freebsd-dev/usr.sbin/rpc.yppasswdd/yppasswdd_main.c

351 lines
8.7 KiB
C

/*
* Copyright (c) 1995, 1996
* Bill Paul <wpaul@ctr.columbia.edu>. 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 Bill Paul.
* 4. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY Bill Paul 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 Bill Paul 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <netinet/in.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <memory.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h> /* getenv, exit */
#include <string.h>
#include <string.h> /* strcmp */
#include <syslog.h>
#include <unistd.h>
#include <rpc/rpc.h>
#include <rpc/rpc_com.h>
#include <rpc/pmap_clnt.h> /* for pmap_unset */
#include <rpcsvc/yp.h>
struct dom_binding {};
#include <rpcsvc/ypclnt.h>
#include "yppasswd.h"
#include "yppasswdd_extern.h"
#include "yppasswd_private.h"
#include "ypxfr_extern.h"
#include "yp_extern.h"
#ifndef SIG_PF
#define SIG_PF void(*)(int)
#endif
#ifdef DEBUG
#define RPC_SVC_FG
#endif
#define _RPCSVC_CLOSEDOWN 120
int _rpcpmstart = 0; /* Started by a port monitor ? */
static int _rpcfdtype;
/* Whether Stream or Datagram ? */
/* States a server can be in wrt request */
#define _IDLE 0
#define _SERVED 1
#define _SERVING 2
static char _localhost[] = "localhost";
static char _passwd_byname[] = "passwd.byname";
extern int _rpcsvcstate; /* Set when a request is serviced */
static char _progname[] = "rpc.yppasswdd";
char *progname = _progname;
static char _yp_dir[] = _PATH_YP;
char *yp_dir = _yp_dir;
static char _passfile_default[] = _PATH_YP "master.passwd";
char *passfile_default = _passfile_default;
char *passfile;
char *yppasswd_domain = NULL;
int no_chsh = 0;
int no_chfn = 0;
int allow_additions = 0;
int multidomain = 0;
int verbose = 0;
int resvport = 1;
int inplace = 0;
char sockname[] = YP_SOCKNAME;
static void
terminate(int sig __unused)
{
rpcb_unset(YPPASSWDPROG, YPPASSWDVERS, NULL);
rpcb_unset(MASTER_YPPASSWDPROG, MASTER_YPPASSWDVERS, NULL);
unlink(sockname);
exit(0);
}
static void
reload(int sig __unused)
{
load_securenets();
}
static void
closedown(int sig __unused)
{
if (_rpcsvcstate == _IDLE) {
extern fd_set svc_fdset;
static int size;
int i, openfd;
if (_rpcfdtype == SOCK_DGRAM) {
unlink(sockname);
exit(0);
}
if (size == 0) {
size = getdtablesize();
}
for (i = 0, openfd = 0; i < size && openfd < 2; i++)
if (FD_ISSET(i, &svc_fdset))
openfd++;
if (openfd <= 1) {
unlink(sockname);
exit(0);
}
}
if (_rpcsvcstate == _SERVED)
_rpcsvcstate = _IDLE;
(void) signal(SIGALRM, (SIG_PF) closedown);
(void) alarm(_RPCSVC_CLOSEDOWN/2);
}
static void
usage(void)
{
fprintf(stderr, "%s\n%s\n",
"usage: rpc.yppasswdd [-t master.passwd file] [-d domain] [-p path] [-s]",
" [-f] [-m] [-i] [-a] [-v] [-u] [-h]");
exit(1);
}
int
main(int argc, char *argv[])
{
struct rlimit rlim;
SVCXPRT *transp = NULL;
struct sockaddr_in saddr;
int asize = sizeof (saddr);
struct netconfig *nconf;
void *localhandle;
int ch;
char *mastername;
char myname[MAXHOSTNAMELEN + 2];
int maxrec = RPC_MAXDATASIZE;
extern int debug;
debug = 1;
while ((ch = getopt(argc, argv, "t:d:p:sfamuivh")) != -1) {
switch (ch) {
case 't':
passfile_default = optarg;
break;
case 'd':
yppasswd_domain = optarg;
break;
case 's':
no_chsh++;
break;
case 'f':
no_chfn++;
break;
case 'p':
yp_dir = optarg;
break;
case 'a':
allow_additions++;
break;
case 'm':
multidomain++;
break;
case 'i':
inplace++;
break;
case 'v':
verbose++;
break;
case 'u':
resvport = 0;
break;
default:
case 'h':
usage();
break;
}
}
if (yppasswd_domain == NULL) {
if (yp_get_default_domain(&yppasswd_domain)) {
yp_error("no domain specified and system domain \
name isn't set -- aborting");
usage();
}
}
load_securenets();
if (getrpcport(_localhost, YPPROG, YPVERS, IPPROTO_UDP) <= 0) {
yp_error("no ypserv processes registered with local portmap");
yp_error("this host is not an NIS server -- aborting");
exit(1);
}
if ((mastername = ypxfr_get_master(yppasswd_domain,
_passwd_byname, _localhost, 0)) == NULL) {
yp_error("can't get name of NIS master server for domain %s",
yppasswd_domain);
exit(1);
}
if (gethostname((char *)&myname, sizeof(myname)) == -1) {
yp_error("can't get local hostname: %s", strerror(errno));
exit(1);
}
if (strncasecmp(mastername, (char *)&myname, sizeof(myname))) {
yp_error("master of %s is %s, but we are %s",
"passwd.byname", mastername, myname);
yp_error("this host is not the NIS master server for \
the %s domain -- aborting", yppasswd_domain);
exit(1);
}
debug = 0;
if (getsockname(0, (struct sockaddr *)&saddr, &asize) == 0) {
int ssize = sizeof (int);
if (saddr.sin_family != AF_INET)
exit(1);
if (getsockopt(0, SOL_SOCKET, SO_TYPE,
(char *)&_rpcfdtype, &ssize) == -1)
exit(1);
_rpcpmstart = 1;
}
if (!debug && _rpcpmstart == 0) {
if (daemon(0,0)) {
err(1,"cannot fork");
}
}
openlog("rpc.yppasswdd", LOG_PID, LOG_DAEMON);
rpcb_unset(YPPASSWDPROG, YPPASSWDVERS, NULL);
rpcb_unset(MASTER_YPPASSWDPROG, MASTER_YPPASSWDVERS, NULL);
rpc_control(RPC_SVC_CONNMAXREC_SET, &maxrec);
if (svc_create(yppasswdprog_1, YPPASSWDPROG, YPPASSWDVERS, "netpath") == 0) {
yp_error("cannot create yppasswd service.");
exit(1);
}
if (svc_create(master_yppasswdprog_1, MASTER_YPPASSWDPROG,
MASTER_YPPASSWDVERS, "netpath") == 0) {
yp_error("cannot create master_yppasswd service.");
exit(1);
}
nconf = NULL;
localhandle = setnetconfig();
while ((nconf = getnetconfig(localhandle)) != NULL) {
if (nconf->nc_protofmly != NULL &&
strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0)
break;
}
if (nconf == NULL) {
yp_error("getnetconfigent unix: %s", nc_sperror());
exit(1);
}
unlink(sockname);
transp = svcunix_create(RPC_ANYSOCK, 0, 0, sockname);
if (transp == NULL) {
yp_error("cannot create AF_LOCAL service.");
exit(1);
}
if (!svc_reg(transp, MASTER_YPPASSWDPROG, MASTER_YPPASSWDVERS,
master_yppasswdprog_1, nconf)) {
yp_error("unable to register (MASTER_YPPASSWDPROG, \
MASTER_YPPASSWDVERS, unix).");
exit(1);
}
endnetconfig(localhandle);
/* Only root may connect() to the AF_UNIX link. */
if (chmod(sockname, 0))
err(1, "chmod of %s failed", sockname);
if (transp == (SVCXPRT *)NULL) {
yp_error("could not create a handle");
exit(1);
}
if (_rpcpmstart) {
(void) signal(SIGALRM, (SIG_PF) closedown);
(void) alarm(_RPCSVC_CLOSEDOWN/2);
}
/* Unlimited resource limits. */
rlim.rlim_cur = rlim.rlim_max = RLIM_INFINITY;
(void)setrlimit(RLIMIT_CPU, &rlim);
(void)setrlimit(RLIMIT_FSIZE, &rlim);
(void)setrlimit(RLIMIT_STACK, &rlim);
(void)setrlimit(RLIMIT_DATA, &rlim);
(void)setrlimit(RLIMIT_RSS, &rlim);
/* Don't drop core (not really necessary, but GP's). */
rlim.rlim_cur = rlim.rlim_max = 0;
(void)setrlimit(RLIMIT_CORE, &rlim);
/* Turn off signals. */
(void)signal(SIGALRM, SIG_IGN);
(void)signal(SIGHUP, (SIG_PF) reload);
(void)signal(SIGINT, SIG_IGN);
(void)signal(SIGPIPE, SIG_IGN);
(void)signal(SIGQUIT, SIG_IGN);
(void)signal(SIGTERM, (SIG_PF) terminate);
svc_run();
yp_error("svc_run returned");
exit(1);
/* NOTREACHED */
}