git: 041065e59eae - stable/14 - lpd: Add timeout option

The branch stable/14 has been updated by des:

URL: https://cgit.FreeBSD.org/src/commit/?id=041065e59eae8af5fa3ae676416eff65d90158e5

commit 041065e59eae8af5fa3ae676416eff65d90158e5
Author:     Dag-Erling Smørgrav <des@FreeBSD.org>
AuthorDate: 2026-02-26 06:15:14 +0000
Commit:     Dag-Erling Smørgrav <des@FreeBSD.org>
CommitDate: 2026-03-04 14:45:09 +0000

    lpd: Add timeout option
    
    Set a 120-second receive timeout on all client connections, and add a
    command-line option to change that value.
    
    MFC after:      1 week
    Reviewed by:    markj
    Differential Revision:  https://reviews.freebsd.org/D55400
    
    (cherry picked from commit 56fbfd1ecdc78fc99b3a2e381c355ce8980de39d)
---
 usr.sbin/lpr/lpd/lpd.8 |  8 +++++++-
 usr.sbin/lpr/lpd/lpd.c | 30 +++++++++++++++++++-----------
 2 files changed, 26 insertions(+), 12 deletions(-)

diff --git a/usr.sbin/lpr/lpd/lpd.8 b/usr.sbin/lpr/lpd/lpd.8
index f3b78d9d4d11..97f1acb23032 100644
--- a/usr.sbin/lpr/lpd/lpd.8
+++ b/usr.sbin/lpr/lpd/lpd.8
@@ -27,7 +27,7 @@
 .\"
 .\"     @(#)lpd.8	8.3 (Berkeley) 4/19/94
 .\"
-.Dd April 15, 2021
+.Dd February 19, 2026
 .Dt LPD 8
 .Os
 .Sh NAME
@@ -36,6 +36,7 @@
 .Sh SYNOPSIS
 .Nm
 .Op Fl cdlpsFW46
+.Op Fl t Ar timeout
 .Op Ar port#
 .Sh DESCRIPTION
 The
@@ -107,6 +108,11 @@ This means that
 will not accept any connections from any remote
 hosts, although it will still accept print requests
 from all local users.
+.It Fl t Ar timeout
+Set the network receive timeout for client connections to
+.Ar timeout
+seconds.
+The default is 120.
 .It Fl F
 By default,
 .Nm
diff --git a/usr.sbin/lpr/lpd/lpd.c b/usr.sbin/lpr/lpd/lpd.c
index c9a7e1615b74..df9bfcec5de1 100644
--- a/usr.sbin/lpr/lpd/lpd.c
+++ b/usr.sbin/lpr/lpd/lpd.c
@@ -73,28 +73,28 @@ static char sccsid[] = "@(#)lpd.c	8.7 (Berkeley) 5/10/95";
  */
 
 #include <sys/param.h>
-#include <sys/wait.h>
-#include <sys/types.h>
+#include <sys/file.h>
 #include <sys/socket.h>
-#include <sys/un.h>
 #include <sys/stat.h>
-#include <sys/file.h>
+#include <sys/un.h>
+#include <sys/wait.h>
+
 #include <netinet/in.h>
 #include <arpa/inet.h>
 
-#include <netdb.h>
-#include <unistd.h>
-#include <syslog.h>
-#include <signal.h>
+#include <ctype.h>
+#include <dirent.h>
 #include <err.h>
 #include <errno.h>
 #include <fcntl.h>
-#include <dirent.h>
+#include <netdb.h>
+#include <signal.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <sysexits.h>
-#include <ctype.h>
+#include <syslog.h>
+#include <unistd.h>
 #include "lp.h"
 #include "lp.local.h"
 #include "pathnames.h"
@@ -129,6 +129,7 @@ uid_t	uid, euid;
 int
 main(int argc, char **argv)
 {
+	struct timeval tv = { .tv_sec = 120 };
 	int ch_options, errs, f, funix, *finet, i, lfd, socket_debug;
 	fd_set defreadfds;
 	struct sockaddr_un un, fromunix;
@@ -151,7 +152,7 @@ main(int argc, char **argv)
 		errx(EX_NOPERM,"must run as root");
 
 	errs = 0;
-	while ((i = getopt(argc, argv, "cdlpswFW46")) != -1)
+	while ((i = getopt(argc, argv, "cdlpst:wFW46")) != -1)
 		switch (i) {
 		case 'c':
 			/* log all kinds of connection-errors to syslog */
@@ -171,6 +172,9 @@ main(int argc, char **argv)
 		case 's':		/* secure (no inet) */
 			sflag++;
 			break;
+		case 't':
+			tv.tv_sec = atol(optarg);
+			break;
 		case 'w':		/* netbsd uses -w for maxwait */
 			/*
 			 * This will be removed after the release of 4.4, as
@@ -398,6 +402,10 @@ main(int argc, char **argv)
 				syslog(LOG_WARNING, "accept: %m");
 			continue;
 		}
+		if (tv.tv_sec > 0) {
+			(void) setsockopt(s, SOL_SOCKET, SO_RCVTIMEO, &tv,
+			    sizeof(tv));
+		}
 		if (fork() == 0) {
 			/*
 			 * Note that printjob() also plays around with