[ashd.git] / src / dirplex / dirplex.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 <string.h>
#include <unistd.h>
#include <errno.h>
#include <sys/stat.h>
#include <ctype.h>
#include <dirent.h>
#include <time.h>
#include <sys/wait.h>
#include <sys/signal.h>

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

#include "dirplex.h"

time_t now;

static void chinit(void *idata)
{
    char *twd = idata;
    
    if(twd != NULL) {
	/* This should never be able to fail other than for critical
	 * I/O errors or some such, since the path has already been
	 * traversed. */
	if(chdir(twd))
	    exit(127);
    }
}

static void childerror(struct hthead *req, int fd)
{
    if(errno == EAGAIN)
	simpleerror(fd, 500, "Server Error", "The request handler is overloaded.");
    else
	simpleerror(fd, 500, "Server Error", "The request handler crashed.");
}

static void handle(struct hthead *req, int fd, char *path, struct pattern *pat)
{
    struct child *ch;
    struct config *ccf;
    struct headmod *head;
    char *twd;

    for(head = pat->headers; head != NULL; head = head->next) {
	headrmheader(req, head->name);
	headappheader(req, head->name, head->value);
    }
    if(!strncmp(path, "./", 2) && path[2])
	path += 2;
    if(pat->fchild) {
	headappheader(req, "X-Ash-File", path);
	stdforkserve(pat->fchild, req, fd, NULL, NULL);
    } else {
	if((ch = findchild(path, pat->childnm, &ccf)) == NULL) {
	    flog(LOG_ERR, "child %s requested, but was not declared", pat->childnm);
	    simpleerror(fd, 500, "Configuration Error", "The server is erroneously configured. Handler %s was requested, but not declared.", pat->childnm);
	    return;
	}
	if((twd = ccf?ccf->path:NULL) != NULL) {
	    if(!strcmp(twd, ".")) {
		twd = NULL;
	    } else if(strncmp(path, twd, strlen(twd)) || (path[strlen(twd)] != '/')) {
		/* Should be an impossible case under the current (and
		 * foreseeable) scheme. */
		simpleerror(fd, 500, "Server Error", "An internal server error occurred.");
		return;
	    } else {
		path = path + strlen(twd) + 1;
	    }
	}
	headappheader(req, "X-Ash-File", path);
	if(childhandle(ch, req, fd, chinit, twd))
	    childerror(req, fd);
    }
}

static void handle404(struct hthead *req, int fd, char *path)
{
    struct child *ch;
    struct config *ccf;
    struct pattern *pat;
    
    char tmp[strlen(path) + 1];
    strcpy(tmp, path);
    if((pat = findmatch(tmp, 0, PT_NOTFOUND)) != NULL) {
	handle(req, fd, tmp, pat);
    } else {
	ch = findchild(tmp, ".notfound", &ccf);
	if(childhandle(ch, req, fd, chinit, ccf?ccf->path:NULL))
	    childerror(req, fd);
    }
}

static void handlefile(struct hthead *req, int fd, char *path)
{
    struct pattern *pat;

    if((pat = findmatch(path, 0, PT_FILE)) == NULL) {
	handle404(req, fd, path);
	return;
    }
    handle(req, fd, path, pat);
}

static char *findfile(char *path, char *name, struct stat *sb)
{
    DIR *dir;
    struct stat sbuf;
    struct dirent *dent;
    char *p, *fp, *ret;
    
    if(sb == NULL)
	sb = &sbuf;
    if((dir = opendir(path)) == NULL)
	return(NULL);
    ret = NULL;
    while((dent = readdir(dir)) != NULL) {
	/* Ignore backup files.
	 * XXX: There is probably a better and more extensible way to
	 * do this. */
	if(dent->d_name[strlen(dent->d_name) - 1] == '~')
	    continue;
	if((p = strchr(dent->d_name, '.')) == NULL)
	    continue;
	if(p - dent->d_name != strlen(name))
	    continue;
	if(strncmp(dent->d_name, name, strlen(name)))
	    continue;
	fp = sprintf3("%s/%s", path, dent->d_name);
	if(stat(fp, sb))
	    continue;
	if(!S_ISREG(sb->st_mode))
	    continue;
	ret = sstrdup(fp);
	break;
    }
    closedir(dir);
    return(ret);
}

static void handledir(struct hthead *req, int fd, char *path)
{
    struct config **cfs;
    int i, o;
    struct stat sb;
    char *inm, *ipath, *cpath;
    struct pattern *pat;
    
    cpath = sprintf2("%s/", path);
    cfs = getconfigs(cpath);
    for(i = 0; cfs[i] != NULL; i++) {
	if(cfs[i]->index != NULL) {
	    for(o = 0; cfs[i]->index[o] != NULL; o++) {
		inm = cfs[i]->index[o];
		ipath = sprintf2("%s/%s", path, inm);
		if(!stat(ipath, &sb) && S_ISREG(sb.st_mode)) {
		    handlefile(req, fd, ipath);
		    free(ipath);
		    goto out;
		}
		free(ipath);
		
		if(!strchr(inm, '.') && ((ipath = findfile(path, inm, NULL)) != NULL)) {
		    handlefile(req, fd, ipath);
		    free(ipath);
		    goto out;
		}
	    }
	    break;
	}
    }
    if((pat = findmatch(cpath, 0, PT_DIR)) != NULL) {
	handle(req, fd, cpath, pat);
	goto out;
    }
    simpleerror(fd, 403, "Not Authorized", "Will not send listings for this directory.");
    
out:
    free(cpath);
}

static int checkpath(struct hthead *req, int fd, char *path, char *rest, int final);

static int checkentry(struct hthead *req, int fd, char *path, char *rest, char *el, int final)
{
    struct stat sb;
    char *newpath;
    int rv;
    
    if(*el == '.')
	return(0);
    if(!stat(sprintf3("%s/%s", path, el), &sb)) {
	if(S_ISDIR(sb.st_mode)) {
	    if(!*rest) {
		stdredir(req, fd, 301, sprintf3("%s/", el));
		return(1);
	    }
	    newpath = sprintf2("%s/%s", path, el);
	    rv = checkpath(req, fd, newpath, rest + 1, final);
	    free(newpath);
	    return(rv);
	} else if(S_ISREG(sb.st_mode)) {
	    newpath = sprintf2("%s/%s", path, el);
	    replrest(req, rest);
	    handlefile(req, fd, newpath);
	    free(newpath);
	    return(1);
	}
	handle404(req, fd, sprintf3("%s/", path));
	return(1);
    }
    if(!strchr(el, '.') && ((newpath = findfile(path, el, NULL)) != NULL)) {
	replrest(req, rest);
	handlefile(req, fd, newpath);
	free(newpath);
	return(1);
    }
    return(0);
}

static int checkdir(struct hthead *req, int fd, char *path, char *rest)
{
    char *cpath;
    struct config *cf, *ccf;
    struct child *ch;
    
    cf = getconfig(path);
    if((cf->capture != NULL) && (cf->caproot || !cf->path || strcmp(cf->path, "."))) {
	cpath = sprintf2("%s/", path);
	if((ch = findchild(cpath, cf->capture, &ccf)) == NULL) {
	    free(cpath);
	    flog(LOG_ERR, "child %s requested for capture, but was not declared", cf->capture);
	    simpleerror(fd, 500, "Configuration Error", "The server is erroneously configured. Handler %s was requested, but not declared.", cf->capture);
	    return(1);
	}
	free(cpath);
	if(*rest == '/')
	    rest++;
	replrest(req, rest);
	if(childhandle(ch, req, fd, chinit, ccf?ccf->path:NULL))
	    childerror(req, fd);
	return(1);
    }
    return(0);
}

static int checkpath(struct hthead *req, int fd, char *path, char *rest, int final)
{
    char *p, *el;
    int rv;
    
    el = NULL;
    rv = 0;
    
    if(!strncmp(path, "./", 2))
	path += 2;
    if(checkdir(req, fd, path, rest))
	return(1);
    
    if((p = strchr(rest, '/')) == NULL) {
	el = unquoteurl(rest);
	rest = "";
    } else {
	char buf[p - rest + 1];
	memcpy(buf, rest, p - rest);
	buf[p - rest] = 0;
	el = unquoteurl(buf);
	rest = p;
    }
    if(el == NULL) {
	simpleerror(fd, 400, "Bad Request", "The requested URL contains an invalid escape sequence.");
	rv = 1;
	goto out;
    }
    if(strchr(el, '/') || (!*el && *rest)) {
	rv = 0;
	goto out;
    }
    if(!*el) {
	replrest(req, rest);
	handledir(req, fd, path);
	rv = 1;
	goto out;
    }
    rv = checkentry(req, fd, path, rest, el, final);
    
out:
    if(final && !rv) {
	handle404(req, fd, sprintf3("%s/", path));
	rv = 1;
    }
    if(el != NULL)
	free(el);
    return(rv);
}

static void serve(struct hthead *req, int fd)
{
    now = time(NULL);
    checkpath(req, fd, ".", req->rest, 1);
}

static void chldhandler(int sig)
{
    pid_t pid;
    int st;
    
    while((pid = waitpid(-1, &st, WNOHANG)) > 0) {
	if(WCOREDUMP(st))
	    flog(LOG_WARNING, "child process %i dumped core", pid);
    }
}

static void sighandler(int sig)
{
}

static void usage(FILE *out)
{
    fprintf(out, "usage: dirplex [-hN] [-c CONFIG] DIR\n");
}

int main(int argc, char **argv)
{
    int c;
    int nodef;
    char *gcf, *lcf, *clcf;
    struct hthead *req;
    int fd;
    
    nodef = 0;
    lcf = NULL;
    while((c = getopt(argc, argv, "hNc:")) >= 0) {
	switch(c) {
	case 'h':
	    usage(stdout);
	    exit(0);
	case 'N':
	    nodef = 1;
	    break;
	case 'c':
	    lcf = optarg;
	    break;
	default:
	    usage(stderr);
	    exit(1);
	}
    }
    if(argc - optind < 1) {
	usage(stderr);
	exit(1);
    }
    if(!nodef) {
	if((gcf = findstdconf("ashd/dirplex.rc")) != NULL) {
	    gconfig = readconfig(gcf);
	    free(gcf);
	}
    }
    if(lcf != NULL) {
	if(strchr(lcf, '/') == NULL) {
	    if((clcf = findstdconf(sprintf3("ashd/%s", lcf))) == NULL) {
		flog(LOG_ERR, "could not find requested configuration `%s'", lcf);
		exit(1);
	    }
	    if((lconfig = readconfig(clcf)) == NULL)
		exit(1);
	    free(clcf);
	} else {
	    if((lconfig = readconfig(lcf)) == NULL)
		exit(1);
	}
    }
    if(chdir(argv[optind])) {
	flog(LOG_ERR, "could not change directory to %s: %s", argv[optind], strerror(errno));
	exit(1);
    }
    signal(SIGCHLD, chldhandler);
    signal(SIGPIPE, sighandler);
    while(1) {
	if((fd = recvreq(0, &req)) < 0) {
	    if(errno != 0)
		flog(LOG_ERR, "recvreq: %s", strerror(errno));
	    break;
	}
	serve(req, fd);
	freehthead(req);
	close(fd);
    }
    return(0);
}
Commit	Line	Data
	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 <string.h>
	22	#include <unistd.h>
	23	#include <errno.h>
	24	#include <sys/stat.h>
	25	#include <ctype.h>
	26	#include <dirent.h>
	27	#include <time.h>
	28	#include <sys/wait.h>
	29	#include <sys/signal.h>
	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	#include <resp.h>
	39	#include <cf.h>
	40
	41	#include "dirplex.h"
	42
	43	time_t now;
	44
	45	static void chinit(void *idata)
	46	{
	47	char *twd = idata;
	48
	49	if(twd != NULL) {
	50	/* This should never be able to fail other than for critical
	51	* I/O errors or some such, since the path has already been
	52	* traversed. */
	53	if(chdir(twd))
	54	exit(127);
	55	}
	56	}
	57
	58	static void childerror(struct hthead *req, int fd)
	59	{
	60	if(errno == EAGAIN)
	61	simpleerror(fd, 500, "Server Error", "The request handler is overloaded.");
	62	else
	63	simpleerror(fd, 500, "Server Error", "The request handler crashed.");
	64	}
	65
	66	static void handle(struct hthead req, int fd, char path, struct pattern *pat)
	67	{
	68	struct child *ch;
	69	struct config *ccf;
	70	struct headmod *head;
	71	char *twd;
	72
	73	for(head = pat->headers; head != NULL; head = head->next) {
	74	headrmheader(req, head->name);
	75	headappheader(req, head->name, head->value);
	76	}
	77	if(!strncmp(path, "./", 2) && path[2])
	78	path += 2;
	79	if(pat->fchild) {
	80	headappheader(req, "X-Ash-File", path);
	81	stdforkserve(pat->fchild, req, fd, NULL, NULL);
	82	} else {
	83	if((ch = findchild(path, pat->childnm, &ccf)) == NULL) {
	84	flog(LOG_ERR, "child %s requested, but was not declared", pat->childnm);
	85	simpleerror(fd, 500, "Configuration Error", "The server is erroneously configured. Handler %s was requested, but not declared.", pat->childnm);
	86	return;
	87	}
	88	if((twd = ccf?ccf->path:NULL) != NULL) {
	89	if(!strcmp(twd, ".")) {
	90	twd = NULL;
	91	} else if(strncmp(path, twd, strlen(twd)) \|\| (path[strlen(twd)] != '/')) {
	92	/* Should be an impossible case under the current (and
	93	* foreseeable) scheme. */
	94	simpleerror(fd, 500, "Server Error", "An internal server error occurred.");
	95	return;
	96	} else {
	97	path = path + strlen(twd) + 1;
	98	}
	99	}
	100	headappheader(req, "X-Ash-File", path);
	101	if(childhandle(ch, req, fd, chinit, twd))
	102	childerror(req, fd);
	103	}
	104	}
	105
	106	static void handle404(struct hthead req, int fd, char path)
	107	{
	108	struct child *ch;
	109	struct config *ccf;
	110	struct pattern *pat;
	111
	112	char tmp[strlen(path) + 1];
	113	strcpy(tmp, path);
	114	if((pat = findmatch(tmp, 0, PT_NOTFOUND)) != NULL) {
	115	handle(req, fd, tmp, pat);
	116	} else {
	117	ch = findchild(tmp, ".notfound", &ccf);
	118	if(childhandle(ch, req, fd, chinit, ccf?ccf->path:NULL))
	119	childerror(req, fd);
	120	}
	121	}
	122
	123	static void handlefile(struct hthead req, int fd, char path)
	124	{
	125	struct pattern *pat;
	126
	127	if((pat = findmatch(path, 0, PT_FILE)) == NULL) {
	128	handle404(req, fd, path);
	129	return;
	130	}
	131	handle(req, fd, path, pat);
	132	}
	133
	134	static char findfile(char path, char name, struct stat sb)
	135	{
	136	DIR *dir;
	137	struct stat sbuf;
	138	struct dirent *dent;
	139	char p, fp, *ret;
	140
	141	if(sb == NULL)
	142	sb = &sbuf;
	143	if((dir = opendir(path)) == NULL)
	144	return(NULL);
	145	ret = NULL;
	146	while((dent = readdir(dir)) != NULL) {
	147	/* Ignore backup files.
	148	* XXX: There is probably a better and more extensible way to
	149	* do this. */
	150	if(dent->d_name[strlen(dent->d_name) - 1] == '~')
	151	continue;
	152	if((p = strchr(dent->d_name, '.')) == NULL)
	153	continue;
	154	if(p - dent->d_name != strlen(name))
	155	continue;
	156	if(strncmp(dent->d_name, name, strlen(name)))
	157	continue;
	158	fp = sprintf3("%s/%s", path, dent->d_name);
	159	if(stat(fp, sb))
	160	continue;
	161	if(!S_ISREG(sb->st_mode))
	162	continue;
	163	ret = sstrdup(fp);
	164	break;
	165	}
	166	closedir(dir);
	167	return(ret);
	168	}
	169
	170	static void handledir(struct hthead req, int fd, char path)
	171	{
	172	struct config **cfs;
	173	int i, o;
	174	struct stat sb;
	175	char inm, ipath, *cpath;
	176	struct pattern *pat;
	177
	178	cpath = sprintf2("%s/", path);
	179	cfs = getconfigs(cpath);
	180	for(i = 0; cfs[i] != NULL; i++) {
	181	if(cfs[i]->index != NULL) {
	182	for(o = 0; cfs[i]->index[o] != NULL; o++) {
	183	inm = cfs[i]->index[o];
	184	ipath = sprintf2("%s/%s", path, inm);
	185	if(!stat(ipath, &sb) && S_ISREG(sb.st_mode)) {
	186	handlefile(req, fd, ipath);
	187	free(ipath);
	188	goto out;
	189	}
	190	free(ipath);
	191
	192	if(!strchr(inm, '.') && ((ipath = findfile(path, inm, NULL)) != NULL)) {
	193	handlefile(req, fd, ipath);
	194	free(ipath);
	195	goto out;
	196	}
	197	}
	198	break;
	199	}
	200	}
	201	if((pat = findmatch(cpath, 0, PT_DIR)) != NULL) {
	202	handle(req, fd, cpath, pat);
	203	goto out;
	204	}
	205	simpleerror(fd, 403, "Not Authorized", "Will not send listings for this directory.");
	206
	207	out:
	208	free(cpath);
	209	}
	210
	211	static int checkpath(struct hthead req, int fd, char path, char *rest, int final);
	212
	213	static int checkentry(struct hthead req, int fd, char path, char rest, char el, int final)
	214	{
	215	struct stat sb;
	216	char *newpath;
	217	int rv;
	218
	219	if(*el == '.')
	220	return(0);
	221	if(!stat(sprintf3("%s/%s", path, el), &sb)) {
	222	if(S_ISDIR(sb.st_mode)) {
	223	if(!*rest) {
	224	stdredir(req, fd, 301, sprintf3("%s/", el));
	225	return(1);
	226	}
	227	newpath = sprintf2("%s/%s", path, el);
	228	rv = checkpath(req, fd, newpath, rest + 1, final);
	229	free(newpath);
	230	return(rv);
	231	} else if(S_ISREG(sb.st_mode)) {
	232	newpath = sprintf2("%s/%s", path, el);
	233	replrest(req, rest);
	234	handlefile(req, fd, newpath);
	235	free(newpath);
	236	return(1);
	237	}
	238	handle404(req, fd, sprintf3("%s/", path));
	239	return(1);
	240	}
	241	if(!strchr(el, '.') && ((newpath = findfile(path, el, NULL)) != NULL)) {
	242	replrest(req, rest);
	243	handlefile(req, fd, newpath);
	244	free(newpath);
	245	return(1);
	246	}
	247	return(0);
	248	}
	249
	250	static int checkdir(struct hthead req, int fd, char path, char *rest)
	251	{
	252	char *cpath;
	253	struct config cf, ccf;
	254	struct child *ch;
	255
	256	cf = getconfig(path);
	257	if((cf->capture != NULL) && (cf->caproot \|\| !cf->path \|\| strcmp(cf->path, "."))) {
	258	cpath = sprintf2("%s/", path);
	259	if((ch = findchild(cpath, cf->capture, &ccf)) == NULL) {
	260	free(cpath);
	261	flog(LOG_ERR, "child %s requested for capture, but was not declared", cf->capture);
	262	simpleerror(fd, 500, "Configuration Error", "The server is erroneously configured. Handler %s was requested, but not declared.", cf->capture);
	263	return(1);
	264	}
	265	free(cpath);
	266	if(*rest == '/')
	267	rest++;
	268	replrest(req, rest);
	269	if(childhandle(ch, req, fd, chinit, ccf?ccf->path:NULL))
	270	childerror(req, fd);
	271	return(1);
	272	}
	273	return(0);
	274	}
	275
	276	static int checkpath(struct hthead req, int fd, char path, char *rest, int final)
	277	{
	278	char p, el;
	279	int rv;
	280
	281	el = NULL;
	282	rv = 0;
	283
	284	if(!strncmp(path, "./", 2))
	285	path += 2;
	286	if(checkdir(req, fd, path, rest))
	287	return(1);
	288
	289	if((p = strchr(rest, '/')) == NULL) {
	290	el = unquoteurl(rest);
	291	rest = "";
	292	} else {
	293	char buf[p - rest + 1];
	294	memcpy(buf, rest, p - rest);
	295	buf[p - rest] = 0;
	296	el = unquoteurl(buf);
	297	rest = p;
	298	}
	299	if(el == NULL) {
	300	simpleerror(fd, 400, "Bad Request", "The requested URL contains an invalid escape sequence.");
	301	rv = 1;
	302	goto out;
	303	}
	304	if(strchr(el, '/') \|\| (!el && rest)) {
	305	rv = 0;
	306	goto out;
	307	}
	308	if(!*el) {
	309	replrest(req, rest);
	310	handledir(req, fd, path);
	311	rv = 1;
	312	goto out;
	313	}
	314	rv = checkentry(req, fd, path, rest, el, final);
	315
	316	out:
	317	if(final && !rv) {
	318	handle404(req, fd, sprintf3("%s/", path));
	319	rv = 1;
	320	}
	321	if(el != NULL)
	322	free(el);
	323	return(rv);
	324	}
	325
	326	static void serve(struct hthead *req, int fd)
	327	{
	328	now = time(NULL);
	329	checkpath(req, fd, ".", req->rest, 1);
	330	}
	331
	332	static void chldhandler(int sig)
	333	{
	334	pid_t pid;
	335	int st;
	336
	337	while((pid = waitpid(-1, &st, WNOHANG)) > 0) {
	338	if(WCOREDUMP(st))
	339	flog(LOG_WARNING, "child process %i dumped core", pid);
	340	}
	341	}
	342
	343	static void sighandler(int sig)
	344	{
	345	}
	346
	347	static void usage(FILE *out)
	348	{
	349	fprintf(out, "usage: dirplex [-hN] [-c CONFIG] DIR\n");
	350	}
	351
	352	int main(int argc, char **argv)
	353	{
	354	int c;
	355	int nodef;
	356	char gcf, lcf, *clcf;
	357	struct hthead *req;
	358	int fd;
	359
	360	nodef = 0;
	361	lcf = NULL;
	362	while((c = getopt(argc, argv, "hNc:")) >= 0) {
	363	switch(c) {
	364	case 'h':
	365	usage(stdout);
	366	exit(0);
	367	case 'N':
	368	nodef = 1;
	369	break;
	370	case 'c':
	371	lcf = optarg;
	372	break;
	373	default:
	374	usage(stderr);
	375	exit(1);
	376	}
	377	}
	378	if(argc - optind < 1) {
	379	usage(stderr);
	380	exit(1);
	381	}
	382	if(!nodef) {
	383	if((gcf = findstdconf("ashd/dirplex.rc")) != NULL) {
	384	gconfig = readconfig(gcf);
	385	free(gcf);
	386	}
	387	}
	388	if(lcf != NULL) {
	389	if(strchr(lcf, '/') == NULL) {
	390	if((clcf = findstdconf(sprintf3("ashd/%s", lcf))) == NULL) {
	391	flog(LOG_ERR, "could not find requested configuration `%s'", lcf);
	392	exit(1);
	393	}
	394	if((lconfig = readconfig(clcf)) == NULL)
	395	exit(1);
	396	free(clcf);
	397	} else {
	398	if((lconfig = readconfig(lcf)) == NULL)
	399	exit(1);
	400	}
	401	}
	402	if(chdir(argv[optind])) {
	403	flog(LOG_ERR, "could not change directory to %s: %s", argv[optind], strerror(errno));
	404	exit(1);
	405	}
	406	signal(SIGCHLD, chldhandler);
	407	signal(SIGPIPE, sighandler);
	408	while(1) {
	409	if((fd = recvreq(0, &req)) < 0) {
	410	if(errno != 0)
	411	flog(LOG_ERR, "recvreq: %s", strerror(errno));
	412	break;
	413	}
	414	serve(req, fd);
	415	freehthead(req);
	416	close(fd);
	417	}
	418	return(0);
	419	}