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Full Discussion: Help with sort in Linux
Top Forums Shell Programming and Scripting Help with sort in Linux Post 302972294 by Don Cragun on Tuesday 3rd of May 2016 10:42:35 PM
Old 05-03-2016
Assuming that there can be multiple subcircuit pin orders in a single file (with blank lines between them being ignored) and that the .SUBCKT string doesn't need to be treated specially, you could start with something like:
Code:
#!/bin/ksh
IAm=${0##*/}
tmpfile="$IAm.$$"
trap 'rm -f "$tmpfile"' EXIT

awk -v tmpfile="$tmpfile" '
BEGIN {	cmd = "sort > " tmpfile
}
function print_list(	data, i, j) {
	close(cmd)
	for(i = first; i <= last; i++) {
		if(i != first)
			printf(" +")
		for(j = 1 + (i != first); j <= count[i]; j++) {
			getline data < tmpfile
			printf(" %s%s", data, (j == count[i]) ? "\n" : "")
		}
	}
	close(tmpfile)
}
NF == 0 {
	next
}
$1 != "+" {
	if(NR > 1)
		print_list(first, last)
	count[first = last = NR] = NF
	for(i = 1; i <= NF; i++)
		print $i | cmd
	next
}
{	count[last = NR] = NF
	for(i = 2; i <= NF; i++)
		print $i | cmd
}
END {	print_list()
}' file

which, if file contains:
Code:
w m a c G
 + V b y
 + d f e t

 .SUBCKT analog_top cfg_wait[2] cfgwait[1] iso_0p9
 + d_idac_div[1] d_mux_div  rx_reserved[3]
 + VDD1 GND2

(as in your two examples) produces the output:
Code:
 G V a b c
 + d e f
 + m t w y
 .SUBCKT GND2 VDD1 analog_top cfg_wait[2]
 + cfgwait[1] d_idac_div[1] d_mux_div
 + iso_0p9 rx_reserved[3]

This was written and tested using the Korn shell, but should work with any shell that recognizes basic POSIX-required shell syntax (such as ash, bash, dash, ksh, zsh , and several others) but not a pure Bourne shell and not a shell based on csh syntax.

Obviously, error checking should be added to the above if you're going to use this in a production environment, but I'll leave that as an exercise for the reader.

If someone else want to try this on a Solaris/SunOS system, change awk in the script to /usr/xpg4/bin/awk or nawk.
 

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LEARN ABOUT V7

join

JOIN(1) 						      General Commands Manual							   JOIN(1)

NAME

       join - relational database operator

SYNOPSIS

       join [ options ] file1 file2

DESCRIPTION

       Join  forms,  on the standard output, a join of the two relations specified by the lines of file1 and file2.  If file1 is `-', the standard
       input is used.

       File1 and file2 must be sorted in increasing ASCII collating sequence on the fields on which they are to be joined, normally the  first	in
       each line.

       There  is  one line in the output for each pair of lines in file1 and file2 that have identical join fields.  The output line normally con-
       sists of the common field, then the rest of the line from file1, then the rest of the line from file2.

       Fields are normally separated by blank, tab or newline.	In this case, multiple separators count as one, and leading  separators  are  dis-
       carded.

       These options are recognized:

       -an    In addition to the normal output, produce a line for each unpairable line in file n, where n is 1 or 2.

       -e s   Replace empty output fields by string s.

       -jn m  Join on the mth field of file n.	If n is missing, use the mth field in each file.

       -o list
	      Each  output line comprises the fields specifed in list, each element of which has the form n.m, where n is a file number and m is a
	      field number.

       -tc    Use character c as a separator (tab character).  Every appearance of c in a line is significant.

SEE ALSO

       sort(1), comm(1), awk(1)

BUGS

       With default field separation, the collating sequence is that of sort -b; with -t, the sequence is that of a plain sort.

       The conventions of join, sort, comm, uniq, look and awk(1) are wildly incongruous.

																	   JOIN(1)
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