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Top Forums Shell Programming and Scripting function terminating if i give input as space or no input and enter Post 302680827 by BHASKARREDDY006 on Thursday 2nd of August 2012 10:49:52 AM
Old 08-02-2012
Data function terminating if i give input as space or no input and enter

HI
i have written a script to ask input from the user.
this script should promote the user for y/n input. if user enters anyother input then y/n
the script promotes him again. this below code is working fine for all the cases.

except for space and enter " if i give space and enter it is printing

echo "\n Goodbye ... !!!"

Code:
while [  ${confirm} != 'y' -a ${confirm} != 'Y'  ]
do
echo "\n Do you want to continue ? (y/n)"
read confirm # reads the option and proceedsconfirm
    if [ ${confirm} != 'n' -a ${confirm} != 'N' ]
    then
        if  [  ${confirm} != 'y' -a ${confirm} != 'Y' ]
        then
                 echo "\n **********  Warning - Invalid input -Please enter a valid input **********"
        else
        echo
        fi
    else
        echo "************ User terminated  ********"
        echo "\n Goodbye ... !!!"
        exit 0;
    fi
done



Any ideasSmilieSmilieSmilieSmilieSmilieSmilie
Moderator's Comments:
Mod Comment
Please use code tags when posting data and code samples!

Last edited by vgersh99; 08-02-2012 at 11:57 AM.. Reason: code tags, please!
 

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script(1)						      General Commands Manual							 script(1)

NAME
script - make typescript of terminal session SYNOPSIS
[file] DESCRIPTION
makes a typescript of everything printed on your terminal. It starts a shell named by the environment variable, or by default and silently records a copy of output to your terminal from that shell or its descendents, using a pseudo-terminal device (see pty(7)). All output is written to file, or appended to file if the option is given. If no file name is given, the output is saved in a file named The recording can be sent to a line printer later with lp(1), or reviewed safely with the option of cat(1). The recording ends when the forked shell exits (or the user ends the session by typing "exit") or the shell and all its descendents close the pseudo-terminal device. This program is useful when operating a CRT display and a hard-copy record of the dialog is desired. It can also be used for a simple form of session auditing. respects the convention for login shells as described in su(1), sh(1), and ksh(1). Thus, if it is invoked with a command name beginning with a hyphen (that is, passes a basename to the shell that is also preceded by a hyphen. The input flow control can be enabled by setting environmental variable before running Please see section for details on using this envi- ronment variable. EXAMPLES
Save everything printed on the user's screen into file Append a copy of everything printed to the user's screen to file WARNINGS
A command such as which displays the contents of the destination file, should not be issued while executing because it would cause to log the output of the command to itself until all available disk space is filled. Other commands, such as more(1), can cause the same problem but to a lesser degree. records all received output in the file, including typing errors, backspaces, and cursor motions. Note that it does not record typed char- acters; only echoed characters. Thus passwords are not recorded in the file. Responses other than simple echoes (such as output from screen-oriented editors and command editing) are recorded as they appeared in the original session. When there is no input flow control is not set), there can be some data loss while using However, script(1) can behave unexpectedly, if is set and is not set. AUTHOR
was developed by the University of California, Berkeley and HP. script(1)
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