/*
* 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) 2001-2020 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);
/* Set options that affect the format of the logged messages. */
int pr_log_set_options(unsigned long log_opts);
#define PR_LOG_OPT_USE_TIMESTAMP 0x0001
#define PR_LOG_OPT_USE_HOSTNAME 0x0002
#define PR_LOG_OPT_USE_VHOST 0x0004
#define PR_LOG_OPT_USE_ROLE_BASED_PROCESS_LABELS 0x0008
#define PR_LOG_OPT_DEFAULT (PR_LOG_OPT_USE_TIMESTAMP|PR_LOG_OPT_USE_HOSTNAME|PR_LOG_OPT_USE_VHOST)
#endif /* PR_LOG_H */
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