[ashd.git] / src / accesslog.c

/*
    ashd - A Sane HTTP Daemon
    Copyright (C) 2008  Fredrik Tolf <fredrik@dolda2000.com>

    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 3 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, see <http://www.gnu.org/licenses/>.
*/

#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <sys/poll.h>
#include <time.h>
#include <sys/time.h>
#include <signal.h>
#include <fcntl.h>
#include <sys/stat.h>

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <utils.h>
#include <log.h>
#include <req.h>
#include <proc.h>

#define DEFFORMAT "%{%Y-%m-%d %H:%M:%S}t %m %u %A \"%G\""

static int ch;
static char *outname = NULL;
static FILE *out;
static int flush = 1, locklog = 1;
static char *format;
static struct timeval now;
static volatile int reopen = 0;

static void qputs(char *sp, FILE *o)
{
    unsigned char *s = (unsigned char *)sp;
    
    for(; *s; s++) {
	if(*s == '\"') {
	    fputs("\\\"", o);
	} else if(*s == '\\') {
	    fputs("\\\\", o);
	} else if(*s == '\n') {
	    fputs("\\n", o);
	} else if(*s == '\t') {
	    fputs("\\t", o);
	} else if((*s < 32) || (*s >= 128)) {
	    fprintf(o, "\\x%02x", (int)*s);
	} else {
	    fputc(*s, o);
	}
    }
}

static void logitem(struct hthead *req, char o, char *d)
{
    char *h, *p;
    char buf[1024];
    
    switch(o) {
    case '%':
	putc('%', out);
	break;
    case 'h':
	if((h = getheader(req, d)) == NULL) {
	    putc('-', out);
	} else {
	    qputs(h, out);
	}
	break;
    case 'u':
	qputs(req->url, out);
	break;
    case 'U':
	strcpy(buf, req->url);
	if((p = strchr(buf, '?')) != NULL)
	    *p = 0;
	qputs(buf, out);
	break;
    case 'm':
	qputs(req->method, out);
	break;
    case 'r':
	qputs(req->rest, out);
	break;
    case 'v':
	qputs(req->ver, out);
	break;
    case 't':
	if(!*d)
	    d = "%a, %d %b %Y %H:%M:%S %z";
	strftime(buf, sizeof(buf), d, localtime(&now.tv_sec));
	qputs(buf, out);
	break;
    case 'T':
	if(!*d)
	    d = "%a, %d %b %Y %H:%M:%S %z";
	strftime(buf, sizeof(buf), d, gmtime(&now.tv_sec));
	qputs(buf, out);
	break;
    case 's':
	fprintf(out, "%06i", (int)now.tv_usec);
	break;
    case 'A':
	logitem(req, 'h', "X-Ash-Address");
	break;
    case 'H':
	logitem(req, 'h', "Host");
	break;
    case 'R':
	logitem(req, 'h', "Referer");
	break;
    case 'G':
	logitem(req, 'h', "User-Agent");
	break;
    }
}

static void logreq(struct hthead *req)
{
    char *p, *p2;
    char d[strlen(format)];
    char o;
    
    p = format;
    while(*p) {
	if(*p == '%') {
	    p++;
	    if(*p == '{') {
		p++;
		if((p2 = strchr(p, '}')) == NULL)
		    continue;
		memcpy(d, p, p2 - p);
		d[p2 - p] = 0;
		p = p2 + 1;
	    } else {
		d[0] = 0;
	    }
	    o = *p++;
	    if(o == 0)
		break;
	    logitem(req, o, d);
	} else {
	    fputc(*p++, out);
	}
    }
    fputc('\n', out);
    if(flush)
	fflush(out);
}

static void serve(struct hthead *req, int fd)
{
    gettimeofday(&now, NULL);
    if(sendreq(ch, req, fd)) {
	flog(LOG_ERR, "accesslog: could not pass request to child: %s", strerror(errno));
	exit(1);
    }
    logreq(req);
}

static void sighandler(int sig)
{
    if(sig == SIGHUP)
	reopen = 1;
}

static int lockfile(FILE *file)
{
    struct flock ld;
    
    memset(&ld, 0, sizeof(ld));
    ld.l_type = F_WRLCK;
    ld.l_whence = SEEK_SET;
    ld.l_start = 0;
    ld.l_len = 0;
    return(fcntl(fileno(file), F_SETLK, &ld));
}

static void fetchpid(char *filename)
{
    int fd, ret;
    struct flock ld;
    
    if((fd = open(filename, O_WRONLY)) < 0) {
	fprintf(stderr, "accesslog: %s: %s\n", filename, strerror(errno));
	exit(1);
    }
    memset(&ld, 0, sizeof(ld));
    ld.l_type = F_WRLCK;
    ld.l_whence = SEEK_SET;
    ld.l_start = 0;
    ld.l_len = 0;
    ret = fcntl(fd, F_GETLK, &ld);
    close(fd);
    if(ret) {
	fprintf(stderr, "accesslog: %s: %s\n", filename, strerror(errno));
	exit(1);
    }
    if(ld.l_type == F_UNLCK) {
	fprintf(stderr, "accesslog: %s: not locked\n", filename);
	exit(1);
    }
    printf("%i\n", (int)ld.l_pid);
}

static void reopenlog(void)
{
    FILE *new;
    struct stat olds, news;
    
    if(outname == NULL) {
	flog(LOG_WARNING, "accesslog: received SIGHUP but logging to stdout, so ignoring");
	return;
    }
    if(locklog) {
	if(fstat(fileno(out), &olds)) {
	    flog(LOG_ERR, "accesslog: could not stat current logfile(?!): %s", strerror(errno));
	    return;
	}
	if(!stat(outname, &news)) {
	    if((olds.st_dev == news.st_dev) && (olds.st_ino == news.st_ino)) {
		/*
		 * This needs to be ignored, because if the same logfile
		 * is opened and then closed, the lock is lost. To quote
		 * the Linux fcntl(2) manpage: "This is bad." No kidding.
		 *
		 * Technically, there is a race condition here when the
		 * file has been stat'ed but not yet opened, where the old
		 * log file, having been previously renamed, changes name
		 * back to the name accesslog knows and is thus reopened
		 * regardlessly, but I think that might fit under the
		 * idiom "pathological case". It should, at least, not be
		 * a security problem.
		 */
		flog(LOG_INFO, "accesslog: received SIGHUP, but logfile has not changed, so ignoring");
		return;
	    }
	}
    }
    if((new = fopen(outname, "a")) == NULL) {
	flog(LOG_WARNING, "accesslog: could not reopen log file `%s' on SIGHUP: %s", outname, strerror(errno));
	return;
    }
    fcntl(fileno(new), F_SETFD, FD_CLOEXEC);
    if(locklog) {
	if(lockfile(new)) {
	    if((errno == EAGAIN) || (errno == EACCES)) {
		flog(LOG_ERR, "accesslog: logfile is already locked; reverting to current log", strerror(errno));
		fclose(new);
		return;
	    } else {
		flog(LOG_WARNING, "accesslog: could not lock logfile, so no lock will be held: %s", strerror(errno));
	    }
	}
    }
    fclose(out);
    out = new;
}

static void usage(FILE *out)
{
    fprintf(out, "usage: accesslog [-hFaL] [-f FORMAT] [-p PIDFILE] OUTFILE CHILD [ARGS...]\n");
    fprintf(out, "       accesslog -P LOGFILE\n");
}

int main(int argc, char **argv)
{
    int c, ret;
    struct hthead *req;
    int fd;
    struct pollfd pfd[2];
    char *pidfile;
    FILE *pidout;
    
    pidfile = NULL;
    while((c = getopt(argc, argv, "+hFaLf:p:P:")) >= 0) {
	switch(c) {
	case 'h':
	    usage(stdout);
	    exit(0);
	case 'F':
	    flush = 0;
	    break;
	case 'L':
	    locklog = 0;
	    break;
	case 'f':
	    format = optarg;
	    break;
	case 'P':
	    fetchpid(optarg);
	    exit(0);
	case 'p':
	    pidfile = optarg;
	    break;
	case 'a':
	    format = "%A - - [%{%d/%b/%Y:%H:%M:%S %z}t] \"%m %u %v\" - - \"%R\" \"%G\"";
	    break;
	default:
	    usage(stderr);
	    exit(1);
	}
    }
    if(argc - optind < 2) {
	usage(stderr);
	exit(1);
    }
    if(format == NULL)
	format = DEFFORMAT;
    if(!strcmp(argv[optind], "-"))
	outname = NULL;
    else
	outname = argv[optind];
    if(outname == NULL) {
	out = stdout;
	locklog = 0;
    } else {
	if((out = fopen(argv[optind], "a")) == NULL) {
	    flog(LOG_ERR, "accesslog: could not open %s for logging: %s", argv[optind], strerror(errno));
	    exit(1);
	}
	fcntl(fileno(out), F_SETFD, FD_CLOEXEC);
    }
    if(locklog) {
	if(lockfile(out)) {
	    if((errno == EAGAIN) || (errno == EACCES)) {
		flog(LOG_ERR, "accesslog: logfile is already locked", strerror(errno));
		exit(1);
	    } else {
		flog(LOG_WARNING, "accesslog: could not lock logfile: %s", strerror(errno));
	    }
	}
    }
    if((ch = stdmkchild(argv + optind + 1, NULL, NULL)) < 0) {
	flog(LOG_ERR, "accesslog: could not fork child: %s", strerror(errno));
	exit(1);
    }
    signal(SIGHUP, sighandler);
    if(pidfile) {
	if(!strcmp(pidfile, "-")) {
	    if(!outname) {
		flog(LOG_ERR, "accesslog: cannot derive PID file name without an output file");
		exit(1);
	    }
	    pidfile = sprintf2("%s.pid", outname);
	}
	if((pidout = fopen(pidfile, "w")) == NULL) {
	    flog(LOG_ERR, "accesslog: could not open PID file %s for writing: %s", pidfile);
	    exit(1);
	}
	fprintf(pidout, "%i\n", (int)getpid());
	fclose(pidout);
    }
    while(1) {
	if(reopen) {
	    reopenlog();
	    reopen = 0;
	}
	memset(pfd, 0, sizeof(pfd));
	pfd[0].fd = 0;
	pfd[0].events = POLLIN;
	pfd[1].fd = ch;
	pfd[1].events = POLLHUP;
	if((ret = poll(pfd, 2, -1)) < 0) {
	    if(errno != EINTR) {
		flog(LOG_ERR, "accesslog: error in poll: %s", strerror(errno));
		exit(1);
	    }
	}
	if(pfd[0].revents) {
	    if((fd = recvreq(0, &req)) < 0) {
		if(errno == 0)
		    break;
		flog(LOG_ERR, "accesslog: error in recvreq: %s", strerror(errno));
		exit(1);
	    }
	    serve(req, fd);
	    freehthead(req);
	    close(fd);
	}
	if(pfd[1].revents & POLLHUP)
	    break;
    }
    fclose(out);
    if(pidfile != NULL)
	unlink(pidfile);
    return(0);
}
Commit	Line	Data
048ac115 FT	1	/*
	2	ashd - A Sane HTTP Daemon
	3	Copyright (C) 2008 Fredrik Tolf <fredrik@dolda2000.com>
	4
	5	This program is free software: you can redistribute it and/or modify
	6	it under the terms of the GNU General Public License as published by
	7	the Free Software Foundation, either version 3 of the License, or
	8	(at your option) any later version.
	9
	10	This program is distributed in the hope that it will be useful,
	11	but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	GNU General Public License for more details.
	14
	15	You should have received a copy of the GNU General Public License
	16	along with this program. If not, see <http://www.gnu.org/licenses/>.
	17	*/
	18
	19	#include <stdlib.h>
	20	#include <stdio.h>
	21	#include <unistd.h>
	22	#include <string.h>
	23	#include <errno.h>
	24	#include <sys/poll.h>
	25	#include <time.h>
	26	#include <sys/time.h>
f99bcc64	27	#include <signal.h>
472abd3c	28	#include <fcntl.h>
ca170d77	29	#include <sys/stat.h>
048ac115 FT	30
	31	#ifdef HAVE_CONFIG_H
	32	#include <config.h>
	33	#endif
	34	#include <utils.h>
	35	#include <log.h>
	36	#include <req.h>
	37	#include <proc.h>
	38
	39	#define DEFFORMAT "%{%Y-%m-%d %H:%M:%S}t %m %u %A \"%G\""
	40
	41	static int ch;
f99bcc64	42	static char *outname = NULL;
048ac115	43	static FILE *out;
ca170d77	44	static int flush = 1, locklog = 1;
048ac115	45	static char *format;
af222eef	46	static struct timeval now;
f99bcc64	47	static volatile int reopen = 0;
048ac115	48
39522714	49	static void qputs(char sp, FILE o)
048ac115	50	{
39522714 FT	51	unsigned char s = (unsigned char )sp;
39522714 FT	52
048ac115 FT	53	for(; *s; s++) {
	54	if(*s == '\"') {
	55	fputs("\\\"", o);
	56	} else if(*s == '\\') {
	57	fputs("\\\\", o);
	58	} else if(*s == '\n') {
	59	fputs("\\n", o);
	60	} else if(*s == '\t') {
	61	fputs("\\t", o);
	62	} else if((s < 32) \|\| (s >= 128)) {
39522714	63	fprintf(o, "\\x%02x", (int)*s);
048ac115 FT	64	} else {
	65	fputc(*s, o);
	66	}
	67	}
	68	}
	69
	70	static void logitem(struct hthead req, char o, char d)
	71	{
	72	char h, p;
	73	char buf[1024];
048ac115 FT	74
	75	switch(o) {
	76	case '%':
	77	putc('%', out);
	78	break;
	79	case 'h':
	80	if((h = getheader(req, d)) == NULL) {
	81	putc('-', out);
	82	} else {
	83	qputs(h, out);
	84	}
	85	break;
	86	case 'u':
	87	qputs(req->url, out);
	88	break;
	89	case 'U':
	90	strcpy(buf, req->url);
	91	if((p = strchr(buf, '?')) != NULL)
	92	*p = 0;
	93	qputs(buf, out);
	94	break;
	95	case 'm':
	96	qputs(req->method, out);
	97	break;
	98	case 'r':
	99	qputs(req->rest, out);
	100	break;
	101	case 'v':
	102	qputs(req->ver, out);
	103	break;
	104	case 't':
	105	if(!*d)
	106	d = "%a, %d %b %Y %H:%M:%S %z";
af222eef	107	strftime(buf, sizeof(buf), d, localtime(&now.tv_sec));
048ac115 FT	108	qputs(buf, out);
	109	break;
	110	case 'T':
	111	if(!*d)
	112	d = "%a, %d %b %Y %H:%M:%S %z";
af222eef	113	strftime(buf, sizeof(buf), d, gmtime(&now.tv_sec));
048ac115 FT	114	qputs(buf, out);
	115	break;
	116	case 's':
af222eef	117	fprintf(out, "%06i", (int)now.tv_usec);
048ac115 FT	118	break;
	119	case 'A':
	120	logitem(req, 'h', "X-Ash-Address");
	121	break;
	122	case 'H':
	123	logitem(req, 'h', "Host");
	124	break;
	125	case 'R':
	126	logitem(req, 'h', "Referer");
	127	break;
	128	case 'G':
	129	logitem(req, 'h', "User-Agent");
	130	break;
	131	}
	132	}
	133
	134	static void logreq(struct hthead *req)
	135	{
	136	char p, p2;
	137	char d[strlen(format)];
	138	char o;
	139
	140	p = format;
	141	while(*p) {
	142	if(*p == '%') {
	143	p++;
	144	if(*p == '{') {
	145	p++;
	146	if((p2 = strchr(p, '}')) == NULL)
	147	continue;
	148	memcpy(d, p, p2 - p);
	149	d[p2 - p] = 0;
	150	p = p2 + 1;
	151	} else {
	152	d[0] = 0;
	153	}
	154	o = *p++;
	155	if(o == 0)
	156	break;
	157	logitem(req, o, d);
	158	} else {
	159	fputc(*p++, out);
	160	}
	161	}
	162	fputc('\n', out);
	163	if(flush)
	164	fflush(out);
	165	}
	166
	167	static void serve(struct hthead *req, int fd)
	168	{
af222eef	169	gettimeofday(&now, NULL);
048ac115 FT	170	if(sendreq(ch, req, fd)) {
	171	flog(LOG_ERR, "accesslog: could not pass request to child: %s", strerror(errno));
	172	exit(1);
	173	}
	174	logreq(req);
	175	}
	176
f99bcc64 FT	177	static void sighandler(int sig)
	178	{
	179	if(sig == SIGHUP)
	180	reopen = 1;
	181	}
	182
ca170d77 FT	183	static int lockfile(FILE *file)
	184	{
	185	struct flock ld;
	186
	187	memset(&ld, 0, sizeof(ld));
	188	ld.l_type = F_WRLCK;
	189	ld.l_whence = SEEK_SET;
	190	ld.l_start = 0;
	191	ld.l_len = 0;
	192	return(fcntl(fileno(file), F_SETLK, &ld));
	193	}
	194
	195	static void fetchpid(char *filename)
	196	{
	197	int fd, ret;
	198	struct flock ld;
	199
	200	if((fd = open(filename, O_WRONLY)) < 0) {
	201	fprintf(stderr, "accesslog: %s: %s\n", filename, strerror(errno));
	202	exit(1);
	203	}
	204	memset(&ld, 0, sizeof(ld));
	205	ld.l_type = F_WRLCK;
	206	ld.l_whence = SEEK_SET;
	207	ld.l_start = 0;
	208	ld.l_len = 0;
	209	ret = fcntl(fd, F_GETLK, &ld);
	210	close(fd);
	211	if(ret) {
	212	fprintf(stderr, "accesslog: %s: %s\n", filename, strerror(errno));
	213	exit(1);
	214	}
	215	if(ld.l_type == F_UNLCK) {
	216	fprintf(stderr, "accesslog: %s: not locked\n", filename);
	217	exit(1);
	218	}
	219	printf("%i\n", (int)ld.l_pid);
	220	}
	221
f99bcc64 FT	222	static void reopenlog(void)
	223	{
	224	FILE *new;
ca170d77	225	struct stat olds, news;
f99bcc64 FT	226
	227	if(outname == NULL) {
	228	flog(LOG_WARNING, "accesslog: received SIGHUP but logging to stdout, so ignoring");
	229	return;
	230	}
ca170d77 FT	231	if(locklog) {
	232	if(fstat(fileno(out), &olds)) {
	233	flog(LOG_ERR, "accesslog: could not stat current logfile(?!): %s", strerror(errno));
	234	return;
	235	}
	236	if(!stat(outname, &news)) {
	237	if((olds.st_dev == news.st_dev) && (olds.st_ino == news.st_ino)) {
	238	/*
	239	* This needs to be ignored, because if the same logfile
	240	* is opened and then closed, the lock is lost. To quote
	241	* the Linux fcntl(2) manpage: "This is bad." No kidding.
	242	*
	243	* Technically, there is a race condition here when the
	244	* file has been stat'ed but not yet opened, where the old
	245	* log file, having been previously renamed, changes name
	246	* back to the name accesslog knows and is thus reopened
	247	* regardlessly, but I think that might fit under the
	248	* idiom "pathological case". It should, at least, not be
	249	* a security problem.
	250	*/
	251	flog(LOG_INFO, "accesslog: received SIGHUP, but logfile has not changed, so ignoring");
	252	return;
	253	}
	254	}
	255	}
f99bcc64 FT	256	if((new = fopen(outname, "a")) == NULL) {
	257	flog(LOG_WARNING, "accesslog: could not reopen log file `%s' on SIGHUP: %s", outname, strerror(errno));
	258	return;
	259	}
e09f3227	260	fcntl(fileno(new), F_SETFD, FD_CLOEXEC);
ca170d77 FT	261	if(locklog) {
	262	if(lockfile(new)) {
	263	if((errno == EAGAIN) \|\| (errno == EACCES)) {
	264	flog(LOG_ERR, "accesslog: logfile is already locked; reverting to current log", strerror(errno));
	265	fclose(new);
	266	return;
	267	} else {
	268	flog(LOG_WARNING, "accesslog: could not lock logfile, so no lock will be held: %s", strerror(errno));
	269	}
	270	}
	271	}
f99bcc64 FT	272	fclose(out);
	273	out = new;
	274	}
	275
048ac115 FT	276	static void usage(FILE *out)
048ac115 FT	277	{
ca170d77	278	fprintf(out, "usage: accesslog [-hFaL] [-f FORMAT] [-p PIDFILE] OUTFILE CHILD [ARGS...]\n");
e51483a1	279	fprintf(out, " accesslog -P LOGFILE\n");
048ac115 FT	280	}
	281
	282	int main(int argc, char **argv)
	283	{
	284	int c, ret;
	285	struct hthead *req;
	286	int fd;
	287	struct pollfd pfd[2];
472abd3c FT	288	char *pidfile;
472abd3c FT	289	FILE *pidout;
048ac115	290
472abd3c	291	pidfile = NULL;
ca170d77	292	while((c = getopt(argc, argv, "+hFaLf:p:P:")) >= 0) {
048ac115 FT	293	switch(c) {
	294	case 'h':
	295	usage(stdout);
	296	exit(0);
048ac115 FT	297	case 'F':
	298	flush = 0;
	299	break;
ca170d77 FT	300	case 'L':
	301	locklog = 0;
	302	break;
048ac115 FT	303	case 'f':
	304	format = optarg;
	305	break;
ca170d77 FT	306	case 'P':
	307	fetchpid(optarg);
	308	exit(0);
472abd3c FT	309	case 'p':
	310	pidfile = optarg;
	311	break;
048ac115 FT	312	case 'a':
	313	format = "%A - - [%{%d/%b/%Y:%H:%M:%S %z}t] \"%m %u %v\" - - \"%R\" \"%G\"";
	314	break;
	315	default:
	316	usage(stderr);
	317	exit(1);
	318	}
	319	}
9701afc5	320	if(argc - optind < 2) {
048ac115 FT	321	usage(stderr);
	322	exit(1);
	323	}
	324	if(format == NULL)
	325	format = DEFFORMAT;
f99bcc64 FT	326	if(!strcmp(argv[optind], "-"))
	327	outname = NULL;
	328	else
	329	outname = argv[optind];
	330	if(outname == NULL) {
9701afc5	331	out = stdout;
e09f3227	332	locklog = 0;
9701afc5 FT	333	} else {
	334	if((out = fopen(argv[optind], "a")) == NULL) {
	335	flog(LOG_ERR, "accesslog: could not open %s for logging: %s", argv[optind], strerror(errno));
048ac115 FT	336	exit(1);
048ac115 FT	337	}
e09f3227	338	fcntl(fileno(out), F_SETFD, FD_CLOEXEC);
048ac115	339	}
ca170d77 FT	340	if(locklog) {
	341	if(lockfile(out)) {
	342	if((errno == EAGAIN) \|\| (errno == EACCES)) {
	343	flog(LOG_ERR, "accesslog: logfile is already locked", strerror(errno));
	344	exit(1);
	345	} else {
	346	flog(LOG_WARNING, "accesslog: could not lock logfile: %s", strerror(errno));
	347	}
	348	}
	349	}
9701afc5	350	if((ch = stdmkchild(argv + optind + 1, NULL, NULL)) < 0) {
e3f12675	351	flog(LOG_ERR, "accesslog: could not fork child: %s", strerror(errno));
048ac115 FT	352	exit(1);
048ac115 FT	353	}
f99bcc64	354	signal(SIGHUP, sighandler);
472abd3c FT	355	if(pidfile) {
	356	if(!strcmp(pidfile, "-")) {
	357	if(!outname) {
	358	flog(LOG_ERR, "accesslog: cannot derive PID file name without an output file");
	359	exit(1);
	360	}
	361	pidfile = sprintf2("%s.pid", outname);
	362	}
	363	if((pidout = fopen(pidfile, "w")) == NULL) {
	364	flog(LOG_ERR, "accesslog: could not open PID file %s for writing: %s", pidfile);
	365	exit(1);
	366	}
	367	fprintf(pidout, "%i\n", (int)getpid());
	368	fclose(pidout);
	369	}
048ac115	370	while(1) {
f99bcc64 FT	371	if(reopen) {
	372	reopenlog();
	373	reopen = 0;
	374	}
048ac115 FT	375	memset(pfd, 0, sizeof(pfd));
	376	pfd[0].fd = 0;
	377	pfd[0].events = POLLIN;
	378	pfd[1].fd = ch;
	379	pfd[1].events = POLLHUP;
	380	if((ret = poll(pfd, 2, -1)) < 0) {
	381	if(errno != EINTR) {
	382	flog(LOG_ERR, "accesslog: error in poll: %s", strerror(errno));
	383	exit(1);
	384	}
	385	}
	386	if(pfd[0].revents) {
	387	if((fd = recvreq(0, &req)) < 0) {
	388	if(errno == 0)
	389	break;
	390	flog(LOG_ERR, "accesslog: error in recvreq: %s", strerror(errno));
	391	exit(1);
	392	}
	393	serve(req, fd);
	394	freehthead(req);
	395	close(fd);
	396	}
	397	if(pfd[1].revents & POLLHUP)
	398	break;
	399	}
f95bc205	400	fclose(out);
472abd3c FT	401	if(pidfile != NULL)
472abd3c FT	402	unlink(pidfile);
048ac115 FT	403	return(0);
048ac115 FT	404	}