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How to Compare Null values??
Post 302317236 by Yagami on Monday 18th of May 2009 11:05:30 AM
05-18-2009
How to Compare Null values??
Hi,
Can someone help me comparing Null values.
Scenario is as follows:
I have a variable which "cache_prd" which can have either some integer or nothing(Null)
if it is integer I have to again do some comparision but these comparisons give me this error
"line 32: [: 95: unary operator expected"
To avoid this I used another variable chk= which has null value in it but again at some point when integer comes in variable it gives me same error.
Please suggest me how to catch this error.
Thanks in advance,
Yagami
Can someone help me comparing Null values.
Scenario is as follows:
I have a variable which "cache_prd" which can have either some integer or nothing(Null)
if it is integer I have to again do some comparision but these comparisons give me this error
"line 32: [: 95: unary operator expected"To avoid this I used another variable chk= which has null value in it but again at some point when integer comes in variable it gives me same error.
Please suggest me how to catch this error.
Thanks in advance,
Yagami
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LEARN ABOUT MOJAVE
slapd-null
SLAPD-NULL(5) File Formats Manual SLAPD-NULL(5) NAME
slapd-null - Null backend to slapd SYNOPSIS
/etc/openldap/slapd.conf DESCRIPTION
The Null backend to slapd(8) is surely the most useful part of slapd: - Searches return success but no entries. - Compares return compareFalse. - Updates return success (unless readonly is on) but do nothing. - Binds other than as the rootdn fail unless the database option "bind on" is given. - The slapadd(8) and slapcat(8) tools are equally exciting. Inspired by the /dev/null device. CONFIGURATION
This slapd.conf option applies to the NULL backend database. That is, it must follow a "database null" line and come before any subsequent "database" lines. Other database options are described in the slapd.conf(5) manual page. bind <on/off> Allow binds as any DN in this backend's suffix, with any password. The default is "off". EXAMPLE
Here is a possible slapd.conf extract using the Null backend: database null suffix "cn=Nothing" bind on ACCESS CONTROL
The null backend does not honor any of the access control semantics described in slapd.access(5). FILES
/etc/openldap/slapd.conf default slapd configuration file SEE ALSO
slapd.conf(5), slapd(8), slapadd(8), slapcat(8). OpenLDAP 2.4.28 2011/11/24 SLAPD-NULL(5)