usr.sbin/rpc.statd/statd.c

   1 /*
   2  * Copyright (c) 1995
   3  *      A.R. Gordon (andrew.gordon@net-tel.co.uk).  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed for the FreeBSD project
  16  * 4. Neither the name of the author nor the names of any co-contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY ANDREW GORDON AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  */
  33
  34 /* main() function for status monitor daemon.  Some of the code in this */
  35 /* file was generated by running rpcgen /usr/include/rpcsvc/sm_inter.x  */
  36 /* The actual program logic is in the file procs.c                      */
  37
  38 #include <sys/cdefs.h>
  39 __FBSDID("$FreeBSD$");
  40
  41 #include <err.h>
  42 #include <errno.h>
  43 #include <stdio.h>
  44 #include <stdlib.h>
  45 #include <rpc/rpc.h>
  46 #include <rpc/rpc_com.h>
  47 #include <string.h>
  48 #include <syslog.h>
  49 #include <sys/types.h>
  50 #include <sys/socket.h>
  51 #include <sys/wait.h>
  52 #include <netinet/in.h>
  53 #include <arpa/inet.h>
  54 #include <netdb.h>
  55 #include <signal.h>
  56 #include <unistd.h>
  57 #include "statd.h"
  58
  59 #define GETPORT_MAXTRY  20      /* Max tries to get a port # */
  60
  61 int debug = 0;          /* Controls syslog() calls for debug messages   */
  62
  63 char **hosts, *svcport_str = NULL;
  64 int nhosts = 0;
  65 int xcreated = 0;
  66 static int      mallocd_svcport = 0;
  67 static int      *sock_fd;
  68 static int      sock_fdcnt;
  69 static int      sock_fdpos;
  70
  71 static int      create_service(struct netconfig *nconf);
  72 static void     complete_service(struct netconfig *nconf, char *port_str);
  73 static void     clearout_service(void);
  74 static void handle_sigchld(int sig);
  75 void out_of_mem(void);
  76
  77 static void usage(void);
  78
  79 int
  80 main(int argc, char **argv)
  81 {
  82   struct sigaction sa;
  83   struct netconfig *nconf;
  84   void *nc_handle;
  85   in_port_t svcport;
  86   int ch, i, s;
  87   char *endptr, **hosts_bak;
  88   int have_v6 = 1;
  89   int maxrec = RPC_MAXDATASIZE;
  90   int attempt_cnt, port_len, port_pos, ret;
  91   char **port_list;
  92
  93   while ((ch = getopt(argc, argv, "dh:p:")) != -1)
  94     switch (ch) {
  95     case 'd':
  96       debug = 1;
  97       break;
  98     case 'h':
  99       ++nhosts;
 100       hosts_bak = hosts;
 101       hosts_bak = realloc(hosts, nhosts * sizeof(char *));
 102       if (hosts_bak == NULL) {
 103               if (hosts != NULL) {
 104                       for (i = 0; i < nhosts; i++)
 105                               free(hosts[i]);
 106                       free(hosts);
 107                       out_of_mem();
 108               }
 109       }
 110       hosts = hosts_bak;
 111       hosts[nhosts - 1] = strdup(optarg);
 112       if (hosts[nhosts - 1] == NULL) {
 113               for (i = 0; i < (nhosts - 1); i++)
 114                       free(hosts[i]);
 115               free(hosts);
 116               out_of_mem();
 117       }
 118       break;
 119     case 'p':
 120       endptr = NULL;
 121       svcport = (in_port_t)strtoul(optarg, &endptr, 10);
 122       if (endptr == NULL || *endptr != '\0' || svcport == 0 ||
 123           svcport >= IPPORT_MAX)
 124         usage();
 125
 126       svcport_str = strdup(optarg);
 127       break;
 128     default:
 129       usage();
 130     }
 131   argc -= optind;
 132   argv += optind;
 133
 134   (void)rpcb_unset(SM_PROG, SM_VERS, NULL);
 135
 136   /*
 137    * Check if IPv6 support is present.
 138    */
 139   s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP);
 140   if (s < 0)
 141       have_v6 = 0;
 142   else
 143       close(s);
 144
 145   rpc_control(RPC_SVC_CONNMAXREC_SET, &maxrec);
 146
 147   /*
 148    * If no hosts were specified, add a wildcard entry to bind to
 149    * INADDR_ANY. Otherwise make sure 127.0.0.1 and ::1 are added to the
 150    * list.
 151    */
 152   if (nhosts == 0) {
 153           hosts = malloc(sizeof(char**));
 154           if (hosts == NULL)
 155                   out_of_mem();
 156
 157           hosts[0] = "*";
 158           nhosts = 1;
 159   } else {
 160           hosts_bak = hosts;
 161           if (have_v6) {
 162                   hosts_bak = realloc(hosts, (nhosts + 2) *
 163                       sizeof(char *));
 164                   if (hosts_bak == NULL) {
 165                           for (i = 0; i < nhosts; i++)
 166                                   free(hosts[i]);
 167                           free(hosts);
 168                           out_of_mem();
 169                   } else
 170                           hosts = hosts_bak;
 171
 172                   nhosts += 2;
 173                   hosts[nhosts - 2] = "::1";
 174           } else {
 175                   hosts_bak = realloc(hosts, (nhosts + 1) * sizeof(char *));
 176                   if (hosts_bak == NULL) {
 177                           for (i = 0; i < nhosts; i++)
 178                                   free(hosts[i]);
 179
 180                           free(hosts);
 181                           out_of_mem();
 182                   } else {
 183                           nhosts += 1;
 184                           hosts = hosts_bak;
 185                   }
 186           }
 187           hosts[nhosts - 1] = "127.0.0.1";
 188   }
 189
 190   attempt_cnt = 1;
 191   sock_fdcnt = 0;
 192   sock_fd = NULL;
 193   port_list = NULL;
 194   port_len = 0;
 195   nc_handle = setnetconfig();
 196   while ((nconf = getnetconfig(nc_handle))) {
 197           /* We want to listen only on udp6, tcp6, udp, tcp transports */
 198           if (nconf->nc_flag & NC_VISIBLE) {
 199                   /* Skip if there's no IPv6 support */
 200                   if (have_v6 == 0 && strcmp(nconf->nc_protofmly, "inet6") == 0) {
 201               /* DO NOTHING */
 202                   } else {
 203                         ret = create_service(nconf);
 204                         if (ret == 1)
 205                                 /* Ignore this call */
 206                                 continue;
 207                         if (ret < 0) {
 208                                 /*
 209                                  * Failed to bind port, so close off
 210                                  * all sockets created and try again
 211                                  * if the port# was dynamically
 212                                  * assigned via bind(2).
 213                                  */
 214                                 clearout_service();
 215                                 if (mallocd_svcport != 0 &&
 216                                     attempt_cnt < GETPORT_MAXTRY) {
 217                                         free(svcport_str);
 218                                         svcport_str = NULL;
 219                                         mallocd_svcport = 0;
 220                                 } else {
 221                                         errno = EADDRINUSE;
 222                                         syslog(LOG_ERR,
 223                                             "bindresvport_sa: %m");
 224                                         exit(1);
 225                                 }
 226
 227                                 /* Start over at the first service. */
 228                                 free(sock_fd);
 229                                 sock_fdcnt = 0;
 230                                 sock_fd = NULL;
 231                                 nc_handle = setnetconfig();
 232                                 attempt_cnt++;
 233                         } else if (mallocd_svcport != 0 &&
 234                             attempt_cnt == GETPORT_MAXTRY) {
 235                                 /*
 236                                  * For the last attempt, allow
 237                                  * different port #s for each nconf
 238                                  * by saving the svcport_str and
 239                                  * setting it back to NULL.
 240                                  */
 241                                 port_list = realloc(port_list,
 242                                     (port_len + 1) * sizeof(char *));
 243                                 if (port_list == NULL)
 244                                         out_of_mem();
 245                                 port_list[port_len++] = svcport_str;
 246                                 svcport_str = NULL;
 247                                 mallocd_svcport = 0;
 248                         }
 249                   }
 250           }
 251   }
 252
 253   /*
 254    * Successfully bound the ports, so call complete_service() to
 255    * do the rest of the setup on the service(s).
 256    */
 257   sock_fdpos = 0;
 258   port_pos = 0;
 259   nc_handle = setnetconfig();
 260   while ((nconf = getnetconfig(nc_handle))) {
 261           /* We want to listen only on udp6, tcp6, udp, tcp transports */
 262           if (nconf->nc_flag & NC_VISIBLE) {
 263                   /* Skip if there's no IPv6 support */
 264                   if (have_v6 == 0 && strcmp(nconf->nc_protofmly, "inet6") == 0) {
 265               /* DO NOTHING */
 266                   } else if (port_list != NULL) {
 267                         if (port_pos >= port_len) {
 268                                 syslog(LOG_ERR, "too many port#s");
 269                                 exit(1);
 270                         }
 271                         complete_service(nconf, port_list[port_pos++]);
 272                   } else
 273                         complete_service(nconf, svcport_str);
 274           }
 275   }
 276   endnetconfig(nc_handle);
 277   free(sock_fd);
 278   if (port_list != NULL) {
 279         for (port_pos = 0; port_pos < port_len; port_pos++)
 280                 free(port_list[port_pos]);
 281         free(port_list);
 282   }
 283
 284   init_file("/var/db/statd.status");
 285
 286   /* Note that it is NOT sensible to run this program from inetd - the  */
 287   /* protocol assumes that it will run immediately at boot time.        */
 288   daemon(0, 0);
 289   openlog("rpc.statd", 0, LOG_DAEMON);
 290   if (debug) syslog(LOG_INFO, "Starting - debug enabled");
 291   else syslog(LOG_INFO, "Starting");
 292
 293   /* Install signal handler to collect exit status of child processes   */
 294   sa.sa_handler = handle_sigchld;
 295   sigemptyset(&sa.sa_mask);
 296   sigaddset(&sa.sa_mask, SIGCHLD);
 297   sa.sa_flags = SA_RESTART;
 298   sigaction(SIGCHLD, &sa, NULL);
 299
 300   /* Initialisation now complete - start operating                      */
 301   notify_hosts();       /* Forks a process (if necessary) to do the     */
 302                         /* SM_NOTIFY calls, which may be slow.          */
 303
 304   svc_run();    /* Should never return                                  */
 305   exit(1);
 306 }
 307
 308 /*
 309  * This routine creates and binds sockets on the appropriate
 310  * addresses. It gets called one time for each transport.
 311  * It returns 0 upon success, 1 for ingore the call and -1 to indicate
 312  * bind failed with EADDRINUSE.
 313  * Any file descriptors that have been created are stored in sock_fd and
 314  * the total count of them is maintained in sock_fdcnt.
 315  */
 316 static int
 317 create_service(struct netconfig *nconf)
 318 {
 319         struct addrinfo hints, *res = NULL;
 320         struct sockaddr_in *sin;
 321         struct sockaddr_in6 *sin6;
 322         struct __rpc_sockinfo si;
 323         int aicode;
 324         int fd;
 325         int nhostsbak;
 326         int r;
 327         u_int32_t host_addr[4];  /* IPv4 or IPv6 */
 328         int mallocd_res;
 329
 330         if ((nconf->nc_semantics != NC_TPI_CLTS) &&
 331             (nconf->nc_semantics != NC_TPI_COTS) &&
 332             (nconf->nc_semantics != NC_TPI_COTS_ORD))
 333                 return (1);     /* not my type */
 334
 335         /*
 336          * XXX - using RPC library internal functions.
 337          */
 338         if (!__rpc_nconf2sockinfo(nconf, &si)) {
 339                 syslog(LOG_ERR, "cannot get information for %s",
 340                     nconf->nc_netid);
 341                 return (1);
 342         }
 343
 344         /* Get rpc.statd's address on this transport */
 345         memset(&hints, 0, sizeof hints);
 346         hints.ai_flags = AI_PASSIVE;
 347         hints.ai_family = si.si_af;
 348         hints.ai_socktype = si.si_socktype;
 349         hints.ai_protocol = si.si_proto;
 350
 351         /*
 352          * Bind to specific IPs if asked to
 353          */
 354         nhostsbak = nhosts;
 355         while (nhostsbak > 0) {
 356                 --nhostsbak;
 357                 sock_fd = realloc(sock_fd, (sock_fdcnt + 1) * sizeof(int));
 358                 if (sock_fd == NULL)
 359                         out_of_mem();
 360                 sock_fd[sock_fdcnt++] = -1;     /* Set invalid for now. */
 361                 mallocd_res = 0;
 362
 363                 /*
 364                  * XXX - using RPC library internal functions.
 365                  */
 366                 if ((fd = __rpc_nconf2fd(nconf)) < 0) {
 367                         syslog(LOG_ERR, "cannot create socket for %s",
 368                             nconf->nc_netid);
 369                         continue;
 370                 }
 371                 switch (hints.ai_family) {
 372                 case AF_INET:
 373                         if (inet_pton(AF_INET, hosts[nhostsbak],
 374                             host_addr) == 1) {
 375                                 hints.ai_flags |= AI_NUMERICHOST;
 376                         } else {
 377                                 /*
 378                                  * Skip if we have an AF_INET6 address.
 379                                  */
 380                                 if (inet_pton(AF_INET6, hosts[nhostsbak],
 381                                     host_addr) == 1) {
 382                                         close(fd);
 383                                         continue;
 384                                 }
 385                         }
 386                         break;
 387                 case AF_INET6:
 388                         if (inet_pton(AF_INET6, hosts[nhostsbak],
 389                             host_addr) == 1) {
 390                                 hints.ai_flags |= AI_NUMERICHOST;
 391                         } else {
 392                                 /*
 393                                  * Skip if we have an AF_INET address.
 394                                  */
 395                                 if (inet_pton(AF_INET, hosts[nhostsbak],
 396                                     host_addr) == 1) {
 397                                         close(fd);
 398                                         continue;
 399                                 }
 400                         }
 401                         break;
 402                 default:
 403                         break;
 404                 }
 405
 406                 /*
 407                  * If no hosts were specified, just bind to INADDR_ANY
 408                  */
 409                 if (strcmp("*", hosts[nhostsbak]) == 0) {
 410                         if (svcport_str == NULL) {
 411                                 res = malloc(sizeof(struct addrinfo));
 412                                 if (res == NULL)
 413                                         out_of_mem();
 414                                 mallocd_res = 1;
 415                                 res->ai_flags = hints.ai_flags;
 416                                 res->ai_family = hints.ai_family;
 417                                 res->ai_protocol = hints.ai_protocol;
 418                                 switch (res->ai_family) {
 419                                 case AF_INET:
 420                                         sin = malloc(sizeof(struct sockaddr_in));
 421                                         if (sin == NULL)
 422                                                 out_of_mem();
 423                                         sin->sin_family = AF_INET;
 424                                         sin->sin_port = htons(0);
 425                                         sin->sin_addr.s_addr = htonl(INADDR_ANY);
 426                                         res->ai_addr = (struct sockaddr*) sin;
 427                                         res->ai_addrlen = (socklen_t)
 428                                             sizeof(struct sockaddr_in);
 429                                         break;
 430                                 case AF_INET6:
 431                                         sin6 = malloc(sizeof(struct sockaddr_in6));
 432                                         if (sin6 == NULL)
 433                                                 out_of_mem();
 434                                         sin6->sin6_family = AF_INET6;
 435                                         sin6->sin6_port = htons(0);
 436                                         sin6->sin6_addr = in6addr_any;
 437                                         res->ai_addr = (struct sockaddr*) sin6;
 438                                         res->ai_addrlen = (socklen_t)
 439                                             sizeof(struct sockaddr_in6);
 440                                         break;
 441                                 default:
 442                                         syslog(LOG_ERR, "bad addr fam %d",
 443                                             res->ai_family);
 444                                         exit(1);
 445                                 }
 446                         } else {
 447                                 if ((aicode = getaddrinfo(NULL, svcport_str,
 448                                     &hints, &res)) != 0) {
 449                                         syslog(LOG_ERR,
 450                                             "cannot get local address for %s: %s",
 451                                             nconf->nc_netid,
 452                                             gai_strerror(aicode));
 453                                         close(fd);
 454                                         continue;
 455                                 }
 456                         }
 457                 } else {
 458                         if ((aicode = getaddrinfo(hosts[nhostsbak], svcport_str,
 459                             &hints, &res)) != 0) {
 460                                 syslog(LOG_ERR,
 461                                     "cannot get local address for %s: %s",
 462                                     nconf->nc_netid, gai_strerror(aicode));
 463                                 close(fd);
 464                                 continue;
 465                         }
 466                 }
 467
 468                 /* Store the fd. */
 469                 sock_fd[sock_fdcnt - 1] = fd;
 470
 471                 /* Now, attempt the bind. */
 472                 r = bindresvport_sa(fd, res->ai_addr);
 473                 if (r != 0) {
 474                         if (errno == EADDRINUSE && mallocd_svcport != 0) {
 475                                 if (mallocd_res != 0) {
 476                                         free(res->ai_addr);
 477                                         free(res);
 478                                 } else
 479                                         freeaddrinfo(res);
 480                                 return (-1);
 481                         }
 482                         syslog(LOG_ERR, "bindresvport_sa: %m");
 483                         exit(1);
 484                 }
 485
 486                 if (svcport_str == NULL) {
 487                         svcport_str = malloc(NI_MAXSERV * sizeof(char));
 488                         if (svcport_str == NULL)
 489                                 out_of_mem();
 490                         mallocd_svcport = 1;
 491
 492                         if (getnameinfo(res->ai_addr,
 493                             res->ai_addr->sa_len, NULL, NI_MAXHOST,
 494                             svcport_str, NI_MAXSERV * sizeof(char),
 495                             NI_NUMERICHOST | NI_NUMERICSERV))
 496                                 errx(1, "Cannot get port number");
 497                 }
 498                 if (mallocd_res != 0) {
 499                         free(res->ai_addr);
 500                         free(res);
 501                 } else
 502                         freeaddrinfo(res);
 503                 res = NULL;
 504         }
 505         return (0);
 506 }
 507
 508 /*
 509  * Called after all the create_service() calls have succeeded, to complete
 510  * the setup and registration.
 511  */
 512 static void
 513 complete_service(struct netconfig *nconf, char *port_str)
 514 {
 515         struct addrinfo hints, *res = NULL;
 516         struct __rpc_sockinfo si;
 517         struct netbuf servaddr;
 518         SVCXPRT *transp = NULL;
 519         int aicode, fd, nhostsbak;
 520         int registered = 0;
 521
 522         if ((nconf->nc_semantics != NC_TPI_CLTS) &&
 523             (nconf->nc_semantics != NC_TPI_COTS) &&
 524             (nconf->nc_semantics != NC_TPI_COTS_ORD))
 525                 return; /* not my type */
 526
 527         /*
 528          * XXX - using RPC library internal functions.
 529          */
 530         if (!__rpc_nconf2sockinfo(nconf, &si)) {
 531                 syslog(LOG_ERR, "cannot get information for %s",
 532                     nconf->nc_netid);
 533                 return;
 534         }
 535
 536         nhostsbak = nhosts;
 537         while (nhostsbak > 0) {
 538                 --nhostsbak;
 539                 if (sock_fdpos >= sock_fdcnt) {
 540                         /* Should never happen. */
 541                         syslog(LOG_ERR, "Ran out of socket fd's");
 542                         return;
 543                 }
 544                 fd = sock_fd[sock_fdpos++];
 545                 if (fd < 0)
 546                         continue;
 547
 548                 if (nconf->nc_semantics != NC_TPI_CLTS)
 549                         listen(fd, SOMAXCONN);
 550
 551                 transp = svc_tli_create(fd, nconf, NULL,
 552                 RPC_MAXDATASIZE, RPC_MAXDATASIZE);
 553
 554                 if (transp != (SVCXPRT *) NULL) {
 555                         if (!svc_register(transp, SM_PROG, SM_VERS,
 556                             sm_prog_1, 0)) {
 557                                 syslog(LOG_ERR, "can't register on %s",
 558                                     nconf->nc_netid);
 559                         } else {
 560                                 if (!svc_reg(transp, SM_PROG, SM_VERS,
 561                                     sm_prog_1, NULL))
 562                                         syslog(LOG_ERR,
 563                                             "can't register %s SM_PROG service",
 564                                             nconf->nc_netid);
 565                         }
 566                 } else
 567                         syslog(LOG_WARNING, "can't create %s services",
 568                             nconf->nc_netid);
 569
 570                 if (registered == 0) {
 571                         registered = 1;
 572                         memset(&hints, 0, sizeof hints);
 573                         hints.ai_flags = AI_PASSIVE;
 574                         hints.ai_family = si.si_af;
 575                         hints.ai_socktype = si.si_socktype;
 576                         hints.ai_protocol = si.si_proto;
 577
 578
 579                         if ((aicode = getaddrinfo(NULL, port_str, &hints,
 580                             &res)) != 0) {
 581                                 syslog(LOG_ERR, "cannot get local address: %s",
 582                                     gai_strerror(aicode));
 583                                 exit(1);
 584                         }
 585
 586                         servaddr.buf = malloc(res->ai_addrlen);
 587                         memcpy(servaddr.buf, res->ai_addr, res->ai_addrlen);
 588                         servaddr.len = res->ai_addrlen;
 589
 590                         rpcb_set(SM_PROG, SM_VERS, nconf, &servaddr);
 591
 592                         xcreated++;
 593                         freeaddrinfo(res);
 594                 }
 595         } /* end while */
 596 }
 597
 598 /*
 599  * Clear out sockets after a failure to bind one of them, so that the
 600  * cycle of socket creation/binding can start anew.
 601  */
 602 static void
 603 clearout_service(void)
 604 {
 605         int i;
 606
 607         for (i = 0; i < sock_fdcnt; i++) {
 608                 if (sock_fd[i] >= 0) {
 609                         shutdown(sock_fd[i], SHUT_RDWR);
 610                         close(sock_fd[i]);
 611                 }
 612         }
 613 }
 614
 615 static void
 616 usage()
 617 {
 618       fprintf(stderr, "usage: rpc.statd [-d] [-h <bindip>] [-p <port>]\n");
 619       exit(1);
 620 }
 621
 622 /* handle_sigchld ---------------------------------------------------------- */
 623 /*
 624    Purpose:     Catch SIGCHLD and collect process status
 625    Retruns:     Nothing.
 626    Notes:       No special action required, other than to collect the
 627                 process status and hence allow the child to die:
 628                 we only use child processes for asynchronous transmission
 629                 of SM_NOTIFY to other systems, so it is normal for the
 630                 children to exit when they have done their work.
 631 */
 632
 633 static void handle_sigchld(int sig __unused)
 634 {
 635   int pid, status;
 636   pid = wait4(-1, &status, WNOHANG, (struct rusage*)0);
 637   if (!pid) syslog(LOG_ERR, "Phantom SIGCHLD??");
 638   else if (status == 0)
 639   {
 640     if (debug) syslog(LOG_DEBUG, "Child %d exited OK", pid);
 641   }
 642   else syslog(LOG_ERR, "Child %d failed with status %d", pid,
 643     WEXITSTATUS(status));
 644 }
 645
 646 /*
 647  * Out of memory, fatal
 648  */
 649 void
 650 out_of_mem()
 651 {
 652
 653         syslog(LOG_ERR, "out of memory");
 654         exit(2);
 655 }