Merge "Rewrite syslog(3) to use Android logging."
This commit is contained in:
commit
925d388e24
7 changed files with 105 additions and 413 deletions
11
HACKING.txt
11
HACKING.txt
|
@ -81,13 +81,6 @@ libc/
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private/
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# These are private header files meant for use within bionic itself.
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stdio/
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stdlib/
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unistd/
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# These are legacy files of unknown provenance. In the past, bionic was a
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# mess of random versions of random files from all three of FreeBSD, NetBSD,
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# and OpenBSD! We've been working to clean that up, but these directories
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# are basically where all the stuff we haven't got to yet lives.
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dns/
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# Contains the DNS resolver (originates from NetBSD code).
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@ -114,6 +107,10 @@ libc/
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# current upstream source in one of the upstream directories or by
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# switching the file to C++ and cleaning it up.
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stdio/
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# These are legacy files of dubious provenance. We're working to clean
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# this mess up, and this directory should disappear.
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tools/
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# Various tools used to maintain bionic.
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|
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@ -67,7 +67,6 @@ libc_common_src_files := \
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bionic/unlockpt.c \
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stdio/snprintf.c\
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stdio/sprintf.c \
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unistd/syslog.c \
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# Fortify implementations of libc functions.
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libc_common_src_files += \
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@ -218,6 +217,7 @@ libc_bionic_src_files := \
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bionic/stubs.cpp \
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bionic/symlink.cpp \
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bionic/sysconf.cpp \
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bionic/syslog.cpp \
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bionic/sys_siglist.c \
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bionic/sys_signame.c \
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bionic/system_properties.cpp \
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|
|
|
@ -378,6 +378,9 @@ static void out_vformat(Out& o, const char* format, va_list args) {
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} else if (c == '%') {
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buffer[0] = '%';
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buffer[1] = '\0';
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} else if (c == 'm') {
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// syslog-like %m for strerror(errno).
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str = strerror(errno);
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} else {
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__assert(__FILE__, __LINE__, "conversion specifier unsupported");
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}
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75
libc/bionic/syslog.cpp
Normal file
75
libc/bionic/syslog.cpp
Normal file
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@ -0,0 +1,75 @@
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/*
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* Copyright (C) 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <syslog.h>
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#include <stdlib.h>
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#include "private/libc_logging.h"
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static const char* syslog_log_tag = NULL;
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static int syslog_priority_mask = 0xff;
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void closelog() {
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}
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void openlog(const char* log_tag, int /*options*/, int /*facility*/) {
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syslog_log_tag = log_tag;
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}
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int setlogmask(int new_mask) {
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int old_mask = syslog_priority_mask;
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// 0 is used to query the current mask.
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if (new_mask != 0) {
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syslog_priority_mask = new_mask;
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}
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return old_mask;
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}
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void syslog(int priority, const char* fmt, ...) {
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va_list args;
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va_start(args, fmt);
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vsyslog(priority, fmt, args);
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va_end(args);
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}
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void vsyslog(int priority, const char* fmt, va_list args) {
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// Check whether we're supposed to be logging messages of this priority.
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if ((syslog_priority_mask & LOG_MASK(LOG_PRI(priority))) == 0) {
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return;
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}
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// What's our log tag?
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const char* log_tag = syslog_log_tag;
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if (log_tag == NULL) {
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log_tag = getprogname();
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}
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// What's our Android log priority?
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priority &= LOG_PRIMASK;
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int android_log_priority;
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if (priority < LOG_ERR) {
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android_log_priority = ANDROID_LOG_ERROR;
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} else if (priority == LOG_WARNING) {
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android_log_priority = ANDROID_LOG_WARN;
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} else if (priority <= LOG_INFO) {
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android_log_priority = ANDROID_LOG_INFO;
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} else {
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android_log_priority = ANDROID_LOG_DEBUG;
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}
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__libc_format_log_va_list(android_log_priority, log_tag, fmt, args);
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}
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@ -74,20 +74,18 @@ __BEGIN_DECLS
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#define LOG_MASK(pri) (1 << (pri))
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#define LOG_UPTO(pri) ((1 << ((pri)+1)) - 1)
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#define LOG_PID 0x01 /* include pid with message */
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#define LOG_CONS 0x02 /* write to console on logger error */
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#define LOG_ODELAY 0x04 /* delay connection until syslog() */
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#define LOG_NDELAY 0x08 /* open connection immediately */
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#define LOG_NOWAIT 0x10 /* wait for child processes (unused on linux) */
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#define LOG_PERROR 0x20 /* additional logging to stderr */
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#define LOG_PID 0x01
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#define LOG_CONS 0x02
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#define LOG_ODELAY 0x04
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#define LOG_NDELAY 0x08
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#define LOG_NOWAIT 0x10
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#define LOG_PERROR 0x20
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#define _PATH_LOG "/dev/syslog"
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extern void closelog(void);
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extern void openlog(const char *, int, int);
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extern int setlogmask(int);
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extern void syslog(int, const char *, ...) __printflike(2, 3);
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extern void vsyslog(int, const char *, va_list) __printflike(2, 0);
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extern void closelog(void);
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extern void openlog(const char*, int, int);
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extern int setlogmask(int);
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extern void syslog(int, const char*, ...) __printflike(2, 3);
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extern void vsyslog(int, const char*, va_list) __printflike(2, 0);
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__END_DECLS
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|
|
|
@ -1,392 +0,0 @@
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/* $OpenBSD: syslog.c,v 1.28 2005/08/08 08:05:34 espie Exp $ */
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/*
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* Copyright (c) 1983, 1988, 1993
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* The Regents of the University of California. All rights reserved.
|
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*
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* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
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||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
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||||
* 2. 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.
|
||||
* 3. Neither the name of the University nor the names of its contributors
|
||||
* may be used to endorse or promote products derived from this software
|
||||
* without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
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||||
*/
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||||
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/uio.h>
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#include <syslog.h>
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#include <sys/un.h>
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#include <netdb.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <paths.h>
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#include <stdio.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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#include <stdarg.h>
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struct syslog_data {
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int log_file;
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int connected;
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int opened;
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int log_stat;
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const char* log_tag;
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int log_fac;
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int log_mask;
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};
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#define SYSLOG_DATA_INIT {-1, 0, 0, 0, (const char *)0, LOG_USER, 0xff}
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static struct syslog_data sdata = SYSLOG_DATA_INIT;
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extern const char *__progname; /* Program name, from crt0. */
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static void disconnectlog_r(struct syslog_data *); /* disconnect from syslogd */
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static void connectlog_r(struct syslog_data *); /* (re)connect to syslogd */
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#if defined(__LP64__)
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#define SYSLOG_R_VISIBILITY static
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#else
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#define SYSLOG_R_VISIBILITY extern
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#endif
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SYSLOG_R_VISIBILITY void closelog_r(struct syslog_data*);
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SYSLOG_R_VISIBILITY void openlog_r(const char*, int, int, struct syslog_data*);
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SYSLOG_R_VISIBILITY int setlogmask_r(int, struct syslog_data*);
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SYSLOG_R_VISIBILITY void syslog_r(int, struct syslog_data*, const char*, ...) __printflike(3, 4);
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SYSLOG_R_VISIBILITY void vsyslog_r(int, struct syslog_data*, const char*, va_list) __printflike(3, 0);
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/*
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* syslog, vsyslog --
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* print message on log file; output is intended for syslogd(8).
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*/
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void
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syslog(int pri, const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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vsyslog(pri, fmt, ap);
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va_end(ap);
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}
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void
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vsyslog(int pri, const char *fmt, va_list ap)
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{
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vsyslog_r(pri, &sdata, fmt, ap);
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}
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void
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openlog(const char *ident, int logstat, int logfac)
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{
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openlog_r(ident, logstat, logfac, &sdata);
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}
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void
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closelog(void)
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{
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closelog_r(&sdata);
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}
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/* setlogmask -- set the log mask level */
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int
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setlogmask(int pmask)
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{
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return setlogmask_r(pmask, &sdata);
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}
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/* Reentrant version of syslog, i.e. syslog_r() */
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void
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syslog_r(int pri, struct syslog_data *data, const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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vsyslog_r(pri, data, fmt, ap);
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va_end(ap);
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}
|
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void
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vsyslog_r(int pri, struct syslog_data *data, const char *fmt, va_list ap)
|
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{
|
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int cnt;
|
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char ch, *p, *t;
|
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time_t now;
|
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int fd, saved_errno, error;
|
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#define TBUF_LEN 2048
|
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#define FMT_LEN 1024
|
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char *stdp = NULL, tbuf[TBUF_LEN], fmt_cpy[FMT_LEN];
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int tbuf_left, fmt_left, prlen;
|
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|
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#define INTERNALLOG LOG_ERR|LOG_CONS|LOG_PERROR|LOG_PID
|
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/* Check for invalid bits. */
|
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if (pri & ~(LOG_PRIMASK|LOG_FACMASK)) {
|
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if (data == &sdata) {
|
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syslog(INTERNALLOG,
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"syslog: unknown facility/priority: %x", pri);
|
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} else {
|
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syslog_r(INTERNALLOG, data,
|
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"syslog_r: unknown facility/priority: %x", pri);
|
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}
|
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pri &= LOG_PRIMASK|LOG_FACMASK;
|
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}
|
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|
||||
/* Check priority against setlogmask values. */
|
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if (!(LOG_MASK(LOG_PRI(pri)) & data->log_mask))
|
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return;
|
||||
|
||||
saved_errno = errno;
|
||||
|
||||
/* Set default facility if none specified. */
|
||||
if ((pri & LOG_FACMASK) == 0)
|
||||
pri |= data->log_fac;
|
||||
|
||||
/* If we have been called through syslog(), no need for reentrancy. */
|
||||
if (data == &sdata)
|
||||
(void)time(&now);
|
||||
|
||||
p = tbuf;
|
||||
tbuf_left = TBUF_LEN;
|
||||
|
||||
#define DEC() \
|
||||
do { \
|
||||
if (prlen < 0) \
|
||||
prlen = 0; \
|
||||
if (prlen >= tbuf_left) \
|
||||
prlen = tbuf_left - 1; \
|
||||
p += prlen; \
|
||||
tbuf_left -= prlen; \
|
||||
} while (0)
|
||||
|
||||
prlen = snprintf(p, tbuf_left, "<%d>", pri);
|
||||
DEC();
|
||||
|
||||
/*
|
||||
* syslogd will expand time automagically for reentrant case, and
|
||||
* for normal case, just do like before
|
||||
*/
|
||||
if (data == &sdata) {
|
||||
prlen = strftime(p, tbuf_left, "%h %e %T ", localtime(&now));
|
||||
DEC();
|
||||
}
|
||||
|
||||
if (data->log_stat & LOG_PERROR)
|
||||
stdp = p;
|
||||
if (data->log_tag == NULL)
|
||||
data->log_tag = __progname;
|
||||
if (data->log_tag != NULL) {
|
||||
prlen = snprintf(p, tbuf_left, "%s", data->log_tag);
|
||||
DEC();
|
||||
}
|
||||
if (data->log_stat & LOG_PID) {
|
||||
prlen = snprintf(p, tbuf_left, "[%ld]", (long)getpid());
|
||||
DEC();
|
||||
}
|
||||
if (data->log_tag != NULL) {
|
||||
if (tbuf_left > 1) {
|
||||
*p++ = ':';
|
||||
tbuf_left--;
|
||||
}
|
||||
if (tbuf_left > 1) {
|
||||
*p++ = ' ';
|
||||
tbuf_left--;
|
||||
}
|
||||
}
|
||||
|
||||
/* strerror() is not reentrant */
|
||||
|
||||
for (t = fmt_cpy, fmt_left = FMT_LEN; (ch = *fmt); ++fmt) {
|
||||
if (ch == '%' && fmt[1] == 'm') {
|
||||
++fmt;
|
||||
if (data == &sdata) {
|
||||
prlen = snprintf(t, fmt_left, "%s",
|
||||
strerror(saved_errno));
|
||||
} else {
|
||||
prlen = snprintf(t, fmt_left, "Error %d",
|
||||
saved_errno);
|
||||
}
|
||||
if (prlen < 0)
|
||||
prlen = 0;
|
||||
if (prlen >= fmt_left)
|
||||
prlen = fmt_left - 1;
|
||||
t += prlen;
|
||||
fmt_left -= prlen;
|
||||
} else if (ch == '%' && fmt[1] == '%' && fmt_left > 2) {
|
||||
*t++ = '%';
|
||||
*t++ = '%';
|
||||
fmt++;
|
||||
fmt_left -= 2;
|
||||
} else {
|
||||
if (fmt_left > 1) {
|
||||
*t++ = ch;
|
||||
fmt_left--;
|
||||
}
|
||||
}
|
||||
}
|
||||
*t = '\0';
|
||||
|
||||
prlen = vsnprintf(p, tbuf_left, fmt_cpy, ap);
|
||||
DEC();
|
||||
cnt = p - tbuf;
|
||||
|
||||
/* Output to stderr if requested. */
|
||||
if (data->log_stat & LOG_PERROR) {
|
||||
struct iovec iov[2];
|
||||
|
||||
iov[0].iov_base = stdp;
|
||||
iov[0].iov_len = cnt - (stdp - tbuf);
|
||||
iov[1].iov_base = "\n";
|
||||
iov[1].iov_len = 1;
|
||||
(void)writev(STDERR_FILENO, iov, 2);
|
||||
}
|
||||
|
||||
/* Get connected, output the message to the local logger. */
|
||||
if (!data->opened)
|
||||
openlog_r(data->log_tag, data->log_stat, 0, data);
|
||||
connectlog_r(data);
|
||||
|
||||
/*
|
||||
* If the send() failed, there are two likely scenarios:
|
||||
* 1) syslogd was restarted
|
||||
* 2) /dev/log is out of socket buffer space
|
||||
* We attempt to reconnect to /dev/log to take care of
|
||||
* case #1 and keep send()ing data to cover case #2
|
||||
* to give syslogd a chance to empty its socket buffer.
|
||||
*/
|
||||
if ((error = send(data->log_file, tbuf, cnt, 0)) < 0) {
|
||||
if (errno != ENOBUFS) {
|
||||
disconnectlog_r(data);
|
||||
connectlog_r(data);
|
||||
}
|
||||
do {
|
||||
usleep(1);
|
||||
if ((error = send(data->log_file, tbuf, cnt, 0)) >= 0)
|
||||
break;
|
||||
} while (errno == ENOBUFS);
|
||||
}
|
||||
|
||||
/*
|
||||
* Output the message to the console; try not to block
|
||||
* as a blocking console should not stop other processes.
|
||||
* Make sure the error reported is the one from the syslogd failure.
|
||||
*/
|
||||
if (error == -1 && (data->log_stat & LOG_CONS) &&
|
||||
(fd = open(_PATH_CONSOLE, O_WRONLY|O_NONBLOCK, 0)) >= 0) {
|
||||
struct iovec iov[2];
|
||||
|
||||
p = strchr(tbuf, '>') + 1;
|
||||
iov[0].iov_base = p;
|
||||
iov[0].iov_len = cnt - (p - tbuf);
|
||||
iov[1].iov_base = "\r\n";
|
||||
iov[1].iov_len = 2;
|
||||
(void)writev(fd, iov, 2);
|
||||
(void)close(fd);
|
||||
}
|
||||
|
||||
if (data != &sdata)
|
||||
closelog_r(data);
|
||||
}
|
||||
|
||||
static void
|
||||
disconnectlog_r(struct syslog_data *data)
|
||||
{
|
||||
/*
|
||||
* If the user closed the FD and opened another in the same slot,
|
||||
* that's their problem. They should close it before calling on
|
||||
* system services.
|
||||
*/
|
||||
if (data->log_file != -1) {
|
||||
close(data->log_file);
|
||||
data->log_file = -1;
|
||||
}
|
||||
data->connected = 0; /* retry connect */
|
||||
}
|
||||
|
||||
static void
|
||||
connectlog_r(struct syslog_data *data)
|
||||
{
|
||||
union {
|
||||
struct sockaddr syslogAddr;
|
||||
struct sockaddr_un syslogAddrUn;
|
||||
} u;
|
||||
|
||||
#define SyslogAddr u.syslogAddrUn
|
||||
|
||||
if (data->log_file == -1) {
|
||||
if ((data->log_file = socket(AF_UNIX, SOCK_DGRAM, 0)) == -1)
|
||||
return;
|
||||
(void)fcntl(data->log_file, F_SETFD, 1);
|
||||
}
|
||||
if (data->log_file != -1 && !data->connected) {
|
||||
memset(&SyslogAddr, '\0', sizeof(SyslogAddr));
|
||||
#if 0
|
||||
/* BIONIC: no sun_len field to fill on Linux */
|
||||
SyslogAddr.sun_len = sizeof(SyslogAddr);
|
||||
#endif
|
||||
SyslogAddr.sun_family = AF_UNIX;
|
||||
strlcpy(SyslogAddr.sun_path, _PATH_LOG,
|
||||
sizeof(SyslogAddr.sun_path));
|
||||
if (connect(data->log_file, &u.syslogAddr,
|
||||
sizeof(SyslogAddr)) == -1) {
|
||||
(void)close(data->log_file);
|
||||
data->log_file = -1;
|
||||
} else
|
||||
data->connected = 1;
|
||||
}
|
||||
}
|
||||
|
||||
void
|
||||
openlog_r(const char *ident, int logstat, int logfac, struct syslog_data *data)
|
||||
{
|
||||
if (ident != NULL)
|
||||
data->log_tag = ident;
|
||||
data->log_stat = logstat;
|
||||
if (logfac != 0 && (logfac &~ LOG_FACMASK) == 0)
|
||||
data->log_fac = logfac;
|
||||
|
||||
if (data->log_stat & LOG_NDELAY) /* open immediately */
|
||||
connectlog_r(data);
|
||||
|
||||
data->opened = 1; /* ident and facility has been set */
|
||||
}
|
||||
|
||||
void
|
||||
closelog_r(struct syslog_data *data)
|
||||
{
|
||||
(void)close(data->log_file);
|
||||
data->log_file = -1;
|
||||
data->connected = 0;
|
||||
data->log_tag = NULL;
|
||||
}
|
||||
|
||||
/* setlogmask -- set the log mask level */
|
||||
int
|
||||
setlogmask_r(int pmask, struct syslog_data *data)
|
||||
{
|
||||
int omask;
|
||||
|
||||
omask = data->log_mask;
|
||||
if (pmask != 0)
|
||||
data->log_mask = pmask;
|
||||
return (omask);
|
||||
}
|
|
@ -176,3 +176,14 @@ TEST(libc_logging, lld_LLONG_MIN) {
|
|||
GTEST_LOG_(INFO) << "This test does nothing.\n";
|
||||
#endif // __BIONIC__
|
||||
}
|
||||
|
||||
TEST(libc_logging, m) {
|
||||
#if defined(__BIONIC__)
|
||||
char buf[BUFSIZ];
|
||||
errno = EBADF;
|
||||
__libc_format_buffer(buf, sizeof(buf), "<%m>");
|
||||
EXPECT_STREQ("<Bad file number>", buf);
|
||||
#else // __BIONIC__
|
||||
GTEST_LOG_(INFO) << "This test does nothing.\n";
|
||||
#endif // __BIONIC__
|
||||
}
|
||||
|
|
Loading…
Reference in a new issue