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/* A simple regular expression checker for rsyslog test and debug.
* Regular expressions have shown to turn out to be a hot support topic.
* While I have done an online tool at http://www.rsyslog.com/tool-regex
* there are still some situations where one wants to check against the
* actual clib api calls. This is what this small test program does,
* it takes its command line arguments (re first, then sample data) and
* pushes them into the API and then shows the result. This should be
* considered the ultimate reference for any questions arising.
*
* Copyright 2008 Rainer Gerhards and Adiscon GmbH.
*
* This file is part of rsyslog.
*
* Rsyslog 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 3 of the License, or
* (at your option) any later version.
*
* Rsyslog 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 Rsyslog. If not, see <http://www.gnu.org/licenses/>.
*
* A copy of the GPL can be found in the file "COPYING" in this distribution.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <regex.h>
int main(int argc, char *argv[])
{
regex_t preg;
size_t nmatch = 10;
regmatch_t pmatch[10];
char *pstr;
int i;
if(argc != 3) {
fprintf(stderr, "usage: regex regexp sample-data\n");
exit(1);
}
pstr = strdup(argv[2]); /* get working copy */
i = regcomp(&preg, argv[1], REG_EXTENDED);
printf("regcomp returns %d\n", i);
i = regexec(&preg, pstr, nmatch, pmatch, 0);
printf("regexec returns %d\n", i);
if(i == REG_NOMATCH) {
printf("found no match!\n");
return 1;
}
printf("returned substrings:\n");
for(i = 0 ; i < 10 ; i++) {
printf("%d: so %d, eo %d", i, pmatch[i].rm_so, pmatch[i].rm_eo);
if(pmatch[i].rm_so != -1) {
int j;
printf(", text: '");
for(j = pmatch[i].rm_so ; j < pmatch[i].rm_eo ; ++j)
putchar(pstr[j]);
putchar('\'');
}
putchar('\n');
}
return 0;
}
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