on Tuesday 1st of July 2014 08:02:11 AM
Old 07-01-2014
Thanks for your replies this is ksh .Batte I used your sytax .


Code:
 
while true ;do
        
read  yn? "Do You Wish To Take Database Backup for $DB?? " 
 case $yn in
 [Yy]*) echo " YES take backup ";;
        [Nn]*) echo " NO BACKUP " ;;
         *) echo "Please Answer Yes OR NO " ;;
esac
done

I don't see its running fine .I can see more errors though its taking inputs from command line .May be i should add break in each choice to come out of the loop ?


Code:
 
./Config.sh[56]: Do You Wish To Take Database Backup for ?? : This is not an identifier.
Please Answer Yes OR NO
y
./Config.sh[56]: Do You Wish To Take Database Backup ?? : This is not an identifier.
 YES take backup
./Config.sh[56]: Do You Wish To Take Database Backup ??  : This is not an identifier.
Please Answer Yes OR NO
n
./Config.sh[56]: Do You Wish To Take Database Backup ??   : This is not an identifier.
 NO BACKUP
./Config.sh[56]: Do You Wish To Take Database Backup ??  : This is not an identifier.
Please Answer Yes OR NO
cancel
./Config.sh[56]: Do You Wish To Take Database Backup for ?? : This is not an identifier.
Please Answer Yes OR NO

 

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CAT(1)							      General Commands Manual							    CAT(1)

NAME
cat, read, nobs - catenate files SYNOPSIS
cat [ file ... ] read [ -m ] [ -n nline ] [ file ... ] nobs [ file ... ] DESCRIPTION
Cat reads each file in sequence and writes it on the standard output. Thus cat file prints a file and cat file1 file2 >file3 concatenates the first two files and places the result on the third. If no file is given, cat reads from the standard input. Output is buffered in blocks matching the input. Read copies to standard output exactly one line from the named file, default standard input. It is useful in interactive rc(1) scripts. The -m flag causes it to continue reading and writing multiple lines until end of file; -n causes it to read no more than nline lines. Read always executes a single write for each line of input, which can be helpful when preparing input to programs that expect line-at-a- time data. It never reads any more data from the input than it prints to the output. Nobs copies the named files to standard output except that it removes all backspace characters and the characters that precede them. It is useful to use as $PAGER with the Unix version of man(1) when run inside a win (see acme(1)) window. SOURCE
/src/cmd/cat.c /src/cmd/read.c /bin/nobs SEE ALSO
cp(1) DIAGNOSTICS
Read exits with status eof on end of file or, in the -n case, if it doesn't read nlines lines. BUGS
Beware of and which destroy input files before reading them. CAT(1)
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