1130b656e5
This will make a number of things easier in the future, as well as (finally!) avoiding the Id-smashing problem which has plagued developers for so long. Boy, I'm glad we're not using sup anymore. This update would have been insane otherwise.
370 lines
8.4 KiB
C
370 lines
8.4 KiB
C
/*
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* Copyright (c) 1995, 1996
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* Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Bill Paul.
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* 4. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include "yppasswd.h"
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#include <stdio.h>
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#include <sys/types.h>
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#include <stdlib.h> /* getenv, exit */
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#include <unistd.h>
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#include <string.h>
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#include <sys/param.h>
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#include <rpc/pmap_clnt.h> /* for pmap_unset */
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#include <string.h> /* strcmp */
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#include <signal.h>
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#include <fcntl.h>
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#include <sys/ioctl.h>
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#include <sys/stat.h>
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#include <sys/ttycom.h> /* TIOCNOTTY */
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#ifdef __cplusplus
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#include <sysent.h> /* getdtablesize, open */
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#endif /* __cplusplus */
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#include <memory.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <syslog.h>
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#include <err.h>
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#include <errno.h>
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#include <rpcsvc/yp.h>
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struct dom_binding {};
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#include <rpcsvc/ypclnt.h>
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#include "yppasswdd_extern.h"
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#include "yppasswd_comm.h"
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#include "ypxfr_extern.h"
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#ifndef SIG_PF
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#define SIG_PF void(*)(int)
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#endif
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#ifdef DEBUG
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#define RPC_SVC_FG
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#endif
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#define _RPCSVC_CLOSEDOWN 120
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#ifndef lint
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static const char rcsid[] = "$FreeBSD$";
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#endif /* not lint */
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int _rpcpmstart = 0; /* Started by a port monitor ? */
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static int _rpcfdtype;
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/* Whether Stream or Datagram ? */
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/* States a server can be in wrt request */
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#define _IDLE 0
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#define _SERVED 1
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#define _SERVING 2
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extern int _rpcsvcstate; /* Set when a request is serviced */
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char *progname = "rpc.yppasswdd";
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char *yp_dir = _PATH_YP;
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char *passfile_default = _PATH_YP "master.passwd";
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char *passfile;
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char *yppasswd_domain = NULL;
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int no_chsh = 0;
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int no_chfn = 0;
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int allow_additions = 0;
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int multidomain = 0;
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int verbose = 0;
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int resvport = 1;
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int inplace = 0;
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int yp_sock;
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static void
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my_svc_run()
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{
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#ifdef FD_SETSIZE
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fd_set readfds;
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#else
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int readfds;
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#endif /* def FD_SETSIZE */
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extern int errno;
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for (;;) {
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#ifdef FD_SETSIZE
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readfds = svc_fdset;
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#else
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readfds = svc_fds;
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#endif /* def FD_SETSIZE */
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FD_SET(yp_sock, &readfds);
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switch (select(_rpc_dtablesize(), &readfds, (fd_set *)0, (fd_set *)0,
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(struct timeval *)0)) {
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case -1:
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if (errno == EINTR) {
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continue;
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}
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perror("svc_run: - select failed");
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return;
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case 0:
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continue;
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default:
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if (FD_ISSET(yp_sock, &readfds)) {
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do_master();
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FD_CLR(yp_sock, &readfds);
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}
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svc_getreqset(&readfds);
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}
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}
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}
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static void terminate(sig)
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int sig;
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{
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svc_unregister(YPPASSWDPROG, YPPASSWDVERS);
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close(yp_sock);
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unlink(sockname);
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exit(0);
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}
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static void reload(sig)
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int sig;
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{
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load_securenets();
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}
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static void
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closedown(int sig)
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{
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if (_rpcsvcstate == _IDLE) {
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extern fd_set svc_fdset;
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static int size;
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int i, openfd;
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if (_rpcfdtype == SOCK_DGRAM) {
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close(yp_sock);
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unlink(sockname);
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exit(0);
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}
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if (size == 0) {
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size = getdtablesize();
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}
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for (i = 0, openfd = 0; i < size && openfd < 2; i++)
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if (FD_ISSET(i, &svc_fdset))
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openfd++;
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if (openfd <= 1) {
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close(yp_sock);
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unlink(sockname);
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exit(0);
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}
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}
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if (_rpcsvcstate == _SERVED)
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_rpcsvcstate = _IDLE;
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(void) signal(SIGALRM, (SIG_PF) closedown);
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(void) alarm(_RPCSVC_CLOSEDOWN/2);
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}
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static void usage()
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{
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fprintf(stderr, "Usage: %s [-t master.passwd file] [-d domain] \
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[-p path] [-s] [-f] [-m] [-i] [-a] [-v] [-u] [-h]\n",
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progname);
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exit(1);
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}
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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register SVCXPRT *transp = NULL;
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int sock;
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int proto = 0;
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struct sockaddr_in saddr;
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int asize = sizeof (saddr);
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int ch;
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char *mastername;
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char myname[MAXHOSTNAMELEN + 2];
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extern int errno;
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extern int debug;
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debug = 1;
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while ((ch = getopt(argc, argv, "t:d:p:sfamuivh")) != EOF) {
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switch(ch) {
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case 't':
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passfile_default = optarg;
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break;
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case 'd':
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yppasswd_domain = optarg;
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break;
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case 's':
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no_chsh++;
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break;
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case 'f':
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no_chfn++;
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break;
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case 'p':
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yp_dir = optarg;
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break;
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case 'a':
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allow_additions++;
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break;
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case 'm':
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multidomain++;
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break;
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case 'i':
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inplace++;
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break;
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case 'v':
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verbose++;
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break;
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case 'u':
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resvport = 0;
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break;
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default:
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case 'h':
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usage();
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break;
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}
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}
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if (yppasswd_domain == NULL) {
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if (yp_get_default_domain(&yppasswd_domain)) {
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yp_error("no domain specified and system domain \
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name isn't set -- aborting");
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usage();
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}
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}
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load_securenets();
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if (getrpcport("localhost", YPPROG, YPVERS, IPPROTO_UDP) <= 0) {
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yp_error("no ypserv processes registered with local portmap");
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yp_error("this host is not an NIS server -- aborting");
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exit(1);
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}
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if ((mastername = ypxfr_get_master(yppasswd_domain, "passwd.byname",
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"localhost",0)) == NULL) {
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yp_error("can't get name of NIS master server for domain %s",
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yppasswd_domain);
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exit(1);
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}
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if (gethostname((char *)&myname, sizeof(myname)) == -1) {
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yp_error("can't get local hostname: %s", strerror(errno));
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exit(1);
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}
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if (strncmp(mastername, (char *)&myname, sizeof(myname))) {
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yp_error("master of %s is %s, but we are %s",
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"passwd.byname", mastername, myname);
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yp_error("this host is not the NIS master server for \
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the %s domain -- aborting", yppasswd_domain);
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exit(1);
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}
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debug = 0;
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if (getsockname(0, (struct sockaddr *)&saddr, &asize) == 0) {
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int ssize = sizeof (int);
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if (saddr.sin_family != AF_INET)
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exit(1);
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if (getsockopt(0, SOL_SOCKET, SO_TYPE,
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(char *)&_rpcfdtype, &ssize) == -1)
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exit(1);
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sock = 0;
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_rpcpmstart = 1;
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proto = 0;
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openlog(progname, LOG_PID, LOG_DAEMON);
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} else {
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if (!debug) {
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if (daemon(0,0)) {
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err(1,"cannot fork");
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}
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}
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openlog(progname, LOG_PID, LOG_DAEMON);
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sock = RPC_ANYSOCK;
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(void) pmap_unset(YPPASSWDPROG, YPPASSWDVERS);
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}
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if ((_rpcfdtype == 0) || (_rpcfdtype == SOCK_DGRAM)) {
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transp = svcudp_create(sock);
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if (transp == NULL) {
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yp_error("cannot create udp service.");
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exit(1);
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}
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if (!_rpcpmstart)
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proto = IPPROTO_UDP;
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if (!svc_register(transp, YPPASSWDPROG, YPPASSWDVERS, yppasswdprog_1, proto)) {
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yp_error("unable to register (YPPASSWDPROG, YPPASSWDVERS, udp).");
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exit(1);
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}
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}
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if ((_rpcfdtype == 0) || (_rpcfdtype == SOCK_STREAM)) {
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transp = svctcp_create(sock, 0, 0);
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if (transp == NULL) {
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yp_error("cannot create tcp service.");
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exit(1);
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}
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if (!_rpcpmstart)
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proto = IPPROTO_TCP;
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if (!svc_register(transp, YPPASSWDPROG, YPPASSWDVERS, yppasswdprog_1, proto)) {
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yp_error("unable to register (YPPASSWDPROG, YPPASSWDVERS, tcp).");
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exit(1);
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}
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}
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if (transp == (SVCXPRT *)NULL) {
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yp_error("could not create a handle");
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exit(1);
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}
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if (_rpcpmstart) {
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(void) signal(SIGALRM, (SIG_PF) closedown);
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(void) alarm(_RPCSVC_CLOSEDOWN/2);
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}
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/* set up resource limits and block signals */
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pw_init();
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/* except SIGCHLD, which we need to catch */
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install_reaper(1);
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signal(SIGTERM, (SIG_PF) terminate);
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signal(SIGHUP, (SIG_PF) reload);
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unlink(sockname);
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yp_sock = makeservsock();
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if (chmod(sockname, 0))
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err(1, "chmod of %s failed", sockname);
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my_svc_run();
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yp_error("svc_run returned");
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exit(1);
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/* NOTREACHED */
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}
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