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Initial commit of inetd daemon

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taubert 1998-01-24 08:35:51 +00:00
parent d352e8757c
commit 951ec8e48d
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9
usr.sbin/inetd/Makefile Normal file
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# BSDI $Id: Makefile,v 1.1 1998/01/24 08:35:42 taubert Exp $
# @(#)Makefile 5.5 (Berkeley) 6/29/90
PROG= inetd
LDADD= -lnetdb
MAN8= inetd.0
MLINKS= inetd.8 inetd.5
.INCLUDE: /src/gno/prog.mk

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usr.sbin/inetd/inetd.8 Normal file
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.\" Copyright (c) 1985, 1991 The Regents of the University of California.
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\" 3. All advertising materials mentioning features or use of this software
.\" must display the following acknowledgement:
.\" This product includes software developed by the University of
.\" California, Berkeley and its contributors.
.\" 4. Neither the name of the University nor the names of its contributors
.\" may be used to endorse or promote products derived from this software
.\" without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\" @(#)inetd.8 6.7 (Berkeley) 3/16/91
.\"
.Dd March 16, 1991
.Dt INETD 8
.Os BSD 4.3
.Sh NAME
.Nm inetd
.Nd internet
.Dq super-server
.Sh SYNOPSIS
.Nm inetd
.Op Fl d
.Op Ar configuration file
.Sh DESCRIPTION
.Nm Inetd
should be run at boot time by
.Pa /etc/rc.local
(see
.Xr rc 8 ) .
It then 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.
After the program is
finished, it continues to listen on the socket (except in some cases which
will be described below). Essentially,
.Nm inetd
allows running one daemon to invoke several others,
reducing load on the system.
.Pp
The option available for
.Nm inetd:
.Bl -tag -width Ds
.It Fl d
Turns on debugging.
.El
.Pp
Upon execution,
.Nm inetd
reads its configuration information from a configuration
file which, by default, is
.Pa /etc/inetd.conf .
There must be an entry for each field of the configuration
file, with entries for each field separated by a tab or
a space. Comments are denoted by a ``#'' at the beginning
of a line. There must be an entry for each field. The
fields of the configuration file are as follows:
.Pp
.Bd -unfilled -offset indent -compact
service name
socket type
protocol
wait/nowait
user
server program
server program arguments
.Ed
.Pp
The
.Em service-name
entry is the name of a valid service in
the file
.Pa /etc/services .
For
.Dq internal
services (discussed below), the service
name
.Em must
be the official name of the service (that is, the first entry in
.Pa /etc/services ) .
.Pp
The
.Em socket-type
should be one of
.Dq stream ,
.Dq dgram ,
.Dq raw ,
.Dq rdm ,
or
.Dq seqpacket ,
depending on whether the socket is a stream, datagram, raw,
reliably delivered message, or sequenced packet socket.
.Pp
The
.Em protocol
must be a valid protocol as given in
.Pa /etc/protocols .
Examples might be
.Dq tcp
or
.Dq udp .
.Pp
The
.Em wait/nowait
entry is applicable to datagram sockets only (other sockets should
have a
.Dq nowait
entry in this space). If a datagram server connects
to its peer, freeing the socket so
.Nm inetd
can received further messages on the socket, it is said to be
a
.Dq multi-threaded
server, and should use the
.Dq nowait
entry. For datagram servers which process all incoming datagrams
on a socket and eventually time out, the server is said to be
.Dq single-threaded
and should use a
.Dq wait
entry.
.Xr Comsat 8
.Pq Xr biff 1
and
.Xr talkd 8
are both examples of the latter type of
datagram server.
.Xr Tftpd 8
is an exception; it is a datagram server that establishes pseudo-connections.
It must be listed as
.Dq wait
in order to avoid a race;
the server reads the first packet, creates a new socket,
and then forks and exits to allow
.Nm inetd
to check for new service requests to spawn new servers.
.Pp
The
.Em user
entry should contain the user name of the user as whom the server
should run. This allows for servers to be given less permission
than root.
.Pp
The
.Em server-program
entry should contain the pathname of the program which is to be
executed by
.Nm inetd
when a request is found on its socket. If
.Nm inetd
provides this service internally, this entry should
be
.Dq internal .
.Pp
The
.Em server program arguments
should be just as arguments
normally are, starting with argv[0], which is the name of
the program. If the service is provided internally, the
word
.Dq internal
should take the place of this entry.
.Pp
.Nm Inetd
provides several
.Dq trivial
services internally by use of
routines within itself. These services are
.Dq echo ,
.Dq discard ,
.Dq chargen
(character generator),
.Dq daytime
(human readable time), and
.Dq time
(machine readable time,
in the form of the number of seconds since midnight, January
1, 1900). All of these services are tcp based. For
details of these services, consult the appropriate
.Tn RFC
from the Network Information Center.
.Pp
.Nm Inetd
rereads its configuration file when it receives a hangup signal,
.Dv SIGHUP .
Services may be added, deleted or modified when the configuration file
is reread.
.Sh SEE ALSO
.Xr comsat 8 ,
.Xr fingerd 8 ,
.Xr ftpd 8 ,
.Xr rexecd 8 ,
.Xr rlogind 8 ,
.Xr rshd 8 ,
.Xr telnetd 8 ,
.Xr tftpd 8
.Sh HISTORY
The
.Nm
command appeared in
.Bx 4.3 .

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/* BSDI $Id: inetd.c,v 1.1 1998/01/24 08:35:45 taubert Exp $ */
/*
* Copyright (c) 1983,1991 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1983 Regents of the University of California.\n\
All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static char sccsid[] = "@(#)inetd.c 5.30 (Berkeley) 6/3/91";
#endif /* not lint */
/*
* Inetd - Internet super-server
*
* This program invokes all internet services as needed.
* connection-oriented services are invoked each time a
* connection is made, by creating a process. This process
* is passed the connection as file descriptor 0 and is
* expected to do a getpeername to find out the source host
* and port.
*
* Datagram oriented services are invoked when a datagram
* arrives; a process is created and passed a pending message
* on file descriptor 0. Datagram servers may either connect
* to their peer, freeing up the original socket for inetd
* to receive further messages on, or ``take over the socket'',
* processing all arriving datagrams and, eventually, timing
* out. The first type of server is said to be ``multi-threaded'';
* the second type of server ``single-threaded''.
*
* Inetd uses a configuration file which is read at startup
* and, possibly, at some later time in response to a hangup signal.
* The configuration file is ``free format'' with fields given in the
* order shown below. Continuation lines for an entry must being with
* a space or tab. All fields must be present in each entry.
*
* service name must be in /etc/services
* socket type stream/dgram/raw/rdm/seqpacket
* protocol must be in /etc/protocols
* wait/nowait single-threaded/multi-threaded
* user user to run daemon as
* server program full path name
* server program arguments maximum of MAXARGS (20)
*
* Comment lines are indicated by a `#' in column 1.
*/
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/file.h>
#include <sys/wait.h>
#include <sys/time.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <errno.h>
#include <signal.h>
#include <netdb.h>
#include <syslog.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "pathnames.h"
#include "protos.h"
#define TOOMANY 40 /* don't start more than TOOMANY */
#define CNT_INTVL 60 /* servers in CNT_INTVL sec. */
#define RETRYTIME (60*10) /* retry after bind or server fail */
#define SIGBLOCK (sigmask(SIGCHLD)|sigmask(SIGHUP)|sigmask(SIGALRM))
int debug = 0;
int nsock = 0, maxsock = -1;
fd_set allsock;
int options = 0;
int timingout = 0;
struct servent *sp = NULL;
struct servtab {
char *se_service; /* name of service */
int se_socktype; /* type of socket to use */
char *se_proto; /* protocol used */
short se_wait; /* single threaded server */
short se_checked; /* looked at during merge */
char *se_user; /* user name to run as */
struct biltin *se_bi; /* if built-in, description */
char *se_server; /* server program */
#define MAXARGV 20
char *se_argv[MAXARGV+1]; /* program arguments */
int se_fd; /* open descriptor */
struct sockaddr_in se_ctrladdr;/* bound address */
int se_count; /* number started since se_time */
struct timeval se_time; /* start of se_count */
struct servtab *se_next;
} *servtab;
struct biltin {
char *bi_service; /* internally provided service name */
int bi_socktype; /* type of socket supported */
short bi_fork; /* 1 if should fork before call */
short bi_wait; /* 1 if should wait for child */
void (*bi_fn)(int, struct servtab *);
/* function which performs it */
} biltins[] = {
/* Echo received data */
"echo", SOCK_STREAM, 1, 0, echo_stream,
"echo", SOCK_DGRAM, 0, 0, echo_dg,
/* Internet /dev/null */
"discard", SOCK_STREAM, 1, 0, discard_stream,
"discard", SOCK_DGRAM, 0, 0, discard_dg,
/* Return 32 bit time since 1970 */
"time", SOCK_STREAM, 0, 0, machtime_stream,
"time", SOCK_DGRAM, 0, 0, machtime_dg,
/* Return human-readable time */
"daytime", SOCK_STREAM, 0, 0, daytime_stream,
"daytime", SOCK_DGRAM, 0, 0, daytime_dg,
/* Familiar character generator */
"chargen", SOCK_STREAM, 1, 0, chargen_stream,
"chargen", SOCK_DGRAM, 0, 0, chargen_dg,
0
};
#pragma databank 1
int fork_child(struct servtab *sep, int dofork, int ctrl)
{
register struct passwd *pwd;
register int tmpint;
static char buf[50];
sigsetmask(0L);
if (dofork)
for (tmpint = maxsock; tmpint > STDERR_FILENO; tmpint--)
if (tmpint != ctrl)
close(tmpint);
if (sep->se_bi)
(*sep->se_bi->bi_fn)(ctrl, sep);
else {
if (debug)
fprintf(stderr, "%d execl %s\n", getpid(), sep->se_server);
dup2(ctrl, STDIN_FILENO);
close(ctrl);
dup2(STDIN_FILENO, STDOUT_FILENO);
if (!debug)
dup2(STDIN_FILENO, STDERR_FILENO);
SetOutputDevice(3, 2l);
SetErrorDevice(3, 3l);
SetInputDevice(3, 1l);
if ((pwd = getpwnam(sep->se_user)) == NULL) {
syslog(LOG_ERR,
"getpwnam: %s: No such user",
sep->se_user);
if (sep->se_socktype != SOCK_STREAM)
recv(0, buf, sizeof (buf), 0);
_exit(1);
}
if (pwd->pw_uid) {
(void) setgid((gid_t)pwd->pw_gid);
(void) setuid((uid_t)pwd->pw_uid);
}
execv(sep->se_server, sep->se_argv);
if (sep->se_socktype != SOCK_STREAM)
recv(0, buf, sizeof (buf), 0);
syslog(LOG_ERR, "execv %s: %m", sep->se_server);
_exit(1);
}
if (sep->se_socktype == SOCK_STREAM)
close(ctrl);
return 0;
}
#pragma databank 0
#define NUMINT (sizeof(intab) / sizeof(struct inent))
char *CONFIG = _PATH_INETDCONF;
int main(int argc, char **argv)
{
register struct servtab *sep;
int ch, pid, dofork;
while ((ch = getopt(argc, argv, "d")) != EOF)
switch(ch) {
case 'd':
debug = 1;
options |= SO_DEBUG;
break;
case '?':
default:
fprintf(stderr, "usage: inetd [-d]");
exit(1);
}
argc -= optind;
argv += optind;
if (argc > 0)
CONFIG = argv[0];
openlog("inetd", 0, LOG_DAEMON);
signal(SIGALRM, retry);
config(0, 0);
signal(SIGHUP, config);
signal(SIGCHLD, reapchild);
{
/* space for daemons to overwrite environment for ps */
#define DUMMYSIZE 100
char dummy[DUMMYSIZE];
(void)memset(dummy, 'x', sizeof(DUMMYSIZE) - 1);
dummy[DUMMYSIZE - 1] = '\0';
(void)setenv("inetd_dummy", dummy, 1);
}
for (;;) {
int n, ctrl;
fd_set readable;
if (nsock == 0) {
(void) sigblock(SIGBLOCK);
while (nsock == 0)
sigpause(0L);
(void) sigsetmask(0L);
}
readable = allsock;
if ((n = select(maxsock + 1, &readable, (fd_set *)0,
(fd_set *)0, (struct timeval *)0)) <= 0) {
if (n < 0 && errno != EINTR)
syslog(LOG_WARNING, "select: %m\n");
sleep(1);
continue;
}
for (sep = servtab; n && sep; sep = sep->se_next)
if (sep->se_fd != -1 && FD_ISSET(sep->se_fd, &readable)) {
n--;
if (debug)
fprintf(stderr, "someone wants %s\n",
sep->se_service);
if (sep->se_socktype == SOCK_STREAM) {
ctrl = accept(sep->se_fd, (struct __SOCKADDR *)0,
(int *)0);
if (debug)
fprintf(stderr, "accept, ctrl %d\n", ctrl);
if (ctrl < 0) {
if (errno == EINTR)
continue;
syslog(LOG_WARNING, "accept (for %s): %m",
sep->se_service);
continue;
}
} else
ctrl = sep->se_fd;
(void) sigblock(SIGBLOCK);
pid = 0;
dofork = (sep->se_bi == 0 || sep->se_bi->bi_fork);
if (dofork) {
if (sep->se_count++ == 0)
(void)gettimeofday(&sep->se_time,
(struct timezone *)0);
else if (sep->se_count >= TOOMANY) {
struct timeval now;
(void)gettimeofday(&now, (struct timezone *)0);
if (now.tv_sec - sep->se_time.tv_sec >
CNT_INTVL) {
sep->se_time = now;
sep->se_count = 1;
} else {
syslog(LOG_ERR,
"%s/%s server failing (looping), service terminated\n",
sep->se_service, sep->se_proto);
FD_CLR(sep->se_fd, &allsock);
(void) close(sep->se_fd);
sep->se_fd = -1;
sep->se_count = 0;
nsock--;
if (!timingout) {
timingout = 1;
alarm(RETRYTIME);
}
}
}
pid = fork2(fork_child, 768, 0, "inetd fork", 4, sep, dofork, ctrl);
}
if (pid < 0) {
syslog(LOG_ERR, "fork: %m");
if (sep->se_socktype == SOCK_STREAM)
close(ctrl);
sigsetmask(0L);
sleep(1);
continue;
}
if (pid && sep->se_wait) {
sep->se_wait = pid;
if (sep->se_fd >= 0) {
FD_CLR(sep->se_fd, &allsock);
nsock--;
}
}
if (pid == 0) {
fork_child(sep, dofork, ctrl);
} else {
sigsetmask(0L);
if (sep->se_socktype == SOCK_STREAM)
close(ctrl);
}
}
}
}
#pragma databank 1
void reapchild(pid_t sig, int code)
{
union wait status;
int pid;
register struct servtab *sep;
pid = wait(&status);
if (pid <= 0)
return;
if (debug)
fprintf(stderr, "%d reaped\n", pid);
for (sep = servtab; sep; sep = sep->se_next)
if (sep->se_wait == pid) {
if (status.w_status)
syslog(LOG_WARNING,
"%s: exit status 0x%x",
sep->se_server, status.w_status);
if (debug)
fprintf(stderr, "restored %s, fd %d\n",
sep->se_service, sep->se_fd);
if (sep->se_fd >= 0) {
FD_SET(sep->se_fd, &allsock);
nsock++;
}
sep->se_wait = 1;
}
}
void config(pid_t sig, int code)
{
register struct servtab *sep, *cp, **sepp;
long omask;
if (!setconfig()) {
syslog(LOG_ERR, "%s: %m", CONFIG);
return;
}
for (sep = servtab; sep; sep = sep->se_next)
sep->se_checked = 0;
while (cp = getconfigent()) {
for (sep = servtab; sep; sep = sep->se_next)
if (strcmp(sep->se_service, cp->se_service) == 0 &&
strcmp(sep->se_proto, cp->se_proto) == 0)
break;
if (sep != 0) {
int i;
omask = sigblock(SIGBLOCK);
/*
* sep->se_wait may be holding the pid of a daemon
* that we're waiting for. If so, don't overwrite
* it unless the config file explicitly says don't
* wait.
*/
if (cp->se_bi == 0 &&
(sep->se_wait == 1 || cp->se_wait == 0))
sep->se_wait = cp->se_wait;
#define SWAP(a, b) { char *c = a; a = b; b = c; }
if (cp->se_user)
SWAP(sep->se_user, cp->se_user);
if (cp->se_server)
SWAP(sep->se_server, cp->se_server);
for (i = 0; i < MAXARGV; i++)
SWAP(sep->se_argv[i], cp->se_argv[i]);
sigsetmask(omask);
freeconfig(cp);
if (debug)
print_service("REDO", sep);
} else {
sep = enter(cp);
if (debug)
print_service("ADD ", sep);
}
sep->se_checked = 1;
sp = getservbyname(sep->se_service, sep->se_proto);
if (sp == 0) {
syslog(LOG_ERR, "%s/%s: unknown service",
sep->se_service, sep->se_proto);
if (sep->se_fd != -1)
(void) close(sep->se_fd);
sep->se_fd = -1;
continue;
}
if (sp->s_port != sep->se_ctrladdr.sin_port) {
sep->se_ctrladdr.sin_port = sp->s_port;
if (sep->se_fd != -1)
(void) close(sep->se_fd);
sep->se_fd = -1;
}
if (sep->se_fd == -1)
setup(sep);
}
endconfig();
/*
* Purge anything not looked at above.
*/
omask = sigblock(SIGBLOCK);
sepp = &servtab;
while (sep = *sepp) {
if (sep->se_checked) {
sepp = &sep->se_next;
continue;
}
*sepp = sep->se_next;
if (sep->se_fd != -1) {
FD_CLR(sep->se_fd, &allsock);
nsock--;
(void) close(sep->se_fd);
}
if (debug)
print_service("FREE", sep);
freeconfig(sep);
free((char *)sep);
}
(void) sigsetmask(omask);
}
void retry(pid_t sig, int code)
{
register struct servtab *sep;
timingout = 0;
for (sep = servtab; sep; sep = sep->se_next)
if (sep->se_fd == -1)
setup(sep);
}
#pragma databank 0
void setup(struct servtab *sep)
{
int on = 1;
if ((sep->se_fd = socket(AF_INET, sep->se_socktype, 0)) < 0) {
syslog(LOG_ERR, "%s/%s: socket: %m",
sep->se_service, sep->se_proto);
return;
}
#define turnon(fd, opt) \
setsockopt(fd, SOL_SOCKET, opt, (char *)&on, sizeof (on))
if (strcmp(sep->se_proto, "tcp") == 0 && (options & SO_DEBUG) &&
turnon(sep->se_fd, SO_DEBUG) < 0)
syslog(LOG_ERR, "setsockopt (SO_DEBUG): %m");
if (turnon(sep->se_fd, SO_REUSEADDR) < 0)
syslog(LOG_ERR, "setsockopt (SO_REUSEADDR): %m");
#undef turnon
if (bind(sep->se_fd, (struct __SOCKADDR *)&sep->se_ctrladdr,
sizeof (sep->se_ctrladdr)) < 0) {
syslog(LOG_ERR, "%s/%s: bind: %m",
sep->se_service, sep->se_proto);
(void) close(sep->se_fd);
sep->se_fd = -1;
if (!timingout) {
timingout = 1;
alarm(RETRYTIME);
}
return;
}
if (sep->se_socktype == SOCK_STREAM)
listen(sep->se_fd, 10);
FD_SET(sep->se_fd, &allsock);
nsock++;
if (sep->se_fd > maxsock)
maxsock = sep->se_fd;
}
struct servtab *enter(struct servtab *cp)
{
register struct servtab *sep;
long omask;
sep = (struct servtab *)malloc(sizeof (*sep));
if (sep == (struct servtab *)0) {
syslog(LOG_ERR, "Out of memory.");
exit(-1);
}
*sep = *cp;
sep->se_fd = -1;
omask = sigblock(SIGBLOCK);
sep->se_next = servtab;
servtab = sep;
sigsetmask(omask);
return (sep);
}
FILE *fconfig = NULL;
struct servtab serv;
char line[256];
int setconfig(void)
{
if (fconfig != NULL) {
fseek(fconfig, 0L, L_SET);
return (1);
}
fconfig = fopen(CONFIG, "r");
return (fconfig != NULL);
}
void endconfig(void)
{
if (fconfig) {
(void) fclose(fconfig);
fconfig = NULL;
}
}
struct servtab *getconfigent(void)
{
register struct servtab *sep = &serv;
int argc;
char *cp, *arg;
more:
while ((cp = nextline(fconfig)) && (*cp == '#' || *cp == '\0'))
;
if (cp == NULL)
return ((struct servtab *)0);
sep->se_service = newstr(skip(&cp));
arg = skip(&cp);
if (strcmp(arg, "stream") == 0)
sep->se_socktype = SOCK_STREAM;
else if (strcmp(arg, "dgram") == 0)
sep->se_socktype = SOCK_DGRAM;
else if (strcmp(arg, "rdm") == 0)
sep->se_socktype = SOCK_RDM;
else if (strcmp(arg, "seqpacket") == 0)
sep->se_socktype = SOCK_SEQPACKET;
else if (strcmp(arg, "raw") == 0)
sep->se_socktype = SOCK_RAW;
else
sep->se_socktype = -1;
sep->se_ctrladdr.sin_family = AF_INET;
sep->se_proto = newstr(skip(&cp));
arg = skip(&cp);
sep->se_wait = strcmp(arg, "wait") == 0;
sep->se_user = newstr(skip(&cp));
sep->se_server = newstr(skip(&cp));
if (strcmp(sep->se_server, "internal") == 0) {
register struct biltin *bi;
for (bi = biltins; bi->bi_service; bi++)
if (bi->bi_socktype == sep->se_socktype &&
strcmp(bi->bi_service, sep->se_service) == 0)
break;
if (bi->bi_service == 0) {
syslog(LOG_ERR, "internal service %s unknown\n",
sep->se_service);
goto more;
}
sep->se_bi = bi;
sep->se_wait = bi->bi_wait;
} else
sep->se_bi = NULL;
argc = 0;
for (arg = skip(&cp); cp; arg = skip(&cp))
if (argc < MAXARGV)
sep->se_argv[argc++] = newstr(arg);
while (argc <= MAXARGV)
sep->se_argv[argc++] = NULL;
return (sep);
}
void freeconfig(register struct servtab *cp)
{
int i;
if (cp->se_service)
free(cp->se_service);
if (cp->se_proto)
free(cp->se_proto);
if (cp->se_user)
free(cp->se_user);
if (cp->se_server)
free(cp->se_server);
for (i = 0; i < MAXARGV; i++)
if (cp->se_argv[i])
free(cp->se_argv[i]);
}
char *skip(char **cpp)
{
register char *cp = *cpp;
char *start;
again:
while (*cp == ' ' || *cp == '\t')
cp++;
if (*cp == '\0') {
int c;
c = getc(fconfig);
(void) ungetc(c, fconfig);
if (c == ' ' || c == '\t')
if (cp = nextline(fconfig))
goto again;
*cpp = (char *)0;
return ((char *)0);
}
start = cp;
while (*cp && *cp != ' ' && *cp != '\t')
cp++;
if (*cp != '\0')
*cp++ = '\0';
*cpp = cp;
return (start);
}
char *nextline(FILE *fd)
{
char *cp;
if (fgets(line, sizeof (line), fd) == NULL)
return ((char *)0);
cp = line;
while((*cp != '\0') && ((*cp == ' ') || (*cp == '\t')))
cp++;
strcpy(line, cp);
cp = index(line, '\n');
if (cp)
*cp = '\0';
return (line);
}
char *newstr(char *cp)
{
if (cp = strdup(cp ? cp : ""))
return(cp);
syslog(LOG_ERR, "strdup: %m");
exit(-1);
}
void socktitle(char *a, int s)
{
#ifdef HAVE_SETPROCTITLE
int size;
struct sockaddr_in sin;
size = sizeof(sin);
if (getpeername(s, (struct __SOCKADDR *)&sin, &size) == 0)
setproctitle("-%s [%s]", a, inet_ntoa(sin.sin_addr));
else
setproctitle("-%s", a);
#endif
}
/*
* Internet services provided internally by inetd:
*/
#define BUFSIZE 8192
/* ARGSUSED */
void echo_stream(int s, struct servtab *sep)
/* Echo service -- echo data back */
{
int i;
char *buffer = (char *)malloc(BUFSIZE);
if (!buffer) return;
socktitle(sep->se_service, s);
while ((i = read(s, buffer, BUFSIZE)) > 0 &&
write(s, buffer, i) > 0)
;
free(buffer);
}
/* ARGSUSED */
void echo_dg(int s, struct servtab *sep)
/* Echo service -- echo data back */
{
int i, size;
struct __SOCKADDR sa;
char *buffer = (char *)malloc(BUFSIZE);
if (!buffer) return;
size = sizeof(sa);
if ((i = recvfrom(s, buffer, BUFSIZE, 0, &sa, &size)) >= 0)
(void) sendto(s, buffer, i, 0, &sa, sizeof(sa));
free(buffer);
}
/* ARGSUSED */
void discard_stream(int s, struct servtab *sep)
/* Discard service -- ignore data */
{
int ret;
static char buffer[BUFSIZE];
socktitle(sep->se_service, s);
while (1) {
while ((ret = read(s, buffer, sizeof(buffer))) > 0)
;
if (ret == 0 || errno != EINTR)
break;
}
}
/* ARGSUSED */
void discard_dg(int s, struct servtab *sep)
/* Discard service -- ignore data */
{
static char buffer[BUFSIZE];
(void) read(s, buffer, sizeof(buffer));
}
#include <ctype.h>
#define LINESIZ 72
char ring[128];
char *endring = NULL;
void initring(void)
{
register int i;
endring = ring;
for (i = 0; i <= 128; ++i)
if (isprint(i))
*endring++ = i;
}
/* ARGSUSED */
void chargen_stream(int s, struct servtab *sep)
/* Character generator */
{
register char *rs;
int len;
char text[LINESIZ+2];
socktitle(sep->se_service, s);
if (!endring) {
initring();
rs = ring;
}
text[LINESIZ] = '\r';
text[LINESIZ + 1] = '\n';
for (rs = ring;;) {
if ((len = endring - rs) >= LINESIZ)
bcopy(rs, text, LINESIZ);
else {
bcopy(rs, text, len);
bcopy(ring, text + len, LINESIZ - len);
}
if (++rs == endring)
rs = ring;
if (write(s, text, sizeof(text)) != sizeof(text))
break;
}
}
/* ARGSUSED */
void chargen_dg(int s, struct servtab *sep)
/* Character generator */
{
struct __SOCKADDR sa;
static char *rs;
int len, size;
char text[LINESIZ+2];
if (endring == 0) {
initring();
rs = ring;
}
size = sizeof(sa);
if (recvfrom(s, text, sizeof(text), 0, &sa, &size) < 0)
return;
if ((len = endring - rs) >= LINESIZ)
bcopy(rs, text, LINESIZ);
else {
bcopy(rs, text, len);
bcopy(ring, text + len, LINESIZ - len);
}
if (++rs == endring)
rs = ring;
text[LINESIZ] = '\r';
text[LINESIZ + 1] = '\n';
(void) sendto(s, text, sizeof(text), 0, &sa, sizeof(sa));
}
/*
* Return a machine readable date and time, in the form of the
* number of seconds since midnight, Jan 1, 1900. Since gettimeofday
* returns the number of seconds since midnight, Jan 1, 1970,
* we must add 2208988800 seconds to this figure to make up for
* some seventy years Bell Labs was asleep.
*/
long machtime(void)
{
struct timeval tv;
if (gettimeofday(&tv, (struct timezone *)0) < 0) {
fprintf(stderr, "Unable to get time of day\n");
return (0L);
}
return (htonl((long)tv.tv_sec + 2208988800));
}
/* ARGSUSED */
void machtime_stream(int s, struct servtab *sep)
{
long result;
result = machtime();
(void) write(s, (char *) &result, sizeof(result));
}
/* ARGSUSED */
void machtime_dg(int s, struct servtab *sep)
{
long result;
struct __SOCKADDR sa;
int size;
size = sizeof(sa);
if (recvfrom(s, (char *)&result, sizeof(result), 0, &sa, &size) < 0)
return;
result = machtime();
(void) sendto(s, (char *) &result, sizeof(result), 0, &sa, sizeof(sa));
}
/* ARGSUSED */
void daytime_stream(int s, struct servtab *sep)
/* Return human-readable time of day */
{
char buffer[64];
time_t clock;
clock = time((time_t *) 0);
(void) sprintf(buffer, "%.24s\r\n", ctime(&clock));
(void) write(s, buffer, strlen(buffer));
}
/* ARGSUSED */
void daytime_dg(int s, struct servtab *sep)
/* Return human-readable time of day */
{
char buffer[64];
time_t clock;
struct __SOCKADDR sa;
int size;
clock = time((time_t *) 0);
size = sizeof(sa);
if (recvfrom(s, buffer, sizeof(buffer), 0, &sa, &size) < 0)
return;
(void) sprintf(buffer, "%.24s\r\n", ctime(&clock));
(void) sendto(s, buffer, strlen(buffer), 0, &sa, sizeof(sa));
}
/*
* print_service:
* Dump relevant information to stderr
*/
void print_service(char *action, struct servtab *sep)
{
fprintf(stderr,
"%s: %s proto=%s, wait=%d, user=%s builtin=%06lx server=%s\n",
action, sep->se_service, sep->se_proto,
sep->se_wait, sep->se_user, sep->se_bi, sep->se_server);
}

9
usr.sbin/inetd/inetd.desc Normal file
View File

@ -0,0 +1,9 @@
Name: inetd
Version: 1.0 (October 1997)
Shell: GNO & GS/TCP
Author: Derek Taubert (from BSDi code)
Contact: taubert@geeks.org
Where: /usr/bin
FTP: ground.isca.uiowa.edu apple2.caltech.edu trenco.myrias.com
Internet services daemon

31
usr.sbin/inetd/inetd.rez Normal file
View File

@ -0,0 +1,31 @@
/*
* Resources for inetd version and comment
*
* $Id: inetd.rez,v 1.1 1998/01/24 08:35:48 taubert Exp $
*/
#define PROG "inetd"
#define DESC "Internet services daemon."
#include "Types.rez"
/*
* Version
*/
resource rVersion (1, purgeable3) {
{ 1, 0, 0, /* Version 1.0.0 */
release, /* development|alpha|beta|final|release */
0 }, /* non-final release number */
verUS, /* Country */
PROG, /* Program name */
DESC " Released with GNO/ME and GS/TCP."
};
/*
* Comment
*/
resource rComment (1, purgeable3) {
PROG " v1.0 (October 1997)\n"
"GNO utility: " DESC "\n"
"Ported from BSDi code by Derek Taubert."
};

38
usr.sbin/inetd/pathnames.h Normal file
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@ -0,0 +1,38 @@
/*
* Copyright (c) 1989 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)pathnames.h 5.3 (Berkeley) 6/1/90
*/
#include <paths.h>
#define _PATH_INETDCONF "/etc/inetd.conf"

36
usr.sbin/inetd/protos.h Normal file
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@ -0,0 +1,36 @@
#include <gno/gno.h>
#include <texttool.h>
#define _exit(__i) return(__i)
segment "inetd ";
int fork_child(struct servtab *sep, int dofork, int ctrl);
void reapchild(int sig, int code);
void config(int sig, int code);
void retry(int sig, int code);
void setup(struct servtab *sep);
struct servtab *enter(struct servtab *cp);
int setconfig(void);
void endconfig(void);
struct servtab *getconfigent(void);
void freeconfig(struct servtab *cp);
char *skip(char **cpp);
char *nextline(FILE *fd);
char *newstr(char *cp);
void socktitle(char *a, int s);
void echo_stream(int s, struct servtab *sep);
void echo_dg(int s, struct servtab *sep);
void discard_stream(int s, struct servtab *sep);
void discard_dg(int s, struct servtab *sep);
void initring(void);
void chargen_stream(int s, struct servtab *sep);
void chargen_dg(int s, struct servtab *sep);
long machtime(void);
void machtime_stream(int s, struct servtab *sep);
void machtime_dg(int s, struct servtab *sep);
void daytime_stream(int s, struct servtab *sep);
void daytime_dg(int s, struct servtab *sep);
void print_service(char *action, struct servtab *sep);

29
usr.sbin/inetd/tags Normal file
View File

@ -0,0 +1,29 @@
Minetd inetd.c /^main(argc, argv, envp)$/
SWAP inetd.c /^#define SWAP(a, b) { char *c = a; a = b; b = c; }$/
chargen_dg inetd.c /^chargen_dg(s, sep) \/* Character generator *\/$/
chargen_stream inetd.c /^chargen_stream(s, sep) \/* Character generator */
config inetd.c /^config()$/
daytime_dg inetd.c /^daytime_dg(s, sep) \/* Return human-readable time/
daytime_stream inetd.c /^daytime_stream(s, sep) \/* Return human-readable /
discard_dg inetd.c /^discard_dg(s, sep) \/* Discard service -- ignore /
discard_stream inetd.c /^discard_stream(s, sep) \/* Discard service -- ign/
echo_dg inetd.c /^echo_dg(s, sep) \/* Echo service -- echo data ba/
echo_stream inetd.c /^echo_stream(s, sep) \/* Echo service -- echo data/
endconfig inetd.c /^endconfig()$/
enter inetd.c /^enter(cp)$/
freeconfig inetd.c /^freeconfig(cp)$/
getconfigent inetd.c /^getconfigent()$/
initring inetd.c /^initring()$/
machtime inetd.c /^machtime()$/
machtime_dg inetd.c /^machtime_dg(s, sep)$/
machtime_stream inetd.c /^machtime_stream(s, sep)$/
newstr inetd.c /^newstr(cp)$/
nextline inetd.c /^nextline(fd)$/
print_service inetd.c /^print_service(action, sep)$/
reapchild inetd.c /^reapchild()$/
retry inetd.c /^retry()$/
setconfig inetd.c /^setconfig()$/
setup inetd.c /^setup(sep)$/
skip inetd.c /^skip(cpp)$/
socktitle inetd.c /^socktitle(a, s)$/
turnon inetd.c /^#define turnon(fd, opt) \\$/