freebsd-dev/sbin/hastd/pjdlog.c

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/*-
* Copyright (c) 2009-2010 The FreeBSD Foundation
* Copyright (c) 2011 Pawel Jakub Dawidek <pjd@FreeBSD.org>
* All rights reserved.
*
* This software was developed by Pawel Jakub Dawidek under sponsorship from
* the FreeBSD Foundation.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS 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 AUTHORS 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <assert.h>
#include <errno.h>
#include <libutil.h>
#include <printf.h>
#include <stdarg.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include "pjdlog.h"
#define PJDLOG_NEVER_INITIALIZED 0
#define PJDLOG_NOT_INITIALIZED 1
#define PJDLOG_INITIALIZED 2
static int pjdlog_initialized = PJDLOG_NEVER_INITIALIZED;
static int pjdlog_mode, pjdlog_debug_level;
static char pjdlog_prefix[128];
static int
pjdlog_printf_arginfo_humanized_number(const struct printf_info *pi __unused,
size_t n, int *argt)
{
assert(n >= 1);
argt[0] = PA_INT | PA_FLAG_INTMAX;
return (1);
}
static int
pjdlog_printf_render_humanized_number(struct __printf_io *io,
const struct printf_info *pi, const void * const *arg)
{
char buf[5];
intmax_t num;
int ret;
num = *(const intmax_t *)arg[0];
humanize_number(buf, sizeof(buf), (int64_t)num, "", HN_AUTOSCALE,
HN_NOSPACE | HN_DECIMAL);
ret = __printf_out(io, pi, buf, strlen(buf));
__printf_flush(io);
return (ret);
}
static int
pjdlog_printf_arginfo_sockaddr(const struct printf_info *pi __unused,
size_t n, int *argt)
{
assert(n >= 1);
argt[0] = PA_POINTER;
return (1);
}
static int
pjdlog_printf_render_sockaddr(struct __printf_io *io,
const struct printf_info *pi, const void * const *arg)
{
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const struct sockaddr_storage *ss;
char buf[64];
int ret;
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ss = *(const struct sockaddr_storage * const *)arg[0];
switch (ss->ss_family) {
case AF_INET:
{
char addr[INET_ADDRSTRLEN];
const struct sockaddr_in *sin;
unsigned int port;
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sin = (const struct sockaddr_in *)ss;
port = ntohs(sin->sin_port);
if (inet_ntop(ss->ss_family, &sin->sin_addr, addr,
sizeof(addr)) == NULL) {
PJDLOG_ABORT("inet_ntop(AF_INET) failed: %s.",
strerror(errno));
}
snprintf(buf, sizeof(buf), "%s:%u", addr, port);
break;
}
case AF_INET6:
{
char addr[INET6_ADDRSTRLEN];
const struct sockaddr_in6 *sin;
unsigned int port;
sin = (const struct sockaddr_in6 *)ss;
port = ntohs(sin->sin6_port);
if (inet_ntop(ss->ss_family, &sin->sin6_addr, addr,
sizeof(addr)) == NULL) {
PJDLOG_ABORT("inet_ntop(AF_INET6) failed: %s.",
strerror(errno));
}
snprintf(buf, sizeof(buf), "[%s]:%u", addr, port);
break;
}
default:
snprintf(buf, sizeof(buf), "[unsupported family %hhu]",
ss->ss_family);
break;
}
ret = __printf_out(io, pi, buf, strlen(buf));
__printf_flush(io);
return (ret);
}
void
pjdlog_init(int mode)
{
int saved_errno;
assert(pjdlog_initialized == PJDLOG_NEVER_INITIALIZED ||
pjdlog_initialized == PJDLOG_NOT_INITIALIZED);
assert(mode == PJDLOG_MODE_STD || mode == PJDLOG_MODE_SYSLOG);
saved_errno = errno;
if (pjdlog_initialized == PJDLOG_NEVER_INITIALIZED) {
__use_xprintf = 1;
register_printf_render_std("T");
register_printf_render('N',
pjdlog_printf_render_humanized_number,
pjdlog_printf_arginfo_humanized_number);
register_printf_render('S',
pjdlog_printf_render_sockaddr,
pjdlog_printf_arginfo_sockaddr);
}
if (mode == PJDLOG_MODE_SYSLOG)
openlog(NULL, LOG_PID | LOG_NDELAY, LOG_DAEMON);
pjdlog_mode = mode;
pjdlog_debug_level = 0;
bzero(pjdlog_prefix, sizeof(pjdlog_prefix));
pjdlog_initialized = PJDLOG_INITIALIZED;
errno = saved_errno;
}
void
pjdlog_fini(void)
{
int saved_errno;
assert(pjdlog_initialized == PJDLOG_INITIALIZED);
saved_errno = errno;
if (pjdlog_mode == PJDLOG_MODE_SYSLOG)
closelog();
pjdlog_initialized = PJDLOG_NOT_INITIALIZED;
errno = saved_errno;
}
/*
* Configure where the logs should go.
* By default they are send to stdout/stderr, but after going into background
* (eg. by calling daemon(3)) application is responsible for changing mode to
* PJDLOG_MODE_SYSLOG, so logs will be send to syslog.
*/
void
pjdlog_mode_set(int mode)
{
int saved_errno;
assert(pjdlog_initialized == PJDLOG_INITIALIZED);
assert(mode == PJDLOG_MODE_STD || mode == PJDLOG_MODE_SYSLOG);
if (pjdlog_mode == mode)
return;
saved_errno = errno;
if (mode == PJDLOG_MODE_SYSLOG)
openlog(NULL, LOG_PID | LOG_NDELAY, LOG_DAEMON);
else /* if (mode == PJDLOG_MODE_STD) */
closelog();
pjdlog_mode = mode;
errno = saved_errno;
}
/*
* Return current mode.
*/
int
pjdlog_mode_get(void)
{
assert(pjdlog_initialized == PJDLOG_INITIALIZED);
return (pjdlog_mode);
}
/*
* Set debug level. All the logs above the level specified here will be
* ignored.
*/
void
pjdlog_debug_set(int level)
{
assert(pjdlog_initialized == PJDLOG_INITIALIZED);
assert(level >= 0);
pjdlog_debug_level = level;
}
/*
* Return current debug level.
*/
int
pjdlog_debug_get(void)
{
assert(pjdlog_initialized == PJDLOG_INITIALIZED);
return (pjdlog_debug_level);
}
/*
* Set prefix that will be used before each log.
* Setting prefix to NULL will remove it.
*/
void
pjdlog_prefix_set(const char *fmt, ...)
{
va_list ap;
assert(pjdlog_initialized == PJDLOG_INITIALIZED);
va_start(ap, fmt);
pjdlogv_prefix_set(fmt, ap);
va_end(ap);
}
/*
* Set prefix that will be used before each log.
* Setting prefix to NULL will remove it.
*/
void
pjdlogv_prefix_set(const char *fmt, va_list ap)
{
int saved_errno;
assert(pjdlog_initialized == PJDLOG_INITIALIZED);
assert(fmt != NULL);
saved_errno = errno;
vsnprintf(pjdlog_prefix, sizeof(pjdlog_prefix), fmt, ap);
errno = saved_errno;
}
/*
* Convert log level into string.
*/
static const char *
pjdlog_level_string(int loglevel)
{
switch (loglevel) {
case LOG_EMERG:
return ("EMERG");
case LOG_ALERT:
return ("ALERT");
case LOG_CRIT:
return ("CRIT");
case LOG_ERR:
return ("ERROR");
case LOG_WARNING:
return ("WARNING");
case LOG_NOTICE:
return ("NOTICE");
case LOG_INFO:
return ("INFO");
case LOG_DEBUG:
return ("DEBUG");
}
assert(!"Invalid log level.");
abort(); /* XXX: gcc */
}
/*
* Common log routine.
*/
void
pjdlog_common(int loglevel, int debuglevel, int error, const char *fmt, ...)
{
va_list ap;
assert(pjdlog_initialized == PJDLOG_INITIALIZED);
va_start(ap, fmt);
pjdlogv_common(loglevel, debuglevel, error, fmt, ap);
va_end(ap);
}
/*
* Common log routine, which can handle regular log level as well as debug
* level. We decide here where to send the logs (stdout/stderr or syslog).
*/
void
pjdlogv_common(int loglevel, int debuglevel, int error, const char *fmt,
va_list ap)
{
int saved_errno;
assert(pjdlog_initialized == PJDLOG_INITIALIZED);
assert(loglevel == LOG_EMERG || loglevel == LOG_ALERT ||
loglevel == LOG_CRIT || loglevel == LOG_ERR ||
loglevel == LOG_WARNING || loglevel == LOG_NOTICE ||
loglevel == LOG_INFO || loglevel == LOG_DEBUG);
assert(loglevel != LOG_DEBUG || debuglevel > 0);
assert(error >= -1);
/* Ignore debug above configured level. */
if (loglevel == LOG_DEBUG && debuglevel > pjdlog_debug_level)
return;
saved_errno = errno;
switch (pjdlog_mode) {
case PJDLOG_MODE_STD:
{
FILE *out;
/*
* We send errors and warning to stderr and the rest to stdout.
*/
switch (loglevel) {
case LOG_EMERG:
case LOG_ALERT:
case LOG_CRIT:
case LOG_ERR:
case LOG_WARNING:
out = stderr;
break;
case LOG_NOTICE:
case LOG_INFO:
case LOG_DEBUG:
out = stdout;
break;
default:
assert(!"Invalid loglevel.");
abort(); /* XXX: gcc */
}
fprintf(out, "[%s]", pjdlog_level_string(loglevel));
/* Attach debuglevel if this is debug log. */
if (loglevel == LOG_DEBUG)
fprintf(out, "[%d]", debuglevel);
fprintf(out, " %s", pjdlog_prefix);
vfprintf(out, fmt, ap);
if (error != -1)
fprintf(out, ": %s.", strerror(error));
fprintf(out, "\n");
fflush(out);
break;
}
case PJDLOG_MODE_SYSLOG:
{
char log[1024];
int len;
len = snprintf(log, sizeof(log), "%s", pjdlog_prefix);
if ((size_t)len < sizeof(log))
len += vsnprintf(log + len, sizeof(log) - len, fmt, ap);
if (error != -1 && (size_t)len < sizeof(log)) {
(void)snprintf(log + len, sizeof(log) - len, ": %s.",
strerror(error));
}
syslog(loglevel, "%s", log);
break;
}
default:
assert(!"Invalid mode.");
}
errno = saved_errno;
}
/*
* Regular logs.
*/
void
pjdlogv(int loglevel, const char *fmt, va_list ap)
{
assert(pjdlog_initialized == PJDLOG_INITIALIZED);
/* LOG_DEBUG is invalid here, pjdlogv?_debug() should be used. */
assert(loglevel == LOG_EMERG || loglevel == LOG_ALERT ||
loglevel == LOG_CRIT || loglevel == LOG_ERR ||
loglevel == LOG_WARNING || loglevel == LOG_NOTICE ||
loglevel == LOG_INFO);
pjdlogv_common(loglevel, 0, -1, fmt, ap);
}
/*
* Regular logs.
*/
void
pjdlog(int loglevel, const char *fmt, ...)
{
va_list ap;
assert(pjdlog_initialized == PJDLOG_INITIALIZED);
va_start(ap, fmt);
pjdlogv(loglevel, fmt, ap);
va_end(ap);
}
/*
* Debug logs.
*/
void
pjdlogv_debug(int debuglevel, const char *fmt, va_list ap)
{
assert(pjdlog_initialized == PJDLOG_INITIALIZED);
pjdlogv_common(LOG_DEBUG, debuglevel, -1, fmt, ap);
}
/*
* Debug logs.
*/
void
pjdlog_debug(int debuglevel, const char *fmt, ...)
{
va_list ap;
assert(pjdlog_initialized == PJDLOG_INITIALIZED);
va_start(ap, fmt);
pjdlogv_debug(debuglevel, fmt, ap);
va_end(ap);
}
/*
* Error logs with errno logging.
*/
void
pjdlogv_errno(int loglevel, const char *fmt, va_list ap)
{
assert(pjdlog_initialized == PJDLOG_INITIALIZED);
pjdlogv_common(loglevel, 0, errno, fmt, ap);
}
/*
* Error logs with errno logging.
*/
void
pjdlog_errno(int loglevel, const char *fmt, ...)
{
va_list ap;
assert(pjdlog_initialized == PJDLOG_INITIALIZED);
va_start(ap, fmt);
pjdlogv_errno(loglevel, fmt, ap);
va_end(ap);
}
/*
* Log error, errno and exit.
*/
void
pjdlogv_exit(int exitcode, const char *fmt, va_list ap)
{
assert(pjdlog_initialized == PJDLOG_INITIALIZED);
pjdlogv_errno(LOG_ERR, fmt, ap);
exit(exitcode);
/* NOTREACHED */
}
/*
* Log error, errno and exit.
*/
void
pjdlog_exit(int exitcode, const char *fmt, ...)
{
va_list ap;
assert(pjdlog_initialized == PJDLOG_INITIALIZED);
va_start(ap, fmt);
pjdlogv_exit(exitcode, fmt, ap);
/* NOTREACHED */
va_end(ap);
}
/*
* Log error and exit.
*/
void
pjdlogv_exitx(int exitcode, const char *fmt, va_list ap)
{
assert(pjdlog_initialized == PJDLOG_INITIALIZED);
pjdlogv(LOG_ERR, fmt, ap);
exit(exitcode);
/* NOTREACHED */
}
/*
* Log error and exit.
*/
void
pjdlog_exitx(int exitcode, const char *fmt, ...)
{
va_list ap;
assert(pjdlog_initialized == PJDLOG_INITIALIZED);
va_start(ap, fmt);
pjdlogv_exitx(exitcode, fmt, ap);
/* NOTREACHED */
va_end(ap);
}
/*
* Log failure message and exit.
*/
void
pjdlog_abort(const char *func, const char *file, int line,
const char *failedexpr, const char *fmt, ...)
{
va_list ap;
assert(pjdlog_initialized == PJDLOG_INITIALIZED);
/*
* When there is no message we pass __func__ as 'fmt'.
* It would be cleaner to pass NULL or "", but gcc generates a warning
* for both of those.
*/
if (fmt != func) {
va_start(ap, fmt);
pjdlogv_critical(fmt, ap);
va_end(ap);
}
if (failedexpr == NULL) {
if (func == NULL) {
pjdlog_critical("Aborted at file %s, line %d.", file,
line);
} else {
pjdlog_critical("Aborted at function %s, file %s, line %d.",
func, file, line);
}
} else {
if (func == NULL) {
pjdlog_critical("Assertion failed: (%s), file %s, line %d.",
failedexpr, file, line);
} else {
pjdlog_critical("Assertion failed: (%s), function %s, file %s, line %d.",
failedexpr, func, file, line);
}
}
abort();
}