I need to replace if ($_SESSION['POST']['*']==1){ with if (isset($_SESSION['POST']['*']) && $_SESSION['POST']['*']==1){
(I'm using * as a wild card)
I've tried sed -i "s/if ($_SESSION['POST']['.*']/if (isset($_SESSION['POST']['.*']) && $_SESSION['POST']['.*']/g" *.php and a few other variations without success.
Here goes...
sed "s/\(if (\)\(\$_SESSION\['POST']\['\([^']*\)']\)==1/\1isset(\2) \&\& \$_SESSION['POST']['\3']==1/" file
Using double quotes means that the $ symbols must be escaped, otherwise they will be interpreted as shell variables. The square brackets need to be escaped, otherwise they will be interpreted as the beginning of a range. It's OK to leave the closing square brackets as they are.
In order to capture the key, I have used a character class [^']*. This means zero or more characters that are not a single quote.
In the replacement, the captured groups (the parts between parentheses in the match) are referred to using \1, \2, etc.
Testing it out:
$ cat file
if ($_SESSION['POST']['foo']==1){
// do something
}
if ($_SESSION['POST']['bar']==1){
// do something else
}
$ sed "s/\(if (\)\(\$_SESSION\['POST']\['\([^']*\)']\)==1/\1isset(\2) \&\& \$_SESSION['POST']['\3']==1/" file
if (isset($_SESSION['POST']['foo']) && $_SESSION['POST']['foo']==1){
// do something
}
if (isset($_SESSION['POST']['bar']) && $_SESSION['POST']['bar']==1){
// do something else
}
By the way it makes the command a few characters shorter if you use extended regexp mode (-r or -E). In extended mode, the parentheses enclosing capture groups don't have to be escaped but literal ones do, so your command would then be:
sed -r "s/(if \()(\$_SESSION\['POST']\['([^']*)'])==1/\1isset(\2) \&\& \$_SESSION['POST']['\3']==1/" file
This sed should work:
s="if (\$_SESSION['POST']['name']==1){"
sed -r 's/(if +)\((([^=]+)[^\)]+)/\1(isset(\3) \&\& \2/' <<< "$s"
if (isset($_SESSION['POST']['name']) && $_SESSION['POST']['name']==1){
PS: Use sed -E instead of sed -r on OSX.
Here's another.
This is what we need to produce:
Pattern: if (\$_SESSION\['POST'\]\['\([^']*\)'\]
Replacement: if (isset($_SESSION['POST']['\1']) \&\& $_SESSION['POST']['\1']
When quoted in shell level:
Pattern: "if (\\\$_SESSION\['POST'\]\['\([^']*\)'\]"
Replacement: "if (isset(\$_SESSION['POST']['\1']) \\&\\& \$_SESSION['POST']['\1']"
Putting it together:
sed -i "s|if (\\\$_SESSION\['POST'\]\['\([^']*\)'\]|if (isset(\$_SESSION['POST']['\1']) \\&\\& \$_SESSION['POST']['\1']|g" file
Test:
# sed "s|if (\\\$_SESSION\['POST'\]\['\([^']*\)'\]|if (isset(\$_SESSION['POST']['\1']) \\&\\& \$_SESSION['POST']['\1']|g" <<'EOF'
> if ($_SESSION['POST']['ABC']==1){
> EOF
if (isset($_SESSION['POST']['ABC']) && $_SESSION['POST']['ABC']==1){
Related
There is a command to replace bbb to ccc, if the line contains abc.
echo "abc yyy bbb xzy" | sed -e "/abc/ s/bbb/ccc/"
Does anyone know what the command would be, if I want to do the replacement, only if the line contains both abc and xyz?
Because it doesn't matter which one is matched first, you can look for abc first, then make the substitution if also xyz matches1:
sed '/abc/{/xyz/s/bbb/ccc/}'
or, considerably less elegant:
sed '/abc.*xyz\|xyz.*abc/s/bbb/ccc/'
but no nesting.
1BSD sed requires a semicolon before the closing brace.
Just use awk and you can code it as you'd write it, with && between the conditions:
awk '/abc/ && /xyz/ { sub(/bbb/,"ccc") } 1'
Try writing:
awk '(/abc/ && /xyz/) || (/def/ && (/ghi/ || /klm/)) { sub(/bbb/,"ccc") } 1'
or any other more interesting compound condition with sed. Awk is available everywhere sed is and the above is fully portable and will work as-is in every awk in every UNIX installation.
I am new in bash, so excuse me if do not use the right terms.
I need to substitute certain patterns of six characters in a set of files. The order by patterns are substituted depends on the beginning of each string of text.
This is an example of input:
chr1:123-123 5GGGTTAGGGTTAGGGTTAGGGTTAGGGTTA3
chr1:456-456 5TTAGGGTTAGGGTTAGGGTTAGGGTTAGGG3
chr1:789-789 5GGGCTAGGGTTAGGGTTAGGGTTA3
chr1:123-123 etc is the name of the string, they are separated from the string I need to work with by a tab. The string I need to work with is delimited by characters 5 and 3, but I can change them.
I want that all patterns containing T, A, G in anyone of these orders is substituted with X: TTAGGG, TAGGG, AGGGTT, GGGTTA, GGTTAG, GTTAGG.
Similarly, patterns containing CTAGGG, like row 3, in orders similar to the previous one will be substituted with a different character.
The game is repeated with some specific differences for all the 6 characters composing each pattern.
I started writing something like this:
#!/bin/bash
NORMAL=`echo "\033[m"`
RED=`echo "\033[31m"` #red
#read filename for the input file and create a copy and a folder for the output
read -p "Insert name for INPUT file: " INPUT
echo "Creating OUTPUT file " "${RED}"$INPUT"_sub.txt${NORMAL}"
mkdir -p ./"$INPUT"_OUTPUT
cp $INPUT.txt ./"$INPUT"_OUTPUT/"$INPUT"_sub.txt
echo
#start the first set of instructions
perfrep
#starting a second set of instructions to substitute pattern with one difference from TTAGGG
onemism
Instructions are
perfrep() {
sed -i -e 's/TTAGGG/X/g' ./"$INPUT"_OUTPUT/"$INPUT"_sub.txt
sed -i -e 's/TAGGGT/X/g' ./"$INPUT"_OUTPUT/"$INPUT"_sub.txt
sed -i -e 's/AGGGTT/X/g' ./"$INPUT"_OUTPUT/"$INPUT"_sub.txt
sed -i -e 's/GGGTTA/X/g' ./"$INPUT"_OUTPUT/"$INPUT"_sub.txt
sed -i -e 's/GGTTAG/X/g' ./"$INPUT"_OUTPUT/"$INPUT"_sub.txt
sed -i -e 's/GTTAGG/X/g' ./"$INPUT"_OUTPUT/"$INPUT"_sub.txt
}
# starting a second set of instructions to substitute pattern with one difference from TTAGGG
onemism(){
sed -i -e 's/[GCA]TAGGG/L/g' ./"$INPUT"_OUTPUT/"$INPUT"_sub.txt
sed -i -e 's/G[GCA]TAGG/L/g' ./"$INPUT"_OUTPUT/"$INPUT"_sub.txt
sed -i -e 's/GG[GCA]TAG/L/g' ./"$INPUT"_OUTPUT/"$INPUT"_sub.txt
sed -i -e 's/GGG[GCA]TA/L/g' ./"$INPUT"_OUTPUT/"$INPUT"_sub.txt
sed -i -e 's/AGGG[GCA]T/L/g' ./"$INPUT"_OUTPUT/"$INPUT"_sub.txt
sed -i -e 's/TAGGG[GCA]/L/g' ./"$INPUT"_OUTPUT/"$INPUT"_sub.txt
}
I will need to repeat also with T[GCA]AGGG, TT[TCG]GGG, TTA[ACT]GG, TTAG[ACT]G and TTAGG[ACT].
Using this procedure, I get for these results for the inputs shown
5GGGXXXXTTA3
5XXXXX3
5GGGLXXTTA3
In my point of view, for my job, the first and second string are both made by X repeated five times, and the order of characters is just slightly different. On the other hand, the third one could be masked like this:
5LXXX3
How do I tell the script that if the string starts with 5GGGTTA instead of 5TTAGGG must start to substitute with
sed -i -e 's/GGGTTA/X/g' ./"$INPUT"_OUTPUT/"$INPUT"_sub.txt
instead of
sed -i -e 's/TTAGGG/X/g' ./"$INPUT"_OUTPUT/"$INPUT"_sub.txt
?
I will need to repeat with all cases; for instance, if the string starts with GTTAGG I will need to start with
sed -i -e 's/GTTAGG/X/g' ./"$INPUT"_OUTPUT/"$INPUT"_sub.txt
and so on, and add a couple of variation of my pattern.
I need to repeat the substitution with TTAGGG and the variations for all the rows of my input file.
Sorry for the very long question. Thank you all.
Adding information asked by Varun.
Patterns of 6 characters would be TTAGGG , [GCA]TAGGG , T[GCA]AGGG , TT[TCG]GGG , TTA[ACT]GG , TTAG[ACT]G , TTAGG[ACT].
Each one must be checked for a different frame, for instance for TTAGGG we have 6 frames TTAGGG , GTTAGG , GGTTAG, GGGTTA , AGGGTT , TAGGGT.
The same frames must be applied to the pattern containing a variable position.
I will have a total of 42 patterns to check, divided in 7 groups: one containing TTAGGG and derivative frames, 6 with the patterns with a variable position and their derivatives.
TTAGGG and derivatives are the most important and need to be checked first.
#! /usr/bin/awk -f
# generate a "frame" by moving the first char to the end
function rotate(base){ return substr(base,2) substr(base,1,1) }
# Unfortunately awk arrays do not store regexps
# so I am generating the list of derivative strings to match
function generate_derivative(frame,arr, i,j,k,head,read,tail) {
arr[i]=frame;
for(j=1; j<=length(frame); j++) {
head=substr(frame,1,j-1);
read=substr(frame,j,1);
tail=substr(frame,j+1);
for( k=1; k<=3; k++) {
# use a global index to simplify
arr[++Z]= head substr(snp[read],k,1) tail
}
}
}
BEGIN{
fs="\t";
# alternatives to a base
snp["A"]="TCG"; snp["T"]="ACG"; snp["G"]="ATC"; snp["C"]="ATG";
# the primary target
frame="TTAGGG";
Z=1; # warning GLOBAL
X[Z] = frame;
# primary derivatives
generate_derivative(frame, X);
xn = Z;
# secondary shifted targets and their derivatives
for(i=1; i<length(frame); i++){
frame = rotate(frame);
L[++Z] = frame;
generate_derivative(frame, L);
}
}
/^chr[0-9:-]*\t5[ACTG]*3$/ {
# because we care about the order of the prinary matches
for (i=1; i<=xn; i++) {gsub(X[i],"X",$2)}
# since we don't care about the order of the secondary matches
for (hit in L) {gsub(L[hit],"L",$2)}
print
}
END{
# print the matches in the order they are generated
#for (i=1; i<=xn; i++) {print X[i]};
#print ""
#for (i=1+xn; i<=Z; i++) {print L[i]};
}
IFF you can generate a static matching order you can live with then
something like the above Awk script could work. but you say the primary patterns should take precedence and that a secondary rule would be better applied first in some cases. (no can do).
If you need a more flexible matching pattern I would suggest looking at "recursive decent parsing with backtracking" Or "parsing expression grammars".
But then you are not in a bash shell anymore.
I'm using OS X, want to replace
[self.lang getAppLanguageString:#"foo bar"]
to
LocalizedString(#"foo bar", nil)
I use sed like the below:
sed -i '' s/[self\.lang getAppLanguageString:#"([a-zA-Z]+)"]/LocalizedString(#"\1", nil)/g somefile
but not work, how can I do that?
You've already escaped . in the pattern, but also need to escape [ and ].
Try:
sed -i 's/\[self\.lang getAppLanguageString:#\("[^"]*"\)\]/LocalizedString(#\1, nil)/' somefile
I want to read from the file /etc/lvm/lvm.conf and check for the below pattern that could span across multiple lines.
tags {
hosttags = 1
}
There could be as many white spaces between tags and {, { and hosttags and so forth. Also { could follow tags on the next line instead of being on the same line with it.
I'm planning to use awk and sed to do this.
While reading the file lvm.conf, it should skip empty lines and comments.
That I'm doing using.
data=$(awk < cat `cat /etc/lvm/lvm.conf`
/^#/ { next }
/^[[:space:]]*#/ { next }
/^[[:space:]]*$/ { next }
.
.
How can I use sed to find the pattern I described above?
Are you looking for something like this
sed -n '/{/,/}/p' input
i.e. print lines between tokens (inclusive)?
To delete lines containing # and empty lines or lines containing only whitespace, use
sed -n '/{/,/}/p' input | sed '/#/d' | sed '/^[ ]*$/d'
space and a tab--^
update
If empty lines are just empty lines (no ws), the above can be shortened to
sed -e '/#/d' -e '/^$/d' input
update2
To check if the pattern tags {... is present in file, use
$ tr -d '\n' < input | grep -o 'tags\s*{[^}]*}'
tags { hosttags = 1# this is a comment}
The tr part above removes all newlines, i.e. makes everything into one single line (will work great if the file isn't to large) and then search for the tags pattern and outputs all matches.
The return code from grep will be 0 is pattern was found, 1 if not.
Return code is stored in variable $?. Or pipe the above to wc -l to get the number of matches found.
update3
regex for searcing for tags { hosttags=1 } with any number of ws anywhere
'tags\s*{\s*hosttags\s*=\s*1*[^}]*}'
try this line:
awk '/^\s*#|^\s*$/{next}1' /etc/lvm/lvm.conf
One could try preprocessing the file first, removing commments and empty lines and introducing empty lines behind the closing curly brace for easy processing with the second awk.
awk 'NF && $1!~/^#/{print; if(/}/) print x}' file | awk '/pattern/' RS=
How do I match a case insensitive regex and delete it at the same time
I read that to get case insensitive matches, use the flag "i"
sed -e "/pattern/replace/i" filepath
and to delete use d
sed -e "/pattern/d" filepath
I've also read that I could combine multiple flags like 2iw
I'd like to know if sed could combine both i and d
I've tried the following but it didn't work
sed -e "/pattern/replace/id" filepath > newfilepath
For case-insensitive use /I instead of /i.
sed -e "/pattern/Id" filepath
you can use (g)awk as well.
# print case insensitive
awk 'BEGIN{IGNORECASE=1}/pattern/{print}' file
# replace with case insensitive
awk 'BEGIN{IGNORECASE=1}/pattern/{gsub(/pattern/,"replacement")}1' file
OR just with the shell(bash)
#!/bin/bash
shopt -s nocasematch
while read -r line
do
case "$line" in
*pattern* ) echo $line;
esac
done <"file"
I produced this one-liner because Ansible cannot handle different lv with the same name. This convert near CSV into perfect JSON. Possibly, you want to change the -F flag to change the field separator.
lvs | perl -ane '
local %tmp,$i=0;
while($i<#f){
$tmp{$f[$i]}=$F[$i] if $F[$i];
$i++
};
if(#f){push #ans,\%tmp}
else{ #f=#F };
END { print to_json(\#ans,{pretty=>1}) }
' -MJSON