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Top Forums Shell Programming and Scripting Sed/grep: check if line exists, if not add line? Post 303013259 by f77hack on Monday 19th of February 2018 01:03:06 AM
Old 02-19-2018
Sed/grep: check if line exists, if not add line?

Hello,
I'm trying to figure out how to speed up the following as I want to use multiple commands to search thousands of files.

is there a way to speed things up?

Example I want to search a bunch of files for a specific line, if this line already exists do nothing, if it doesn't exist add it below

So far I have

Code:
searchString="PortSystem 1.0"

addString="PortGroup user 1.0"
file="Portfile"
export -f doStuff
find . -depth  -name ${file} -type f -exec bash -c 'doStuff "$0"' {} \;

function doStuff(){
if grep -Fxq "$searchString" ${1:-} 
then   
sed '/$searchString/s/.*/&\n$addString' ${1:-}  
fi  
return 0
}

Thanks

Last edited by f77hack; 02-19-2018 at 02:10 AM.. Reason: typos
 

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LOGPROF.CONF(5) 						     AppArmor							   LOGPROF.CONF(5)

NAME
logprof.conf - configuration file for expert options that modify the behavior of the AppArmor logprof(1) program. DESCRIPTION
The logprof(1) program can be configured to have certain default behavior by the contents of logprof.conf. The [qualifiers] section lists specific programs that should have a subset of the full ix/px/ux list when asking what mode to execute it using. Since creating a separate profile for /bin/bash is dangerous, we can specify that for /bin/bash, only (I)nherit, (U)nconstrained, and (D)eny should be allowed options and only those will show up in the prompt when we're asking about adding that to a profile. Likewise, if someone currently exec's /bin/mount in ix or px mode, things won't work, so we can provide only (U)nconstrained and (D)eny as options. And certain apps like grep, awk, sed, cp, and mkdir should always inherit the parent profile rather than having their own profile or running unconfined, so for them we can specify that only (I)nherit and (D)eny are the allowed options. Any programs that are not listed in the qualifiers section get the full (I)nherit / (P)rofile / (U)nconstrained / (D)eny option set. If the user is doing something tricky and wants different behavior, they can tweak or remove the corresponding line in the conf file. The [defaulthat] section lists changehat-aware programs and what hat logprof(1) will collapse the entries to for that program if the user specifies that the access should be allowed, but should not have it's own hat. The [globs] section allows modification of the logprof rule engine with respect to globbing suggestions that the user will be prompted with. The format of each line is-- "<perl glob> = <apparmor glob>". When logprof(1) asks about a specific path, if the perl glob matches the path, it replaces the part of the path that matched with the corresponding apparmor glob and adds it to the list of globbing suggestions. Lines starting with # are comments and are ignored. EXAMPLE
[qualifiers] # things will very likely be painfully broken if bash has it's own profile /bin/bash = iu # mount doesn't work if it's confined /bin/mount = u # these helper utilities should inherit the parent profile and # shouldn't have their own profiles /bin/awk = i /bin/grep = i /bin/sed = i [defaulthat] /usr/sbin/sshd = EXEC /usr/sbin/httpd2 = DEFAULT_URI /usr/sbin/httpd2-prefork = DEFAULT_URI [globs] # /foo/bar/lib/libbaz.so -> /foo/bar/lib/lib* /lib/lib[^/]+so[^/]*$ = /lib/lib*so* # strip kernel version numbers from kernel module accesses ^/lib/modules/[^/]+/ = /lib/modules/*/ # strip pid numbers from /proc accesses ^/proc/d+/ = /proc/*/ BUGS
None. Please report any you find to bugzilla at <http://bugzilla.novell.com>. SEE ALSO
apparmor(7), apparmor.d(5), enforce(1), change_hat(2), complain(1), logprof(1), genprof(1), and <http://forge.novell.com/modules/xfmod/project/?apparmor>. NOVELL
/SUSE 2007-04-03 LOGPROF.CONF(5)
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