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/*****************************************************************************
* Written by Chris Dunlap <cdunlap@llnl.gov>.
* Copyright (C) 2007-2022 Lawrence Livermore National Security, LLC.
* Copyright (C) 2001-2007 The Regents of the University of California.
* UCRL-CODE-2002-009.
*
* This file is part of ConMan: The Console Manager.
* For details, see <https://dun.github.io/conman/>.
*
* ConMan 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 3 of the License, or (at your option)
* any later version.
*
* ConMan 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 ConMan. If not, see <http://www.gnu.org/licenses/>.
*****************************************************************************/
#ifndef _LOG_H
#define _LOG_H
#if HAVE_CONFIG_H
# include <config.h>
#endif /* HAVE_CONFIG_H */
#include <stdio.h>
#include <syslog.h>
/* Global used by the daemonize routines to allow the grandchild process to
* return status back to the parent process. This is set to a valid fd in
* begin_daemonize() and then cleared in end_daemonize().
*/
extern int log_daemonize_fd;
/* DPRINTF((level, format, ...))
* A wrapper for debug_printf() so it can be removed from production code.
*/
#ifndef NDEBUG
# define DPRINTF(args) debug_printf args
#else /* NDEBUG */
# define DPRINTF(args)
#endif /* !NDEBUG */
void debug_printf(int level, const char *format, ...);
/*
* Similar to printf, except output is always to stderr and only done
* when 'level' is less than or equal to the "DEBUG" env var.
*/
void log_set_file(FILE *fp, int priority, int timestamp);
/*
* If (fp) is non-null, logging of messages at the (priority) level
* and higher to the specified file is enabled; o/w, logging to
* the previously-specified file is disabled. If (timestamp) is
* non-zero, timestamps will be prepended to each message.
*/
void log_set_syslog(char *ident, int facility);
/*
* If (ident) is non-null, logging via syslog is enabled to (facility)
* using (ident) as the string which will be prepended to each message;
* o/w, logging via syslog is disabled.
* Note that only the trailing "filename" component of (ident) is used.
*/
void log_set_err_pipe(int fd);
/*
* Sets the file-descriptor for the write-half of the daemonize pipe
* connecting the original parent process to the forked grandchild process
* under which the daemon will continue running.
* If set (ie, fd >= 0), log_err() will return an error status back to the
* original parent process.
*/
void log_err(int errnum, const char *format, ...);
/*
* Generates a fatal-error message according to the printf-style (format)
* string and terminates program execution; if a non-zero (errnum) is
* specified, a string describing the error code will be appended to
* the message.
* During debug, messages are written to stderr; o/w, they are written
* to the syslog facility.
*/
void log_msg(int priority, const char *format, ...);
/*
* Generates a non-fatal message according to the printf-style (format)
* string. The (priority) level is passed to syslog.
* During debug, messages are written to stderr; o/w, they are written
* to the syslog facility.
*/
#endif /* !_LOG_H */
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