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Full Discussion: A logical problem.
Top Forums Shell Programming and Scripting A logical problem. Post 302407620 by vino on Friday 26th of March 2010 01:28:51 AM
Old 03-26-2010
Quote:
Originally Posted by dashok.83
I'm having a logical problem.Can anybody help me.

Code:
while [[ ! -e $ZipFile ]]
do
  echo " Enter the Zip File Name   : \c"
  read ZipFile
done

In the above snippet - I want it ask for file name first time and once validation fails, I want it add a msg that its entered file name doesn't exist and ten prompt for file name again.

Could be silly.- But it just that I not able get a logic for it.
Instead you could change the existing message to

Code:
while [[ ! -f $ZipFile ]]
do
  echo "Enter a valid Zip File Name   : \c"
  read ZipFile
done

 

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line(1) 						      General Commands Manual							   line(1)

NAME
line - Reads one line from standard input SYNOPSIS
line STANDARDS
Interfaces documented on this reference page conform to industry standards as follows: line: XCU5.0 Refer to the standards(5) reference page for more information about industry standards and associated tags. OPTIONS
None DESCRIPTION
The line command copies one line, up to and including a newline, from standard input and writes it to standard output. Use this command within a shell command file to read from your terminal. The line command always writes at least a newline character. NOTES
The line utility has no internationalization features and is marked LEGACY in XCU Issue 5. Use the read utility instead. EXIT STATUS
Success. End-of-File. EXAMPLES
To read a line from the keyboard and append it to a file, enter: echo 'Enter comments for the log:' echo ': c' line >>log This shell procedure displays the message: Enter comments for the log: It then reads a line of text from the keyboard and adds it to the end of the file log. The echo ': c' command displays a : (colon) prompt. See the echo command for information about the c escape sequence. SEE ALSO
Commands: echo(1), ksh(1), read(1), Bourne shell sh(1b), POSIX shell sh(1p) Functions: read(2) Standards: standards(5) line(1)
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