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openwrt-packages/net/net-snmp/patches/202-Improve-pcre2-support.p...

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From 346b6f8959513320e5b674fd670c49ba2cd43af5 Mon Sep 17 00:00:00 2001
From: Bart Van Assche <bvanassche@acm.org>
Date: Sun, 21 May 2023 16:18:56 -0700
Subject: [PATCH] Improve pcre2 support
Fix compiler warnings. Convert C++ comments to C comments. Make sure that
declarations occur before statements.
---
agent/mibgroup/host/data_access/swrun.c | 17 ++++------
agent/mibgroup/if-mib/data_access/interface.c | 32 ++++++++++---------
agent/mibgroup/ucd-snmp/proc.c | 13 +++++---
3 files changed, 31 insertions(+), 31 deletions(-)
--- a/agent/mibgroup/host/data_access/swrun.c
+++ b/agent/mibgroup/host/data_access/swrun.c
@@ -111,10 +111,7 @@ swrun_count_processes_by_regex( char *na
netsnmp_iterator *it;
int i = 0;
#ifdef HAVE_PCRE2_H
- pcre2_match_data *ndx_match;
- int *found_ndx;
- ndx_match = pcre2_match_data_create(30, NULL);
- found_ndx = pcre2_get_ovector_pointer(ndx_match);
+ pcre2_match_data *ndx_match = pcre2_match_data_create(30, NULL);
#elif defined(HAVE_PCRE_H)
int found_ndx[30];
#endif
@@ -122,22 +119,20 @@ swrun_count_processes_by_regex( char *na
char fullCommand[64 + 128 + 128 + 3];
netsnmp_cache_check_and_reload(swrun_cache);
- if ( !swrun_container || !name || !regexp.regex_ptr )
+ if ( !swrun_container || !name || !regexp.regex_ptr ) {
#ifdef HAVE_PCRE2_H
- {
pcre2_match_data_free(ndx_match);
- return 0;
- }
-#else
- return 0; /* or -1 */
#endif
+ return 0; /* or -1 */
+ }
it = CONTAINER_ITERATOR( swrun_container );
while ((entry = (netsnmp_swrun_entry*)ITERATOR_NEXT( it )) != NULL) {
/* need to assemble full command back so regexps can get full picture */
sprintf(fullCommand, "%s %s", entry->hrSWRunPath, entry->hrSWRunParameters);
#ifdef HAVE_PCRE2_H
- found = pcre2_match(regexp.regex_ptr, fullCommand, strlen(fullCommand), 0, 0, ndx_match, NULL);
+ found = pcre2_match(regexp.regex_ptr, (unsigned char *)fullCommand,
+ strlen(fullCommand), 0, 0, ndx_match, NULL);
#elif HAVE_PCRE_H
found = pcre_exec(regexp.regex_ptr, NULL, fullCommand, strlen(fullCommand), 0, 0, found_ndx, 30);
#endif
--- a/agent/mibgroup/if-mib/data_access/interface.c
+++ b/agent/mibgroup/if-mib/data_access/interface.c
@@ -828,12 +828,8 @@ int netsnmp_access_interface_max_reached
int netsnmp_access_interface_include(const char *name)
{
netsnmp_include_if_list *if_ptr;
-#if defined(HAVE_PCRE2_H)
- //pcre_exec->pcre2_match
- //ovector->pcre2_match_data
- pcre2_match_data *ndx_match;
- ndx_match = pcre2_match_data_create(3, NULL);
- int *found_ndx = pcre2_get_ovector_pointer(ndx_match);
+#if defined(HAVE_PCRE2_H)
+ pcre2_match_data *ndx_match = pcre2_match_data_create(3, NULL);
#elif defined(HAVE_PCRE_H)
int found_ndx[3];
#endif
@@ -851,8 +847,8 @@ int netsnmp_access_interface_include(con
for (if_ptr = include_list; if_ptr; if_ptr = if_ptr->next) {
#if defined(HAVE_PCRE2_H)
- if (pcre2_match(if_ptr->regex_ptr, name, strlen(name), 0, 0,
- ndx_match, NULL) >= 0) {
+ if (pcre2_match(if_ptr->regex_ptr, (const unsigned char *)name,
+ strlen(name), 0, 0, ndx_match, NULL) >= 0) {
pcre2_match_data_free(ndx_match);
return TRUE;
}
@@ -984,11 +980,13 @@ _parse_include_if_config(const char *tok
netsnmp_include_if_list *if_ptr, *if_new;
char *name, *st;
#if defined(HAVE_PCRE2_H)
- //we can only get the message upon calling pcre2_error_message.
- // so an additional variable is required.
+ /*
+ * We can only get the message upon calling pcre2_error_message.
+ * so an additional variable is required.
+ */
int pcre2_err_code;
- unsigned char pcre2_error[128];
- int pcre2_error_offset;
+ char pcre2_error[128];
+ size_t pcre2_error_offset;
#elif defined(HAVE_PCRE_H)
const char *pcre_error;
int pcre_error_offset;
@@ -1022,10 +1020,14 @@ _parse_include_if_config(const char *tok
goto err;
}
#if defined(HAVE_PCRE2_H)
- if_new->regex_ptr = pcre2_compile(if_new->name, PCRE2_ZERO_TERMINATED, 0,
- &pcre2_err_code, &pcre2_error_offset, NULL);
+ if_new->regex_ptr = pcre2_compile((const unsigned char *)if_new->name,
+ PCRE2_ZERO_TERMINATED, 0,
+ &pcre2_err_code, &pcre2_error_offset,
+ NULL);
if (!if_new->regex_ptr) {
- pcre2_get_error_message(pcre2_err_code, pcre2_error, 128);
+ pcre2_get_error_message(pcre2_err_code,
+ (unsigned char *)pcre2_error,
+ sizeof(pcre2_error));
config_perror(pcre2_error);
goto err;
}
--- a/agent/mibgroup/ucd-snmp/proc.c
+++ b/agent/mibgroup/ucd-snmp/proc.c
@@ -226,15 +226,17 @@ proc_parse_config(const char *token, cha
#if defined(HAVE_PCRE2_H) || defined(HAVE_PCRE_H)
cptr = skip_not_white(cptr);
if ((cptr = skip_white(cptr))) {
- DEBUGMSGTL(("ucd-snmp/regexp_proc", "Loading regex %s\n", cptr));
#ifdef HAVE_PCRE2_H
- unsigned char pcre2_error_msg[128];
+ char pcre2_error_msg[128];
int pcre2_err_code;
- int pcre2_error_offset;
+ size_t pcre2_error_offset;
+ DEBUGMSGTL(("ucd-snmp/regexp_proc", "Loading regex %s\n", cptr));
(*procp)->regexp.regex_ptr =
- pcre2_compile(cptr, PCRE2_ZERO_TERMINATED, 0, &pcre2_err_code, &pcre2_error_offset, NULL);
- pcre2_get_error_message(pcre2_err_code, pcre2_error_msg, 128);
+ pcre2_compile((const unsigned char *)cptr, PCRE2_ZERO_TERMINATED, 0, &pcre2_err_code, &pcre2_error_offset, NULL);
+ pcre2_get_error_message(pcre2_err_code,
+ (unsigned char *)pcre2_error_msg,
+ sizeof(pcre2_error_msg));
if ((*procp)->regexp.regex_ptr == NULL) {
config_perror(pcre2_error_msg);
}
@@ -242,6 +244,7 @@ proc_parse_config(const char *token, cha
const char *pcre_error;
int pcre_error_offset;
+ DEBUGMSGTL(("ucd-snmp/regexp_proc", "Loading regex %s\n", cptr));
(*procp)->regexp.regex_ptr =
pcre_compile(cptr, 0, &pcre_error, &pcre_error_offset, NULL);
if ((*procp)->regexp.regex_ptr == NULL) {
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