[u/mdw/putty] / logging.c

/*
 * Session logging.
 */

#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>

#include <time.h>
#include <assert.h>

#include "putty.h"

/* log session to file stuff ... */
struct LogContext {
    FILE *lgfp;
    enum { L_CLOSED, L_OPENING, L_OPEN, L_ERROR } state;
    bufchain queue;
    Filename currlogfilename;
    void *frontend;
    Config cfg;
};

static void xlatlognam(Filename *d, Filename s, char *hostname, struct tm *tm);

/*
 * Internal wrapper function which must be called for _all_ output
 * to the log file. It takes care of opening the log file if it
 * isn't open, buffering data if it's in the process of being
 * opened asynchronously, etc.
 */
static void logwrite(struct LogContext *ctx, void *data, int len)
{
    /*
     * In state L_CLOSED, we call logfopen, which will set the state
     * to one of L_OPENING, L_OPEN or L_ERROR. Hence we process all of
     * those three _after_ processing L_CLOSED.
     */
    if (ctx->state == L_CLOSED)
	logfopen(ctx);

    if (ctx->state == L_OPENING) {
	bufchain_add(&ctx->queue, data, len);
    } else if (ctx->state == L_OPEN) {
	assert(ctx->lgfp);
	fwrite(data, 1, len, ctx->lgfp);
    }				       /* else L_ERROR, so ignore the write */
}

/*
 * Convenience wrapper on logwrite() which printf-formats the
 * string.
 */
static void logprintf(struct LogContext *ctx, const char *fmt, ...)
{
    va_list ap;
    char *data;

    va_start(ap, fmt);
    data = dupvprintf(fmt, ap);
    va_end(ap);

    logwrite(ctx, data, strlen(data));
    sfree(data);
}

/*
 * Flush any open log file.
 */
void logflush(void *handle) {
    struct LogContext *ctx = (struct LogContext *)handle;
    if (ctx->cfg.logtype > 0)
	if (ctx->state == L_OPEN)
	    fflush(ctx->lgfp);
}

static void logfopen_callback(void *handle, int mode)
{
    struct LogContext *ctx = (struct LogContext *)handle;
    char buf[256], *event;
    struct tm tm;
    const char *fmode;

    if (mode == 0) {
	ctx->state = L_ERROR;	       /* disable logging */
    } else {
	fmode = (mode == 1 ? "ab" : "wb");
	ctx->lgfp = f_open(ctx->currlogfilename, fmode);
	if (ctx->lgfp)
	    ctx->state = L_OPEN;
	else
	    ctx->state = L_ERROR;
    }

    if (ctx->state == L_OPEN) {
	/* Write header line into log file. */
	tm = ltime();
	strftime(buf, 24, "%Y.%m.%d %H:%M:%S", &tm);
	logprintf(ctx, "=~=~=~=~=~=~=~=~=~=~=~= PuTTY log %s"
		  " =~=~=~=~=~=~=~=~=~=~=~=\r\n", buf);
    }

    event = dupprintf("%s session log (%s mode) to file: %s",
		      (mode == 0 ? "Disabled writing" :
                       mode == 1 ? "Appending" : "Writing new"),
		      (ctx->cfg.logtype == LGTYP_ASCII ? "ASCII" :
		       ctx->cfg.logtype == LGTYP_DEBUG ? "raw" :
		       ctx->cfg.logtype == LGTYP_PACKETS ? "SSH packets" :
		       "unknown"),
		      filename_to_str(&ctx->currlogfilename));
    logevent(ctx->frontend, event);
    sfree(event);

    /*
     * Having either succeeded or failed in opening the log file,
     * we should write any queued data out.
     */
    assert(ctx->state != L_OPENING);   /* make _sure_ it won't be requeued */
    while (bufchain_size(&ctx->queue)) {
	void *data;
	int len;
	bufchain_prefix(&ctx->queue, &data, &len);
	logwrite(ctx, data, len);
	bufchain_consume(&ctx->queue, len);
    }
}

/*
 * Open the log file. Takes care of detecting an already-existing
 * file and asking the user whether they want to append, overwrite
 * or cancel logging.
 */
void logfopen(void *handle)
{
    struct LogContext *ctx = (struct LogContext *)handle;
    struct tm tm;
    int mode;

    /* Prevent repeat calls */
    if (ctx->state != L_CLOSED)
	return;

    if (!ctx->cfg.logtype)
	return;

    tm = ltime();

    /* substitute special codes in file name */
    xlatlognam(&ctx->currlogfilename, ctx->cfg.logfilename,ctx->cfg.host, &tm);

    ctx->lgfp = f_open(ctx->currlogfilename, "r");  /* file already present? */
    if (ctx->lgfp) {
	fclose(ctx->lgfp);
	if (ctx->cfg.logxfovr != LGXF_ASK) {
	    mode = ((ctx->cfg.logxfovr == LGXF_OVR) ? 2 : 1);
	} else
	    mode = askappend(ctx->frontend, ctx->currlogfilename,
			     logfopen_callback, ctx);
    } else
	mode = 2;		       /* create == overwrite */

    if (mode < 0)
	ctx->state = L_OPENING;
    else
	logfopen_callback(ctx, mode);  /* open the file */
}

void logfclose(void *handle)
{
    struct LogContext *ctx = (struct LogContext *)handle;
    if (ctx->lgfp) {
	fclose(ctx->lgfp);
	ctx->lgfp = NULL;
    }
    ctx->state = L_CLOSED;
}

/*
 * Log session traffic.
 */
void logtraffic(void *handle, unsigned char c, int logmode)
{
    struct LogContext *ctx = (struct LogContext *)handle;
    if (ctx->cfg.logtype > 0) {
	if (ctx->cfg.logtype == logmode)
	    logwrite(ctx, &c, 1);
    }
}

/*
 * Log an Event Log entry. Used in SSH packet logging mode; this is
 * also as convenient a place as any to put the output of Event Log
 * entries to stderr when a command-line tool is in verbose mode.
 * (In particular, this is a better place to put it than in the
 * front ends, because it only has to be done once for all
 * platforms. Platforms which don't have a meaningful stderr can
 * just avoid defining FLAG_STDERR.
 */
void log_eventlog(void *handle, const char *event)
{
    struct LogContext *ctx = (struct LogContext *)handle;
    if ((flags & FLAG_STDERR) && (flags & FLAG_VERBOSE)) {
	fprintf(stderr, "%s\n", event);
	fflush(stderr);
    }
    if (ctx->cfg.logtype != LGTYP_PACKETS)
	return;
    logprintf(ctx, "Event Log: %s\r\n", event);
}

/*
 * Log an SSH packet.
 * If n_blanks != 0, blank or omit some parts.
 * Set of blanking areas must be in increasing order.
 */
void log_packet(void *handle, int direction, int type,
		char *texttype, void *data, int len,
		int n_blanks, const struct logblank_t *blanks)
{
    struct LogContext *ctx = (struct LogContext *)handle;
    char dumpdata[80], smalldata[5];
    int p = 0, b = 0, omitted = 0;
    int output_pos = 0; /* NZ if pending output in dumpdata */

    if (ctx->cfg.logtype != LGTYP_PACKETS)
	return;

    /* Packet header. */
    logprintf(ctx, "%s packet type %d / 0x%02x (%s)\r\n",
	      direction == PKT_INCOMING ? "Incoming" : "Outgoing",
	      type, type, texttype);

    /*
     * Output a hex/ASCII dump of the packet body, blanking/omitting
     * parts as specified.
     */
    while (p < len) {
	int blktype;

	/* Move to a current entry in the blanking array. */
	while ((b < n_blanks) &&
	       (p >= blanks[b].offset + blanks[b].len))
	    b++;
	/* Work out what type of blanking to apply to
	 * this byte. */
	blktype = PKTLOG_EMIT; /* default */
	if ((b < n_blanks) &&
	    (p >= blanks[b].offset) &&
	    (p < blanks[b].offset + blanks[b].len))
	    blktype = blanks[b].type;

	/* If we're about to stop omitting, it's time to say how
	 * much we omitted. */
	if ((blktype != PKTLOG_OMIT) && omitted) {
	    logprintf(ctx, "  (%d byte%s omitted)\r\n",
		      omitted, (omitted==1?"":"s"));
	    omitted = 0;
	}

	/* (Re-)initialise dumpdata as necessary
	 * (start of row, or if we've just stopped omitting) */
	if (!output_pos && !omitted)
	    sprintf(dumpdata, "  %08x%*s\r\n", p-(p%16), 1+3*16+2+16, "");

	/* Deal with the current byte. */
	if (blktype == PKTLOG_OMIT) {
	    omitted++;
	} else {
	    int c;
	    if (blktype == PKTLOG_BLANK) {
		c = 'X';
		sprintf(smalldata, "XX");
	    } else {  /* PKTLOG_EMIT */
		c = ((unsigned char *)data)[p];
		sprintf(smalldata, "%02x", c);
	    }
	    dumpdata[10+2+3*(p%16)] = smalldata[0];
	    dumpdata[10+2+3*(p%16)+1] = smalldata[1];
	    dumpdata[10+1+3*16+2+(p%16)] = (isprint(c) ? c : '.');
	    output_pos = (p%16) + 1;
	}

	p++;

	/* Flush row if necessary */
	if (((p % 16) == 0) || (p == len) || omitted) {
	    if (output_pos) {
		strcpy(dumpdata + 10+1+3*16+2+output_pos, "\r\n");
		logwrite(ctx, dumpdata, strlen(dumpdata));
		output_pos = 0;
	    }
	}

    }

    /* Tidy up */
    if (omitted)
	logprintf(ctx, "  (%d byte%s omitted)\r\n",
		  omitted, (omitted==1?"":"s"));
    logflush(ctx);
}

void *log_init(void *frontend, Config *cfg)
{
    struct LogContext *ctx = snew(struct LogContext);
    ctx->lgfp = NULL;
    ctx->state = L_CLOSED;
    ctx->frontend = frontend;
    ctx->cfg = *cfg;		       /* STRUCTURE COPY */
    bufchain_init(&ctx->queue);
    return ctx;
}

void log_free(void *handle)
{
    struct LogContext *ctx = (struct LogContext *)handle;

    logfclose(ctx);
    bufchain_clear(&ctx->queue);
    sfree(ctx);
}

void log_reconfig(void *handle, Config *cfg)
{
    struct LogContext *ctx = (struct LogContext *)handle;
    int reset_logging;

    if (!filename_equal(ctx->cfg.logfilename, cfg->logfilename) ||
	ctx->cfg.logtype != cfg->logtype)
	reset_logging = TRUE;
    else
	reset_logging = FALSE;

    if (reset_logging)
	logfclose(ctx);

    ctx->cfg = *cfg;		       /* STRUCTURE COPY */

    if (reset_logging)
	logfopen(ctx);
}

/*
 * translate format codes into time/date strings
 * and insert them into log file name
 *
 * "&Y":YYYY   "&m":MM   "&d":DD   "&T":hhmm   "&h":<hostname>   "&&":&
 */
static void xlatlognam(Filename *dest, Filename src,
		       char *hostname, struct tm *tm) {
    char buf[10], *bufp;
    int size;
    char buffer[FILENAME_MAX];
    int len = sizeof(buffer)-1;
    char *d;
    const char *s;

    d = buffer;
    s = filename_to_str(&src);

    while (*s) {
	/* Let (bufp, len) be the string to append. */
	bufp = buf;		       /* don't usually override this */
	if (*s == '&') {
	    char c;
	    s++;
	    size = 0;
	    if (*s) switch (c = *s++, tolower(c)) {
	      case 'y':
		size = strftime(buf, sizeof(buf), "%Y", tm);
		break;
	      case 'm':
		size = strftime(buf, sizeof(buf), "%m", tm);
		break;
	      case 'd':
		size = strftime(buf, sizeof(buf), "%d", tm);
		break;
	      case 't':
		size = strftime(buf, sizeof(buf), "%H%M%S", tm);
		break;
	      case 'h':
		bufp = hostname;
		size = strlen(bufp);
		break;
	      default:
		buf[0] = '&';
		size = 1;
		if (c != '&')
		    buf[size++] = c;
	    }
	} else {
	    buf[0] = *s++;
	    size = 1;
	}
	if (size > len)
	    size = len;
	memcpy(d, bufp, size);
	d += size;
	len -= size;
    }
    *d = '\0';

    *dest = filename_from_str(buffer);
}
Commit	Line	Data
eaf1e20a	1	/*
	2	* Session logging.
	3	*/
	4
00db133f	5	#include <stdio.h>
	6	#include <stdlib.h>
	7	#include <ctype.h>
	8
	9	#include <time.h>
	10	#include <assert.h>
	11
	12	#include "putty.h"
	13
	14	/* log session to file stuff ... */
a8327734	15	struct LogContext {
a8327734	16	FILE *lgfp;
8b029099	17	enum { L_CLOSED, L_OPENING, L_OPEN, L_ERROR } state;
919baedb	18	bufchain queue;
9a30e26b	19	Filename currlogfilename;
a8327734	20	void *frontend;
c229ef97	21	Config cfg;
a8327734	22	};
00db133f	23
9a30e26b	24	static void xlatlognam(Filename d, Filename s, char hostname, struct tm *tm);
00db133f	25
00db133f	26	/*
919baedb	27	* Internal wrapper function which must be called for _all_ output
	28	* to the log file. It takes care of opening the log file if it
	29	* isn't open, buffering data if it's in the process of being
	30	* opened asynchronously, etc.
00db133f	31	*/
919baedb	32	static void logwrite(struct LogContext ctx, void data, int len)
00db133f	33	{
919baedb	34	/*
8b029099	35	* In state L_CLOSED, we call logfopen, which will set the state
	36	* to one of L_OPENING, L_OPEN or L_ERROR. Hence we process all of
	37	* those three _after_ processing L_CLOSED.
919baedb	38	*/
8b029099	39	if (ctx->state == L_CLOSED)
919baedb	40	logfopen(ctx);
919baedb	41
8b029099	42	if (ctx->state == L_OPENING) {
919baedb	43	bufchain_add(&ctx->queue, data, len);
8b029099	44	} else if (ctx->state == L_OPEN) {
919baedb	45	assert(ctx->lgfp);
919baedb	46	fwrite(data, 1, len, ctx->lgfp);
8b029099	47	} /* else L_ERROR, so ignore the write */
919baedb	48	}
	49
	50	/*
	51	* Convenience wrapper on logwrite() which printf-formats the
	52	* string.
	53	*/
	54	static void logprintf(struct LogContext ctx, const char fmt, ...)
	55	{
	56	va_list ap;
	57	char *data;
	58
	59	va_start(ap, fmt);
	60	data = dupvprintf(fmt, ap);
	61	va_end(ap);
	62
	63	logwrite(ctx, data, strlen(data));
	64	sfree(data);
00db133f	65	}
	66
	67	/*
11cc5e30	68	* Flush any open log file.
	69	*/
	70	void logflush(void *handle) {
	71	struct LogContext ctx = (struct LogContext )handle;
	72	if (ctx->cfg.logtype > 0)
8b029099	73	if (ctx->state == L_OPEN)
11cc5e30	74	fflush(ctx->lgfp);
	75	}
	76
919baedb	77	static void logfopen_callback(void *handle, int mode)
	78	{
	79	struct LogContext ctx = (struct LogContext )handle;
	80	char buf[256], *event;
	81	struct tm tm;
	82	const char *fmode;
	83
	84	if (mode == 0) {
8b029099	85	ctx->state = L_ERROR; /* disable logging */
919baedb	86	} else {
9cd439a3	87	fmode = (mode == 1 ? "ab" : "wb");
919baedb	88	ctx->lgfp = f_open(ctx->currlogfilename, fmode);
919baedb	89	if (ctx->lgfp)
8b029099	90	ctx->state = L_OPEN;
919baedb	91	else
8b029099	92	ctx->state = L_ERROR;
919baedb	93	}
919baedb	94
8b029099	95	if (ctx->state == L_OPEN) {
919baedb	96	/* Write header line into log file. */
	97	tm = ltime();
	98	strftime(buf, 24, "%Y.%m.%d %H:%M:%S", &tm);
	99	logprintf(ctx, "=~=~=~=~=~=~=~=~=~=~=~= PuTTY log %s"
	100	" =~=~=~=~=~=~=~=~=~=~=~=\r\n", buf);
	101	}
	102
	103	event = dupprintf("%s session log (%s mode) to file: %s",
	104	(mode == 0 ? "Disabled writing" :
	105	mode == 1 ? "Appending" : "Writing new"),
	106	(ctx->cfg.logtype == LGTYP_ASCII ? "ASCII" :
	107	ctx->cfg.logtype == LGTYP_DEBUG ? "raw" :
	108	ctx->cfg.logtype == LGTYP_PACKETS ? "SSH packets" :
	109	"unknown"),
	110	filename_to_str(&ctx->currlogfilename));
	111	logevent(ctx->frontend, event);
	112	sfree(event);
	113
	114	/*
	115	* Having either succeeded or failed in opening the log file,
	116	* we should write any queued data out.
	117	*/
8b029099	118	assert(ctx->state != L_OPENING); /* make _sure_ it won't be requeued */
919baedb	119	while (bufchain_size(&ctx->queue)) {
	120	void *data;
	121	int len;
	122	bufchain_prefix(&ctx->queue, &data, &len);
	123	logwrite(ctx, data, len);
	124	bufchain_consume(&ctx->queue, len);
	125	}
	126	}
	127
	128	/*
	129	* Open the log file. Takes care of detecting an already-existing
	130	* file and asking the user whether they want to append, overwrite
	131	* or cancel logging.
	132	*/
	133	void logfopen(void *handle)
	134	{
	135	struct LogContext ctx = (struct LogContext )handle;
	136	struct tm tm;
	137	int mode;
	138
	139	/* Prevent repeat calls */
8b029099	140	if (ctx->state != L_CLOSED)
919baedb	141	return;
	142
	143	if (!ctx->cfg.logtype)
	144	return;
	145
	146	tm = ltime();
	147
	148	/* substitute special codes in file name */
	149	xlatlognam(&ctx->currlogfilename, ctx->cfg.logfilename,ctx->cfg.host, &tm);
	150
	151	ctx->lgfp = f_open(ctx->currlogfilename, "r"); /* file already present? */
	152	if (ctx->lgfp) {
	153	fclose(ctx->lgfp);
	154	if (ctx->cfg.logxfovr != LGXF_ASK) {
	155	mode = ((ctx->cfg.logxfovr == LGXF_OVR) ? 2 : 1);
	156	} else
	157	mode = askappend(ctx->frontend, ctx->currlogfilename,
	158	logfopen_callback, ctx);
	159	} else
	160	mode = 2; /* create == overwrite */
	161
	162	if (mode < 0)
8b029099	163	ctx->state = L_OPENING;
919baedb	164	else
	165	logfopen_callback(ctx, mode); /* open the file */
	166	}
	167
	168	void logfclose(void *handle)
	169	{
	170	struct LogContext ctx = (struct LogContext )handle;
	171	if (ctx->lgfp) {
	172	fclose(ctx->lgfp);
	173	ctx->lgfp = NULL;
	174	}
8b029099	175	ctx->state = L_CLOSED;
919baedb	176	}
	177
	178	/*
	179	* Log session traffic.
	180	*/
	181	void logtraffic(void *handle, unsigned char c, int logmode)
	182	{
	183	struct LogContext ctx = (struct LogContext )handle;
	184	if (ctx->cfg.logtype > 0) {
	185	if (ctx->cfg.logtype == logmode)
	186	logwrite(ctx, &c, 1);
	187	}
	188	}
	189
11cc5e30	190	/*
382908ad	191	* Log an Event Log entry. Used in SSH packet logging mode; this is
	192	* also as convenient a place as any to put the output of Event Log
	193	* entries to stderr when a command-line tool is in verbose mode.
	194	* (In particular, this is a better place to put it than in the
	195	* front ends, because it only has to be done once for all
	196	* platforms. Platforms which don't have a meaningful stderr can
	197	* just avoid defining FLAG_STDERR.
fb89f7ff	198	*/
cbe2d68f	199	void log_eventlog(void handle, const char event)
fb89f7ff	200	{
a8327734	201	struct LogContext ctx = (struct LogContext )handle;
382908ad	202	if ((flags & FLAG_STDERR) && (flags & FLAG_VERBOSE)) {
	203	fprintf(stderr, "%s\n", event);
	204	fflush(stderr);
	205	}
c229ef97	206	if (ctx->cfg.logtype != LGTYP_PACKETS)
fb89f7ff	207	return;
919baedb	208	logprintf(ctx, "Event Log: %s\r\n", event);
fb89f7ff	209	}
	210
	211	/*
00db133f	212	* Log an SSH packet.
9a10ecf4	213	* If n_blanks != 0, blank or omit some parts.
9a10ecf4	214	* Set of blanking areas must be in increasing order.
00db133f	215	*/
a8327734	216	void log_packet(void *handle, int direction, int type,
9a10ecf4	217	char texttype, void data, int len,
9a10ecf4	218	int n_blanks, const struct logblank_t *blanks)
00db133f	219	{
a8327734	220	struct LogContext ctx = (struct LogContext )handle;
00db133f	221	char dumpdata[80], smalldata[5];
919baedb	222	int p = 0, b = 0, omitted = 0;
919baedb	223	int output_pos = 0; /* NZ if pending output in dumpdata */
00db133f	224
c229ef97	225	if (ctx->cfg.logtype != LGTYP_PACKETS)
00db133f	226	return;
9a10ecf4	227
919baedb	228	/* Packet header. */
	229	logprintf(ctx, "%s packet type %d / 0x%02x (%s)\r\n",
	230	direction == PKT_INCOMING ? "Incoming" : "Outgoing",
	231	type, type, texttype);
	232
	233	/*
	234	* Output a hex/ASCII dump of the packet body, blanking/omitting
	235	* parts as specified.
	236	*/
	237	while (p < len) {
	238	int blktype;
	239
	240	/* Move to a current entry in the blanking array. */
	241	while ((b < n_blanks) &&
	242	(p >= blanks[b].offset + blanks[b].len))
	243	b++;
	244	/* Work out what type of blanking to apply to
	245	* this byte. */
	246	blktype = PKTLOG_EMIT; /* default */
	247	if ((b < n_blanks) &&
	248	(p >= blanks[b].offset) &&
	249	(p < blanks[b].offset + blanks[b].len))
	250	blktype = blanks[b].type;
	251
	252	/* If we're about to stop omitting, it's time to say how
	253	* much we omitted. */
	254	if ((blktype != PKTLOG_OMIT) && omitted) {
	255	logprintf(ctx, " (%d byte%s omitted)\r\n",
	256	omitted, (omitted==1?"":"s"));
	257	omitted = 0;
	258	}
9a10ecf4	259
919baedb	260	/* (Re-)initialise dumpdata as necessary
	261	* (start of row, or if we've just stopped omitting) */
	262	if (!output_pos && !omitted)
	263	sprintf(dumpdata, " %08x%s\r\n", p-(p%16), 1+316+2+16, "");
	264
	265	/* Deal with the current byte. */
	266	if (blktype == PKTLOG_OMIT) {
	267	omitted++;
	268	} else {
	269	int c;
	270	if (blktype == PKTLOG_BLANK) {
	271	c = 'X';
	272	sprintf(smalldata, "XX");
	273	} else { /* PKTLOG_EMIT */
	274	c = ((unsigned char *)data)[p];
	275	sprintf(smalldata, "%02x", c);
00db133f	276	}
919baedb	277	dumpdata[10+2+3*(p%16)] = smalldata[0];
	278	dumpdata[10+2+3*(p%16)+1] = smalldata[1];
	279	dumpdata[10+1+3*16+2+(p%16)] = (isprint(c) ? c : '.');
	280	output_pos = (p%16) + 1;
00db133f	281	}
9a10ecf4	282
919baedb	283	p++;
00db133f	284
919baedb	285	/* Flush row if necessary */
	286	if (((p % 16) == 0) \|\| (p == len) \|\| omitted) {
	287	if (output_pos) {
	288	strcpy(dumpdata + 10+1+3*16+2+output_pos, "\r\n");
	289	logwrite(ctx, dumpdata, strlen(dumpdata));
	290	output_pos = 0;
	291	}
00db133f	292	}
00db133f	293
00db133f	294	}
00db133f	295
919baedb	296	/* Tidy up */
	297	if (omitted)
	298	logprintf(ctx, " (%d byte%s omitted)\r\n",
	299	omitted, (omitted==1?"":"s"));
	300	logflush(ctx);
00db133f	301	}
00db133f	302
c229ef97	303	void log_init(void frontend, Config *cfg)
a8327734	304	{
3d88e64d	305	struct LogContext *ctx = snew(struct LogContext);
a8327734	306	ctx->lgfp = NULL;
8b029099	307	ctx->state = L_CLOSED;
a8327734	308	ctx->frontend = frontend;
c229ef97	309	ctx->cfg = cfg; / STRUCTURE COPY */
919baedb	310	bufchain_init(&ctx->queue);
a8327734	311	return ctx;
	312	}
	313
fabd1805	314	void log_free(void *handle)
	315	{
	316	struct LogContext ctx = (struct LogContext )handle;
	317
	318	logfclose(ctx);
919baedb	319	bufchain_clear(&ctx->queue);
fabd1805	320	sfree(ctx);
	321	}
	322
c229ef97	323	void log_reconfig(void handle, Config cfg)
	324	{
	325	struct LogContext ctx = (struct LogContext )handle;
	326	int reset_logging;
	327
9a30e26b	328	if (!filename_equal(ctx->cfg.logfilename, cfg->logfilename) \|\|
c229ef97	329	ctx->cfg.logtype != cfg->logtype)
	330	reset_logging = TRUE;
	331	else
	332	reset_logging = FALSE;
	333
	334	if (reset_logging)
4512d432	335	logfclose(ctx);
c229ef97	336
	337	ctx->cfg = cfg; / STRUCTURE COPY */
	338
	339	if (reset_logging)
4512d432	340	logfopen(ctx);
c229ef97	341	}
c229ef97	342
00db133f	343	/*
	344	* translate format codes into time/date strings
	345	* and insert them into log file name
	346	*
	347	* "&Y":YYYY "&m":MM "&d":DD "&T":hhmm "&h":<hostname> "&&":&
	348	*/
9a30e26b	349	static void xlatlognam(Filename *dest, Filename src,
9a30e26b	350	char hostname, struct tm tm) {
00db133f	351	char buf[10], *bufp;
00db133f	352	int size;
9a30e26b	353	char buffer[FILENAME_MAX];
9a30e26b	354	int len = sizeof(buffer)-1;
9fab77dc	355	char *d;
9fab77dc	356	const char *s;
9a30e26b	357
9a30e26b	358	d = buffer;
9fab77dc	359	s = filename_to_str(&src);
00db133f	360
	361	while (*s) {
	362	/* Let (bufp, len) be the string to append. */
	363	bufp = buf; /* don't usually override this */
	364	if (*s == '&') {
	365	char c;
	366	s++;
1709795f	367	size = 0;
00db133f	368	if (s) switch (c = s++, tolower(c)) {
	369	case 'y':
	370	size = strftime(buf, sizeof(buf), "%Y", tm);
	371	break;
	372	case 'm':
	373	size = strftime(buf, sizeof(buf), "%m", tm);
	374	break;
	375	case 'd':
	376	size = strftime(buf, sizeof(buf), "%d", tm);
	377	break;
	378	case 't':
	379	size = strftime(buf, sizeof(buf), "%H%M%S", tm);
	380	break;
	381	case 'h':
	382	bufp = hostname;
	383	size = strlen(bufp);
	384	break;
	385	default:
	386	buf[0] = '&';
	387	size = 1;
	388	if (c != '&')
	389	buf[size++] = c;
	390	}
	391	} else {
	392	buf[0] = *s++;
	393	size = 1;
	394	}
	395	if (size > len)
	396	size = len;
	397	memcpy(d, bufp, size);
	398	d += size;
	399	len -= size;
	400	}
	401	*d = '\0';
9a30e26b	402
0ac2edb3	403	*dest = filename_from_str(buffer);
00db133f	404	}