[thirdparty/squid.git] / src / log / ModDaemon.cc

/*
 * DEBUG: section 50    Log file handling
 * AUTHOR: Adrian Chadd <adrian@squid-cache.org>
 *
 * SQUID Web Proxy Cache          http://www.squid-cache.org/
 * ----------------------------------------------------------
 *
 *  Squid is the result of efforts by numerous individuals from
 *  the Internet community; see the CONTRIBUTORS file for full
 *  details.   Many organizations have provided support for Squid's
 *  development; see the SPONSORS file for full details.  Squid is
 *  Copyrighted (C) 2001 by the Regents of the University of
 *  California; see the COPYRIGHT file for full details.  Squid
 *  incorporates software developed and/or copyrighted by other
 *  sources; see the CREDITS file for full details.
 *
 *  This program 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 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program 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 this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
 *
 */

#include "squid.h"
#include "cbdata.h"
#include "fde.h"
#include "log/Config.h"
#include "log/File.h"
#include "log/ModDaemon.h"
#include "SquidTime.h"

/* How many buffers to keep before we say we've buffered too much */
#define	LOGFILE_MAXBUFS		128

/* Size of the logfile buffer */
/*
 * For optimal performance this should match LOGFILE_BUFSIZ in logfile-daemon.c
 */
#define	LOGFILE_BUFSZ		32768

/* How many seconds between warnings */
#define	LOGFILE_WARN_TIME	30

static LOGWRITE logfile_mod_daemon_writeline;
static LOGLINESTART logfile_mod_daemon_linestart;
static LOGLINEEND logfile_mod_daemon_lineend;
static LOGROTATE logfile_mod_daemon_rotate;
static LOGFLUSH logfile_mod_daemon_flush;
static LOGCLOSE logfile_mod_daemon_close;

static void logfile_mod_daemon_append(Logfile * lf, const char *buf, int len);

struct _l_daemon {
    int rfd, wfd;
    char eol;
    pid_t pid;
    int flush_pending;
    dlink_list bufs;
    int nbufs;
    int last_warned;
};

typedef struct _l_daemon l_daemon_t;

/* Internal code */
static void
logfileNewBuffer(Logfile * lf)
{
    l_daemon_t *ll = (l_daemon_t *) lf->data;
    logfile_buffer_t *b;

    debugs(50, 5, "logfileNewBuffer: " << lf->path << ": new buffer");

    b = static_cast<logfile_buffer_t*>(xcalloc(1, sizeof(logfile_buffer_t)));
    assert(b != NULL);
    b->buf = static_cast<char*>(xcalloc(1, LOGFILE_BUFSZ));
    assert(b->buf != NULL);
    b->size = LOGFILE_BUFSZ;
    b->written_len = 0;
    b->len = 0;
    dlinkAddTail(b, &b->node, &ll->bufs);
    ll->nbufs++;
}

static void
logfileFreeBuffer(Logfile * lf, logfile_buffer_t * b)
{
    l_daemon_t *ll = (l_daemon_t *) lf->data;
    assert(b != NULL);
    dlinkDelete(&b->node, &ll->bufs);
    ll->nbufs--;
    xfree(b->buf);
    xfree(b);
}

static void
logfileHandleWrite(int fd, void *data)
{
    Logfile *lf = (Logfile *) data;
    l_daemon_t *ll = (l_daemon_t *) lf->data;
    int ret;
    logfile_buffer_t *b;

    /*
     * We'll try writing the first entry until its done - if we
     * get a partial write then we'll re-schedule until its completed.
     * Its naive but it'll do for now.
     */
    b = static_cast<logfile_buffer_t*>(ll->bufs.head->data);
    assert(b != NULL);
    ll->flush_pending = 0;

    ret = FD_WRITE_METHOD(ll->wfd, b->buf + b->written_len, b->len - b->written_len);
    debugs(50, 3, "logfileHandleWrite: " << lf->path << ": write returned " << ret);
    if (ret < 0) {
        if (ignoreErrno(errno)) {
            /* something temporary */
            goto reschedule;
        }
        debugs(50, DBG_IMPORTANT,"logfileHandleWrite: " << lf->path << ": error writing (" << xstrerror() << ")");
        /* XXX should handle this better */
        fatal("I don't handle this error well!");
    }
    if (ret == 0) {
        /* error? */
        debugs(50, DBG_IMPORTANT, "logfileHandleWrite: " << lf->path << ": wrote 0 bytes?");
        /* XXX should handle this better */
        fatal("I don't handle this error well!");
    }
    /* ret > 0, so something was written */
    b->written_len += ret;
    assert(b->written_len <= b->len);
    if (b->written_len == b->len) {
        /* written the whole buffer! */
        logfileFreeBuffer(lf, b);
        b = NULL;
    }
    /* Is there more to write? */
    if (ll->bufs.head == NULL) {
        goto finish;
    }
    /* there is, so schedule more */

reschedule:
    commSetSelect(ll->wfd, COMM_SELECT_WRITE, logfileHandleWrite, lf, 0);
    ll->flush_pending = 1;
finish:
    return;
}

static void
logfileQueueWrite(Logfile * lf)
{
    l_daemon_t *ll = (l_daemon_t *) lf->data;
    if (ll->flush_pending || ll->bufs.head == NULL) {
        return;
    }
    ll->flush_pending = 1;
    if (ll->bufs.head) {
        logfile_buffer_t *b = static_cast<logfile_buffer_t*>(ll->bufs.head->data);
        if (b->len + 2 <= b->size)
            logfile_mod_daemon_append(lf, "F\n", 2);
    }
    /* Ok, schedule a write-event */
    commSetSelect(ll->wfd, COMM_SELECT_WRITE, logfileHandleWrite, lf, 0);
}

static void
logfile_mod_daemon_append(Logfile * lf, const char *buf, int len)
{
    l_daemon_t *ll = (l_daemon_t *) lf->data;
    logfile_buffer_t *b;
    int s;

    /* Is there a buffer? If not, create one */
    if (ll->bufs.head == NULL) {
        logfileNewBuffer(lf);
    }
    debugs(50, 3, "logfile_mod_daemon_append: " << lf->path << ": appending " << len << " bytes");
    /* Copy what can be copied */
    while (len > 0) {
        b = static_cast<logfile_buffer_t*>(ll->bufs.tail->data);
        debugs(50, 3, "logfile_mod_daemon_append: current buffer has " << b->len << " of " << b->size << " bytes before append");
        s = min(len, (b->size - b->len));
        memcpy(b->buf + b->len, buf, s);
        len = len - s;
        buf = buf + s;
        b->len = b->len + s;
        assert(b->len <= LOGFILE_BUFSZ);
        assert(len >= 0);
        if (len > 0) {
            logfileNewBuffer(lf);
        }
    }
}

/*
 * only schedule a flush (write) if one isn't scheduled.
 */
static void
logfileFlushEvent(void *data)
{
    Logfile *lf = static_cast<Logfile *>(data);

    /*
     * This might work better if we keep track of when we wrote last and only
     * schedule a write if we haven't done so in the last second or two.
     */
    logfileQueueWrite(lf);
    eventAdd("logfileFlush", logfileFlushEvent, lf, 1.0, 1);
}


/* External code */

int
logfile_mod_daemon_open(Logfile * lf, const char *path, size_t bufsz, int fatal_flag)
{
    const char *args[5];
    char *tmpbuf;
    l_daemon_t *ll;

    lf->f_close = logfile_mod_daemon_close;
    lf->f_linewrite = logfile_mod_daemon_writeline;
    lf->f_linestart = logfile_mod_daemon_linestart;
    lf->f_lineend = logfile_mod_daemon_lineend;
    lf->f_flush = logfile_mod_daemon_flush;
    lf->f_rotate = logfile_mod_daemon_rotate;

    cbdataInternalLock(lf); // WTF?
    debugs(50, 1, "Logfile Daemon: opening log " << path);
    ll = static_cast<l_daemon_t*>(xcalloc(1, sizeof(*ll)));
    lf->data = ll;
    ll->eol = 1;
    {
        Ip::Address localhost;
        args[0] = "(logfile-daemon)";
        args[1] = path;
        args[2] = NULL;
        localhost.SetLocalhost();
        ll->pid = ipcCreate(IPC_STREAM, Log::TheConfig.logfile_daemon, args, "logfile-daemon", localhost, &ll->rfd, &ll->wfd, NULL);
        if (ll->pid < 0)
            fatal("Couldn't start logfile helper");
    }
    ll->nbufs = 0;

    /* Queue the initial control data */
    tmpbuf = static_cast<char*>(xmalloc(BUFSIZ));
    snprintf(tmpbuf, BUFSIZ, "r%d\nb%d\n", Config.Log.rotateNumber, Config.onoff.buffered_logs);
    logfile_mod_daemon_append(lf, tmpbuf, strlen(tmpbuf));
    xfree(tmpbuf);

    /* Start the flush event */
    eventAdd("logfileFlush", logfileFlushEvent, lf, 1.0, 1);

    return 1;
}

static void
logfile_mod_daemon_close(Logfile * lf)
{
    l_daemon_t *ll = static_cast<l_daemon_t *>(lf->data);
    debugs(50, 1, "Logfile Daemon: closing log " << lf->path);
    logfileFlush(lf);
    if (ll->rfd == ll->wfd)
        comm_close(ll->rfd);
    else {
        comm_close(ll->rfd);
        comm_close(ll->wfd);
    }
    kill(ll->pid, SIGTERM);
    eventDelete(logfileFlushEvent, lf);
    xfree(ll);
    lf->data = NULL;
    cbdataInternalUnlock(lf); // WTF??
}

static void
logfile_mod_daemon_rotate(Logfile * lf)
{
    char tb[3];
    debugs(50, 1, "logfileRotate: " << lf->path);
    tb[0] = 'R';
    tb[1] = '\n';
    tb[2] = '\0';
    logfile_mod_daemon_append(lf, tb, 2);
}

/*
 * This routine assumes that up to one line is written. Don't try to
 * call this routine with more than one line or subsequent lines
 * won't be prefixed with the command type and confuse the logging
 * daemon somewhat.
 */
static void
logfile_mod_daemon_writeline(Logfile * lf, const char *buf, size_t len)
{
    l_daemon_t *ll = static_cast<l_daemon_t *>(lf->data);
    /* Make sure the logfile buffer isn't too large */
    if (ll->nbufs > LOGFILE_MAXBUFS) {
        if (ll->last_warned < squid_curtime - LOGFILE_WARN_TIME) {
            ll->last_warned = squid_curtime;
            debugs(50, DBG_IMPORTANT, "Logfile: " << lf->path << ": queue is too large; some log messages have been lost.");
        }
        return;
    }
    /* Append this data to the end buffer; create a new one if needed */
    /* Are we eol? If so, prefix with our logfile command byte */
    logfile_mod_daemon_append(lf, buf, len);
}

static void
logfile_mod_daemon_linestart(Logfile * lf)
{
    l_daemon_t *ll = static_cast<l_daemon_t *>(lf->data);
    char tb[2];
    assert(ll->eol == 1);
    ll->eol = 0;
    tb[0] = 'L';
    tb[1] = '\0';
    logfile_mod_daemon_append(lf, tb, 1);
}

static void
logfile_mod_daemon_lineend(Logfile * lf)
{
    l_daemon_t *ll = static_cast<l_daemon_t *>(lf->data);
    logfile_buffer_t *b;
    assert(ll->eol == 0);
    ll->eol = 1;
    /* Kick a write off if the head buffer is -full- */
    if (ll->bufs.head != NULL) {
        b = static_cast<logfile_buffer_t*>(ll->bufs.head->data);
        if (b->node.next != NULL || !Config.onoff.buffered_logs)
            logfileQueueWrite(lf);
    }
}

static void
logfile_mod_daemon_flush(Logfile * lf)
{
    l_daemon_t *ll = static_cast<l_daemon_t *>(lf->data);
    if (commUnsetNonBlocking(ll->wfd)) {
        debugs(50, DBG_IMPORTANT, "Logfile Daemon: Couldn't set the pipe blocking for flush! You're now missing some log entries.");
        return;
    }
    while (ll->bufs.head != NULL) {
        logfileHandleWrite(ll->wfd, lf);
    }
    if (commSetNonBlocking(ll->wfd)) {
        fatalf("Logfile Daemon: %s: Couldn't set the pipe non-blocking for flush!\n", lf->path);
        return;
    }
}
Commit	Line	Data
82b7abe3 AJ	1	/*
	2	* DEBUG: section 50 Log file handling
	3	* AUTHOR: Adrian Chadd <adrian@squid-cache.org>
	4	*
	5	* SQUID Web Proxy Cache http://www.squid-cache.org/
	6	* ----------------------------------------------------------
	7	*
	8	* Squid is the result of efforts by numerous individuals from
	9	* the Internet community; see the CONTRIBUTORS file for full
	10	* details. Many organizations have provided support for Squid's
	11	* development; see the SPONSORS file for full details. Squid is
	12	* Copyrighted (C) 2001 by the Regents of the University of
	13	* California; see the COPYRIGHT file for full details. Squid
	14	* incorporates software developed and/or copyrighted by other
	15	* sources; see the CREDITS file for full details.
	16	*
	17	* This program is free software; you can redistribute it and/or modify
	18	* it under the terms of the GNU General Public License as published by
	19	* the Free Software Foundation; either version 2 of the License, or
	20	* (at your option) any later version.
9d65168e	21	*
82b7abe3 AJ	22	* This program is distributed in the hope that it will be useful,
	23	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	24	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	25	* GNU General Public License for more details.
9d65168e	26	*
82b7abe3 AJ	27	* You should have received a copy of the GNU General Public License
	28	* along with this program; if not, write to the Free Software
	29	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
	30	*
	31	*/
	32
	33	#include "squid.h"
	34	#include "cbdata.h"
	35	#include "fde.h"
	36	#include "log/Config.h"
	37	#include "log/File.h"
	38	#include "log/ModDaemon.h"
	39	#include "SquidTime.h"
	40
	41	/* How many buffers to keep before we say we've buffered too much */
	42	#define LOGFILE_MAXBUFS 128
	43
	44	/* Size of the logfile buffer */
9d65168e	45	/*
82b7abe3 AJ	46	* For optimal performance this should match LOGFILE_BUFSIZ in logfile-daemon.c
	47	*/
	48	#define LOGFILE_BUFSZ 32768
	49
	50	/* How many seconds between warnings */
	51	#define LOGFILE_WARN_TIME 30
	52
	53	static LOGWRITE logfile_mod_daemon_writeline;
	54	static LOGLINESTART logfile_mod_daemon_linestart;
	55	static LOGLINEEND logfile_mod_daemon_lineend;
	56	static LOGROTATE logfile_mod_daemon_rotate;
	57	static LOGFLUSH logfile_mod_daemon_flush;
	58	static LOGCLOSE logfile_mod_daemon_close;
	59
	60	static void logfile_mod_daemon_append(Logfile * lf, const char *buf, int len);
	61
	62	struct _l_daemon {
	63	int rfd, wfd;
	64	char eol;
	65	pid_t pid;
	66	int flush_pending;
	67	dlink_list bufs;
	68	int nbufs;
	69	int last_warned;
	70	};
	71
	72	typedef struct _l_daemon l_daemon_t;
	73
	74	/* Internal code */
	75	static void
	76	logfileNewBuffer(Logfile * lf)
	77	{
	78	l_daemon_t ll = (l_daemon_t ) lf->data;
	79	logfile_buffer_t *b;
	80
	81	debugs(50, 5, "logfileNewBuffer: " << lf->path << ": new buffer");
	82
	83	b = static_cast<logfile_buffer_t*>(xcalloc(1, sizeof(logfile_buffer_t)));
	84	assert(b != NULL);
	85	b->buf = static_cast<char*>(xcalloc(1, LOGFILE_BUFSZ));
	86	assert(b->buf != NULL);
	87	b->size = LOGFILE_BUFSZ;
	88	b->written_len = 0;
	89	b->len = 0;
	90	dlinkAddTail(b, &b->node, &ll->bufs);
	91	ll->nbufs++;
	92	}
	93
	94	static void
	95	logfileFreeBuffer(Logfile * lf, logfile_buffer_t * b)
	96	{
	97	l_daemon_t ll = (l_daemon_t ) lf->data;
	98	assert(b != NULL);
	99	dlinkDelete(&b->node, &ll->bufs);
	100	ll->nbufs--;
	101	xfree(b->buf);
	102	xfree(b);
	103	}
	104
	105	static void
	106	logfileHandleWrite(int fd, void *data)
	107	{
	108	Logfile lf = (Logfile ) data;
	109	l_daemon_t ll = (l_daemon_t ) lf->data;
110	int ret;
111	logfile_buffer_t *b;
112
113	/*
114	* We'll try writing the first entry until its done - if we
115	* get a partial write then we'll re-schedule until its completed.
116	* Its naive but it'll do for now.
117	*/
118	b = static_cast<logfile_buffer_t*>(ll->bufs.head->data);
119	assert(b != NULL);
120	ll->flush_pending = 0;
121
122	ret = FD_WRITE_METHOD(ll->wfd, b->buf + b->written_len, b->len - b->written_len);
123	debugs(50, 3, "logfileHandleWrite: " << lf->path << ": write returned " << ret);
124	if (ret < 0) {
9d65168e A	125	if (ignoreErrno(errno)) {
	126	/* something temporary */
	127	goto reschedule;
	128	}
	129	debugs(50, DBG_IMPORTANT,"logfileHandleWrite: " << lf->path << ": error writing (" << xstrerror() << ")");
	130	/* XXX should handle this better */
	131	fatal("I don't handle this error well!");
82b7abe3 AJ	132	}
82b7abe3 AJ	133	if (ret == 0) {
9d65168e A	134	/* error? */
	135	debugs(50, DBG_IMPORTANT, "logfileHandleWrite: " << lf->path << ": wrote 0 bytes?");
	136	/* XXX should handle this better */
	137	fatal("I don't handle this error well!");
82b7abe3 AJ	138	}
	139	/* ret > 0, so something was written */
	140	b->written_len += ret;
	141	assert(b->written_len <= b->len);
	142	if (b->written_len == b->len) {
9d65168e A	143	/* written the whole buffer! */
	144	logfileFreeBuffer(lf, b);
	145	b = NULL;
82b7abe3 AJ	146	}
	147	/* Is there more to write? */
	148	if (ll->bufs.head == NULL) {
9d65168e	149	goto finish;
82b7abe3 AJ	150	}
	151	/* there is, so schedule more */
	152
9d65168e	153	reschedule:
82b7abe3 AJ	154	commSetSelect(ll->wfd, COMM_SELECT_WRITE, logfileHandleWrite, lf, 0);
82b7abe3 AJ	155	ll->flush_pending = 1;
9d65168e	156	finish:
82b7abe3 AJ	157	return;
	158	}
	159
	160	static void
	161	logfileQueueWrite(Logfile * lf)
	162	{
	163	l_daemon_t ll = (l_daemon_t ) lf->data;
	164	if (ll->flush_pending \|\| ll->bufs.head == NULL) {
9d65168e	165	return;
82b7abe3 AJ	166	}
	167	ll->flush_pending = 1;
	168	if (ll->bufs.head) {
9d65168e A	169	logfile_buffer_t b = static_cast<logfile_buffer_t>(ll->bufs.head->data);
	170	if (b->len + 2 <= b->size)
	171	logfile_mod_daemon_append(lf, "F\n", 2);
82b7abe3 AJ	172	}
	173	/* Ok, schedule a write-event */
	174	commSetSelect(ll->wfd, COMM_SELECT_WRITE, logfileHandleWrite, lf, 0);
	175	}
	176
	177	static void
	178	logfile_mod_daemon_append(Logfile * lf, const char *buf, int len)
	179	{
	180	l_daemon_t ll = (l_daemon_t ) lf->data;
	181	logfile_buffer_t *b;
	182	int s;
	183
	184	/* Is there a buffer? If not, create one */
	185	if (ll->bufs.head == NULL) {
9d65168e	186	logfileNewBuffer(lf);
82b7abe3 AJ	187	}
	188	debugs(50, 3, "logfile_mod_daemon_append: " << lf->path << ": appending " << len << " bytes");
	189	/* Copy what can be copied */
	190	while (len > 0) {
9d65168e A	191	b = static_cast<logfile_buffer_t*>(ll->bufs.tail->data);
	192	debugs(50, 3, "logfile_mod_daemon_append: current buffer has " << b->len << " of " << b->size << " bytes before append");
	193	s = min(len, (b->size - b->len));
41d00cd3	194	memcpy(b->buf + b->len, buf, s);
9d65168e A	195	len = len - s;
	196	buf = buf + s;
	197	b->len = b->len + s;
	198	assert(b->len <= LOGFILE_BUFSZ);
	199	assert(len >= 0);
	200	if (len > 0) {
	201	logfileNewBuffer(lf);
	202	}
82b7abe3 AJ	203	}
	204	}
	205
	206	/*
	207	* only schedule a flush (write) if one isn't scheduled.
	208	*/
	209	static void
	210	logfileFlushEvent(void *data)
	211	{
	212	Logfile lf = static_cast<Logfile >(data);
	213
	214	/*
	215	* This might work better if we keep track of when we wrote last and only
	216	* schedule a write if we haven't done so in the last second or two.
	217	*/
	218	logfileQueueWrite(lf);
	219	eventAdd("logfileFlush", logfileFlushEvent, lf, 1.0, 1);
	220	}
	221
	222
	223	/* External code */
	224
	225	int
	226	logfile_mod_daemon_open(Logfile * lf, const char *path, size_t bufsz, int fatal_flag)
	227	{
	228	const char *args[5];
	229	char *tmpbuf;
	230	l_daemon_t *ll;
	231
	232	lf->f_close = logfile_mod_daemon_close;
	233	lf->f_linewrite = logfile_mod_daemon_writeline;
	234	lf->f_linestart = logfile_mod_daemon_linestart;
	235	lf->f_lineend = logfile_mod_daemon_lineend;
	236	lf->f_flush = logfile_mod_daemon_flush;
	237	lf->f_rotate = logfile_mod_daemon_rotate;
	238
	239	cbdataInternalLock(lf); // WTF?
	240	debugs(50, 1, "Logfile Daemon: opening log " << path);
	241	ll = static_cast<l_daemon_t>(xcalloc(1, sizeof(ll)));
	242	lf->data = ll;
	243	ll->eol = 1;
	244	{
b7ac5457	245	Ip::Address localhost;
9d65168e A	246	args[0] = "(logfile-daemon)";
	247	args[1] = path;
	248	args[2] = NULL;
82b7abe3	249	localhost.SetLocalhost();
9d65168e A	250	ll->pid = ipcCreate(IPC_STREAM, Log::TheConfig.logfile_daemon, args, "logfile-daemon", localhost, &ll->rfd, &ll->wfd, NULL);
	251	if (ll->pid < 0)
	252	fatal("Couldn't start logfile helper");
82b7abe3 AJ	253	}
	254	ll->nbufs = 0;
	255
	256	/* Queue the initial control data */
	257	tmpbuf = static_cast<char*>(xmalloc(BUFSIZ));
	258	snprintf(tmpbuf, BUFSIZ, "r%d\nb%d\n", Config.Log.rotateNumber, Config.onoff.buffered_logs);
	259	logfile_mod_daemon_append(lf, tmpbuf, strlen(tmpbuf));
	260	xfree(tmpbuf);
	261
	262	/* Start the flush event */
	263	eventAdd("logfileFlush", logfileFlushEvent, lf, 1.0, 1);
	264
	265	return 1;
	266	}
	267
	268	static void
	269	logfile_mod_daemon_close(Logfile * lf)
	270	{
	271	l_daemon_t ll = static_cast<l_daemon_t >(lf->data);
	272	debugs(50, 1, "Logfile Daemon: closing log " << lf->path);
	273	logfileFlush(lf);
	274	if (ll->rfd == ll->wfd)
9d65168e	275	comm_close(ll->rfd);
82b7abe3 AJ	276	else {
	277	comm_close(ll->rfd);
	278	comm_close(ll->wfd);
	279	}
	280	kill(ll->pid, SIGTERM);
	281	eventDelete(logfileFlushEvent, lf);
	282	xfree(ll);
	283	lf->data = NULL;
	284	cbdataInternalUnlock(lf); // WTF??
	285	}
	286
	287	static void
	288	logfile_mod_daemon_rotate(Logfile * lf)
	289	{
	290	char tb[3];
	291	debugs(50, 1, "logfileRotate: " << lf->path);
	292	tb[0] = 'R';
	293	tb[1] = '\n';
	294	tb[2] = '\0';
	295	logfile_mod_daemon_append(lf, tb, 2);
	296	}
	297
	298	/*
	299	* This routine assumes that up to one line is written. Don't try to
	300	* call this routine with more than one line or subsequent lines
	301	* won't be prefixed with the command type and confuse the logging
	302	* daemon somewhat.
	303	*/
	304	static void
	305	logfile_mod_daemon_writeline(Logfile * lf, const char *buf, size_t len)
	306	{
	307	l_daemon_t ll = static_cast<l_daemon_t >(lf->data);
	308	/* Make sure the logfile buffer isn't too large */
	309	if (ll->nbufs > LOGFILE_MAXBUFS) {
9d65168e A	310	if (ll->last_warned < squid_curtime - LOGFILE_WARN_TIME) {
	311	ll->last_warned = squid_curtime;
	312	debugs(50, DBG_IMPORTANT, "Logfile: " << lf->path << ": queue is too large; some log messages have been lost.");
	313	}
	314	return;
82b7abe3 AJ	315	}
	316	/* Append this data to the end buffer; create a new one if needed */
	317	/* Are we eol? If so, prefix with our logfile command byte */
	318	logfile_mod_daemon_append(lf, buf, len);
	319	}
	320
	321	static void
	322	logfile_mod_daemon_linestart(Logfile * lf)
	323	{
	324	l_daemon_t ll = static_cast<l_daemon_t >(lf->data);
	325	char tb[2];
	326	assert(ll->eol == 1);
	327	ll->eol = 0;
	328	tb[0] = 'L';
	329	tb[1] = '\0';
	330	logfile_mod_daemon_append(lf, tb, 1);
	331	}
	332
	333	static void
	334	logfile_mod_daemon_lineend(Logfile * lf)
	335	{
	336	l_daemon_t ll = static_cast<l_daemon_t >(lf->data);
	337	logfile_buffer_t *b;
	338	assert(ll->eol == 0);
	339	ll->eol = 1;
	340	/* Kick a write off if the head buffer is -full- */
	341	if (ll->bufs.head != NULL) {
9d65168e A	342	b = static_cast<logfile_buffer_t*>(ll->bufs.head->data);
	343	if (b->node.next != NULL \|\| !Config.onoff.buffered_logs)
	344	logfileQueueWrite(lf);
82b7abe3 AJ	345	}
	346	}
	347
	348	static void
	349	logfile_mod_daemon_flush(Logfile * lf)
	350	{
	351	l_daemon_t ll = static_cast<l_daemon_t >(lf->data);
	352	if (commUnsetNonBlocking(ll->wfd)) {
9d65168e A	353	debugs(50, DBG_IMPORTANT, "Logfile Daemon: Couldn't set the pipe blocking for flush! You're now missing some log entries.");
9d65168e A	354	return;
82b7abe3 AJ	355	}
82b7abe3 AJ	356	while (ll->bufs.head != NULL) {
9d65168e	357	logfileHandleWrite(ll->wfd, lf);
82b7abe3 AJ	358	}
82b7abe3 AJ	359	if (commSetNonBlocking(ll->wfd)) {
9d65168e A	360	fatalf("Logfile Daemon: %s: Couldn't set the pipe non-blocking for flush!\n", lf->path);
9d65168e A	361	return;
82b7abe3 AJ	362	}
82b7abe3 AJ	363	}