How can I do these in sed?
#input #output
file.txt "nothing"
dir1/ ../
dir1/file.txt ../
dir1/dir2/ ../../
dir1/dir2/file.txt ../../
Let's say #input is placed to $var1
sed "do something" <<< $var1
echo $var1
You can try this GNU sed
sed "s#dir[0-9]\+/*#\.\./#g; s#file\.txt##g"
Is your test for dir1/dir2 (without trailing slash) correct? How does sed know if dir2 is a file or a directory? Otherwise you could use:
echo "dir1/dir2/file.txt" | sed s#[^/]*/#../#g | sed 's#[^/]*$##'
Related
I want to add few in a file. Is it possible to use sed?
original file
test1
test2
test3
Expected output after adding the new line
test1
#
testing123
#
test3
If you don't mind using "while/read" instead of "sed", this is one solution:
[~]$ cat original.txt
test1
test2
test3
[~]$ cat new_content.txt
#
testing123
#
Then, process both files with the following script:
script.sh
#!/bin/bash
while IFS= read -r line
do
if [[ $line =~ ^test2.*$ ]]
then
cat new_content.txt
else
echo "$line"
fi
done < original.txt
sed '2 i\
\
#
2 a\
#\
' YourFile
Arbitrary take the line 2 as middle (not easy to count or take middle in posix sed)
ifor insert (before)
a for append (after)
I have a example cut down from a log file.
112 172.172.172.1#50912 (ssl.bing.com):
I would like some how to remove the # and numbers after and (): from the url.
Would like the result.
112 172.172.172.1 ssl.bing.com
Here is the sed oneliner I have been working on.
cat newdns.log | sed -e 's/.*query: //' | cut -f 1 -d' ' | sort | uniq -c | sort -k2 > old.log
Thanks
Using sed, you could say:
sed 's/#[0-9]*//;s/(\(.*\)):$/\1/' filename
or, in a single substitution:
sed 's/#[0-9]* *(\(.*\)):$/ \1/' filename
Another sed:
sed -r 's/#[^ ]+|[():]//g'
$ echo '112 172.172.172.1#50912 (ssl.bing.com):' | sed -r 's/#[^ ]+|[():]//g'
112 172.172.172.1 ssl.bing.com
I have the following line in a Perl script:
my $temp = `sed 's/ /\n/g' /sys/bus/w1/devices/w1_bus_master1/10-000802415bef/w1_slave | grep t= | sed 's/t=//'`;
Which throws up the error:
"sed: -e expression #1, char 2: unterminated `s' command"
If I run a shell script as below it works fine:
temp1=`sed 's/ /\n/g' /sys/bus/w1/devices/w1_bus_master1/10-000802415bef/w1_slave | grep t= | sed 's/t=//'`
echo $temp1
Anyone got any ideas?
Perl interpretes your \n as a literal newline character. Your command line will therefore look something like this from sed's perspective:
sed s/ /
/g ...
which sed doesn't like. The shell does not interpret it that way.
The proper solution is not to use sed/grep in such a situation at all. Perl is, after all, very, very good at handling text. For example (untested):
use File::Slurp;
my #lines = split m/\n/, map { s/ /\n/g; $_ } scalar(read_file("/sys/bus...));
#lines = map { s/t=//; $_ } grep { m/t=/ } #lines;
Alternatively escape the \n once, e.g. sed 's/ /\\n/g'....
You need to escape the \n in our first regular expression. The backtick-operator in perl thinks it is a control-character and inserts a newline instead of the string \n.
|
V
my $temp = `sed 's/ /\\n/g' /sys/bus/ # ...
I want to replace path in
(setq myFile "/some/path")
in a file. I tried to do it with sed:
find ./_build/html -type f -name '*.html' | while read myFile; do
MyFile=`readlink -f "$myFile"`
sed -i "s/setq myFile [)]*/setq myFile \"$MyFile\"/" sphinx_nowrap.el
# and then some actions on file
done
and with perl:
find ./_build/html -type f -name '*.html' | while read myFile; do
MyFile=`readlink -f "$myFile"`
perl -ne "s/setq myFile .+/setq myFile \"$MyFile\")/" sphinx_nowrap.el
# and then some actions on file
done
but both give errors.
I've read this and this and also this -- but can't make it work.
Edit:
Here's a perl error:
Having no space between pattern and following word is deprecated at -e line 1.
Bareword found where operator expected at -e line 1, near "s/setq myFile .+/setq myFile "/home"
String found where operator expected at -e line 1, at end of line
(Missing semicolon on previous line?)
syntax error at -e line 1, near "s/setq myFile .+/setq myFile "/home"
Can't find string terminator '"' anywhere before EOF at -e line 1.
and here's sed error:
sed: -e expression #1, char 34: unknown option to `s'
Edit 2:
So the solution is to change the delimeter char. And also sed expression should be changed:
sed -i "s!setq myFile .*!setq myFile \"$MyFile\")!" sphinx_nowrap.el
Looks like perl (and sed) recognizes the slash in the file path as the regex delimiter. You can use a different delimiter:
find ./_build/html -type f -name '*.html' | while read myFile; do
MyFile=`readlink -f "$myFile"`
perl -ne "s!setq myFile .+!setq myFile \"$MyFile\")!" sphinx_nowrap.el
# and then some actions on file
done
or for sed:
find ./_build/html -type f -name '*.html' | while read myFile; do
MyFile=`readlink -f "$myFile"`
sed -i "s!setq myFile [)]*!setq myFile \"$MyFile\"!" sphinx_nowrap.el
# and then some actions on file
done
Lets assume your $MyPath hold /foo/bar/baz. Then the Perl code reads as:
perl -ne "s/setq myFile .+/setq myFile \"/foo/bar/baz\")/" sphinx_nowrap.el
Your Regex is terminated with the third / character. To work around this, we can use another delimiter like s{}{}:
perl -ine "s{setq myFile .+}{setq myFile \"/foo/bar/baz\")}; print" sphinx_nowrap.el
I also added the -i Option (inplace editing) and a print statement so that something actually gets print out.
But probably it would be more elegant to pass the value aof $MyPath as a command line argument:
perl -ne 's{setq myFile .+}{setq myFile "$ARGV[0]")}; print' $MyPath <sphinx_nowrap.el >sphinx_nowrap.el
New to sed and could use some help.
I would like to turn this "a/b/c a/b/c" into this "a/b/c a-b-c".
where a/b/c is any path.
thanks
Give this a try:
sed 'h; s/ .*//; x; s/.* //; s:/:-:g; x; G; s/\n/ /'
Since you want to use whitespace to delemit, I'd just use perl:
perl -ane '$F[1] =~ s/\//-/; print "#F\n"'
you can use awk,
$ echo "a/b/c a/b/c" | awk '{gsub("/","-",$NF)}1'
a/b/c a-b-c
This might work:
echo "a/b/c a/b/c" | sed ':a;s|\(.* [^/]*\)/|\1-|;ta'
a/b/c a-b-c
Or this:
echo "a/b/c a/b/c" | sed 's/.* //;h;y/\//-/;x;G;y/\n/ /'
a/b/c a-b-c