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Full Discussion: sorting csv file based on column selected
Top Forums Shell Programming and Scripting sorting csv file based on column selected Post 302331153 by kshji on Saturday 4th of July 2009 02:11:30 AM
Old 07-04-2009
Using awk rule idea.
Code:
ff=file.txt

sort -t";" -k3 -k2 $ff | \
   awk -F";" -v keyfld=3 '
      # - next key value
      $keyfld != prevkey { 
                print toupper($keyfld) 
                }
      # - every line
                { 
                print $0
                prevkey=$keyfld
                }
   '

Or using ksh
Code:
prevkey=""
oifs="$IFS"
typeset -u key
sort -t";" -k3 -k2 $ff | while read line
do
        IFS=";"
        set -A flds -- $line    # to array, 1st index 0 
        IFS="$oifs"
        key=${flds[2]}
        [ "$prevkey" != "$key" ] && print "$key"
        print "$line"
        prevkey=$key
done

 

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LEARN ABOUT CENTOS

evp_pkey_print_private

EVP_PKEY_print_private(3)					      OpenSSL						 EVP_PKEY_print_private(3)

NAME

       EVP_PKEY_print_public, EVP_PKEY_print_private, EVP_PKEY_print_params - public key algorithm printing routines.

SYNOPSIS

	#include <openssl/evp.h>

	int EVP_PKEY_print_public(BIO *out, const EVP_PKEY *pkey,
				       int indent, ASN1_PCTX *pctx);
	int EVP_PKEY_print_private(BIO *out, const EVP_PKEY *pkey,
				       int indent, ASN1_PCTX *pctx);
	int EVP_PKEY_print_params(BIO *out, const EVP_PKEY *pkey,
				       int indent, ASN1_PCTX *pctx);

DESCRIPTION

       The functions EVP_PKEY_print_public(), EVP_PKEY_print_private() and EVP_PKEY_print_params() print out the public, private or parameter
       components of key pkey respectively. The key is sent to BIO out in human readable form. The parameter indent indicated how far the printout
       should be indented.

       The pctx parameter allows the print output to be finely tuned by using ASN1 printing options. If pctx is set to NULL then default values
       will be used.

NOTES

       Currently no public key algorithms include any options in the pctx parameter parameter.

       If the key does not include all the components indicated by the function then only those contained in the key will be printed. For example
       passing a public key to EVP_PKEY_print_private() will only print the public components.

RETURN VALUES

       These functions all return 1 for success and 0 or a negative value for failure.	In particular a return value of -2 indicates the operation
       is not supported by the public key algorithm.

SEE ALSO

       EVP_PKEY_CTX_new(3), EVP_PKEY_keygen(3)

HISTORY

       These functions were first added to OpenSSL 1.0.0.

1.0.1e								    2013-02-11						 EVP_PKEY_print_private(3)
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