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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 OPENDARWIN

tmpfile

TMPFILE(3)						     Linux Programmer's Manual							TMPFILE(3)

NAME

       tmpfile - create a temporary file

SYNOPSIS

       #include <stdio.h>

       FILE *tmpfile(void);

DESCRIPTION

       The  tmpfile()  function  opens a unique temporary file in binary read/write (w+b) mode.  The file will be automatically deleted when it is
       closed or the program terminates.

RETURN VALUE

       The tmpfile() function returns a stream descriptor, or NULL if a unique filename cannot be generated or the unique file cannot  be  opened.
       In the latter case, errno is set to indicate the error.

ERRORS

       EACCES Search permission denied for directory in file's path prefix.

       EEXIST Unable to generate a unique filename.

       EINTR  The call was interrupted by a signal; see signal(7).

       EMFILE The per-process limit on the number of open file descriptors has been reached.

       ENFILE The system-wide limit on the total number of open files has been reached.

       ENOSPC There was no room in the directory to add the new filename.

       EROFS  Read-only filesystem.

ATTRIBUTES

       For an explanation of the terms used in this section, see attributes(7).

       +----------+---------------+---------+
       |Interface | Attribute	  | Value   |
       +----------+---------------+---------+
       |tmpfile() | Thread safety | MT-Safe |
       +----------+---------------+---------+
CONFORMING TO

       POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD, SUSv2.

NOTES

       POSIX.1-2001 specifies: an error message may be written to stdout if the stream cannot be opened.

       The  standard does not specify the directory that tmpfile() will use.  Glibc will try the path prefix P_tmpdir defined in <stdio.h>, and if
       that fails the directory /tmp.

SEE ALSO

       exit(3), mkstemp(3), mktemp(3), tempnam(3), tmpnam(3)

COLOPHON

       This page is part of release 4.15 of the Linux man-pages project.  A description of the project, information about reporting bugs, and  the
       latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.

								    2016-03-15								TMPFILE(3)
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