egrep string except when preceded by underscore

danmauer · #1 (**permalink**) 09-30-2009

having trouble with this seemingly simple taks..

Test data:

Quote:

${DB2HOME}/load_${Gmdsschema}.crnt_rgn_trunc_${SYS_FILE_DATE}
replace into ${Gmdsschema}.crnt_rgn
${Gmdsschema}.crnt_rgn
${DB2HOME}/load_${Gmdsschema}.crnt ${Gmdsschema}.base_rgn

we want to keep lines 2,3 & 4

-- want to exclude when ${.*schema} is preceded with an underscore; Valid {.*schema} should always be preceded spaces or be found at the beginning of a line.

Code:

 
egrep "[^_][$]{.*schema}\."

I would like to thank whomever looks at this in advance for your time .

Scrutinizer · #2 (**permalink**) 09-30-2009

Code:

egrep '^\${[^}]*schema}|[^_]\${[^}]*schema}'

Scrutinizer · #3 (**permalink**) 10-01-2009

or :

Code:

egrep '(^|[^_])\${[^}]*schema}'

edidataguy · #4 (**permalink**) 10-01-2009

Won't this not work for you?

Code:

fgrep '_${' file

Scrutinizer · #5 (**permalink**) 10-02-2009

Quote:

Originally Posted by edidataguy

Won't this not work for you?

Code:

fgrep '_${' file

Hi editaguy, the OP was trying to match patterns without the preceding underscore. They should also be matched when at the beginning of a line.

edidataguy · #6 (**permalink**) 10-03-2009

Quote:

Originally Posted by Scrutinizer

Hi editaguy, the OP was trying to match patterns without the preceding underscore. They should also be matched when at the beginning of a line.

Oooops....sorry some how I missed it.
Then will this work?

Code:

sed '/_\${.*schema}/ {/ \${.*schema}/!d;}' file

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