disable_rgmanager.c

/*
  Copyright Red Hat, Inc. 2004-2006

  This program is free software; you can redistribute it and/or modify it
  under the terms of the GNU General Public License as published by the
  Free Software Foundation; either version 2, or (at your option) any
  later version.

  This program is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program; see the file COPYING.  If not, write to the
  Free Software Foundation, Inc.,  675 Mass Ave, Cambridge, 
  MA 02139, USA.
*/
#include <libxml/parser.h>
#include <libxml/xmlmemory.h>
#include <libxml/xpath.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <libgen.h>

#define shift() {++argv; --argc;}

int
disable_rgmanager(xmlDocPtr doc)
{
	char buf[32];
	xmlNodePtr n, o;
	char *a;
	int x;

	if (!doc)
		return 0;
	n = xmlDocGetRootElement(doc);
	if (!n)
		return 0;
	if (strcmp((char *)n->name, "cluster")) {
		fprintf(stderr,"Expected cluster tag, got %s\n",
			(char *)n->name);
		return 0;
	}

	a = (char *)xmlGetProp(n, (xmlChar *)"config_version");
	if (!a) {
		fprintf(stderr,"No config_version found on cluster tag\n");
		return 0;
	}

	x = atoi(a);
	if (x == 0) {
		fprintf(stderr,"config_version was invalid\n");
		return 0;
	}

	++x;
	snprintf(buf, sizeof(buf), "%d", x);
	if (xmlSetProp(n, (xmlChar *)"config_version", (xmlChar *)buf) == NULL) {
		fprintf(stderr,"Failed to update config_version\n");
		return 0;
	}

	for (o = n->xmlChildrenNode; o; o = o->next) {
		if (o->type != XML_ELEMENT_NODE)
			continue;
		if (!strcmp((char *)o->name, "rm"))
			break;
	}

	if (!o)
		return 0;

	if (xmlSetProp(o, (xmlChar *)"disabled", (xmlChar *)"1") == NULL) {
		fprintf(stderr,"Failed to disable rgmanager\n");
		return 0;
	}

	return 1;
}


void
usage(const char *arg0, int ret)
{
	fprintf(stderr,"usage: %s <input.conf> [output.conf]\n", arg0);
	exit(ret);
}


int
main(int argc, char **argv)
{
	char *arg0 = basename(argv[0]);
	int ret = 0;
	xmlDocPtr doc = NULL;

	if (argc < 2) {
		usage(arg0, 1);
	}

	if (!strcasecmp(argv[1], "-h") ||
	    !strcasecmp(argv[1], "-?")) {
		usage(arg0, 0);
	}

	xmlInitParser();
	xmlIndentTreeOutput = 1;
	xmlKeepBlanksDefault(0);

	shift();
	doc = xmlParseFile(argv[0]);

	if (disable_rgmanager(doc)) {
		xmlDocFormatDump(stdout, doc, 1);
	}

	if (doc) 
		xmlFreeDoc(doc);
	xmlCleanupParser();
	return ret;
}