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yppush.8
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yppush_extern.h
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yppush_main.c
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Editing: yppush_main.c
/*- * SPDX-License-Identifier: BSD-4-Clause * * Copyright (c) 1995 * 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 <errno.h> #include <signal.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <strings.h> #include <time.h> #include <unistd.h> #include <sys/socket.h> #include <sys/fcntl.h> #include <sys/wait.h> #include <sys/param.h> #include <rpc/rpc.h> #include <rpc/clnt.h> #include <rpc/pmap_clnt.h> #include <rpcsvc/yp.h> #include <rpcsvc/ypclnt.h> #include "ypxfr_extern.h" #include "yppush_extern.h" char *progname = "yppush"; int debug = 1; int _rpcpmstart = 0; char *yp_dir = _PATH_YP; static char *yppush_mapname = NULL; /* Map to transfer. */ static char *yppush_domain = NULL; /* Domain in which map resides. */ static char *yppush_master = NULL; /* Master NIS server for said domain. */ static int skip_master = 0; /* Do not attempt to push map to master. */ static int verbose = 0; /* Toggle verbose mode. */ static unsigned long yppush_transid = 0; static int yppush_timeout = 80; /* Default timeout. */ static int yppush_jobs = 1; /* Number of allowed concurrent jobs. */ static int yppush_running_jobs = 0; /* Number of currently running jobs. */ /* Structure for holding information about a running job. */ struct jobs { unsigned long tid; int port; ypxfrstat stat; unsigned long prognum; char *server; char *map; int polled; struct jobs *next; }; static struct jobs *yppush_joblist; /* Linked list of running jobs. */ static int yppush_svc_run(int); /* * Local error messages. */ static const char * yppusherr_string(int err) { switch (err) { case YPPUSH_TIMEDOUT: return("transfer or callback timed out"); case YPPUSH_YPSERV: return("failed to contact ypserv"); case YPPUSH_NOHOST: return("no such host"); case YPPUSH_PMAP: return("portmapper failure"); default: return("unknown error code"); } } /* * Report state of a job. */ static int yppush_show_status(ypxfrstat status, unsigned long tid) { struct jobs *job; job = yppush_joblist; while (job != NULL) { if (job->tid == tid) break; job = job->next; } if (job == NULL) { yp_error("warning: received callback with invalid transaction ID: %lu", tid); return (0); } if (job->polled) { yp_error("warning: received callback with duplicate transaction ID: %lu", tid); return (0); } if (verbose > 1) { yp_error("checking return status: transaction ID: %lu", job->tid); } if (status != YPXFR_SUCC || verbose) { yp_error("transfer of map %s to server %s %s", job->map, job->server, status == YPXFR_SUCC ? "succeeded" : "failed"); yp_error("status returned by ypxfr: %s", status > YPXFR_AGE ? yppusherr_string(status) : ypxfrerr_string(status)); } job->polled = 1; svc_unregister(job->prognum, 1); yppush_running_jobs--; return(0); } /* Exit routine. */ static void yppush_exit(int now) { struct jobs *jptr; int still_pending = 1; /* Let all the information trickle in. */ while (!now && still_pending) { jptr = yppush_joblist; still_pending = 0; while (jptr) { if (jptr->polled == 0) { still_pending++; if (verbose > 1) yp_error("%s has not responded", jptr->server); } else { if (verbose > 1) yp_error("%s has responded", jptr->server); } jptr = jptr->next; } if (still_pending) { if (verbose > 1) yp_error("%d transfer%sstill pending", still_pending, still_pending > 1 ? "s " : " "); if (yppush_svc_run (YPPUSH_RESPONSE_TIMEOUT) == 0) { yp_error("timed out"); now = 1; } } else { if (verbose) yp_error("all transfers complete"); break; } } /* All stats collected and reported -- kill all the stragglers. */ jptr = yppush_joblist; while (jptr) { if (!jptr->polled) yp_error("warning: exiting with transfer \ to %s (transid = %lu) still pending", jptr->server, jptr->tid); svc_unregister(jptr->prognum, 1); jptr = jptr->next; } exit(0); } /* * Handler for 'normal' signals. */ static void handler(int sig) { yppush_exit (1); return; } /* * Dispatch loop for callback RPC services. * Return value: * -1 error * 0 timeout * >0 request serviced */ static int yppush_svc_run(int timeout_secs) { int rc; fd_set readfds; struct timeval timeout; timeout.tv_usec = 0; timeout.tv_sec = timeout_secs; retry: readfds = svc_fdset; rc = select(svc_maxfd + 1, &readfds, NULL, NULL, &timeout); switch (rc) { case -1: if (errno == EINTR) goto retry; yp_error("select failed: %s", strerror(errno)); break; case 0: yp_error("select() timed out"); break; default: svc_getreqset(&readfds); break; } return rc; } /* * RPC service routines for callbacks. */ void * yppushproc_null_1_svc(void *argp, struct svc_req *rqstp) { static char * result; /* Do nothing -- RPC conventions call for all a null proc. */ return((void *) &result); } void * yppushproc_xfrresp_1_svc(yppushresp_xfr *argp, struct svc_req *rqstp) { static char * result; yppush_show_status(argp->status, argp->transid); return((void *) &result); } /* * Transmit a YPPROC_XFR request to ypserv. */ static int yppush_send_xfr(struct jobs *job) { ypreq_xfr req; /* ypresp_xfr *resp; */ DBT key, data; CLIENT *clnt; struct rpc_err err; struct timeval timeout; timeout.tv_usec = 0; timeout.tv_sec = 0; /* * The ypreq_xfr structure has a member of type map_parms, * which seems to require the order number of the map. * It isn't actually used at the other end (at least the * FreeBSD ypserv doesn't use it) but we fill it in here * for the sake of completeness. */ key.data = "YP_LAST_MODIFIED"; key.size = sizeof ("YP_LAST_MODIFIED") - 1; if (yp_get_record(yppush_domain, yppush_mapname, &key, &data, 1) != YP_TRUE) { yp_error("failed to read order number from %s: %s: %s", yppush_mapname, yperr_string(yp_errno), strerror(errno)); return(1); } /* Fill in the request arguments */ req.map_parms.ordernum = atoi(data.data); req.map_parms.domain = yppush_domain; req.map_parms.peer = yppush_master; req.map_parms.map = job->map; req.transid = job->tid; req.prog = job->prognum; req.port = job->port; /* Get a handle to the remote ypserv. */ if ((clnt = clnt_create(job->server, YPPROG, YPVERS, "udp")) == NULL) { yp_error("%s: %s",job->server,clnt_spcreateerror("couldn't \ create udp handle to NIS server")); switch (rpc_createerr.cf_stat) { case RPC_UNKNOWNHOST: job->stat = YPPUSH_NOHOST; break; case RPC_PMAPFAILURE: job->stat = YPPUSH_PMAP; break; default: job->stat = YPPUSH_RPC; break; } return(1); } /* * Reduce timeout to nothing since we may not * get a response from ypserv and we don't want to block. */ if (clnt_control(clnt, CLSET_TIMEOUT, (char *)&timeout) == FALSE) yp_error("failed to set timeout on ypproc_xfr call"); /* Invoke the ypproc_xfr service. */ if (ypproc_xfr_2(&req, clnt) == NULL) { clnt_geterr(clnt, &err); if (err.re_status != RPC_SUCCESS && err.re_status != RPC_TIMEDOUT) { yp_error("%s: %s", job->server, clnt_sperror(clnt, "yp_xfr failed")); job->stat = YPPUSH_YPSERV; clnt_destroy(clnt); return(1); } } clnt_destroy(clnt); return(0); } /* * Main driver function. Register the callback service, add the transfer * request to the internal list, send the YPPROC_XFR request to ypserv * do other magic things. */ static int yp_push(char *server, char *map, unsigned long tid) { unsigned long prognum; int sock = RPC_ANYSOCK; SVCXPRT *xprt; struct jobs *job; /* Register the job in our linked list of jobs. */ /* First allocate job structure */ if ((job = (struct jobs *)malloc(sizeof (struct jobs))) == NULL) { yp_error("malloc failed"); yppush_exit (1); } /* * Register the callback service on the first free transient * program number. */ xprt = svcudp_create(sock); for (prognum = 0x40000000; prognum < 0x5FFFFFFF; prognum++) { if (svc_register(xprt, prognum, 1, yppush_xfrrespprog_1, IPPROTO_UDP) == TRUE) break; } if (prognum == 0x5FFFFFFF) { yp_error ("can't register yppush_xfrrespprog_1"); yppush_exit (1); } /* Initialize the info for this job. */ job->stat = 0; job->tid = tid; job->port = xprt->xp_port; job->server = strdup(server); job->map = strdup(map); job->prognum = prognum; job->polled = 0; job->next = yppush_joblist; yppush_joblist = job; if (verbose) { yp_error("initiating transfer: %s -> %s (transid = %lu)", yppush_mapname, server, tid); } /* * Send the XFR request to ypserv. We don't have to wait for * a response here since we handle them asynchronously. */ if (yppush_send_xfr(job)){ /* Transfer request blew up. */ yppush_show_status(job->stat ? job->stat : YPPUSH_YPSERV,job->tid); } else { if (verbose > 1) yp_error("%s has been called", server); } return(0); } /* * Called for each entry in the ypservers map from yp_get_map(), which * is our private yp_all() routine. */ static int yppush_foreach(int status, char *key, int keylen, char *val, int vallen, char *data) { char *server; if (status != YP_TRUE) return (status); asprintf(&server, "%.*s", vallen, val); /* * Do not stop the iteration on the allocation failure. We * cannot usefully react on low memory condition anyway, and * the failure is more likely due to insane val. */ if (server == NULL) return (0); if (skip_master && strcasecmp(server, yppush_master) == 0) { free(server); return (0); } /* * Restrict the number of concurrent jobs: if yppush_jobs number * of jobs have already been dispatched and are still pending, * wait for one of them to finish so we can reuse its slot. */ while (yppush_running_jobs >= yppush_jobs && (yppush_svc_run (yppush_timeout) > 0)) ; /* Cleared for takeoff: set everything in motion. */ if (yp_push(server, yppush_mapname, yppush_transid)) { free(server); return(yp_errno); } /* Bump the job counter and transaction ID. */ yppush_running_jobs++; yppush_transid++; free(server); return (0); } static void usage() { fprintf (stderr, "%s\n%s\n", "usage: yppush [-d domain] [-t timeout] [-j #parallel jobs] [-h host]", " [-p path] mapname"); exit(1); } /* * Entry point. (About time!) */ int main(int argc, char *argv[]) { int ch; DBT key, data; char myname[MAXHOSTNAMELEN]; struct hostlist { char *name; struct hostlist *next; }; struct hostlist *yppush_hostlist = NULL; struct hostlist *tmp; while ((ch = getopt(argc, argv, "d:j:p:h:t:v")) != -1) { switch (ch) { case 'd': yppush_domain = optarg; break; case 'j': yppush_jobs = atoi(optarg); if (yppush_jobs <= 0) yppush_jobs = 1; break; case 'p': yp_dir = optarg; break; case 'h': /* we can handle multiple hosts */ if ((tmp = (struct hostlist *)malloc(sizeof(struct hostlist))) == NULL) { yp_error("malloc failed"); yppush_exit(1); } tmp->name = strdup(optarg); tmp->next = yppush_hostlist; yppush_hostlist = tmp; break; case 't': yppush_timeout = atoi(optarg); break; case 'v': verbose++; break; default: usage(); break; } } argc -= optind; argv += optind; yppush_mapname = argv[0]; if (yppush_mapname == NULL) { /* "No guts, no glory." */ usage(); } /* * If no domain was specified, try to find the default * domain. If we can't find that, we're doomed and must bail. */ if (yppush_domain == NULL) { char *yppush_check_domain; if (!yp_get_default_domain(&yppush_check_domain) && !_yp_check(&yppush_check_domain)) { yp_error("no domain specified and NIS not running"); usage(); } else yp_get_default_domain(&yppush_domain); } /* Check to see that we are the master for this map. */ if (gethostname ((char *)&myname, sizeof(myname))) { yp_error("failed to get name of local host: %s", strerror(errno)); yppush_exit(1); } key.data = "YP_MASTER_NAME"; key.size = sizeof("YP_MASTER_NAME") - 1; if (yp_get_record(yppush_domain, yppush_mapname, &key, &data, 1) != YP_TRUE) { yp_error("couldn't open %s map: %s", yppush_mapname, strerror(errno)); yppush_exit(1); } if (strncasecmp(myname, data.data, data.size) == 0) { /* I am master server, and no explicit host list was specified: do not push map to myself -- this will fail with YPPUSH_AGE anyway. */ if (yppush_hostlist == NULL) skip_master = 1; } else { yp_error("warning: this host is not the master for %s", yppush_mapname); #ifdef NITPICKY yppush_exit(1); #endif } yppush_master = malloc(data.size + 1); strncpy(yppush_master, data.data, data.size); yppush_master[data.size] = '\0'; /* Install some handy handlers. */ signal(SIGTERM, handler); signal(SIGINT, handler); /* set initial transaction ID */ yppush_transid = time((time_t *)NULL); if (yppush_hostlist) { /* * Host list was specified on the command line: * kick off the transfers by hand. */ tmp = yppush_hostlist; while (tmp) { yppush_foreach(YP_TRUE, NULL, 0, tmp->name, strlen(tmp->name), NULL); tmp = tmp->next; } } else { /* * Do a yp_all() on the ypservers map and initiate a ypxfr * for each one. */ ypxfr_get_map("ypservers", yppush_domain, "localhost", yppush_foreach); } if (verbose > 1) yp_error("all jobs dispatched"); /* All done -- normal exit. */ yppush_exit(0); /* Just in case. */ exit(0); }
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