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07-23-2008
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Replace environment variables with sed
Hi,
I need to write a sed that replaces the value of all environment variables that have PASS in the name with ***** . I have a log file who prints the value of all environment variables ,including those who hold passwords. In the name of these variables I found always the PASS string, ex: OP_ORA_PASS, OP_DSU_PASS,etc. What I did until now is the next sed : sed 's/'"$OP_ORA_PASS"'/******/g;s/'"$DSU_ORA_PASS"'/******/g' I need an improvment so that the sed will check and replace all the variables with PASS in the name,kind of $*_PASS. Thank you for your help. 
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07-23-2008
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Please provide an example of your current logfile; otherwise, we're likely to miss a corner case.
Also, you say you're replacing the values of those variables, but it looks like you're just changing the name to "*****". So an example of ideal output from your logfile snippet would be appreciated, too.
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07-23-2008
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If I understand you right, you are going to add some filter into the print-env-var-script?!
If so, (assuming the environment printed out with variable names) you coud 'sed' for any line with substring 'PASS=' and replase following with '*****': Code:
> env | sed 's/^\(.*PASS=\).*/\1*****/' The same pipe you can add in command of executing the script; so it will filtering the script's output. If you do not have the variable's names (seems unbelievable), you can get all *PASS variables into a file or local variables and filtering printout in the way you already have, using retrieved values. . (By the way, having a variables in sed-command part it is better to use: ... sed "commands" file . ( - IMHO) ) For local variable: (I've used '*NAME' variables) Code:
> for ln in $(env|grep -i name); do
>> sed_cmd=$sed_cmd"s/${ln#*=}/*****/g; ";
>>done
>echo $sed_cmd
s/dstnsun0/*****/g;
s/geo_usa/*****/g;
s/dca0701/*****/g;
> env|sed "$sed_cmd" | grep -i name
MAPMARKER_RPC_HOSTNAME=*****
MAPMARKER_DBNAME=*****
LOGNAME=*****
Code:
>rm sed_cmd.t
> for ln in $(env|grep -i name); do ec "s/${ln#*=}/*****/g;">>sed_cmd.t; done
> env|sed -f sed_cmd.t | grep -i name
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07-24-2008
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Thank you Alex for the examples, its exactly what I needed.
I used sed 's/^\(.*PASS=\).*/\1*****/' and it did the job. Can you explain me what this sed contains? Or maybe give a link to read? I need to make an adaptation of it and I need to know more. I have the following line in the log : ORA_CONNECT_STRING=username value/password The username name is taken from the $USERNAME variable. How do I write the sed to change the password to *****? sed 's/^\(.*CONNECT_STRING='"$USERNAME"'/\).*/\1*****/' Is that correct ?
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07-27-2008
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Thank you Dan for your help.
I have another problem to resolve involving sed: In the log I have the following line : + sqlplus -S env10/env10pass@DBL9 I put : s/^\(.*+ sqlplus -S '"$ORA_USER"'\).*/\1\/\*******@'"$DB_NAME"'/ env10 is the value of $ORA_USER. Unfortunely this variable is an application-related one, and does not exist anymore when I execute the sed(after the log is writen). Because of this I get the following result : + sqlplus -s /****@DBL9 Thats because $ORA_USER is empty.... What I need is a sed that looks up the string : + sqlplus -S ,skips the rest until the / and then changes the string between the / and @ with ***** Thank you all for the help !
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07-27-2008
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Assuming your desired output is:
+ sqlplus -s env10/****@DBL9 you can try this: Code:
sed 's!\(.*/\).*\(@.*\)!\1****\2!'
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