web/libapache2-mod-qos
1
0
Fork 0
Code Issues Activity
libapache2-mod-qos/tools/src/qsgrep.c
Daniel Baumann 1a9d02dfcf
Adding upstream version 11.76. 
Signed-off-by: Daniel Baumann <daniel@debian.org>
2025-03-24 13:01:55 +01:00

301 lines
8.1 KiB
C
Raw Blame History

/* -*-mode: c; indent-tabs-mode: nil; c-basic-offset: 2; -*-
*/
/**
* Filter utility for the quality of service module mod_qos.
*
* qsgrep.c: simple tool to search patterns within files
*
* See http://mod-qos.sourceforge.net/ for further details.
*
* Copyright (C) 2025 Pascal Buchbinder
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
static const char revision[] = "$Id: qsgrep.c 2654 2022-05-13 09:12:42Z pbuchbinder $";
/* system */
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <time.h>
/* apr */
#include <apr.h>
#include <apr_strings.h>
#include <apr_file_io.h>
#include <apr_time.h>
#include <apr_getopt.h>
#include <apr_general.h>
#include <apr_lib.h>
#include <apr_portable.h>
#include <apr_support.h>
#define PCRE2_CODE_UNIT_WIDTH 8
#include <pcre2.h>
#include "qs_util.h"
#ifndef POSIX_MALLOC_THRESHOLD
#define POSIX_MALLOC_THRESHOLD (10)
#endif
/* same as APR_SIZE_MAX which doesn't appear until APR 1.3 */
#define QSUTIL_SIZE_MAX (~((apr_size_t)0))
typedef struct {
int rm_so;
int rm_eo;
} regmatch_t;
static void usage(char *cmd, int man) {
if(man) {
//.TH [name of program] [section number] [center footer] [left footer] [center header]
printf(".TH %s 1 \"%s\" \"mod_qos utilities %s\" \"%s man page\"\n", qs_CMD(cmd), man_date,
man_version, cmd);
}
printf("\n");
if(man) {
printf(".SH NAME\n");
}
qs_man_print(man, "%s - prints matching patterns within a file.\n", cmd);
printf("\n");
if(man) {
printf(".SH SYNOPSIS\n");
}
qs_man_print(man, "%s%s -e <pattern> -o <sub string> [<path>]\n", man ? "" : "Usage: ", cmd);
printf("\n");
if(man) {
printf(".SH DESCRIPTION\n");
} else {
printf("Summary\n");
}
qs_man_print(man, "%s is a simple tool to search patterns within files.\n", cmd);
qs_man_print(man, "It uses regular expressions to find patterns and prints the\n");
qs_man_print(man, "submatches within a pre-defined format string.\n");
printf("\n");
if(man) {
printf(".SH OPTIONS\n");
} else {
printf("Options\n");
}
if(man) printf(".TP\n");
qs_man_print(man, " -e <pattern>\n");
if(man) printf("\n");
qs_man_print(man, " Specifies the search pattern.\n");
if(man) printf("\n.TP\n");
qs_man_print(man, " -o <string>\n");
if(man) printf("\n");
qs_man_print(man, " Defines the output string where $0-$9 are substituted by the\n");
qs_man_print(man, " submatches of the regular expression.\n");
if(man) printf("\n.TP\n");
qs_man_print(man, " <path>\n");
if(man) printf("\n");
qs_man_print(man, " Defines the input file to process. %s reads from\n", cmd);
qs_man_print(man, " from standard input if this parameter is omitted.\n");
printf("\n");
printf("\n");
if(man) {
printf(".SH EXAMPLE\n");
qs_man_println(man, "Shows the IP addresses of clients causing mod_qos(031) messages):\n");
printf("\n");
} else {
printf("Example (shows the IP addresses of clients causing mod_qos(031) messages):\n");
}
qs_man_println(man, " %s -e 'mod_qos\\(031\\).*, c=([a-zA-Z0-9:.]*)' -o 'ip=$1' error_log\n", cmd);
printf("\n");
if(man) {
printf(".SH SEE ALSO\n");
printf("qsdt(1), qsexec(1), qsfilter2(1), qsgeo(1), qshead(1), qslog(1), qslogger(1), qspng(1), qsre(1), qsrespeed(1), qsrotate(1), qssign(1), qstail(1)\n");
printf(".SH AUTHOR\n");
printf("Pascal Buchbinder, http://mod-qos.sourceforge.net/\n");
} else {
printf("See http://mod-qos.sourceforge.net/ for further details.\n");
}
if(man) {
exit(0);
} else {
exit(1);
}
}
/*
* Substitutes for $0-$9 within the matching string.
* See ap_pregsub().
*/
char *qs_pregsub(apr_pool_t *pool, const char *input,
const char *source, size_t nmatch,
qs_regmatch_t pmatch[]) {
const char *src = input;
char *dest, *dst;
char c;
size_t no;
int len;
if(!source) {
return NULL;
}
if(!nmatch) {
return apr_pstrdup(pool, src);
}
/* First pass, find the size */
len = 0;
while((c = *src++) != '\0') {
if(c == '&')
no = 0;
else if (c == '$' && apr_isdigit(*src))
no = *src++ - '0';
else
no = 10;
if (no > 9) { /* Ordinary character. */
if (c == '\\' && (*src == '$' || *src == '&'))
src++;
len++;
}
else if (no < nmatch && pmatch[no].rm_so < pmatch[no].rm_eo) {
if(QSUTIL_SIZE_MAX - len <= pmatch[no].rm_eo - pmatch[no].rm_so) {
fprintf(stderr, "ERROR, integer overflow or out of memory condition");
return NULL;
}
len += pmatch[no].rm_eo - pmatch[no].rm_so;
}
}
dest = dst = apr_pcalloc(pool, len + 1);
/* Now actually fill in the string */
src = input;
while ((c = *src++) != '\0') {
if (c == '&')
no = 0;
else if (c == '$' && apr_isdigit(*src))
no = *src++ - '0';
else
no = 10;
if (no > 9) { /* Ordinary character. */
if (c == '\\' && (*src == '$' || *src == '&'))
c = *src++;
*dst++ = c;
}
else if (no < nmatch && pmatch[no].rm_so < pmatch[no].rm_eo) {
len = pmatch[no].rm_eo - pmatch[no].rm_so;
memcpy(dst, source + pmatch[no].rm_so, len);
dst += len;
}
}
*dst = '\0';
return dest;
}
int main(int argc, const char * const argv[]) {
unsigned long nr = 0;
char line[32768];
FILE *file = 0;
apr_pool_t *pool;
char *cmd = strrchr(argv[0], '/');
const char *out = NULL;
const char *pattern = NULL;
const char *filename = NULL;
qs_regex_t *preg;
qs_regmatch_t regm[QS_MAX_REG_MATCH];
apr_app_initialize(&argc, &argv, NULL);
apr_pool_create(&pool, NULL);
if(cmd == NULL) {
cmd = (char *)argv[0];
} else {
cmd++;
}
argc--;
argv++;
while(argc >= 1) {
if(strcmp(*argv,"-e") == 0) {
if (--argc >= 1) {
pattern = *(++argv);
}
} else if(strcmp(*argv,"-o") == 0) {
if (--argc >= 1) {
out = *(++argv);
}
} else if(strcmp(*argv,"-h") == 0) {
usage(cmd, 0);
} else if(strcmp(*argv,"-?") == 0) {
usage(cmd, 0);
} else if(strcmp(*argv,"-help") == 0) {
usage(cmd, 0);
} else if(strcmp(*argv,"--man") == 0) {
usage(cmd, 1);
} else {
filename = *argv;
}
argc--;
argv++;
}
if(pattern == NULL || out == NULL) {
usage(cmd, 0);
}
if(nice(10) == -1) {
fprintf(stderr, "ERROR, failed to change nice value: %s\n", strerror(errno));
}
preg = apr_palloc(pool, sizeof(qs_regex_t));
if(qs_regcomp(preg, pattern, PCRE2_DOTALL) != 0) {
fprintf(stderr, "ERROR, could not compile '%s\n", pattern);
exit(1);
}
apr_pool_pre_cleanup_register(pool, preg, qs_pregfree);
if(filename) {
file = fopen(filename, "r");
if(!file) {
fprintf(stderr, "ERROR, could not open file\n");
exit(1);
}
} else {
file = stdin;
}
while(fgets(line, sizeof(line), file) != NULL) {
size_t len = strlen(line);
nr++;
if(qs_regexec_len(preg, line, len, QS_MAX_REG_MATCH, regm, 0) >= 0) {
apr_pool_t *subpool;
char *replaced;
apr_pool_create(&subpool, pool);
replaced = qs_pregsub(subpool, out, line, QS_MAX_REG_MATCH, regm);
if(!replaced) {
fprintf(stderr, "ERROR, failed to substitute submatches (line=%lu)\n", nr);
} else {
printf("%s\n", replaced);
fflush(stdout);
}
apr_pool_destroy(subpool);
}
}
if(filename) {
fclose(file);
}
apr_pool_destroy(pool);
return 0;
}
View git blame Copy permalink