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xml_diff.c
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/*
* Copyright (C) 2004 Andrew Beekhof <andrew@beekhof.net>
*
* 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 of the License, or (at your option) any later version.
*
* This software 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 library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <crm_internal.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/param.h>
#include <sys/types.h>
#include <crm/crm.h>
#include <crm/msg_xml.h>
#include <crm/common/xml.h>
#include <crm/common/ipc.h>
#include <crm/cib.h>
/* *INDENT-OFF* */
static struct crm_option long_options[] = {
/* Top-level Options */
{"help", 0, 0, '?', "\t\tThis text"},
{"version", 0, 0, '$', "\t\tVersion information" },
{"verbose", 0, 0, 'V', "\t\tIncrease debug output\n"},
{"-spacer-", 1, 0, '-', "\nOriginal XML:"},
{"original", 1, 0, 'o', "\tXML is contained in the named file"},
{"original-string", 1, 0, 'O', "XML is contained in the supplied string"},
{"-spacer-", 1, 0, '-', "\nOperation:"},
{"new", 1, 0, 'n', "\tCompare the original XML to the contents of the named file"},
{"new-string", 1, 0, 'N', "\tCompare the original XML to the contents of the supplied string"},
{"patch", 1, 0, 'p', "\tPatch the original XML with the contents of the named file"},
{"-spacer-", 1, 0, '-', "\nAdditional Options:"},
{"cib", 0, 0, 'c', "\t\tCompare/patch the inputs as a CIB (includes versions details)"},
{"filter", 0, 0, 'f', "\t\tSuppress irrelevant differences between the two inputs"},
{"stdin", 0, 0, 's', NULL, 1},
{"-spacer-", 1, 0, '-', "\nExamples:", pcmk_option_paragraph},
{"-spacer-", 1, 0, '-', "Obtain the two different configuration files by running cibadmin on the two cluster setups to compare:", pcmk_option_paragraph},
{"-spacer-", 1, 0, '-', " cibadmin --query > cib-old.xml", pcmk_option_example},
{"-spacer-", 1, 0, '-', " cibadmin --query > cib-new.xml", pcmk_option_example},
{"-spacer-", 1, 0, '-', "Calculate and save the difference between the two files:", pcmk_option_paragraph},
{"-spacer-", 1, 0, '-', " crm_diff --original cib-old.xml --new cib-new.xml > patch.xml", pcmk_option_example },
{"-spacer-", 1, 0, '-', "Apply the patch to the original file:", pcmk_option_paragraph },
{"-spacer-", 1, 0, '-', " crm_diff --original cib-old.xml --patch patch.xml > updated.xml", pcmk_option_example },
{"-spacer-", 1, 0, '-', "Apply the patch to the running cluster:", pcmk_option_paragraph },
{"-spacer-", 1, 0, '-', " cibadmin --patch patch.xml", pcmk_option_example },
{0, 0, 0, 0}
};
/* *INDENT-ON* */
int
main(int argc, char **argv)
{
gboolean apply = FALSE;
gboolean raw_1 = FALSE;
gboolean raw_2 = FALSE;
gboolean filter = FALSE;
gboolean use_stdin = FALSE;
gboolean as_cib = FALSE;
int argerr = 0;
int flag;
xmlNode *object_1 = NULL;
xmlNode *object_2 = NULL;
xmlNode *output = NULL;
const char *xml_file_1 = NULL;
const char *xml_file_2 = NULL;
int option_index = 0;
crm_log_cli_init("crm_diff");
crm_set_options(NULL, "original_xml operation [options]", long_options,
"A utility for comparing Pacemaker configurations (XML format)\n\n"
"The tool produces a custom (diff-like) output which it can also apply like a patch\n");
if (argc < 2) {
crm_help('?', EX_USAGE);
}
while (1) {
flag = crm_get_option(argc, argv, &option_index);
if (flag == -1)
break;
switch (flag) {
case 'o':
xml_file_1 = optarg;
break;
case 'O':
xml_file_1 = optarg;
raw_1 = TRUE;
break;
case 'n':
xml_file_2 = optarg;
break;
case 'N':
xml_file_2 = optarg;
raw_2 = TRUE;
break;
case 'p':
xml_file_2 = optarg;
apply = TRUE;
break;
case 'f':
filter = TRUE;
break;
case 's':
use_stdin = TRUE;
break;
case 'c':
as_cib = TRUE;
break;
case 'V':
crm_bump_log_level();
break;
case '?':
case '$':
crm_help(flag, EX_OK);
break;
default:
printf("Argument code 0%o (%c)" " is not (?yet?) supported\n", flag, flag);
++argerr;
break;
}
}
if (optind < argc) {
printf("non-option ARGV-elements: ");
while (optind < argc)
printf("%s ", argv[optind++]);
printf("\n");
}
if (optind > argc) {
++argerr;
}
if (argerr) {
crm_help('?', EX_USAGE);
}
if (raw_1) {
object_1 = string2xml(xml_file_1);
} else if (use_stdin) {
fprintf(stderr, "Input first XML fragment:");
object_1 = stdin2xml();
} else if (xml_file_1 != NULL) {
object_1 = filename2xml(xml_file_1);
}
if (raw_2) {
object_2 = string2xml(xml_file_2);
} else if (use_stdin) {
fprintf(stderr, "Input second XML fragment:");
object_2 = stdin2xml();
} else if (xml_file_2 != NULL) {
object_2 = filename2xml(xml_file_2);
}
if (object_1 == NULL) {
fprintf(stderr, "Could not parse the first XML fragment");
return 1;
}
if (object_2 == NULL) {
fprintf(stderr, "Could not parse the second XML fragment");
return 1;
}
if (apply) {
if (as_cib == FALSE) {
apply_xml_diff(object_1, object_2, &output);
} else {
apply_cib_diff(object_1, object_2, &output);
}
} else {
if (as_cib == FALSE) {
output = diff_xml_object(object_1, object_2, filter);
} else {
output = diff_cib_object(object_1, object_2, filter);
}
}
if (output != NULL) {
char *buffer = dump_xml_formatted(output);
fprintf(stdout, "%s\n", crm_str(buffer));
free(buffer);
fflush(stdout);
if (apply) {
const char *version = crm_element_value(output, XML_ATTR_CRM_VERSION);
buffer = calculate_xml_versioned_digest(output, FALSE, TRUE, version);
crm_trace("Digest: %s\n", crm_str(buffer));
free(buffer);
}
}
free_xml(object_1);
free_xml(object_2);
free_xml(output);
if (apply == FALSE && output != NULL) {
return 1;
}
return 0;
}

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