C++ LOG_PRI函数代码示例

status_t ChromiumHTTPDataSource::reconnectAtOffset(off64_t offset) {
    Mutex::Autolock autoLock(mLock);

    if (mURI.empty()) {
        return INVALID_OPERATION;
    }

    LOG_PRI(ANDROID_LOG_INFO, LOG_TAG, "Reconnecting...");
    status_t err = connect_l(mURI.c_str(), &mHeaders, offset);
    if (err != OK) {
        LOG_PRI(ANDROID_LOG_INFO, LOG_TAG, "Reconnect failed w/ err 0x%08x", err);
    }

    return err;
}

void vsyslog(int prio, const char *format, va_list ap)
{
	char buf[BUFLEN];
	int len;
	int fd;

	if (__syslog_fd == -1)
		openlog(NULL, 0, 0);

	buf[0] = '<';
	buf[1] = LOG_PRI(prio) + '0';
	buf[2] = '>';
	len = 3;

	if (syslog_flags & LOG_PID)
		len += sprintf(buf + 3, "%s[%u]: ", id, getpid());
	else if (*id)
		len += sprintf(buf + 3, "%s: ", id);

	len += vsnprintf(buf + len, BUFLEN - len, format, ap);

	if (len > BUFLEN - 1)
		len = BUFLEN - 1;
	if (buf[len - 1] != '\n')
		buf[len++] = '\n';

	fd = __syslog_fd;
	if (fd == -1)
		fd = 2;		/* Failed to open log, write to stderr */

	write(fd, buf, len);

	if (syslog_flags & LOG_PERROR)
		_fwrite(buf + 3, len - 3, stderr);
}

const char *
logging_level_prefix(int priority)
{
    /*
     * Using LOG_PRI probably isn't standard, but I don't know a more
     * portable way to determine the log level from priority, since
     * it's perfectly legal for the user to OR the level with the
     * facility when forming priority.
     */
    switch (LOG_PRI(priority)) {
    case LOG_DEBUG:
        return "DEBUG: ";
    case LOG_INFO:
        return "INFO: ";
    case LOG_NOTICE:
        return "NOTICE: ";
    case LOG_WARNING:
        return "WARNING: ";
    case LOG_ERR:
        return "ERR: ";
    case LOG_CRIT:
        return "CRIT: ";
    case LOG_ALERT:
        return "ALERT: ";
    case LOG_EMERG:
        return "EMERG: ";
    default:
        return "UNKNOWN: ";
    }
}

/******************************************************************************
 * vsyslog
 *
 * Generate a log message using FMT and using arguments pointed to by AP.
 */
void vsyslog( int pri, char* fmt, va_list ap )
{
    static char *month[] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun",
                            "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" };
    SYSTEMTIME stm;
    int len;
    char *p;

    if( !(LOG_MASK( LOG_PRI( pri )) & log_mask) )
        return;

    openlog( NULL, 0, pri & LOG_FACMASK );
    if( !initialized )
        return;

    if( !(pri & LOG_FACMASK) )
        pri |= syslog_facility;

    GetLocalTime( &stm );
    len = sprintf( datagramm, "<%d>%s %2d %02d:%02d:%02d %s %s%s: ",
                   pri,
                   month[ stm.wMonth - 1 ], stm.wDay, stm.wHour, stm.wMinute, stm.wSecond,
                   local_hostname, syslog_ident? syslog_ident : "", str_pid );
    vsnprintf( datagramm + len, datagramm_size - len, fmt, ap );
    p = strchr( datagramm, '\n' );
    if( p )
        *p = 0;
    p = strchr( datagramm, '\r' );
    if( p )
        *p = 0;

    sendto( sock, datagramm, strlen(datagramm), 0, (SOCKADDR*) &sa_logger, sizeof(SOCKADDR_IN) );
}

void __syslog_chk(int priority, int flag, const char *message, ...)
{
    LOCK(lock);

    va_list ap;
    va_start(ap, message);

    char timebuf[16];
    time_t now;
    struct tm tm;
    char buf[256];
    int pid;
    int l, l2;

    if (!(priority & LOG_FACMASK)) priority |= log_facility;

    now = time(NULL);
    gmtime_r(&now, &tm);
    strftime(timebuf, sizeof timebuf, "%b %e %T", &tm);

    pid = (log_opt & LOG_PID) ? getpid() : 0;
    l = snprintf(buf, sizeof buf, "<%d>%s %s%s%.0d%s: ",
                 priority, timebuf, log_ident, "["+!pid, pid, "]"+!pid);
    l2 = vsnprintf(buf+l, sizeof buf - l, message, ap);
    if (l2 >= 0) {
        if (l2 >= sizeof buf - l) l = sizeof buf - 1;
        else l += l2;
        if (buf[l-1] != '\n') buf[l++] = '\n';
        fwrite(buf, 1, l, LOG_PRI(priority) >= LOG_ERR ? stderr : stdout);
    }

    va_end(ap);

    UNLOCK(lock);
}

void server_forward_kmsg(
        Server *s,
        int priority,
        const char *identifier,
        const char *message,
        struct ucred *ucred) {

        struct iovec iovec[5];
        char header_priority[6], header_pid[16];
        int n = 0;
        char *ident_buf = NULL;

        assert(s);
        assert(priority >= 0);
        assert(priority <= 999);
        assert(message);

        if (_unlikely_(LOG_PRI(priority) > s->max_level_kmsg))
                return;

        if (_unlikely_(s->dev_kmsg_fd < 0))
                return;

        /* Never allow messages with kernel facility to be written to
         * kmsg, regardless where the data comes from. */
        priority = syslog_fixup_facility(priority);

        /* First: priority field */
        snprintf(header_priority, sizeof(header_priority), "<%i>", priority);
        char_array_0(header_priority);
        IOVEC_SET_STRING(iovec[n++], header_priority);

        /* Second: identifier and PID */
        if (ucred) {
                if (!identifier) {
                        get_process_comm(ucred->pid, &ident_buf);
                        identifier = ident_buf;
                }

                snprintf(header_pid, sizeof(header_pid), "[%lu]: ", (unsigned long) ucred->pid);
                char_array_0(header_pid);

                if (identifier)
                        IOVEC_SET_STRING(iovec[n++], identifier);

                IOVEC_SET_STRING(iovec[n++], header_pid);
        } else if (identifier) {
                IOVEC_SET_STRING(iovec[n++], identifier);
                IOVEC_SET_STRING(iovec[n++], ": ");
        }

        /* Fourth: message */
        IOVEC_SET_STRING(iovec[n++], message);
        IOVEC_SET_STRING(iovec[n++], "\n");

        if (writev(s->dev_kmsg_fd, iovec, n) < 0)
                log_debug("Failed to write to /dev/kmsg for logging: %m");

        free(ident_buf);
}

status_t ChromiumHTTPDataSource::connect_l(
        const char *uri,
        const KeyedVector<String8, String8> *headers,
        off64_t offset) {
    if (mState != DISCONNECTED) {
        disconnect_l();
    }

    LOG_PRI(ANDROID_LOG_INFO, LOG_TAG,
                "connect to <URL suppressed> @%lld", offset);

    mURI = uri;
    mContentType = String8("application/octet-stream");

    if (headers != NULL) {
        mHeaders = *headers;
    } else {
        mHeaders.clear();
    }

    mState = CONNECTING;
    mContentSize = -1;
    mCurrentOffset = offset;

    mDelegate->initiateConnection(mURI.c_str(), &mHeaders, offset);

    while (mState == CONNECTING || mState == DISCONNECTING) {
        mCondition.wait(mLock);
    }

    return mState == CONNECTED ? OK : mIOResult;
}

/* enqueue the the kernel message into the message queue.
 * The provided msg string is not freed - thus must be done
 * by the caller.
 * rgerhards, 2008-04-12
 */
static rsRetVal
enqMsg(uchar *msg, uchar* pszTag, int iFacility, int iSeverity)
{
	DEFiRet;
	msg_t *pMsg;

	assert(msg != NULL);
	assert(pszTag != NULL);

	CHKiRet(msgConstruct(&pMsg));
	MsgSetFlowControlType(pMsg, eFLOWCTL_LIGHT_DELAY);
	MsgSetInputName(pMsg, pInputName);
	MsgSetRawMsgWOSize(pMsg, (char*)msg);
	MsgSetMSGoffs(pMsg, 0);	/* we do not have a header... */
	MsgSetRcvFrom(pMsg, glbl.GetLocalHostNameProp());
	MsgSetRcvFromIP(pMsg, pLocalHostIP);
	MsgSetHOSTNAME(pMsg, glbl.GetLocalHostName(), ustrlen(glbl.GetLocalHostName()));
	MsgSetTAG(pMsg, pszTag, ustrlen(pszTag));
	pMsg->iFacility = LOG_FAC(iFacility);
	pMsg->iSeverity = LOG_PRI(iSeverity);
	CHKiRet(submitMsg(pMsg));

finalize_it:
	RETiRet;
}

static void parse_fac_prio_20(int pri, char *res20)
{
	CODE *c_pri, *c_fac;

	if (pri != 0) {
		c_fac = facilitynames;
		while (c_fac->c_name) {
			if (c_fac->c_val != (LOG_FAC(pri) << 3)) {
				c_fac++; continue;
			}
			/* facility is found, look for prio */
			c_pri = prioritynames;
			while (c_pri->c_name) {
				if (c_pri->c_val != LOG_PRI(pri)) {
					c_pri++; continue;
				}
				snprintf(res20, 20, "%s.%s",
						c_fac->c_name, c_pri->c_name);
				return;
			}
			/* prio not found, bail out */
			break;
		}
		snprintf(res20, 20, "<%d>", pri);
	}
}

int log_internalv(
                int level,
                int error,
                const char *file,
                int line,
                const char *func,
                const char *format,
                va_list ap) {

        PROTECT_ERRNO;
        char buffer[LINE_MAX];

        if (error < 0)
                error = -error;

        if (_likely_(LOG_PRI(level) > log_max_level))
                return -error;

        /* Make sure that %m maps to the specified error */
        if (error != 0)
                errno = error;

        vsnprintf(buffer, sizeof(buffer), format, ap);

        return log_dispatch(level, error, file, line, func, NULL, NULL, buffer);
}

int log_object_internalv(
                int level,
                int error,
                const char *file,
                int line,
                const char *func,
                const char *object_field,
                const char *object,
                const char *format,
                va_list ap) {

        PROTECT_ERRNO;
        char *buffer, *b;
        size_t l;

        if (error < 0)
                error = -error;

        if (_likely_(LOG_PRI(level) > log_max_level))
                return -error;

        /* Make sure that %m maps to the specified error */
        if (error != 0)
                errno = error;

        /* Prepend the object name before the message */
        if (object) {
                size_t n;

                n = strlen(object);
                l = n + 2 + LINE_MAX;

                buffer = newa(char, l);
                b = stpcpy(stpcpy(buffer, object), ": ");
        } else {

 /**
 *  Log a message to a filedescriptor.
 *  @param fd File descritpor where the log will be written to
 *  @param lf Logging priority (equal to syslog)
 *  @param fmt Format string
 *  @param ap Variable parameter list
 *  @param with_errno Flag if errno should be printed too
 */
void
vlog_msgf(int fd, int lf, const char* fmt, va_list ap, int with_errno)
{
    int level = LOG_PRI(lf);
    char buf[1024];

    if (level_ < level)
    {
        return;
    }

    if (fd > -1)
    {
        dprintf(fd, "%s;", flty_[level]);
        vdprintf(fd, fmt, ap);

        if (with_errno)
        {
            dprintf(fd, " (%s)", strerror(errno));
        }

        dprintf(fd, "\n");
    }
    else
    {
        vsnprintf(buf, sizeof(buf), fmt, ap);
        syslog(level | LOG_DAEMON, "%s", buf);
    }
}

static int write_to_console(
                int level,
                int error,
                const char *file,
                int line,
                const char *func,
                const char *object_field,
                const char *object,
                const char *buffer) {

        char location[256], prefix[1 + DECIMAL_STR_MAX(int) + 2];
        struct iovec iovec[6] = {};
        unsigned n = 0;
        bool highlight;

        if (console_fd < 0)
                return 0;

        if (log_target == LOG_TARGET_CONSOLE_PREFIXED) {
                sprintf(prefix, "<%i>", level);
                IOVEC_SET_STRING(iovec[n++], prefix);
        }

        highlight = LOG_PRI(level) <= LOG_ERR && show_color;

        if (show_location) {
                snprintf(location, sizeof(location), "(%s:%i) ", file, line);
                IOVEC_SET_STRING(iovec[n++], location);
        }

        if (highlight)
                IOVEC_SET_STRING(iovec[n++], ANSI_HIGHLIGHT_RED);
        IOVEC_SET_STRING(iovec[n++], buffer);
        if (highlight)
                IOVEC_SET_STRING(iovec[n++], ANSI_NORMAL);
        IOVEC_SET_STRING(iovec[n++], "\n");

        if (writev(console_fd, iovec, n) < 0) {

                if (errno == EIO && getpid() == 1) {

                        /* If somebody tried to kick us from our
                         * console tty (via vhangup() or suchlike),
                         * try to reconnect */

                        log_close_console();
                        log_open_console();

                        if (console_fd < 0)
                                return 0;

                        if (writev(console_fd, iovec, n) < 0)
                                return -errno;
                } else
                        return -errno;
        }

        return 1;
}

ssize_t ChromiumHTTPDataSource::readAt(off64_t offset, void *data, size_t size) {
    Mutex::Autolock autoLock(mLock);

    if (mState != CONNECTED) {
        return INVALID_OPERATION;
    }

#if 0
    char value[PROPERTY_VALUE_MAX];
    if (property_get("media.stagefright.disable-net", value, 0)
            && (!strcasecmp(value, "true") || !strcmp(value, "1"))) {
        LOG_PRI(ANDROID_LOG_INFO, LOG_TAG, "Simulating that the network is down.");
        disconnect_l();
        return ERROR_IO;
    }
#endif

    if (offset != mCurrentOffset) {
        AString tmp = mURI;
        KeyedVector<String8, String8> tmpHeaders = mHeaders;

        disconnect_l();

        status_t err = connect_l(tmp.c_str(), &tmpHeaders, offset);

        if (err != OK) {
            LCHLOGD1("err = %d", (int ) err);
            return err;
        }
    }

    mState = READING;

    int64_t startTimeUs = ALooper::GetNowUs();

    mDelegate->initiateRead(data, size);

    while (mState == READING) {
        mCondition.wait(mLock);
    }

    if (mIOResult < OK) {
        return mIOResult;
    }

    if (mState == CONNECTED) {
        int64_t delayUs = ALooper::GetNowUs() - startTimeUs;

        // The read operation was successful, mIOResult contains
        // the number of bytes read.
        addBandwidthMeasurement(mIOResult, delayUs);

        mCurrentOffset += mIOResult;
        return mIOResult;
    }

    return ERROR_IO;
}

void server_forward_kmsg(
        Server *s,
        int priority,
        const char *identifier,
        const char *message,
        const struct ucred *ucred) {

        _cleanup_free_ char *ident_buf = NULL;
        struct iovec iovec[5];
        char header_priority[DECIMAL_STR_MAX(priority) + 3],
             header_pid[STRLEN("[]: ") + DECIMAL_STR_MAX(pid_t) + 1];
        int n = 0;

        assert(s);
        assert(priority >= 0);
        assert(priority <= 999);
        assert(message);

        if (_unlikely_(LOG_PRI(priority) > s->max_level_kmsg))
                return;

        if (_unlikely_(s->dev_kmsg_fd < 0))
                return;

        /* Never allow messages with kernel facility to be written to
         * kmsg, regardless where the data comes from. */
        priority = syslog_fixup_facility(priority);

        /* First: priority field */
        xsprintf(header_priority, "<%i>", priority);
        iovec[n++] = IOVEC_MAKE_STRING(header_priority);

        /* Second: identifier and PID */
        if (ucred) {
                if (!identifier) {
                        get_process_comm(ucred->pid, &ident_buf);
                        identifier = ident_buf;
                }

                xsprintf(header_pid, "["PID_FMT"]: ", ucred->pid);

                if (identifier)
                        iovec[n++] = IOVEC_MAKE_STRING(identifier);

                iovec[n++] = IOVEC_MAKE_STRING(header_pid);
        } else if (identifier) {
                iovec[n++] = IOVEC_MAKE_STRING(identifier);
                iovec[n++] = IOVEC_MAKE_STRING(": ");
        }

        /* Fourth: message */
        iovec[n++] = IOVEC_MAKE_STRING(message);
        iovec[n++] = IOVEC_MAKE_STRING("\n");

        if (writev(s->dev_kmsg_fd, iovec, n) < 0)
                log_debug_errno(errno, "Failed to write to /dev/kmsg for logging: %m");
}