Mrdogkick
asked on
basic unix help....
I have started the code below and am stuck. What I want it to do is in the function, tell it to add the 'text' (which the user inputs) to the begining of a file I have already created called 'text' which already contains numerous lines of text. Make any sense?
#!/bin/bash
function addText()
{
}
echo "Enter some text:"
read text
ASKER
I put this in
$file=/home/hussain.ahmed/
but it says this
firstline: line 3: =/home/hussain.ahmed/cours
$file=/home/hussain.ahmed/
but it says this
firstline: line 3: =/home/hussain.ahmed/cours
Can you show the script and how you run it?
ASKER
the code is below and I am running it by doing the following:
sh firstline
sh firstline
#!/bin/bash
$file=/home/hussain.ahmed/coursework/chapter7/text
function addText()
{
echo $text > /tmp/f.$$
cat $file >> /tmp/f.$$
mv /tmp/f.$$ $file
}
echo "Enter some text:"
read text
addText
Remove the $ from $file=/home/hussain.ahmed/
#!/bin/bash
file=/home/hussain.ahmed/c
function addText()
{
echo $text > /tmp/f.$$
cat $file >> /tmp/f.$$
mv /tmp/f.$$ $file
}
echo "Enter some text:"
read text
addText
#!/bin/bash
file=/home/hussain.ahmed/c
function addText()
{
echo $text > /tmp/f.$$
cat $file >> /tmp/f.$$
mv /tmp/f.$$ $file
}
echo "Enter some text:"
read text
addText
ASKER
perfect, thanks a lot mate! One more thing. Is there a way I could append the text to the middle of the file??
Yes
length=`cat $file | wc -l`
mid=`expr $length / 2`
ed $file << END
$mid
a
$text
.
w
q
END
length=`cat $file | wc -l`
mid=`expr $length / 2`
ed $file << END
$mid
a
$text
.
w
q
END
ASKER
where would that fit into the script?
ASKER CERTIFIED SOLUTION
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ASKER
perfect, thank you very much!
ASKER
could you please explain to me what you did in the solution. ie what does each line mean?
The code:
- calculate file length
- divide length by 2
- use ed editor to edit the file. The commands to ed are between << END and END.
You may refer to man ed to know how to use ed
- calculate file length
- divide length by 2
- use ed editor to edit the file. The commands to ed are between << END and END.
You may refer to man ed to know how to use ed
function addText()
{
echo $text > /tmp/f.$$
cat $file >> /tmp/f.$$
mv /tmp/f.$$ $file
}
echo "Enter some text:"
read text
addTex
Here file is a variable that contains file name