[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" :
		       ctx->cfg.logtype == LGTYP_SSHRAW ? "SSH raw data" :
		       "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 &&
	ctx->cfg.logtype != LGTYP_SSHRAW)
	return;
    logprintf(ctx, "Event Log: %s\r\n", event);
    logflush(ctx);
}

/*
 * 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_SSHRAW ||
          (ctx->cfg.logtype == LGTYP_PACKETS && texttype)))
	return;

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

    /*
     * 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":hhmmss   "&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" :
bf8a49a1	109	ctx->cfg.logtype == LGTYP_SSHRAW ? "SSH raw data" :
919baedb	110	"unknown"),
	111	filename_to_str(&ctx->currlogfilename));
	112	logevent(ctx->frontend, event);
	113	sfree(event);
	114
	115	/*
	116	* Having either succeeded or failed in opening the log file,
	117	* we should write any queued data out.
	118	*/
8b029099	119	assert(ctx->state != L_OPENING); /* make _sure_ it won't be requeued */
919baedb	120	while (bufchain_size(&ctx->queue)) {
	121	void *data;
	122	int len;
	123	bufchain_prefix(&ctx->queue, &data, &len);
	124	logwrite(ctx, data, len);
	125	bufchain_consume(&ctx->queue, len);
	126	}
	127	}
	128
	129	/*
	130	* Open the log file. Takes care of detecting an already-existing
	131	* file and asking the user whether they want to append, overwrite
	132	* or cancel logging.
	133	*/
	134	void logfopen(void *handle)
	135	{
	136	struct LogContext ctx = (struct LogContext )handle;
	137	struct tm tm;
	138	int mode;
	139
	140	/* Prevent repeat calls */
8b029099	141	if (ctx->state != L_CLOSED)
919baedb	142	return;
	143
	144	if (!ctx->cfg.logtype)
	145	return;
	146
	147	tm = ltime();
	148
	149	/* substitute special codes in file name */
	150	xlatlognam(&ctx->currlogfilename, ctx->cfg.logfilename,ctx->cfg.host, &tm);
	151
	152	ctx->lgfp = f_open(ctx->currlogfilename, "r"); /* file already present? */
	153	if (ctx->lgfp) {
	154	fclose(ctx->lgfp);
	155	if (ctx->cfg.logxfovr != LGXF_ASK) {
	156	mode = ((ctx->cfg.logxfovr == LGXF_OVR) ? 2 : 1);
	157	} else
	158	mode = askappend(ctx->frontend, ctx->currlogfilename,
	159	logfopen_callback, ctx);
	160	} else
	161	mode = 2; /* create == overwrite */
	162
	163	if (mode < 0)
8b029099	164	ctx->state = L_OPENING;
919baedb	165	else
	166	logfopen_callback(ctx, mode); /* open the file */
	167	}
	168
	169	void logfclose(void *handle)
	170	{
	171	struct LogContext ctx = (struct LogContext )handle;
	172	if (ctx->lgfp) {
	173	fclose(ctx->lgfp);
	174	ctx->lgfp = NULL;
	175	}
8b029099	176	ctx->state = L_CLOSED;
919baedb	177	}
	178
	179	/*
	180	* Log session traffic.
	181	*/
	182	void logtraffic(void *handle, unsigned char c, int logmode)
	183	{
	184	struct LogContext ctx = (struct LogContext )handle;
	185	if (ctx->cfg.logtype > 0) {
	186	if (ctx->cfg.logtype == logmode)
	187	logwrite(ctx, &c, 1);
	188	}
	189	}
	190
11cc5e30	191	/*
382908ad	192	* Log an Event Log entry. Used in SSH packet logging mode; this is
	193	* also as convenient a place as any to put the output of Event Log
	194	* entries to stderr when a command-line tool is in verbose mode.
	195	* (In particular, this is a better place to put it than in the
	196	* front ends, because it only has to be done once for all
	197	* platforms. Platforms which don't have a meaningful stderr can
	198	* just avoid defining FLAG_STDERR.
fb89f7ff	199	*/
cbe2d68f	200	void log_eventlog(void handle, const char event)
fb89f7ff	201	{
a8327734	202	struct LogContext ctx = (struct LogContext )handle;
382908ad	203	if ((flags & FLAG_STDERR) && (flags & FLAG_VERBOSE)) {
	204	fprintf(stderr, "%s\n", event);
	205	fflush(stderr);
	206	}
bf8a49a1	207	if (ctx->cfg.logtype != LGTYP_PACKETS &&
bf8a49a1	208	ctx->cfg.logtype != LGTYP_SSHRAW)
fb89f7ff	209	return;
919baedb	210	logprintf(ctx, "Event Log: %s\r\n", event);
bf8a49a1	211	logflush(ctx);
fb89f7ff	212	}
	213
	214	/*
00db133f	215	* Log an SSH packet.
9a10ecf4	216	* If n_blanks != 0, blank or omit some parts.
9a10ecf4	217	* Set of blanking areas must be in increasing order.
00db133f	218	*/
a8327734	219	void log_packet(void *handle, int direction, int type,
9a10ecf4	220	char texttype, void data, int len,
9a10ecf4	221	int n_blanks, const struct logblank_t *blanks)
00db133f	222	{
a8327734	223	struct LogContext ctx = (struct LogContext )handle;
00db133f	224	char dumpdata[80], smalldata[5];
919baedb	225	int p = 0, b = 0, omitted = 0;
919baedb	226	int output_pos = 0; /* NZ if pending output in dumpdata */
00db133f	227
bf8a49a1	228	if (!(ctx->cfg.logtype == LGTYP_SSHRAW \|\|
bf8a49a1	229	(ctx->cfg.logtype == LGTYP_PACKETS && texttype)))
00db133f	230	return;
9a10ecf4	231
919baedb	232	/* Packet header. */
bf8a49a1	233	if (texttype)
	234	logprintf(ctx, "%s packet type %d / 0x%02x (%s)\r\n",
	235	direction == PKT_INCOMING ? "Incoming" : "Outgoing",
	236	type, type, texttype);
	237	else
	238	logprintf(ctx, "%s raw data\r\n",
	239	direction == PKT_INCOMING ? "Incoming" : "Outgoing");
919baedb	240
	241	/*
	242	* Output a hex/ASCII dump of the packet body, blanking/omitting
	243	* parts as specified.
	244	*/
	245	while (p < len) {
	246	int blktype;
	247
	248	/* Move to a current entry in the blanking array. */
	249	while ((b < n_blanks) &&
	250	(p >= blanks[b].offset + blanks[b].len))
	251	b++;
	252	/* Work out what type of blanking to apply to
	253	* this byte. */
	254	blktype = PKTLOG_EMIT; /* default */
	255	if ((b < n_blanks) &&
	256	(p >= blanks[b].offset) &&
	257	(p < blanks[b].offset + blanks[b].len))
	258	blktype = blanks[b].type;
	259
	260	/* If we're about to stop omitting, it's time to say how
	261	* much we omitted. */
	262	if ((blktype != PKTLOG_OMIT) && omitted) {
	263	logprintf(ctx, " (%d byte%s omitted)\r\n",
	264	omitted, (omitted==1?"":"s"));
	265	omitted = 0;
	266	}
9a10ecf4	267
919baedb	268	/* (Re-)initialise dumpdata as necessary
	269	* (start of row, or if we've just stopped omitting) */
	270	if (!output_pos && !omitted)
	271	sprintf(dumpdata, " %08x%s\r\n", p-(p%16), 1+316+2+16, "");
	272
	273	/* Deal with the current byte. */
	274	if (blktype == PKTLOG_OMIT) {
	275	omitted++;
	276	} else {
	277	int c;
	278	if (blktype == PKTLOG_BLANK) {
	279	c = 'X';
	280	sprintf(smalldata, "XX");
	281	} else { /* PKTLOG_EMIT */
	282	c = ((unsigned char *)data)[p];
	283	sprintf(smalldata, "%02x", c);
00db133f	284	}
919baedb	285	dumpdata[10+2+3*(p%16)] = smalldata[0];
	286	dumpdata[10+2+3*(p%16)+1] = smalldata[1];
	287	dumpdata[10+1+3*16+2+(p%16)] = (isprint(c) ? c : '.');
	288	output_pos = (p%16) + 1;
00db133f	289	}
9a10ecf4	290
919baedb	291	p++;
00db133f	292
919baedb	293	/* Flush row if necessary */
	294	if (((p % 16) == 0) \|\| (p == len) \|\| omitted) {
	295	if (output_pos) {
	296	strcpy(dumpdata + 10+1+3*16+2+output_pos, "\r\n");
	297	logwrite(ctx, dumpdata, strlen(dumpdata));
	298	output_pos = 0;
	299	}
00db133f	300	}
00db133f	301
00db133f	302	}
00db133f	303
919baedb	304	/* Tidy up */
	305	if (omitted)
	306	logprintf(ctx, " (%d byte%s omitted)\r\n",
	307	omitted, (omitted==1?"":"s"));
	308	logflush(ctx);
00db133f	309	}
00db133f	310
c229ef97	311	void log_init(void frontend, Config *cfg)
a8327734	312	{
3d88e64d	313	struct LogContext *ctx = snew(struct LogContext);
a8327734	314	ctx->lgfp = NULL;
8b029099	315	ctx->state = L_CLOSED;
a8327734	316	ctx->frontend = frontend;
c229ef97	317	ctx->cfg = cfg; / STRUCTURE COPY */
919baedb	318	bufchain_init(&ctx->queue);
a8327734	319	return ctx;
	320	}
	321
fabd1805	322	void log_free(void *handle)
	323	{
	324	struct LogContext ctx = (struct LogContext )handle;
	325
	326	logfclose(ctx);
919baedb	327	bufchain_clear(&ctx->queue);
fabd1805	328	sfree(ctx);
	329	}
	330
c229ef97	331	void log_reconfig(void handle, Config cfg)
	332	{
	333	struct LogContext ctx = (struct LogContext )handle;
	334	int reset_logging;
	335
9a30e26b	336	if (!filename_equal(ctx->cfg.logfilename, cfg->logfilename) \|\|
c229ef97	337	ctx->cfg.logtype != cfg->logtype)
	338	reset_logging = TRUE;
	339	else
	340	reset_logging = FALSE;
	341
	342	if (reset_logging)
4512d432	343	logfclose(ctx);
c229ef97	344
	345	ctx->cfg = cfg; / STRUCTURE COPY */
	346
	347	if (reset_logging)
4512d432	348	logfopen(ctx);
c229ef97	349	}
c229ef97	350
00db133f	351	/*
	352	* translate format codes into time/date strings
	353	* and insert them into log file name
	354	*
6e8f9cab	355	* "&Y":YYYY "&m":MM "&d":DD "&T":hhmmss "&h":<hostname> "&&":&
00db133f	356	*/
9a30e26b	357	static void xlatlognam(Filename *dest, Filename src,
9a30e26b	358	char hostname, struct tm tm) {
00db133f	359	char buf[10], *bufp;
00db133f	360	int size;
9a30e26b	361	char buffer[FILENAME_MAX];
9a30e26b	362	int len = sizeof(buffer)-1;
9fab77dc	363	char *d;
9fab77dc	364	const char *s;
9a30e26b	365
9a30e26b	366	d = buffer;
9fab77dc	367	s = filename_to_str(&src);
00db133f	368
	369	while (*s) {
	370	/* Let (bufp, len) be the string to append. */
	371	bufp = buf; /* don't usually override this */
	372	if (*s == '&') {
	373	char c;
	374	s++;
1709795f	375	size = 0;
00db133f	376	if (s) switch (c = s++, tolower(c)) {
	377	case 'y':
	378	size = strftime(buf, sizeof(buf), "%Y", tm);
	379	break;
	380	case 'm':
	381	size = strftime(buf, sizeof(buf), "%m", tm);
	382	break;
	383	case 'd':
	384	size = strftime(buf, sizeof(buf), "%d", tm);
	385	break;
	386	case 't':
	387	size = strftime(buf, sizeof(buf), "%H%M%S", tm);
	388	break;
	389	case 'h':
	390	bufp = hostname;
	391	size = strlen(bufp);
	392	break;
	393	default:
	394	buf[0] = '&';
	395	size = 1;
	396	if (c != '&')
	397	buf[size++] = c;
	398	}
	399	} else {
	400	buf[0] = *s++;
	401	size = 1;
	402	}
	403	if (size > len)
	404	size = len;
	405	memcpy(d, bufp, size);
	406	d += size;
	407	len -= size;
	408	}
	409	*d = '\0';
9a30e26b	410
0ac2edb3	411	*dest = filename_from_str(buffer);
00db133f	412	}