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/*
* gxpd.c -- Simple XPath Delete Util
*
* Copyright © 2006-2008 Red Hat, Inc. All rights reserved.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions of the
* GNU General Public License v.2. This program is distributed in the hope
* that it will be useful, but WITHOUT ANY WARRANTY expressed or implied,
* including the implied warranties 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; if not, write to the Free Software Foundation, Inc., 51
* Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. Any Red Hat
* trademarks that are incorporated in the source code or documentation are not
* subject to the GNU General Public License and may only be used or replicated
* with the express permission of Red Hat, Inc.
*
* Red Hat Author(s): Nathan Straz <nstraz@redhat.com>
*/
#include <stdio.h>
#include <stdlib.h>
#include <getopt.h>
#include <string.h>
#include <ctype.h>
#include <libxml/parser.h>
#include <libxml/tree.h>
#include <libxml/xpath.h>
#include <libxml/xpathInternals.h>
#include <libxml/xinclude.h>
#include "gxp-int.h"
static void usage(const char *pname);
static int gxpd(char *fn, const char *xpath_query, const char *prefix);
int
main(int argc, char **argv)
{
char *xpath_query = NULL;
char *prefix = NULL;
int c;
while ((c = getopt(argc, argv, "+p:h")) != -1) {
switch (c) {
case 'p':
prefix = strdup(optarg);
break;
case 'h':
case '?':
usage(argv[0]);
exit(2);
break;
}
}
xpath_query = argv[optind];
if (!xpath_query) {
fprintf(stderr, "Missing XPath Query\n");
usage(argv[0]);
exit(2);
}
optind++;
if (!argv[optind]) {
/* No files given, filter stdin to stdout */
gxpd("-", xpath_query, prefix);
} else {
/* Rest of the args are the files to change */
#if 0
if (((argc - optind) > 1)
&& (!gxpp_opts.omitfileprefix)) gxpp_opts.addfileprefix = 1;
#endif
for (c = optind; c < argc; c++) {
/* Make sure we can write to the file */
gxpd(argv[c], xpath_query, prefix);
}
}
return 0;
}
static int
gxpd(char *fn, const char *xpath_query, const char *prefix)
{
xmlDocPtr doc;
xmlXPathContextPtr ctx;
xmlXPathObjectPtr obj;
int i;
if (!(doc = xmlParseFile(fn))) {
fprintf(stderr, "Failed to parse XML file\n");
exit(1);
}
/* xmlXIncludeProcess(doc); */
ctx = generate_context(doc, prefix);
obj = xmlXPathEvalExpression((xmlChar *)xpath_query, ctx);
if (!obj) {
fprintf(stderr, "XPath expression '%s' did not match in '%s'\n",
xpath_query, fn);
exit(1);
}
/* return early if there were no nodes to remove */
if (obj->type != XPATH_NODESET) return 1;
if (obj->nodesetval == NULL) return 1;
for (i = 0; i < obj->nodesetval->nodeNr; i++) {
xmlUnlinkNode(obj->nodesetval->nodeTab[i]);
xmlFreeNode(obj->nodesetval->nodeTab[i]);
}
printf("%d nodes removed from %s\n", i, fn);
xmlXPathFreeObject(obj);
xmlSaveFile(fn, doc);
xmlXPathFreeContext(ctx);
xmlFreeDoc(doc);
return 0;
}
static void
usage(const char *pname)
{
fprintf(stderr,"%s [OPTION]... XPATH [FILE]...\n", pname);
fprintf(stderr,"Options:\n"
"-p prefix Set prefix for default namespace\n");
return;
}
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