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Diffstat (limited to 'hugin_syslog.c')
| -rw-r--r-- | hugin_syslog.c | 274 |
1 files changed, 274 insertions, 0 deletions
diff --git a/hugin_syslog.c b/hugin_syslog.c new file mode 100644 index 0000000..2a8abb3 --- /dev/null +++ b/hugin_syslog.c @@ -0,0 +1,274 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set et sw=2 ts=2: */ +/*************************************************************************** + * debug_syslog.c + * + * Fri Dec 7 14:24:54 CET 2012 + * Copyright 2012 Jonas Suhr Christensen + * jsc@umbraculum.org + ****************************************************************************/ + +/* + * This file is part of Debug Module. + * + * Debug Module 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. + * + * Debug Module 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 Debug Module; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. + */ +#include "debug_syslog.h" + +#include <stdio.h> +#include <string.h> +#include <time.h> + +#ifdef WIN32 +#include <ws2tcpip.h> +#include <WinSock2.h> +typedef SOCKET socket_t; +#else +typedef int socket_t; +#include <sys/socket.h> +#include <netinet/in.h> +#include <arpa/inet.h> +#include <netdb.h> +#endif + +#include <unistd.h> +#include <errno.h> + +#include "debug_util.h" + +#ifndef WITH_DBG_SYSLOG +#warning debug_syslog.c compiled but WITH_DBG_SYSLOG not defined +#endif + +#define SYSLOG_MSGLEN 1024 +#define SYSLOG_PRILEN 5 +#define SYSLOG_TIMELEN 32 +#define SYSLOG_TAGLEN 32 +#define SYSLOG_CONTENTLEN SYSLOG_MSGLEN - SYSLOG_PRILEN - SYSLOG_TIMELEN - SYSLOG_TAGLEN +//#define SYSLOG_CONTENTLEN SYSLOG_MSGLEN - SYSLOG_PRILEN - SYSLOG_TAGLEN - SYSLOG_HEADERLEN -1 + +#define SYSLOG_LENOFEXECNAME 256 + +static int dbg_syslog_sock; +static struct sockaddr_in dbg_syslog_sockaddr; +static pid_t pid; +static char execname[SYSLOG_LENOFEXECNAME]; + +#ifdef WIN32 +static void wsastartup() +{ + WORD wVersionRequested = MAKEWORD(2, 0); + WSADATA wsaData; + + int ret = WSAStartup(wVersionRequested, &wsaData); + if(ret != 0) { + fprintf(stderr, "WSAStartup failed.\n"); + } +} +#endif + +void dbg_syslog_init(const char* host, int port) +{ + +#ifdef WIN32 + wsastartup(); +#endif + + printf("Initializing syslog module remote %s:%d\n", host, port); + if ( (dbg_syslog_sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) { + fprintf(stderr, "Failed to create socket\n"); + return; + } + memset(&dbg_syslog_sockaddr, 0, sizeof(dbg_syslog_sockaddr)); + dbg_syslog_sockaddr.sin_family = AF_INET; +// dbg_syslog_sockaddr.sin_addr.s_addr = inet_addr(host); + struct hostent *hp = gethostbyname(host); + memcpy(&(dbg_syslog_sockaddr.sin_addr),*(hp->h_addr_list),sizeof(struct in_addr)); + dbg_syslog_sockaddr.sin_port = htons(port); + + // This implementation has all kind of possible errors: + // * It is Linux only + // * Max length of execname (including path, avoid this by cmdline file in reverse order) + // is set to SYSLOG_LENOFEXECNAME + // * If not found execname is "" + pid = getpid(); + char buf[SYSLOG_LENOFEXECNAME]; + FILE* f = fopen("/proc/self/cmdline", "r"); + if(f) { + char* s = NULL; + s = fgets(buf, SYSLOG_LENOFEXECNAME, f); + fclose(f); + } + + char* bufptr = strrchr(buf, '/'); + if(bufptr) { + strncpy(execname, bufptr+1, SYSLOG_LENOFEXECNAME-1); + } + else { + strcpy(execname, "\0"); + } + + printf("\tRunning as %s with pid %d\n", execname, pid); +} + +/* +void dbg_syslog_createheader() { + const time_t rawtime = time(NULL); + struct tm time; + localtime_r(&rawtime, &time); + char timebuf[256]; + strftime(timebuf, 256, "%b %e %H:%M:%S ", &time); + + char bufpri[SYSLOG_PRILEN] = "<20>"; + char buftag[SYSLOG_TAGLEN] = "PROGRAM[PID]: "; + +} +*/ + +/* + * Syslog message specification (based on rfc3164). + * Modified after reading syslog v2. documentation + * + * MSG: "<%d%d>%s %s %s%c%s", FACILITY, SEVERITY, TIME, CLIENT, TAG, DELIM, CONTENT + * + * Example: + * <34>Oct 11 22:14:15 mymachine su: 'su root' failed for lonvick on /dev/pts/8 + * + * + * NOTE! Length of MSG must not exceed 1024 characters! + * + * FACILITY: + * 0 kernel messages + * 1 user-level messages + * 2 mail system + * 3 system daemons + * 4 security/authorization messages (note 1) + * 5 messages generated internally by syslogd + * 6 line printer subsystem + * 7 network news subsystem + * 8 UUCP subsystem + * 9 clock daemon (note 2) + * 10 security/authorization messages (note 1) + * 11 FTP daemon + * 12 NTP subsystem + * 13 log audit (note 1) + * 14 log alert (note 1) + * 15 clock daemon (note 2) + * 16 local use 0 (local0) + * 17 local use 1 (local1) + * 18 local use 2 (local2) + * 19 local use 3 (local3) + * 20 local use 4 (local4) + * 21 local use 5 (local5) + * 22 local use 6 (local6) + * 23 local use 7 (local7) + * + * SEVERITY: + * 0 Emergency: system is unusable + * 1 Alert: action must be taken immediately + * 2 Critical: critical conditions + * 3 Error: error conditions + * 4 Warning: warning conditions + * 5 Notice: normal but significant condition + * 6 Informational: informational messages + * 7 Debug: debug-level messages + * + * TIME: + * Time of message formatted like: Mmm dd hh:mm:ss + * + * CLIENT: + * Hostname or + * IPv4 address or + * IPv6 address + * + * TAG: format: PROGRAM[PID] + * Program or process information + * PROGRAM is Alphanumeric + * PID is numeric + * Must not exceed 32 characters + * + * DELIM: + * A nonn-alphanumeric character (eg. ':', '[' ...) + * In implementation DELIM is the first character of CONTENT + * + * CONTENT: + * The message to log. + * String of printable characters + * + * */ + +void dbg_syslog_output(char* msg) +{ + if(dbg_syslog_sock < 0) return; + + const time_t rawtime = time(NULL); + struct tm time; + dbg_localtime(&rawtime, &time); + char buftime[SYSLOG_TIMELEN]; + strftime(buftime, SYSLOG_TIMELEN, "%b %e %H:%M:%S ", &time); + + // Currently everything is mapped to local facility 4 as debug + char bufpri[SYSLOG_PRILEN]; + strncpy(bufpri, "<167>", SYSLOG_PRILEN); + + char buftag[SYSLOG_TAGLEN]; + snprintf(buftag, SYSLOG_TAGLEN, "%s[%d]: ", execname, pid); + + char buf[SYSLOG_MSGLEN]; + memset(buf, 0, sizeof(buf)); + strncat(buf, bufpri, SYSLOG_PRILEN); + strncat(buf, buftime, SYSLOG_TIMELEN); + strncat(buf, buftag, SYSLOG_TAGLEN); + strncat(buf, msg, SYSLOG_CONTENTLEN); + strcat(buf, "\n"); + + +// printf("Sending to syslog: %s\n", buf); + int buf_len = strlen(buf); + if((sendto(dbg_syslog_sock, buf, buf_len, 0, (struct sockaddr *) &dbg_syslog_sockaddr, + sizeof(dbg_syslog_sockaddr))) != buf_len) { + fprintf(stderr, "Failed to send message successfully: %s\n", strerror(errno)); + } +} + +void dbg_syslog_close() { + printf("Closing syslog module\n"); + if(dbg_syslog_sock < 0) return; + +#ifdef WIN32 + closesocket(dbg_syslog_sock); + WSACleanup(); +#else + close(dbg_syslog_sock); +#endif +} + +#ifdef TEST_DEBUG_SYSLOG +//Additional dependency files +//deps: +//Required cflags (autoconf vars may be used) +//cflags: +//Required link options (autoconf vars may be used) +//libs: +#include "test.h" + +TEST_BEGIN; + +// TODO: Put some testcode here (see test.h for usable macros). +TEST_TRUE(false, "No tests yet!"); + +TEST_END; + +#endif/*TEST_DEBUG_SYSLOG*/ |