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static int zbx_getopt_internal (int argc, char **argv, const char *optstring, const struct zbx_option *longopts,/*NOTE: this file was modified by ZabbixGetopt for GNU.NOTE: getopt is now part of the C library, so if you don't know what"Keep this file name-space clean" means, talk to roland@gnu.ai.mit.edubefore changing it!Copyright (C) 1987, 88, 89, 90, 91, 92, 1993Free Software Foundation, Inc.This program is free software; you can redistribute it and/or modify itunder the terms of the GNU General Public License as published by theFree Software Foundation; either version 2, or (at your option) anylater version.This program is distributed in the hope that it will be useful,but WITHOUT ANY WARRANTY; without even the implied warranty ofMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See theGNU General Public License for more details.You should have received a copy of the GNU General Public Licensealong with this program; if not, write to the Free SoftwareFoundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.*//*If GETOPT_COMPAT is defined, `+' as well as `--' can introduce along-named option. Because this is not POSIX.2 compliant, it isbeing phased out.*//* #define GETOPT_COMPAT *//*This version of `getopt' appears to the caller like standard Unix `getopt'but it behaves differently for the user, since it allows the userto intersperse the options with the other arguments.As `getopt' works, it permutes the elements of ARGV so that,when it is done, all the options precede everything else. Thusall application programs are extended to handle flexible argument order.Setting the environment variable POSIXLY_CORRECT disables permutation.Then the behavior is completely standard.GNU application programs can use a third alternative mode in whichthey can distinguish the relative order of options and other arguments.*//*Index in ARGV of the next element to be scanned.This is used for communication to and from the callerand for communication between successive calls to `getopt'.On entry to `getopt', zero means this is the first call; initialize.When `getopt' returns EOF, this is the index of the first of the