If condition to check null variable Post: 302831399

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check for NULL variable

Hello I want to check for NULL variable.. but this is not working..please help thanks in advance esham

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Hi, i wrote If Conditions in my script, it's returns null and some values. but i am unable to find when Null value getting. bec we need modification according null vales. pls help me on this.

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korn shell If then update_smartcare_user_password "$u_id" else echo "Not a database user" fi i get this error Syntax error at line *** : `then' is not expected. what should i do. I want to check whether $a is null or not.

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check for null

hi, i have 3 lines of output , if second line exists then only condition within the if loop has to exeute other wise it has exit from loop. i had tried like this but not getting please help me ... Code: if ; then echo "success" else echo "" Use code tags please,...

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Check for null

Hi Champs!!! im a newbie in unix, need ur expert help for my problem... I need to search if there are any "NULL" entries in the string String without Null Str1: 203652|1000003653|tellt|RUPV|4649|1|07/28/2011 01:56:12 String with Null (RUPV is removed) Str2:...

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HELP with AWK one-liner. Need to employ an If condition inside AWK to check for array variable ?

Hello experts, I'm stuck with this script for three days now. Here's what i need. I need to split a large delimited (,) file into 2 files based on the value present in the last field. Samp: Something.csv bca,adc,asdf,123,12C bca,adc,asdf,123,13C def,adc,asdf,123,12A I need this split...

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Checking for null condition in a UNIX variable

i have this code for i in `cat sql_output.txt` do -- some script commands done sql_output.txt has 1 column with employee_ids If the sql_output.txt is null then the do loop should not execute. How can i implement this. for i in `cat sql_output.txt` If i is null or empty then ...

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dp

dp(8mh) 																   dp(8mh)

Name
       dp - parse dates RFC 822-style

Syntax
       /usr/lib/mh/dp [ -form file ] [ -format string ] [ -help ] [ -width columns ] dates

Description
       The command parses dates according to the ARPA Internet standard.  It also understands many non-standard formats, such as those produced by
       TOPS-20 sites and some UNIX sites using It is useful for seeing how MH will interpret a date.

       The program treats each argument as a single date, and prints the date out in the official RFC 822 format.  Hence, it is  usually  best	to
       enclose each argument in double quotes (") for the shell.

Options
       -form file
		 Overrides the default output format of The output is formatted according to the instructions in the specified file.  This must be
		 a format file; see

       -format string
		 Overrides the default output format of The output is formatted according to the instructions in the specified string.	This  must
		 be a format string; see

		 The  argument to the -format option must be interpreted as a single token by the shell that invokes Therefore, you should usually
		 place the argument to this option inside double quotes (").

       -help	 Prints a list of the valid options to this command.

       -width columns
		 Specifies the width of the screen in columns.

       The defaults for this command are as follows:

	      -width defaults to the width of the terminal

Examples
       This is the default format string used by
       %<(nodate{text})error: %{text}%|%(pretty{text})%>

       When an error is detected, this prints error: and the date that is in error.  Otherwise, it outputs the proper RFC 822 format of the date.

Files
       User profile.

See Also
       ap(8mh)
       Standard for the Format of ARPA Internet Text Messages (RFC 822)

																	   dp(8mh)

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check for NULL variable

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