commit 00f0146a5c8c41ab32a75a5f553ab879b2412cb5
from: Russ Cox <rsc@swtch.com>
date: Tue Nov 09 15:52:41 2010 UTC

venti: add mgr (work in progress)

R=rsc
http://codereview.appspot.com/3003041

commit - dc6625ea01a804a53bc946da70456a6252bfd2fc
commit + 00f0146a5c8c41ab32a75a5f553ab879b2412cb5
blob - /dev/null
blob + 96cafda59ece7f1c663c731180f41d548d30215d (mode 644)
--- /dev/null
+++ src/cmd/venti/srv/mgr.c
@@ -0,0 +1,1021 @@
+/*
+ * mirror manager.
+ * a work in progress.
+ * use at your own risk.
+ */
+
+#include "stdinc.h"
+#include <regexp.h>
+#include <bio.h>
+#include "dat.h"
+#include "fns.h"
+
+void sendmail(char *content, char *subject, char *msg);
+#define TIME "[0-9]+/[0-9]+ [0-9]+:[0-9]+:[0-9]+"
+
+char *mirrorregexp =
+	"^" TIME " ("
+		"([^ ]+ \\([0-9,]+-[0-9,]+\\))"
+		"|(  copy [0-9,]+-[0-9,]+ (data|hole|directory|tail))"
+		"|(  sha1 [0-9,]+-[0-9,]+)"
+		"|([^ \\-]+-[^ \\-]+( mirrored| sealed| empty)+)"
+	")$";
+Reprog *mirrorprog;
+
+#undef pipe
+enum
+{
+	LogSize = 4*1024*1024	// TODO: make smaller
+};
+
+VtLog *errlog;
+
+typedef struct Mirror Mirror;
+struct Mirror
+{
+	char *src;
+	char *dst;
+};
+
+typedef struct Conf Conf;
+struct Conf
+{
+	Mirror *mirror;
+	int nmirror;
+	char **verify;
+	int nverify;
+	char *httpaddr;
+	char *webroot;
+	char *smtp;
+	char *mailfrom;
+	char *mailto;
+	int mirrorfreq;
+	int verifyfreq;
+};
+
+typedef struct Job Job;
+struct Job
+{
+	char *name;
+	QLock lk;
+	char *argv[10];
+	int oldok;
+	int newok;
+	VtLog *oldlog;
+	VtLog *newlog;
+	int pid;
+	int pipe;
+	int nrun;
+	vlong freq;
+	vlong runstart;
+	vlong runend;
+	double offset;
+	int (*ok)(char*);
+};
+
+Job *job;
+int njob;
+char *bin;
+
+vlong time0;
+Conf conf;
+
+void
+usage(void)
+{
+	fprint(2, "usage: mgr [-s] [-b bin/venti/] venti.conf\n");
+	threadexitsall(0);
+}
+
+int
+rdconf(char *file, Conf *conf)
+{
+	char *s, *line, *flds[10];
+	int i, ok;
+	IFile f;
+	
+	if(readifile(&f, file) < 0)
+		return -1;
+	memset(conf, 0, sizeof *conf);
+	ok = -1;
+	line = nil;
+	s = nil;
+	for(;;){
+		s = ifileline(&f);
+		if(s == nil){
+			ok = 0;
+			break;
+		}
+		line = estrdup(s);
+		i = getfields(s, flds, nelem(flds), 1, " \t\r");
+		if(i <= 0 || strcmp(flds[0], "mgr") != 0) {
+			/* do nothing */
+		}else if(i == 4 && strcmp(flds[1], "mirror") == 0) {
+			if(conf->nmirror%64 == 0)
+				conf->mirror = vtrealloc(conf->mirror, (conf->nmirror+64)*sizeof(conf->mirror[0]));
+			conf->mirror[conf->nmirror].src = vtstrdup(flds[2]);
+			conf->mirror[conf->nmirror].dst = vtstrdup(flds[3]);
+			conf->nmirror++;
+		}else if(i == 3 && strcmp(flds[1], "mirrorfreq") == 0) {
+			conf->mirrorfreq = atoi(flds[2]);
+		}else if(i == 3 && strcmp(flds[1], "verify") == 0) {
+			if(conf->nverify%64 == 0)
+				conf->verify = vtrealloc(conf->verify, (conf->nverify+64)*sizeof(conf->verify[0]));
+			conf->verify[conf->nverify++] = vtstrdup(flds[2]);	
+		}else if(i == 3 && strcmp(flds[1], "verifyfreq") == 0) {
+			conf->verifyfreq = atoi(flds[2]);
+		}else if(i == 3 && strcmp(flds[1], "httpaddr") == 0){
+			if(conf->httpaddr){
+				seterr(EAdmin, "duplicate httpaddr lines in configuration file %s", file);
+				break;
+			}
+			conf->httpaddr = estrdup(flds[2]);
+		}else if(i == 3 && strcmp(flds[1], "webroot") == 0){
+			if(conf->webroot){
+				seterr(EAdmin, "duplicate webroot lines in configuration file %s", file);
+				break;
+			}
+			conf->webroot = estrdup(flds[2]);
+		}else if(i == 3 && strcmp(flds[1], "smtp") == 0) {
+			if(conf->smtp){
+				seterr(EAdmin, "duplicate smtp lines in configuration file %s", file);
+				break;
+			}
+			conf->smtp = estrdup(flds[2]);
+		}else if(i == 3 && strcmp(flds[1], "mailfrom") == 0) {
+			if(conf->mailfrom){
+				seterr(EAdmin, "duplicate mailfrom lines in configuration file %s", file);
+				break;
+			}
+			conf->mailfrom = estrdup(flds[2]);
+		}else if(i == 3 && strcmp(flds[1], "mailto") == 0) {
+			if(conf->mailto){
+				seterr(EAdmin, "duplicate mailto lines in configuration file %s", file);
+				break;
+			}
+			conf->mailto = estrdup(flds[2]);
+		}else{
+			seterr(EAdmin, "illegal line '%s' in configuration file %s", line, file);
+			break;
+		}
+		free(line);
+		line = nil;
+	}
+	free(line);
+	freeifile(&f);
+	return ok;
+}
+
+static QLock loglk;
+static char *logbuf;
+
+char*
+logtext(VtLog *l)
+{
+	int i;
+	char *p;
+	VtLogChunk *c;
+	
+	p = logbuf;
+	c = l->w;
+	for(i=0; i<l->nchunk; i++) {
+		if(++c == l->chunk+l->nchunk)
+			c = l->chunk;
+		memmove(p, c->p, c->wp - c->p);
+		p += c->wp - c->p;
+	}
+	*p = 0;
+	return logbuf;
+}
+
+
+typedef struct HttpObj	HttpObj;
+
+static int fromwebdir(HConnect*);
+
+enum
+{
+	ObjNameSize	= 64,
+	MaxObjs		= 64
+};
+
+struct HttpObj
+{
+	char	name[ObjNameSize];
+	int	(*f)(HConnect*);
+};
+
+static HttpObj	objs[MaxObjs];
+static void httpproc(void*);
+
+static HConnect*
+mkconnect(void)
+{
+	HConnect *c;
+
+	c = mallocz(sizeof(HConnect), 1);
+	if(c == nil)
+		sysfatal("out of memory");
+	c->replog = nil;
+	c->hpos = c->header;
+	c->hstop = c->header;
+	return c;
+}
+
+static int
+preq(HConnect *c)
+{
+	if(hparseheaders(c, 0) < 0)
+		return -1;
+	if(strcmp(c->req.meth, "GET") != 0
+	&& strcmp(c->req.meth, "HEAD") != 0)
+		return hunallowed(c, "GET, HEAD");
+	if(c->head.expectother || c->head.expectcont)
+		return hfail(c, HExpectFail, nil);
+	return 0;
+}
+
+int
+hsettype(HConnect *c, char *type)
+{
+	Hio *hout;
+	int r;
+
+	r = preq(c);
+	if(r < 0)
+		return r;
+
+	hout = &c->hout;
+	if(c->req.vermaj){
+		hokheaders(c);
+		hprint(hout, "Content-type: %s\r\n", type);
+		if(http11(c))
+			hprint(hout, "Transfer-Encoding: chunked\r\n");
+		hprint(hout, "\r\n");
+	}
+
+	if(http11(c))
+		hxferenc(hout, 1);
+	else
+		c->head.closeit = 1;
+	return 0;
+}
+
+int
+hsethtml(HConnect *c)
+{
+	return hsettype(c, "text/html; charset=utf-8");
+}
+
+int
+hsettext(HConnect *c)
+{
+	return hsettype(c, "text/plain; charset=utf-8");
+}
+
+static int
+herror(HConnect *c)
+{
+	int n;
+	Hio *hout;
+	
+	hout = &c->hout;
+	n = snprint(c->xferbuf, HBufSize, "<html><head><title>Error</title></head>\n<body><h1>Error</h1>\n<pre>%r</pre>\n</body></html>");
+	hprint(hout, "%s %s\r\n", hversion, "400 Bad Request");
+	hprint(hout, "Date: %D\r\n", time(nil));
+	hprint(hout, "Server: Venti\r\n");
+	hprint(hout, "Content-Type: text/html\r\n");
+	hprint(hout, "Content-Length: %d\r\n", n);
+	if(c->head.closeit)
+		hprint(hout, "Connection: close\r\n");
+	else if(!http11(c))
+		hprint(hout, "Connection: Keep-Alive\r\n");
+	hprint(hout, "\r\n");
+
+	if(c->req.meth == nil || strcmp(c->req.meth, "HEAD") != 0)
+		hwrite(hout, c->xferbuf, n);
+
+	return hflush(hout);
+}
+	
+int
+hnotfound(HConnect *c)
+{
+	int r;
+
+	r = preq(c);
+	if(r < 0)
+		return r;
+	return hfail(c, HNotFound, c->req.uri);
+}
+
+static int
+xloglist(HConnect *c)
+{
+	if(hsettype(c, "text/html") < 0)
+		return -1;
+	vtloghlist(&c->hout);
+	hflush(&c->hout);
+	return 0;
+}
+
+static int
+strpcmp(const void *va, const void *vb)
+{
+	return strcmp(*(char**)va, *(char**)vb);
+}
+
+void
+vtloghlist(Hio *h)
+{
+	char **p;
+	int i, n;
+	
+	hprint(h, "<html><head>\n");
+	hprint(h, "<title>Venti Server Logs</title>\n");
+	hprint(h, "</head><body>\n");
+	hprint(h, "<b>Venti Server Logs</b>\n<p>\n");
+	
+	p = vtlognames(&n);
+	qsort(p, n, sizeof(p[0]), strpcmp);
+	for(i=0; i<n; i++)
+		hprint(h, "<a href=\"/log?log=%s\">%s</a><br>\n", p[i], p[i]);
+	vtfree(p);
+	hprint(h, "</body></html>\n");
+}
+
+void
+vtloghdump(Hio *h, VtLog *l)
+{
+	int i;
+	VtLogChunk *c;
+	char *name;
+	
+	name = l ? l->name : "&lt;nil&gt;";
+
+	hprint(h, "<html><head>\n");
+	hprint(h, "<title>Venti Server Log: %s</title>\n", name);
+	hprint(h, "</head><body>\n");
+	hprint(h, "<b>Venti Server Log: %s</b>\n<p>\n", name);
+	
+	if(l){
+		c = l->w;
+		for(i=0; i<l->nchunk; i++){
+			if(++c == l->chunk+l->nchunk)
+				c = l->chunk;
+			hwrite(h, c->p, c->wp-c->p);
+		}
+	}
+	hprint(h, "</body></html>\n");
+}
+
+
+char*
+hargstr(HConnect *c, char *name, char *def)
+{
+	HSPairs *p;
+	
+	for(p=c->req.searchpairs; p; p=p->next)
+		if(strcmp(p->s, name) == 0)
+			return p->t;
+	return def;
+}
+
+static int
+xlog(HConnect *c)
+{
+	char *name;
+	VtLog *l;
+
+	name = hargstr(c, "log", "");
+	if(!name[0])
+		return xloglist(c);
+	l = vtlogopen(name, 0);
+	if(l == nil)
+		return hnotfound(c);
+	if(hsettype(c, "text/html") < 0){
+		vtlogclose(l);
+		return -1;
+	}
+	vtloghdump(&c->hout, l);
+	vtlogclose(l);
+	hflush(&c->hout);
+	return 0;
+}
+
+static void
+httpdproc(void *vaddress)
+{
+	HConnect *c;
+	char *address, ndir[NETPATHLEN], dir[NETPATHLEN];
+	int ctl, nctl, data;
+
+	address = vaddress;
+	ctl = announce(address, dir);
+	if(ctl < 0){
+		sysfatal("announce %s: %r", address);
+		return;
+	}
+
+	if(0) print("announce ctl %d dir %s\n", ctl, dir);
+	for(;;){
+		/*
+		 *  wait for a call (or an error)
+		 */
+		nctl = listen(dir, ndir);
+		if(0) print("httpd listen %d %s...\n", nctl, ndir);
+		if(nctl < 0){
+			fprint(2, "mgr: httpd can't listen on %s: %r\n", address);
+			return;
+		}
+
+		data = accept(ctl, ndir);
+		if(0) print("httpd accept %d...\n", data);
+		if(data < 0){
+			fprint(2, "mgr: httpd accept: %r\n");
+			close(nctl);
+			continue;
+		}
+		if(0) print("httpd close nctl %d\n", nctl);
+		close(nctl);
+		c = mkconnect();
+		hinit(&c->hin, data, Hread);
+		hinit(&c->hout, data, Hwrite);
+		vtproc(httpproc, c);
+	}
+}
+
+void
+httpproc(void *v)
+{
+	HConnect *c;
+	int ok, i, n;
+
+	c = v;
+
+	for(;;){
+		/*
+		 * No timeout because the signal appears to hit every
+		 * proc, not just us.
+		 */
+		if(hparsereq(c, 0) < 0)
+			break;
+		
+		for(i = 0; i < MaxObjs && objs[i].name[0]; i++){
+			n = strlen(objs[i].name);
+			if((objs[i].name[n-1] == '/' && strncmp(c->req.uri, objs[i].name, n) == 0)
+			|| (objs[i].name[n-1] != '/' && strcmp(c->req.uri, objs[i].name) == 0)){
+				ok = (*objs[i].f)(c);
+				goto found;
+			}
+		}
+		ok = fromwebdir(c);
+	found:
+		hflush(&c->hout);
+		if(c->head.closeit)
+			ok = -1;
+		hreqcleanup(c);
+
+		if(ok < 0)
+			break;
+	}
+	hreqcleanup(c);
+	close(c->hin.fd);
+	free(c);
+}
+
+static int
+httpdobj(char *name, int (*f)(HConnect*))
+{
+	int i;
+
+	if(name == nil || strlen(name) >= ObjNameSize)
+		return -1;
+	for(i = 0; i < MaxObjs; i++){
+		if(objs[i].name[0] == '\0'){
+			strcpy(objs[i].name, name);
+			objs[i].f = f;
+			return 0;
+		}
+		if(strcmp(objs[i].name, name) == 0)
+			return -1;
+	}
+	return -1;
+}
+
+
+struct {
+	char *ext;
+	char *type;
+} exttab[] = {
+	".html",	"text/html",
+	".txt",	"text/plain",
+	".xml",	"text/xml",
+	".png",	"image/png",
+	".gif",	"image/gif",
+	0
+};
+
+static int
+fromwebdir(HConnect *c)
+{
+	char buf[4096], *p, *ext, *type;
+	int i, fd, n, defaulted;
+	Dir *d;
+	
+	if(conf.webroot == nil || strstr(c->req.uri, ".."))
+		return hnotfound(c);
+	snprint(buf, sizeof buf-20, "%s/%s", conf.webroot, c->req.uri+1);
+	defaulted = 0;
+reopen:
+	if((fd = open(buf, OREAD)) < 0)
+		return hnotfound(c);
+	d = dirfstat(fd);
+	if(d == nil){
+		close(fd);
+		return hnotfound(c);
+	}
+	if(d->mode&DMDIR){
+		if(!defaulted){
+			defaulted = 1;
+			strcat(buf, "/index.html");
+			free(d);
+			close(fd);
+			goto reopen;
+		}
+		free(d);
+		return hnotfound(c);
+	}
+	free(d);
+	p = buf+strlen(buf);
+	type = "application/octet-stream";
+	for(i=0; exttab[i].ext; i++){
+		ext = exttab[i].ext;
+		if(p-strlen(ext) >= buf && strcmp(p-strlen(ext), ext) == 0){
+			type = exttab[i].type;
+			break;
+		}
+	}
+	if(hsettype(c, type) < 0){
+		close(fd);
+		return 0;
+	}
+	while((n = read(fd, buf, sizeof buf)) > 0)
+		if(hwrite(&c->hout, buf, n) < 0)
+			break;
+	close(fd);
+	hflush(&c->hout);
+	return 0;
+}
+
+static int
+hmanager(HConnect *c)
+{
+	Hio *hout;
+	int r;
+	int i, k;
+	Job *j;
+	vlong now;
+	VtLog *l;
+	VtLogChunk *ch;
+	
+	now = time(0) - time0;
+
+	r = hsethtml(c);
+	if(r < 0)
+		return r;
+
+	hout = &c->hout;
+	hprint(hout, "<html><head><title>venti mgr status</title></head>\n");
+	hprint(hout, "<body><h2>venti mgr status</h2>\n");
+
+	for(i=0; i<njob; i++) {
+		j = &job[i];
+		hprint(hout, "<b>");
+		if(j->nrun == 0)
+			hprint(hout, "----/--/-- --:--:--");
+		else
+			hprint(hout, "%+T", (long)(j->runstart + time0));
+		hprint(hout, " %s", j->name);
+		if(j->nrun > 0) {
+			if(j->newok == -1) {
+				hprint(hout, " (running)");
+			} else if(!j->newok) {
+				hprint(hout, " <font color=\"#cc0000\">(FAILED)</font>");
+			}
+		}
+		hprint(hout, "</b>\n");
+		hprint(hout, "<font size=-1><pre>\n");
+		l = j->newlog;
+		ch = l->w;
+		for(k=0; k<l->nchunk; k++){
+			if(++ch == l->chunk+l->nchunk)
+				ch = l->chunk;
+			hwrite(hout, ch->p, ch->wp-ch->p);
+		}
+		hprint(hout, "</pre></font>\n");
+		hprint(hout, "\n");
+	}
+	hprint(hout, "</body></html>\n");
+	hflush(hout);
+	return 0;
+}
+
+void
+piper(void *v)
+{
+	Job *j;
+	char buf[512];
+	VtLog *l;
+	int n;
+	int fd;
+	char *p;
+	int ok;
+	
+	j = v;
+	fd = j->pipe;
+	l = j->newlog;
+	while((n = read(fd, buf, 512-1)) > 0) {
+		buf[n] = 0;
+		if(l != nil)
+			vtlogprint(l, "%s", buf);
+	}
+	qlock(&loglk);
+	p = logtext(l);
+	ok = j->ok(p);	
+	qunlock(&loglk);
+	j->newok = ok;
+	close(fd);
+}
+
+void
+kickjob(Job *j)
+{
+	int i;
+	int fd[3];
+	int p[2];
+	VtLog *l;
+
+	if((fd[0] = open("/dev/null", ORDWR)) < 0) {
+		vtlogprint(errlog, "%T open /dev/null: %r\n");
+		return;
+	}
+	if(pipe(p) < 0) {
+		vtlogprint(errlog, "%T pipe: %r\n");
+		close(fd[0]);
+		return;
+	}
+	qlock(&j->lk);
+	l = j->oldlog;
+	j->oldlog = j->newlog;
+	j->newlog = l;
+	qlock(&l->lk);
+	for(i=0; i<l->nchunk; i++)
+		l->chunk[i].wp = l->chunk[i].p;
+	qunlock(&l->lk);
+	j->oldok = j->newok;
+	j->newok = -1;
+	qunlock(&j->lk);
+
+	fd[1] = p[1];
+	fd[2] = p[1];
+	j->pid = threadspawn(fd, j->argv[0], j->argv);
+	if(j->pid < 0) {
+		vtlogprint(errlog, "%T exec %s: %r\n", j->argv[0]);
+		close(fd[0]);
+		close(fd[1]);
+		close(p[0]);
+	}
+	// fd[0], fd[1], fd[2] are closed now
+	j->pipe = p[0];
+	j->nrun++;
+	vtproc(piper, j);
+}
+
+int
+verifyok(char *output)
+{
+	return strlen(output) == 0;
+}
+
+int
+getline(Resub *text, Resub *line)
+{
+	char *p;
+
+	if(text->s.sp >= text->e.ep)
+		return -1;
+	line->s.sp = text->s.sp;
+	p = memchr(text->s.sp, '\n', text->e.ep - text->s.sp);
+	if(p == nil) {
+		line->e.ep = text->e.ep;
+		text->s.sp = text->e.ep;
+	} else {
+		line->e.ep = p;
+		text->s.sp = p+1;
+	}
+	return 0;		
+}
+
+int
+mirrorok(char *output)
+{
+	Resub text, line, m;
+
+	text.s.sp = output;
+	text.e.ep = output+strlen(output);
+	while(getline(&text, &line) >= 0) {
+		*line.e.ep = 0;
+		memset(&m, 0, sizeof m);
+		if(!regexec(mirrorprog, line.s.sp, nil, 0))
+			return 0;
+		*line.e.ep = '\n';
+	}
+	return 1;
+}
+
+void
+mkjob(Job *j, ...)
+{
+	int i;
+	char *p;
+	va_list arg;
+
+	memset(j, 0, sizeof *j);
+	i = 0;
+	va_start(arg, j);
+	while((p = va_arg(arg, char*)) != nil) {
+		j->argv[i++] = p;
+		if(i >= nelem(j->argv))
+			sysfatal("job argv size too small");
+	}
+	j->argv[i] = nil;
+	j->oldlog = vtlogopen(smprint("log%d.0", j-job), LogSize);
+	j->newlog = vtlogopen(smprint("log%d.1", j-job), LogSize);
+	va_end(arg);
+}
+
+void
+manager(void *v)
+{
+	int i;
+	Job *j;
+	vlong now;
+
+	for(;; sleep(1000)) {
+		for(i=0; i<njob; i++) {
+			now = time(0) - time0;
+			j = &job[i];
+			if(j->pid > 0 || j->newok == -1) {
+				// still running
+				if(now - j->runstart > 2*j->freq) {
+					//TODO: log slow running j
+				}
+				continue;
+			}
+			if((j->nrun > 0 && now - j->runend > j->freq)
+			|| (j->nrun == 0 && now > (vlong)(j->offset*j->freq))) {
+				j->runstart = now;
+				j->runend = 0;
+				kickjob(j);
+			}
+		}
+	}
+}
+
+void
+waitproc(void *v)
+{
+	Channel *c;
+	Waitmsg *w;
+	int i;
+	Job *j;
+
+	c = v;
+	for(;;) {
+		w = recvp(c);
+		for(i=0; i<njob; i++) {
+			j = &job[i];
+			if(j->pid == w->pid) {
+				j->pid = 0;
+				j->runend = time(0) - time0;
+				break;
+			}
+		}
+		free(w);
+	}
+}
+
+void
+threadmain(int argc, char **argv)
+{
+	int i;
+	int nofork;
+	char *prog;
+	Job *j;
+	
+	ventilogging = 1;
+	ventifmtinstall();
+	bin = unsharp("#9/bin/venti");
+	nofork = 0;
+	ARGBEGIN{
+	case 'b':
+		bin = EARGF(usage());
+		break;
+	case 's':
+		nofork = 1;
+		break;
+	default:
+		usage();
+	}ARGEND
+
+	if(argc != 1)
+		usage();
+	if(rdconf(argv[0], &conf) < 0)
+		sysfatal("reading config: %r");
+	if(conf.httpaddr == nil)
+		sysfatal("config has no httpaddr");
+	if(conf.smtp != nil && conf.mailfrom == nil)
+		sysfatal("config has smtp but no mailfrom");
+	if(conf.smtp != nil && conf.mailto == nil)
+		sysfatal("config has smtp but no mailto");
+	if((mirrorprog = regcomp(mirrorregexp)) == nil)
+		sysfatal("mirrorregexp did not comple");
+	if(conf.nverify > 0 && conf.verifyfreq == 0)
+		sysfatal("config has no verifyfreq");
+	if(conf.nmirror > 0 && conf.mirrorfreq == 0)
+		sysfatal("config has no mirrorfreq");
+
+	time0 = time(0);
+//	sendmail("startup", "mgr is starting\n");
+
+	logbuf = vtmalloc(LogSize+1);	// +1 for NUL
+
+	errlog = vtlogopen("errors", LogSize);
+	job = vtmalloc((conf.nmirror+conf.nverify)*sizeof job[0]);
+	prog = smprint("%s/mirrorarenas", bin);
+	for(i=0; i<conf.nmirror; i++) {
+		// job: /bin/venti/mirrorarenas -v src dst
+		// filter output
+		j = &job[njob++];
+		mkjob(j, prog, "-v", conf.mirror[i].src, conf.mirror[i].dst);
+		j->name = smprint("mirror %s %s", conf.mirror[i].src, conf.mirror[i].dst);
+		j->ok = mirrorok;
+		j->freq = conf.mirrorfreq;	// 4 hours	// TODO: put in config
+		j->offset = (double)i/conf.nmirror;
+	}
+
+	prog = smprint("%s/verifyarena", bin);
+	for(i=0; i<conf.nverify; i++) {
+		// job: /bin/venti/verifyarena -b 64M -s 1000 -v arena
+		// filter output
+		j = &job[njob++];
+		mkjob(j, prog, "-b64M", "-s1000", conf.verify[i]);
+		j->name = smprint("verify %s", conf.verify[i]);
+		j->ok = verifyok;
+		j->freq = conf.verifyfreq;
+		j->offset = (double)i/conf.nverify;
+	}
+
+	httpdobj("/mgr", hmanager);
+	httpdobj("/log", xlog);
+	vtproc(httpdproc, conf.httpaddr);
+	vtproc(waitproc, threadwaitchan());
+	if(nofork)
+		manager(nil);
+	else
+		vtproc(manager, nil);
+}
+
+
+void
+qp(Biobuf *b, char *p)
+{
+	int n, nspace;
+	
+	nspace = 0;	
+	n = 0;
+	for(; *p; p++) {
+		if(*p == '\n') {
+			if(nspace > 0) {
+				nspace = 0;
+				Bprint(b, "=\n");
+			}
+			Bputc(b, '\n');
+			n = 0;
+			continue;
+		}
+		if(n > 70) {
+			Bprint(b, "=\n");
+			nspace = 0;
+			continue;
+		}
+		if(33 <= *p && *p <= 126 && *p != '=') {
+			Bputc(b, *p);
+			n++;
+			nspace = 0;
+			continue;
+		}
+		if(*p == ' ' || *p == '\t') {
+			Bputc(b, *p);
+			n++;
+			nspace++;
+			continue;
+		}
+		Bprint(b, "=%02X", (uchar)*p);
+		n += 3;
+		nspace = 0;
+	}
+}
+
+int
+smtpread(Biobuf *b, int code)
+{
+	char *p, *q;
+	int n;
+	
+	while((p = Brdstr(b, '\n', 1)) != nil) {
+		n = strtol(p, &q, 10);
+		if(n == 0 || q != p+3) {
+		error:
+			vtlogprint(errlog, "sending mail: %s\n", p);
+			free(p);
+			return -1;
+		}
+		if(*q == ' ') {
+			if(n == code) {
+				free(p);
+				return 0;
+			}
+			goto error;
+		}
+		if(*q != '-') {
+			goto error;
+		}
+	}
+	return -1;
+}
+
+		
+void
+sendmail(char *content, char *subject, char *msg)
+{
+	int fd;
+	Biobuf *bin, *bout;
+	
+	if((fd = dial(conf.smtp, 0, 0, 0)) < 0) {
+		vtlogprint(errlog, "dial %s: %r\n", conf.smtp);
+		return;
+	}
+	bin = vtmalloc(sizeof *bin);
+	bout = vtmalloc(sizeof *bout);
+	Binit(bin, fd, OREAD);
+	Binit(bout, fd, OWRITE);
+	if(smtpread(bin, 220) < 0){
+	error:
+		close(fd);
+		Bterm(bin);
+		Bterm(bout);
+		return;
+	}
+	
+	Bprint(bout, "HELO venti-mgr\n");
+	Bflush(bout);
+	if(smtpread(bin, 250) < 0)
+		goto error;
+
+	Bprint(bout, "MAIL FROM:<%s>\n", conf.mailfrom);
+	Bflush(bout);
+	if(smtpread(bin, 250) < 0)
+		goto error;
+
+	Bprint(bout, "RCPT TO:<%s>\n", conf.mailfrom);
+	Bflush(bout);
+	if(smtpread(bin, 250) < 0)
+		goto error;
+	
+	Bprint(bout, "DATA\n");
+	Bflush(bout);
+	if(smtpread(bin, 354) < 0)
+		goto error;
+	
+	Bprint(bout, "From: \"venti mgr\" <%s>\n", conf.mailfrom);
+	Bprint(bout, "To: <%s>\n", conf.mailto);
+	Bprint(bout, "Subject: %s\n", subject);
+	Bprint(bout, "MIME-Version: 1.0\n");
+	Bprint(bout, "Content-Type: %s; charset=\"UTF-8\"\n", content);
+	Bprint(bout, "Content-Transfer-Encoding: quoted-printable\n");
+	Bprint(bout, "Message-ID: %08llux%08llux@venti.swtch.com\n", fastrand(), fastrand());
+	Bprint(bout, "\n");
+	qp(bout, msg);
+	Bprint(bout, ".\n");
+	Bflush(bout);
+	if(smtpread(bin, 250) < 0)
+		goto error;
+	
+	Bprint(bout, "QUIT\n");
+	Bflush(bout);
+	Bterm(bin);
+	Bterm(bout);
+	close(fd);
+}