zoneminder/src/zm_fifo_debug.cpp

100 lines
2.8 KiB
C++

//
// ZoneMinder Fifo Debug
// Copyright (C) 2019 ZoneMinder LLC
//
// This program 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 2
// of the License, or (at your option) any later version.
//
// This program 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 this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
#include "zm_fifo_debug.h"
#include "zm_fifo.h"
#include "zm_monitor.h"
#include "zm_signal.h"
#include <fcntl.h>
#include <sys/file.h>
#include <unistd.h>
#define RAW_BUFFER 512
static bool zm_fifodbg_inited = false;
FILE *zm_fifodbg_log_fd = nullptr;
char zm_fifodbg_log[PATH_MAX] = "";
static bool zmFifoDbgOpen() {
if ( zm_fifodbg_log_fd )
fclose(zm_fifodbg_log_fd);
zm_fifodbg_log_fd = nullptr;
signal(SIGPIPE, SIG_IGN);
Fifo::fifo_create_if_missing(zm_fifodbg_log);
int fd = open(zm_fifodbg_log, O_WRONLY|O_NONBLOCK|O_TRUNC);
if ( fd < 0 )
return false;
int res = flock(fd, LOCK_EX | LOCK_NB);
if ( res < 0 ) {
close(fd);
return false;
}
zm_fifodbg_log_fd = fdopen(fd, "wb");
if ( zm_fifodbg_log_fd == nullptr ) {
close(fd);
return false;
}
return true;
}
int zmFifoDbgInit(Monitor *monitor) {
zm_fifodbg_inited = true;
snprintf(zm_fifodbg_log, sizeof(zm_fifodbg_log), "%s/dbgpipe-%u.log",
staticConfig.PATH_SOCKS.c_str(), monitor->Id());
zmFifoDbgOpen();
return 1;
}
void zmFifoDbgOutput(
int hex,
const char * const file,
const int line,
const int level,
const char *fstring,
...
) {
char dbg_string[8192];
int str_size = sizeof(dbg_string);
va_list arg_ptr;
if ( (!zm_fifodbg_inited) || ( !zm_fifodbg_log_fd && !zmFifoDbgOpen() ) )
return;
char *dbg_ptr = dbg_string;
va_start(arg_ptr, fstring);
if ( hex ) {
unsigned char *data = va_arg(arg_ptr, unsigned char *);
int len = va_arg(arg_ptr, int);
dbg_ptr += snprintf(dbg_ptr, str_size-(dbg_ptr-dbg_string), "%d:", len);
for ( int i = 0; i < len; i++ ) {
dbg_ptr += snprintf(dbg_ptr, str_size-(dbg_ptr-dbg_string), " %02x", data[i]);
}
} else {
dbg_ptr += vsnprintf(dbg_ptr, str_size-(dbg_ptr-dbg_string), fstring, arg_ptr);
}
va_end(arg_ptr);
strncpy(dbg_ptr++, "\n", 2);
int res = fwrite(dbg_string, dbg_ptr-dbg_string, 1, zm_fifodbg_log_fd);
if ( res != 1 ) {
fclose(zm_fifodbg_log_fd);
zm_fifodbg_log_fd = nullptr;
} else {
fflush(zm_fifodbg_log_fd);
}
}