[Solved] variable expansion inside a here-file issue

[aus9]

Hi

most tiimes, a script that cats a line of text into a /pathway2/file works for me.

I am close on this one
all the lines in a terminal look like
> line1
> line 2 etc
my script is also pasting a tce.install script so I use EOF and that looks good as
> EOF

Up the top I change the demiliter to ZZZ and the rest of the lines look good until the last line
which reads as

> ZZZ
but that is supposed to be end of the file.

I have used ctrl + c to close down attempted input

Any clues ?
here is my top middle and bottom lines
( I have checked with echo that the variables are good)

cat > $P/usr/local/share/$P/files/$GET <<ZZZ

# tce.install
EOF

ZZZ

thanks for reading

[Paul_123]

It’s hard to follow script posts with very fragmented lines of code.  Post the full script or a bigger portion of the code.

[patrikg]

Have you tried to add it with double quotes like this example.

Code: (bash) [Select]

cat > /etc/resolv.conf << "EOF"
nameserver 8.8.8.8
nameserver 8.8.4.4
EOF


[jazzbiker]

I don't know whether I've understood the problem correctly but for me:

Code: [Select]

tc@box:~$ cat > bbb <<ZZZ
> cat > ccc <<EOF
> ls
> EOF
> ZZZ
tc@box:~$ cat bbb
cat > ccc <<EOF
ls
EOF
tc@box:~$ . ./bbb
tc@box:~$ cat ccc
ls

looks like nested here-files work.

[aus9]

Hi Rich
Please mark as solved.

The solution was a test based on patrikg reply but with a small change away from ZZZ

Code: [Select]

cd /tmp && sudo su

cat > test << "EOF2"
#!/bin/sh
# test we are root
if [ "$(id -u)" != "0" ]; then
   echo "run as root now exitting"
   exit 1
fi

P=get-chromium
TCDIR=/etc/sysconfig/tcedir/optional

# tce.install
###########
mkdir -p $P/usr/local/tce.installed
cat > $P/usr/local/tce.installed/$P << 'EOF'
#!/bin/sh
[  -f /var/run/dbus/pid ] || /usr/local/etc/init.d/dbus start
EOF
chown -R root:staff  $P/usr/local/tce.installed
chmod -R 775 $P/usr/local/tce.installed

# now we put into member's tcedir
cd $TCDIR
cp /tmp/$P.tcz*  .

EOF2Note that I am reluctant to post full code, as I am simple coder, I need to build the get TCE and then test it. I have a fair chance I need to improve it and do not want for others to point out all my mistakes....before I get a chance to see some for myself. 

Note this is a private TCE built for private purposes so I am allowed to autostart dbus for this target member group. The size of the download and the resultant TCE may scare some members on arm so I suspect very few will want it.

Thanks for reading

[Rich]

Hi aus9

Please mark as solved. ...

Done. 

[aus9]

Hi Rich sorry full script fails I am going to have to post it.
can you remove solved and in next post I will have to show full output

the end shows
> EOF2
I press enter expecting to return to prompt but what I see is
> EOF2
>

[aus9]

server error in attempting to post...so a clickable txt file link to show what I was attempting.

https://www.dropbox.com/scl/fi/bbkk2xfmh4uu555lmp2ye/forum.txt?rlkey=x7utnunbipvdkyrad68w2m8y5&dl=0

ok just spotted that my first echo has multiple double quotes..I will remove and retest
EDIT2 Nope still fails

my brain needs a rest. thanks for reading

[Rich]

Hi aus9

... can you remove solved ...

Removed. 

[jazzbiker]

Hi aus9,

In Your script You are assigning variables inside the here-file. This is funny and tricky but may cause brain damage )

Code: [Select]

tc@box:~$ cat aaa
cat > bbb << EOF2
N=abc
cat > $N << EOF
ls
EOF
EOF2
tc@box:~$ . ./aaa
tc@box:~$ cat bbb
N=abc
cat >  << EOF
ls
EOF

Can You rewrite Your script at least to move variables definitions out of the here-file fragment?

Welcome to hell scripting!

[Paul_123]

Variable expansion happens as the script is written too.  Can be really tricky

Why do you need to write the script from a script?  Can you just include the script as a file?

[aus9]

Thanks Paul_123
I am glad others are seeing some issue too.

Lets drop this. I can upload it as a file -> in my build script use wget to get it and include it the submission under src/

Hi jazzbiker
I try to have as much text stuff inside my build script. But I give up on this one.
The build script includes a help file, well more of a howto as I will be leaving it to the victim oops I mean the member to maintain their get-script 
and thanks for your feedback

Hi Rich
Please mark as solved and at your discretion change subject to something like
variable expansion inside a here-file issue or anything you think might better describe what happened.

[patrikg]

You could also test to use some another variable substitution, with the curly brackets.
Like this. or do you need the dollar sign variable in the script you make, you need to escape that character because of the variable substitution.

Code: (bash) [Select]

cat > ${N} << EOF


Code: (bash) [Select]

cat > \${N} << EOF

or like your way.

Code: (bash) [Select]

cat > \$N << EOF


[Rich]

Hi aus9

... Please mark as solved and at your discretion change subject to something like
variable expansion inside a here-file issue ...

Done.

[jazzbiker]

You could also test to use some another variable substitution, with the curly brackets.
Like this. or do you need the dollar sign variable in the script you make, you need to escape that character because of the variable substitution.

Code: (bash) [Select]

cat > ${N} << EOF


Code: (bash) [Select]

cat > \${N} << EOF

or like your way.

Code: (bash) [Select]

cat > \$N << EOF


Hi patrikg,

Sorry but not

Code: [Select]

tc@box:~$ cat aaa
cat > bbb << EOF2
N=abc
cat > ${N} << EOF
ls
EOF
EOF2
tc@box:~$ . ./aaa
tc@box:~$ cat bbb
N=abc
cat >  << EOF
ls
EOF

The issue aus9 faced is related to the variables expansion as Paul_123 noted. This is not syntax error. Don't sit to play dice with the devil. Simply don't do it )

Have a nice Core!