05-16-2008
Use of index in UNIX shell scripting
I have following line of code with me in one of the shell script.
LIST=`awk -v SRV=$SRV -v GRP=$GRP -v ID=$ID '{ if (index($0, GRP) && index($0, SRV) == 2 )
Can anybody help me in understanding the code ? specifically the bold one
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LEARN ABOUT CENTOS
slapd-dnssrv
SLAPD-DNSSRV(5) File Formats Manual SLAPD-DNSSRV(5)
NAME
slapd-dnssrv - DNS SRV referral backend to slapd
SYNOPSIS
/etc/openldap/slapd.conf
DESCRIPTION
The DNSSRV backend to slapd(8) serves up referrals based upon SRV resource records held in the Domain Name System.
This backend is experimental.
CONFIGURATION
The DNSSRV backend has no backend nor database specific options. It is configured simply by "database dnssrv" followed a suffix directive,
e.g. suffix "".
ACCESS CONTROL
The dnssrv backend does not honor all ACL semantics as described in slapd.access(5). In fact, this backend only implements the search
operation when the manageDSAit control (RFC 3296) is used, otherwise for every operation a referral, whenever appropriate, or an error is
returned. Currently, there is no means to condition the returning of the referral by means of ACLs; no access control is implemented,
except for read (=r) access to the returned entries, which is actually provided by the frontend. Note, however, that the information
returned by this backend is collected through the DNS, so it is public by definition.
FILES
/etc/openldap/slapd.conf
default slapd configuration file
SEE ALSO
"OpenLDAP Root Service - An experimental LDAP referral service" [RFC 3088],
"OpenLDAP LDAP Root Service" <http://www.openldap.org/faq/?file=393)>,
slapd.conf(5), slapd(8)
OpenLDAP 2.4.39 2014/01/26 SLAPD-DNSSRV(5)