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Find Null values in Columns and fail execution by displaying error message

 
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Top Forums UNIX for Dummies Questions & Answers Find Null values in Columns and fail execution by displaying error message
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Old 04-08-2015
Two of your requirements (excluding headers and exit with code 16 if fields 2 or 3 are empty in a file) can be fulfilled easily with
Code:
awk     'function PR()  {print FILENAME, V?": Null values " V:": All records good."}

         FNR==1         {next}
         !$2            {V=102}
         !$3            {V=103}

         FNR==2 && NR>2 {PR(); if (V) exit 16}

        ' FS="," pf_[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9].csv

Unfortunately, awk doesn't know if it is operationg on the last line of a file, so we'd need to save each line and then check for FNR==1 (or the END condition). Try yourself and come back if you hit a brick wall.
 
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LEARN ABOUT OSF1

type

type(1) 						      General Commands Manual							   type(1)

NAME

       type - Writes a description of command type

SYNOPSIS

       type name...

STANDARDS

       Interfaces documented on this reference page conform to industry standards as follows:

       type:  XCU5.0

       Refer to the standards(5) reference page for more information about industry standards and associated tags.

OPTIONS

       None

OPERANDS

       A name to be interpreted

DESCRIPTION

       The type utility indicates how each argument would be interpreted if used as a command name.

       The standard output of type contains information about each parameter. The information provided identifies the operand as a shell built-in,
       a function, an alias or keyword, and where applicable, displays the command's pathname.

RESTRICTIONS

       For proper execution, type must be aware of the contents of the current shell execution environment (such as the lists of  commands,  func-
       tions  and  built-ins  processed  by hash).  If type is called in a separate utility execution environment, such as one of the following it
       might not produce accurate results.

       nohup type writer find . -type f | xargs type

EXIT STATUS

       The following exit values are returned: Successful completion.  An error occurred.

ENVIRONMENT VARIABLES

       The following environment variables affect the execution of type: Provides a default value for the internationalization variables that  are
       unset or null. If LANG is unset or null, the corresponding value from the default locale is used.  If any of the internationalization vari-
       ables contains an invalid setting, the utility behaves as if none of the variables had been defined.  If set to a non-empty  string  value,
       overrides  the  values of all the other internationalization variables.	Determines the locale for the interpretation of sequences of bytes
       of text data as characters (for example, single-byte as opposed to multibyte characters in arguments).  Determines the locale  that  should
       be  used to affect the format and contents of diagnostic messages written to standard error.  Determines the location of message catalogues
       for the processing of LC_MESSAGES.  Determines the location of name.

SEE ALSO

       Commands:  command(1), hash(1)

       Standards:  standards(5)

																	   type(1)