Re: bin/60229: bozohttpd: fails to print actual port number with `-I 0'

["Sunil Nimmagadda via gnats" <gnats-admin%NetBSD.org@localhost>]

The following reply was made to PR bin/60229; it has been noted by GNATS.

From: Sunil Nimmagadda <sunil%nimmagadda.net@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: gnats-admin%netbsd.org@localhost, netbsd-bugs%netbsd.org@localhost
Subject: Re: bin/60229: bozohttpd: fails to print actual port number with
 `-I 0'
Date: Tue, 05 May 2026 16:03:17 +0530

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 Content-Type: text/plain
 
 "campbell+netbsd%mumble.net@localhost via gnats" <gnats-admin%NetBSD.org@localhost> writes:
 
 >>Number:         60229
 >>Category:       bin
 >>Synopsis:       bozohttpd: fails to print actual port number with `-I 0'
 >>Confidential:   no
 >>Severity:       serious
 >>Priority:       medium
 >>Responsible:    bin-bug-people
 >>State:          open
 >>Class:          sw-bug
 >>Submitter-Id:   net
 >>Arrival-Date:   Mon May 04 20:50:00 +0000 2026
 >>Originator:     Taylor R Campbell
 >>Release:        current, 11, 10, 9, ...
 >>Organization:
 > The NetBozod Localhost, Inc.
 >>Environment:
 >>Description:
 > $ /usr/libexec/httpd -b -f -s -i localhost -I 0 -X . localhost
 > started in daemon mode as `localhost' port `0' root `.'
 >
 > This is not helpful: I want the port number the OS chose.
 >
 > (Reliable machine-parseable output would be nice too.)
 >>How-To-Repeat:
 > as above
 >>Fix:
 > getsockname
 
 This patch prints the numerical host and port upon listen(2)...
 
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 Content-Type: text/x-patch
 Content-Disposition: inline; filename=bozohttpd.diff
 Content-Description: bozohttpd: print ephemeral port chosen by OS
 
 diff --git a/libexec/httpd/daemon-bozo.c b/libexec/httpd/daemon-bozo.c
 index 64483d07c986..a1b741af84fa 100644
 --- a/libexec/httpd/daemon-bozo.c
 +++ b/libexec/httpd/daemon-bozo.c
 @@ -125,8 +125,11 @@ create_pidfile(bozohttpd_t *httpd)
  void
  bozo_daemon_init(bozohttpd_t *httpd)
  {
 +	struct sockaddr_storage ss;
  	struct addrinfo h, *r, *r0;
 +	char host[NI_MAXHOST], port[NI_MAXSERV];
  	const char	*portnum;
 +	socklen_t slen;
  	int e, i, on = 1;
  
  	if (!httpd->background && !httpd->foreground)
 @@ -137,6 +140,7 @@ bozo_daemon_init(bozohttpd_t *httpd)
  
  	portnum = httpd->bindport ? httpd->bindport : httpd->defbindport;
  	
 +	slen = sizeof(ss);
  	memset(&h, 0, sizeof(h));
  	h.ai_family = PF_UNSPEC;
  	h.ai_socktype = SOCK_STREAM;
 @@ -162,6 +166,14 @@ bozo_daemon_init(bozohttpd_t *httpd)
  			continue;
  		if (listen(httpd->sock[i], SOMAXCONN) == -1)
  			continue;
 +		memset(&ss, 0, slen);
 +		if (getsockname(httpd->sock[i], (struct sockaddr *)(void *)&ss,
 +		    &slen) == 0 &&
 +		    getnameinfo((struct sockaddr *)&ss, slen,
 +		        host, sizeof(host), port, sizeof(port),
 +			NI_NUMERICHOST | NI_NUMERICSERV) == 0)
 +			bozowarn(httpd, "listening on host: %s port: %s",
 +			    host, port);
  		httpd->fds[i].events = POLLIN | POLLPRI | POLLRDNORM |
  				POLLRDBAND | POLLERR;
  		httpd->fds[i].fd = httpd->sock[i];
 
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