1 files changed, 72 insertions, 0 deletions
diff --git a/tools/regexp.c b/tools/regexp.c
new file mode 100644
index 00000000..c8e4c681
--- /dev/null
+++ b/tools/regexp.c
@@ -0,0 +1,72 @@
+/* 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;
+}