08-30-2011
How can I add a newline In a text file using Shell Script
Good day ...
Well i do have this project in school, in our Principles Of Operating System Class
We are using Cygwin....
And our project goes like this...
Create a dictionary using cygwin. Display the following menu at the start of
execution
1-add a word in the dictionary # specify the meaning
2-search a word # if word exists, show the meaning of the word
2-delete a word
4-delete all words in the dictionary
#NOTE: The program should ask the user if he wishes to continue or not.
And here is my Code....
ans=yes
while [ $ans = yes ]
do
echo 1-Add a word in the dictionary
echo 2-Search a word in the dictionary
echo 3-Delete a word in the dictionary
echo 4-Delete all words in the dictionary
echo -n "Choose which to execute: "
read ENTRY
case $ENTRY in
1)
echo -n "Enter a word: "
read word
echo $word " " | cat >> word.txt
echo -n "Enter the meaning: "
read meaning
echo $meaning | cat >> word.txt
;;
2)
SUCCESS=0
echo -n "Enter the word to search: "
read word
grep -q "$word" "word.txt"
if [ $? -eq $SUCCESS ]
then
awk "/$word/" word.txt
else
echo Word not found!
fi
;;
3)
#I still don't know what code to delete a word from the textfile
#If you can supply a good code to delete a word, that would be a big help
;;
4)
echo | cat > word.txt | echo Successfully Deleted!
;;
echo -n "Do you want to continue?yes or no: "
read ans
done
In the case 1 , I wanted that everytime I save a word & meaning to a notepad it
would appear like this in the notepad
#example
Clandestine means Secret
Loquacious means Talkative
but in my code, it appears like this in the notepad
#example
Clandestine means Secret Loquacious means Talkative
Does anyone know what is the code for my desired output in the notepad in case 1?
Can anybody help me with my code , especially in case 1 and case 3?
Your immediate response regarding this matter is so much appreciated
Thank you so much in advance ^_^ God bless ....
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LEARN ABOUT DEBIAN
plan9-grep
GREP(1) General Commands Manual GREP(1)
NAME
grep, g - search a file for a pattern
SYNOPSIS
grep [ option ... ] pattern [ file ... ]
g [ option ... ] pattern [ file ... ]
DESCRIPTION
Grep searches the input files (standard input default) for lines that match the pattern, a regular expression as defined in regexp(7) with
the addition of a newline character as an alternative (substitute for |) with lowest precedence. Normally, each line matching the pattern
is `selected', and each selected line is copied to the standard output. The options are
-c Print only a count of matching lines.
-h Do not print file name tags (headers) with output lines.
-e The following argument is taken as a pattern. This option makes it easy to specify patterns that might confuse argument parsing,
such as -n.
-i Ignore alphabetic case distinctions. The implementation folds into lower case all letters in the pattern and input before interpre-
tation. Matched lines are printed in their original form.
-l (ell) Print the names of files with selected lines; don't print the lines.
-L Print the names of files with no selected lines; the converse of -l.
-n Mark each printed line with its line number counted in its file.
-s Produce no output, but return status.
-v Reverse: print lines that do not match the pattern.
-f The pattern argument is the name of a file containing regular expressions one per line.
-b Don't buffer the output: write each output line as soon as it is discovered.
Output lines are tagged by file name when there is more than one input file. (To force this tagging, include /dev/null as a file name
argument.)
Care should be taken when using the shell metacharacters $*[^|()= and newline in pattern; it is safest to enclose the entire expression in
single quotes '...'. An expression starting with '*' will treat the rest of the expression as literal characters.
G invokes grep with -n and forces tagging of output lines by file name. If no files are listed, it searches all files matching
*.C *.b *.c *.h *.m *.cc *.java *.cgi *.pl *.py *.tex *.ms
SOURCE
/src/cmd/grep
/bin/g
SEE ALSO
ed(1), awk(1), sed(1), sam(1), regexp(7)
DIAGNOSTICS
Exit status is null if any lines are selected, or non-null when no lines are selected or an error occurs.
GREP(1)