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platform_bionic/libc/include/syslog.h
Elliott Hughes 213d943a33 syslog.h: implement LOG_PERROR. 
This is the one openlog() flag that toybox uses. We should probably try
to unify toybox's POSIX logger and Android-specific log at some point,
and this will help.

Also fix our behavior with an empty format string, noticed while adding
tests.

Test: treehugger
Test: adb shell logger -s foo
Change-Id: Ic027e78a460be3db83cc4c6f9946c9efa22be6e1
2023-05-03 14:19:40 -07:00

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/*
* Copyright (C) 2008 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#pragma once
#include <stdio.h>
#include <sys/cdefs.h>
#include <stdarg.h>
__BEGIN_DECLS
/** Corresponds to the Android ERROR log priority. */
#define LOG_EMERG 0
/** Corresponds to the Android ERROR log priority. */
#define LOG_ALERT 1
/** Corresponds to the Android ERROR log priority. */
#define LOG_CRIT 2
/** Corresponds to the Android ERROR log priority. */
#define LOG_ERR 3
/** Corresponds to the Android WARN log priority. */
#define LOG_WARNING 4
/** Corresponds to the Android INFO log priority. */
#define LOG_NOTICE 5
/** Corresponds to the Android INFO log priority. */
#define LOG_INFO 6
/** Corresponds to the Android DEBUG log priority. */
#define LOG_DEBUG 7
#define LOG_PRIMASK 7
#define LOG_PRI(x) ((x) & LOG_PRIMASK)
#define LOG_MAKEPRI(fac, pri) ((fac) | (pri))
/** Currently ignored on Android. */
#define LOG_KERN (0<<3)
/** Currently ignored on Android. */
#define LOG_USER (1<<3)
/** Currently ignored on Android. */
#define LOG_MAIL (2<<3)
/** Currently ignored on Android. */
#define LOG_DAEMON (3<<3)
/** Currently ignored on Android. */
#define LOG_AUTH (4<<3)
/** Currently ignored on Android. */
#define LOG_SYSLOG (5<<3)
/** Currently ignored on Android. */
#define LOG_LPR (6<<3)
/** Currently ignored on Android. */
#define LOG_NEWS (7<<3)
/** Currently ignored on Android. */
#define LOG_UUCP (8<<3)
/** Currently ignored on Android. */
#define LOG_CRON (9<<3)
/** Currently ignored on Android. */
#define LOG_AUTHPRIV (10<<3)
/** Currently ignored on Android. */
#define LOG_FTP (11<<3)
/** Currently ignored on Android. */
#define LOG_LOCAL0 (16<<3)
/** Currently ignored on Android. */
#define LOG_LOCAL1 (17<<3)
/** Currently ignored on Android. */
#define LOG_LOCAL2 (18<<3)
/** Currently ignored on Android. */
#define LOG_LOCAL3 (19<<3)
/** Currently ignored on Android. */
#define LOG_LOCAL4 (20<<3)
/** Currently ignored on Android. */
#define LOG_LOCAL5 (21<<3)
/** Currently ignored on Android. */
#define LOG_LOCAL6 (22<<3)
/** Currently ignored on Android. */
#define LOG_LOCAL7 (23<<3)
#define LOG_NFACILITIES 24
#define LOG_FACMASK 0x3f8
#define LOG_FAC(x) (((x) >> 3) & (LOG_FACMASK >> 3))
/**
* Converts a log priority into a mask enabling that single priority,
* for use with setlogmask().
*/
#define LOG_MASK(pri) (1 << (pri))
/**
* Converts a log priority into a mask enabling that priority and all lower
* priorities, for use with setlogmask().
*/
#define LOG_UPTO(pri) ((1 << ((pri)+1)) - 1)
/** openlog() option ignored on Android. */
#define LOG_PID 0x01
/** openlog() option ignored on Android. */
#define LOG_CONS 0x02
/** openlog() option ignored on Android. */
#define LOG_ODELAY 0x04
/** openlog() option ignored on Android. */
#define LOG_NDELAY 0x08
/** openlog() option ignored on Android. */
#define LOG_NOWAIT 0x10
/**
* openlog() option to log to stderr as well as the system log.
*
* Available since API level 34 (ignored before then).
*/
#define LOG_PERROR 0x20
/**
* [closelog(3)](http://man7.org/linux/man-pages/man3/closelog.3.html) does
* nothing on Android.
*/
void closelog(void);
/**
* [openlog(3)](http://man7.org/linux/man-pages/man3/openlog.3.html) sets
* the log tag to `__prefix`, which can be NULL to return to the default of
* getprogname(). On Android, the other two arguments are ignored.
*/
void openlog(const char* _Nullable __prefix, int __option, int __facility);
/**
* [setlogmask(3)](http://man7.org/linux/man-pages/man3/setlogmask.3.html)
* sets which log priorities will actually be logged. See `LOG_MASK` and
* `LOG_UPTO`.
*/
int setlogmask(int __mask);
/**
* [syslog(3)](http://man7.org/linux/man-pages/man3/syslog.3.html) formats
* the printf()-like message and logs it with the given priority, unless
* suppressed by setlogmask(). On Android, the output goes to logcat.
*/
void syslog(int __priority, const char* _Nonnull __fmt, ...) __printflike(2, 3);
/**
* [vsyslog(3)](http://man7.org/linux/man-pages/man3/vsyslog.3.html) formats
* the vprintf()-like message and logs it with the given priority, unless
* suppressed by setlogmask(). On Android, the output goes to logcat.
*/
void vsyslog(int __priority, const char* _Nonnull __fmt, va_list __args) __printflike(2, 0);
__END_DECLS
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