Author: Marco d'Itri

Portability patch. Taken from Debian.

--- a/inetd.8
+++ b/inetd.8
@@ -42,11 +42,7 @@
 .Op Ar configuration_file
 .Sh DESCRIPTION
 .Nm inetd
-should be run at boot time by
-.Pa /etc/rc
-(see
-.Xr rc 8 ) .
-It then listens for connections on certain internet sockets.
+listens for connections on certain internet sockets.
 When a connection is found on one
 of its sockets, it decides what service the socket
 corresponds to, and invokes a program to service the request.
@@ -149,7 +145,8 @@ The
 .Em service name
 entry is the name of a valid service in
 the file
-.Pa /etc/services .
+.Pa /etc/services
+or a port number.
 For
 .Dq internal
 services (discussed below), the service
@@ -166,7 +163,7 @@ The part on the right of the
 is the RPC version number.
 This can simply be a single numeric argument or a range of versions.
 A range is bounded by the low version to the high version -
-.Dq rusers/1-3 .
+.Dq rusers/1\-3 .
 For
 .Ux Ns -domain
 sockets this field specifies the path name of the socket.
@@ -186,7 +183,8 @@ reliably delivered message, or sequenced
 The
 .Em protocol
 must be a valid protocol as given in
-.Pa /etc/protocols .
+.Pa /etc/protocols or
+.Dq unix .
 Examples might be
 .Dq tcp
 or
@@ -364,9 +362,7 @@ If you have only one server on
 only IPv6 traffic will be routed to the server.
 .El
 .Sh SEE ALSO
-.Xr comsat 8 ,
 .Xr fingerd 8 ,
-.Xr ftp-proxy 8 ,
 .Xr ftpd 8 ,
 .Xr identd 8 ,
 .Xr talkd 8
@@ -379,7 +375,23 @@ Support for Sun-RPC
 based services is modelled after that
 provided by SunOS 4.1.
 IPv6 support was added by the KAME project in 1999.
+.Pp
+Marco d'Itri ported this code from OpenBSD in summer 2002 and added
+socket buffers tuning and libwrap support from the NetBSD source tree.
 .Sh BUGS
+On Linux systems, the daemon cannot reload its configuration and needs
+to be restarted when the host address for a service is changed between
+.Dq \&*
+and a specific address.
+.Pp
+Server programs used with
+.Dq dgram
+.Dq udp
+.Dq nowait
+must read from the network socket, or
+.Nm inetd
+will spawn processes until the maximum is reached.
+.Pp
 Host address specifiers, while they make conceptual sense for RPC
 services, do not work entirely correctly.
 This is largely because the
--- a/inetd.c
+++ b/inetd.c
@@ -127,6 +127,7 @@
 #include <sys/un.h>
 #include <sys/file.h>
 #include <sys/wait.h>
+#include <time.h>
 #include <sys/time.h>
 #include <sys/resource.h>

@@ -147,14 +148,21 @@
 #include <unistd.h>
 #include <limits.h>
 #include <string.h>
+#ifdef HAVE_SETUSERCONTEXT
 #include <login_cap.h>
+#endif
+#ifdef HAVE_GETIFADDRS
 #include <ifaddrs.h>
+#endif
 #include <rpc/rpc.h>
 #include <rpc/pmap_clnt.h>
-#include <rpcsvc/nfs_prot.h>
 #include <event.h>
 #include "pathnames.h"

+#ifndef HAVE_PLEDGE
+#define pledge(a, b) (0)
+#endif
+
 #define MINIMUM(a, b)	(((a) < (b)) ? (a) : (b))

 #define	TOOMANY		256		/* don't start more than TOOMANY */
@@ -342,8 +350,10 @@ main(int argc, char *argv[])
	umask(022);
	if (debug == 0) {
		daemon(0, 0);
+#ifdef HAVE_SETLOGIN
		if (uid == 0)
			(void) setlogin("");
+#endif
	}

	if (pledge("stdio rpath cpath getpw dns inet unix proc exec id", NULL) == -1)
@@ -384,6 +394,15 @@ main(int argc, char *argv[])

	signal(SIGPIPE, SIG_IGN);

+	/* space for daemons to overwrite environment for ps */
+	{
+#define DUMMYSIZE 100
+		char dummy[DUMMYSIZE];
+		memset(dummy, 'x', DUMMYSIZE - 1);
+		dummy[DUMMYSIZE - 1] = '\0';
+		setenv("inetd_dummy", dummy, 1);
+	}
+
	event_dispatch();

	return (0);
@@ -476,9 +495,6 @@ dg_badinput(struct sockaddr *sa)
		goto bad;
	}

-	if (port < IPPORT_RESERVED || port == NFS_PORT)
-		goto bad;
-
	return (0);

 bad:
@@ -488,6 +504,7 @@ bad:
 int
 dg_broadcast(struct in_addr *in)
 {
+#ifdef HAVE_GETIFADDRS
	struct ifaddrs *ifa, *ifap;
	struct sockaddr_in *sin;

@@ -504,6 +521,7 @@ dg_broadcast(struct in_addr *in)
		}
	}
	freeifaddrs(ifap);
+#endif
	return (0);
 }

@@ -1690,7 +1708,7 @@ print_service(char *action, struct servt
	fprintf(stderr,
	    " wait.max=%d.%d user:group=%s:%s builtin=%lx server=%s\n",
	    sep->se_wait, sep->se_max, sep->se_user,
-	    sep->se_group ? sep->se_group : "wheel",
+	    sep->se_group ? sep->se_group : "(default)",
	    (long)sep->se_bi, sep->se_server);
 }

@@ -1799,6 +1817,7 @@ spawn(int ctrl, short events, void *xsep
				if (uid != pwd->pw_uid)
					exit(1);
			} else {
+#ifdef HAVE_SETUSERCONTEXT
				tmpint = LOGIN_SETALL &
				    ~(LOGIN_SETGROUP|LOGIN_SETLOGIN);
				if (pwd->pw_uid)
@@ -1814,6 +1833,53 @@ spawn(int ctrl, short events, void *xsep
					    sep->se_service, sep->se_proto);
					exit(1);
				}
+#else
+				/* what about setpriority(2), setrlimit(2),
+				 * and umask(2)? The $PATH is cleared.
+				 */
+				if (pwd->pw_uid) {
+				    if (sep->se_group)
+					pwd->pw_gid = grp->gr_gid;
+				    if (setgid(pwd->pw_gid) < 0) {
+					syslog(LOG_ERR,
+					    "%s/%s: can't set gid %d: %m",
+					    sep->se_service, sep->se_proto,
+					    pwd->pw_gid);
+					exit(1);
+				    }
+				    if (initgroups(pwd->pw_name, pwd->pw_gid)
+					    < 0) {
+					syslog(LOG_ERR,
+					    "%s/%s: can't initgroups(%s): %m",
+					    sep->se_service, sep->se_proto,
+					    pwd->pw_name);
+					exit(1);
+				    }
+				    if (setuid(pwd->pw_uid) < 0) {
+					syslog(LOG_ERR,
+						"%s/%s: can't set uid %d: %m",
+						sep->se_service, sep->se_proto,
+						pwd->pw_uid);
+					exit(1);
+				    }
+				} else if (sep->se_group) {
+				    if (setgid(pwd->pw_gid) < 0) {
+					syslog(LOG_ERR,
+					    "%s/%s: can't set gid %d: %m",
+					    sep->se_service, sep->se_proto,
+					    pwd->pw_gid);
+					exit(1);
+				    }
+				    if (initgroups(pwd->pw_name, pwd->pw_gid)
+					    < 0) {
+					syslog(LOG_ERR,
+					    "%s/%s: can't initgroups(%s): %m",
+					    sep->se_service, sep->se_proto,
+					    pwd->pw_name);
+					exit(1);
+				    }
+				}
+#endif
			}
			if (debug)
				fprintf(stderr, "%ld execv %s\n",