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/* * ProFTPD - FTP server daemon * Copyright (c) 1997, 1998 Public Flood Software * Copyright (c) 1999, 2000 MacGyver aka Habeeb J. Dihu <macgyver@tos.net> * Copyright (c) 2001-2016 The ProFTPD Project team * * 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, Suite 500, Boston, MA 02110-1335, USA. * * As a special exemption, Public Flood Software/MacGyver aka Habeeb J. Dihu * and other respective copyright holders give permission to link this program * with OpenSSL, and distribute the resulting executable, without including * the source code for OpenSSL in the source distribution. */ /* Logging, either to syslog or stderr, as well as debug logging * and debug levels. */ #ifndef PR_LOG_H #define PR_LOG_H #ifndef LOG_AUTHPRIV #define LOG_AUTHPRIV LOG_AUTH #endif #if !defined(WTMP_FILE) && defined(_PATH_WTMP) #define WTMP_FILE _PATH_WTMP #endif /* These are the debug levels, higher numbers print more debugging * info. DEBUG0 (the default) prints nothing. */ #define DEBUG10 10 #define DEBUG9 9 #define DEBUG8 8 #define DEBUG7 7 #define DEBUG6 6 #define DEBUG5 5 #define DEBUG4 4 #define DEBUG3 3 #define DEBUG2 2 #define DEBUG1 1 #define DEBUG0 0 /* pr_log_openfile() return values */ #define PR_LOG_WRITABLE_DIR -2 #define PR_LOG_SYMLINK -3 /* Log file modes */ #define PR_LOG_SYSTEM_MODE 0640 #ifdef PR_USE_LASTLOG /* It is tempting to want to have these lastlog-related includes separated * out into their own lastlog.h file. However, on some systems, such a * proftpd-specific lastlog.h file may collide with the system's lastlog.h * file. Ultimately it's an issue with the default search order of the * system C preprocessor, not with us -- and not every installation has * this problem. * * In the meantime, the most portable thing is to keep these lastlog-related * includes in this file. Yay portability. */ #ifdef HAVE_LASTLOG_H # include <lastlog.h> #endif #ifdef HAVE_LOGIN_H # include <login.h> #endif #ifdef HAVE_PATHS_H # include <paths.h> #endif #ifndef PR_LASTLOG_PATH # ifdef _PATH_LASTLOG # define PR_LASTLOG_PATH _PATH_LASTLOG # else # ifdef LASTLOG_FILE # define PR_LASTLOG_PATH LASTLOG_FILE # else # error "Missing path to lastlog file (use --with-lastlog=PATH)" # endif # endif #endif int log_lastlog(uid_t uid, const char *user_name, const char *tty, const pr_netaddr_t *remote_addr); #endif /* PR_USE_LASTLOG */ /* Note: Like lastlog.h, it would be tempting to split out the declaration of * this function, and its necessary system headers, into a proftpd-specific * wtmp.h file. But that would collide with the system wtmp.h file on * some systems. */ int log_wtmp(const char *, const char *, const char *, const pr_netaddr_t *); /* file-based logging functions */ int pr_log_openfile(const char *, int *, mode_t); int pr_log_writefile(int, const char *, const char *, ...) #ifdef __GNUC__ __attribute__ ((format (printf, 3, 4))); #else ; #endif /* Same as pr_log_writefile(), only this function takes a va_list. * Useful for modules which provide their own varargs wrapper log functions, * but still want to use the core facilities for writing to the log fd. */ int pr_log_vwritefile(int, const char *, const char *, va_list ap); /* syslog-based logging functions. Note that the open/close functions are * not part of the public API; use the pr_log_pri() function to log via * syslog. */ void log_closesyslog(void); int log_opensyslog(const char *); int log_getfacility(void); void log_setfacility(int); void pr_log_pri(int, const char *, ...) #ifdef __GNUC__ __attribute__ ((format (printf, 2, 3))); #else ; #endif void pr_log_auth(int, const char *, ...) #ifdef __GNUC__ __attribute__ ((format (printf, 2, 3))); #else ; #endif void pr_log_debug(int, const char *, ...) #ifdef __GNUC__ __attribute__ ((format (printf, 2, 3))); #else ; #endif int pr_log_setdebuglevel(int); int pr_log_setdefaultlevel(int); void log_stderr(int); void log_discard(void); void init_log(void); int pr_log_str2sysloglevel(const char *); /* Define a struct, and some constants, for logging events and any listeners * for those events. */ typedef struct log_event { /* Type of log event/message; the values are defined below */ unsigned int log_type; /* Log fd associated with this log for this event */ int log_fd; /* Log level of this message; the semantics of the log level depend on * on the log type. */ int log_level; /* The message being logged. */ const char *log_msg; size_t log_msglen; } pr_log_event_t; #define PR_LOG_TYPE_UNSPEC 0 #define PR_LOG_NAME_UNSPEC "core.log.unspec" #define PR_LOG_TYPE_XFERLOG 1 #define PR_LOG_NAME_XFERLOG "core.log.xferlog" #define PR_LOG_TYPE_SYSLOG 2 #define PR_LOG_NAME_SYSLOG "core.log.syslog" #define PR_LOG_TYPE_SYSTEMLOG 3 #define PR_LOG_NAME_SYSTEMLOG "core.log.systemlog" #define PR_LOG_TYPE_EXTLOG 4 #define PR_LOG_NAME_EXTLOG "core.log.extendedlog" #define PR_LOG_TYPE_TRACELOG 5 #define PR_LOG_NAME_TRACELOG "core.log.tracelog" /* Helper function to generate the necessary log event, passing along the * log event context data. */ int pr_log_event_generate(unsigned int log_type, int log_fd, int log_level, const char *log_msg, size_t log_msglen); /* Returns TRUE if there are listeners for the specified log type, FALSE * otherwise. */ int pr_log_event_listening(unsigned int log_type); /* Log a stacktrace, starting at the location of the calling function. * Note that if fd is less than zero, OR if the given name is null, then the * stacktrace will be logged using pr_log_pri(), otherwise the stacktrace will * be written to the provided file descriptor. */ void pr_log_stacktrace(int fd, const char *name); #endif /* PR_LOG_H */