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if then else structure
Post 45635 by props on Saturday 27th of December 2003 03:01:48 AM
12-27-2003
if then else structure
echo name the file that you want to read
read answer
if [ $# = 0 ]
then
echo you must enter a file name
fi
cat $answer
im trying to catch the error if user forget to enter the name of the file
anyone can help me ?
thanks
read answer
if [ $# = 0 ]
then
echo you must enter a file name
fi
cat $answer
im trying to catch the error if user forget to enter the name of the file
anyone can help me ?
thanks
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LEARN ABOUT OSF1
line
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)