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/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2010 Red Hat, Inc. All rights reserved.
*
* This file is part of LVM2.
*
* 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.
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "libdevmapper.h"
#include "log.h"
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/mman.h>
static int _read_spec(const char *file, char ***regex, int *nregex)
{
char buffer[1024], *start, *ptr;
FILE *fp = fopen(file, "r");
int asize = 100;
char **rx = dm_malloc(sizeof(*rx) * asize);
int nr = 0;
if (!fp)
return 0;
while (fgets(buffer, sizeof(buffer),fp)) {
/* trim leading whitespace */
for (ptr = buffer; *ptr && isspace((int) *ptr); ptr++);
if (!*ptr || *ptr == '#')
continue;
if (*ptr == '\"') {
ptr++;
start = ptr;
while (*ptr && *ptr != '\"') {
if (*ptr == '\\')
ptr++;
ptr++;
}
if (!*ptr) {
fprintf(stderr, "Formatting error : "
"No terminating quote\n");
return 0;
}
rx[nr] = dm_malloc((ptr - start) + 1);
strncpy(rx[nr], start, ptr - start);
rx[nr][ptr - start] = '\0';
nr++;
} else {
fprintf(stderr, "%s", ptr);
fprintf(stderr, "Formatting error : \"<regex>\" "
"<token_name>\n");
return 0;
}
}
*regex = rx;
*nregex = nr;
return 1;
}
static void _free_regex(char **regex, int nregex)
{
int i;
for (i = 0; i < nregex; i++)
dm_free(regex[i]);
dm_free(regex);
}
static void _scan_input(struct dm_regex *m, char **regex)
{
char buffer[256], *ptr;
int r;
while (fgets(buffer, sizeof(buffer), stdin)) {
if ((ptr = strchr(buffer, '\n')))
*ptr = '\0';
r = dm_regex_match(m, buffer);
if (r >= 0)
printf("%s : %s\n", buffer, regex[r]);
}
}
int main(int argc, char **argv)
{
struct dm_pool *mem;
struct dm_regex *scanner;
char **regex;
int nregex;
int ret = 0;
int want_finger_print = 0, i;
const char *pattern_file = NULL;
for (i = 1; i < argc; i++)
if (!strcmp(argv[i], "--fingerprint"))
want_finger_print = 1;
else
pattern_file = argv[i];
if (!pattern_file) {
fprintf(stderr, "Usage : %s [--fingerprint] <pattern_file>\n", argv[0]);
exit(1);
}
dm_log_init_verbose(_LOG_DEBUG);
if (!(mem = dm_pool_create("match_regex", 10 * 1024))) {
fprintf(stderr, "Couldn't create pool\n");
ret = 2;
goto err;
}
if (!_read_spec(pattern_file, ®ex, &nregex)) {
fprintf(stderr, "Couldn't read the lex specification\n");
ret = 3;
goto err;
}
if (!(scanner = dm_regex_create(mem, (const char **)regex, nregex))) {
fprintf(stderr, "Couldn't build the lexer\n");
ret = 4;
goto err;
}
if (want_finger_print)
printf("fingerprint: %x\n", dm_regex_fingerprint(scanner));
_scan_input(scanner, regex);
_free_regex(regex, nregex);
err:
dm_pool_destroy(mem);
return ret;
}
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