nss/getent.c

   1 /* Copyright (c) 1998-2003, 2004, 2005, 2006 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Thorsten Kukuk <kukuk@suse.de>, 1998.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 /* getent: get entries from administrative database.  */
  21
  22 #include <aliases.h>
  23 #include <argp.h>
  24 #include <ctype.h>
  25 #include <error.h>
  26 #include <grp.h>
  27 #include <libintl.h>
  28 #include <locale.h>
  29 #include <mcheck.h>
  30 #include <netdb.h>
  31 #include <pwd.h>
  32 #include <shadow.h>
  33 #include <stdio.h>
  34 #include <stdlib.h>
  35 #include <string.h>
  36 #include <arpa/inet.h>
  37 #include <arpa/nameser.h>
  38 #include <netinet/ether.h>
  39 #include <netinet/in.h>
  40 #include <sys/socket.h>
  41
  42 /* Get libc version number.  */
  43 #include <version.h>
  44
  45 #define PACKAGE _libc_intl_domainname
  46
  47 /* Name and version of program.  */
  48 static void print_version (FILE *stream, struct argp_state *state);
  49 void (*argp_program_version_hook) (FILE *, struct argp_state *) = print_version;
  50
  51 /* Short description of parameters.  */
  52 static const char args_doc[] = N_("database [key ...]");
  53
  54 /* Supported options. */
  55 static const struct argp_option args_options[] =
  56   {
  57     { "service", 's', "CONFIG", 0, N_("Service configuration to be used") },
  58     { NULL, 0, NULL, 0, NULL },
  59   };
  60
  61 /* Short description of program.  */
  62 static const char doc[] = N_("Get entries from administrative database.\v\
  63 For bug reporting instructions, please see:\n\
  64 <http://www.gnu.org/software/libc/bugs.html>.\n");
  65
  66 /* Prototype for option handler.  */
  67 static error_t parse_option (int key, char *arg, struct argp_state *state);
  68
  69 /* Function to print some extra text in the help message.  */
  70 static char *more_help (int key, const char *text, void *input);
  71
  72 /* Data structure to communicate with argp functions.  */
  73 static struct argp argp =
  74   {
  75     args_options, parse_option, args_doc, doc, NULL, more_help
  76   };
  77
  78 /* Print the version information.  */
  79 static void
  80 print_version (FILE *stream, struct argp_state *state)
  81 {
  82   fprintf (stream, "getent (GNU %s) %s\n", PACKAGE, VERSION);
  83   fprintf (stream, gettext ("\
  84 Copyright (C) %s Free Software Foundation, Inc.\n\
  85 This is free software; see the source for copying conditions.  There is NO\n\
  86 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\
  87 "), "2006");
  88   fprintf (stream, gettext ("Written by %s.\n"), "Thorsten Kukuk");
  89 }
  90
  91 /* This is for aliases */
  92 static inline void
  93 print_aliases (struct aliasent *alias)
  94 {
  95   unsigned int i = 0;
  96
  97   printf ("%s: ", alias->alias_name);
  98   for  (i = strlen (alias->alias_name); i < 14; ++i)
  99     fputs_unlocked (" ", stdout);
 100
 101   for (i = 0; i < alias->alias_members_len; ++i)
 102     printf ("%s%s",
 103             alias->alias_members [i],
 104             i + 1 == alias->alias_members_len ? "\n" : ", ");
 105 }
 106
 107 static int
 108 aliases_keys (int number, char *key[])
 109 {
 110   int result = 0;
 111   int i;
 112   struct aliasent *alias;
 113
 114   if (number == 0)
 115     {
 116       setaliasent ();
 117       while ((alias = getaliasent ()) != NULL)
 118         print_aliases (alias);
 119       endaliasent ();
 120       return result;
 121     }
 122
 123   for (i = 0; i < number; ++i)
 124     {
 125       alias = getaliasbyname (key[i]);
 126
 127       if (alias == NULL)
 128         result = 2;
 129       else
 130         print_aliases (alias);
 131     }
 132
 133   return result;
 134 }
 135
 136 /* This is for ethers */
 137 static int
 138 ethers_keys (int number, char *key[])
 139 {
 140   int result = 0;
 141   int i;
 142
 143   if (number == 0)
 144     {
 145       fprintf (stderr, _("Enumeration not supported on %s\n"), "ethers");
 146       return 3;
 147     }
 148
 149   for (i = 0; i < number; ++i)
 150     {
 151       struct ether_addr *ethp, eth;
 152       char buffer [1024], *p;
 153
 154       ethp = ether_aton (key[i]);
 155       if (ethp != NULL)
 156         {
 157           if (ether_ntohost (buffer, ethp))
 158             {
 159               result = 2;
 160               continue;
 161             }
 162           p = buffer;
 163         }
 164       else
 165         {
 166           if (ether_hostton (key[i], &eth))
 167             {
 168               result = 2;
 169               continue;
 170             }
 171           p = key[i];
 172           ethp = &eth;
 173         }
 174       printf ("%s %s\n", ether_ntoa (ethp), p);
 175     }
 176
 177   return result;
 178 }
 179
 180 /* This is for group */
 181 static inline void
 182 print_group (struct group *grp)
 183 {
 184   unsigned int i = 0;
 185
 186   printf ("%s:%s:%lu:", grp->gr_name ? grp->gr_name : "",
 187           grp->gr_passwd ? grp->gr_passwd : "",
 188           (unsigned long int) grp->gr_gid);
 189
 190   while (grp->gr_mem[i] != NULL)
 191     {
 192       fputs_unlocked (grp->gr_mem[i], stdout);
 193       ++i;
 194       if (grp->gr_mem[i] != NULL)
 195         putchar_unlocked (',');
 196     }
 197   putchar_unlocked ('\n');
 198 }
 199
 200 static int
 201 group_keys (int number, char *key[])
 202 {
 203   int result = 0;
 204   int i;
 205   struct group *grp;
 206
 207   if (number == 0)
 208     {
 209       setgrent ();
 210       while ((grp = getgrent ()) != NULL)
 211         print_group (grp);
 212       endgrent ();
 213       return result;
 214     }
 215
 216   for (i = 0; i < number; ++i)
 217     {
 218       errno = 0;
 219       char *ep;
 220       gid_t arg_gid = strtoul(key[i], &ep, 10);
 221
 222       if (errno != EINVAL && *key[i] != '\0' && *ep == '\0')
 223         /* Valid numeric gid.  */
 224         grp = getgrgid (arg_gid);
 225       else
 226         grp = getgrnam (key[i]);
 227
 228       if (grp == NULL)
 229         result = 2;
 230       else
 231         print_group (grp);
 232     }
 233
 234   return result;
 235 }
 236
 237 /* This is for hosts */
 238 static void
 239 print_hosts (struct hostent *host)
 240 {
 241   unsigned int cnt;
 242
 243   for (cnt = 0; host->h_addr_list[cnt] != NULL; ++cnt)
 244     {
 245       char buf[INET6_ADDRSTRLEN];
 246       const char *ip = inet_ntop (host->h_addrtype, host->h_addr_list[cnt],
 247                                   buf, sizeof (buf));
 248
 249       printf ("%-15s %s", ip, host->h_name);
 250
 251       unsigned int i;
 252       for (i = 0; host->h_aliases[i] != NULL; ++i)
 253         {
 254           putchar_unlocked (' ');
 255           fputs_unlocked (host->h_aliases[i], stdout);
 256         }
 257       putchar_unlocked ('\n');
 258     }
 259 }
 260
 261 static int
 262 hosts_keys (int number, char *key[])
 263 {
 264   int result = 0;
 265   int i;
 266   struct hostent *host;
 267
 268   if (number == 0)
 269     {
 270       sethostent (0);
 271       while ((host = gethostent ()) != NULL)
 272         print_hosts (host);
 273       endhostent ();
 274       return result;
 275     }
 276
 277   for (i = 0; i < number; ++i)
 278     {
 279       struct hostent *host = NULL;
 280       char addr[IN6ADDRSZ];
 281
 282       if (inet_pton (AF_INET6, key[i], &addr) > 0)
 283         host = gethostbyaddr (addr, IN6ADDRSZ, AF_INET6);
 284       else if (inet_pton (AF_INET, key[i], &addr) > 0)
 285         host = gethostbyaddr (addr, INADDRSZ, AF_INET);
 286       else if ((host = gethostbyname2 (key[i], AF_INET6)) == NULL)
 287         host = gethostbyname2 (key[i], AF_INET);
 288
 289       if (host == NULL)
 290         result = 2;
 291       else
 292         print_hosts (host);
 293     }
 294
 295   return result;
 296 }
 297
 298 /* This is for hosts, but using getaddrinfo */
 299 static int
 300 ahosts_keys_int (int af, int xflags, int number, char *key[])
 301 {
 302   int result = 0;
 303   int i;
 304   struct hostent *host;
 305
 306   if (number == 0)
 307     {
 308       sethostent (0);
 309       while ((host = gethostent ()) != NULL)
 310         print_hosts (host);
 311       endhostent ();
 312       return result;
 313     }
 314
 315   struct addrinfo hint;
 316   memset (&hint, '\0', sizeof (hint));
 317   hint.ai_flags = AI_V4MAPPED | AI_ADDRCONFIG | AI_CANONNAME | xflags;
 318   hint.ai_family = af;
 319
 320   for (i = 0; i < number; ++i)
 321     {
 322       struct addrinfo *res;
 323
 324       if (getaddrinfo (key[i], NULL, &hint, &res) != 0)
 325         result = 2;
 326       else
 327         {
 328           struct addrinfo *runp = res;
 329
 330           while (runp != NULL)
 331             {
 332               char sockbuf[20];
 333               const char *sockstr;
 334               if (runp->ai_socktype == SOCK_STREAM)
 335                 sockstr = "STREAM";
 336               else if (runp->ai_socktype == SOCK_DGRAM)
 337                 sockstr = "DGRAM";
 338               else if (runp->ai_socktype == SOCK_RAW)
 339                 sockstr = "RAW";
 340               else
 341                 {
 342                   snprintf (sockbuf, sizeof (sockbuf), "%d",
 343                             runp->ai_socktype);
 344                   sockstr = sockbuf;
 345                 }
 346
 347               char buf[INET6_ADDRSTRLEN];
 348               printf ("%-15s %-6s %s\n",
 349                       inet_ntop (runp->ai_family,
 350                                  runp->ai_family == AF_INET
 351                                  ? (void *) &((struct sockaddr_in *) runp->ai_addr)->sin_addr
 352                                  : (void *) &((struct sockaddr_in6 *) runp->ai_addr)->sin6_addr,
 353                                  buf, sizeof (buf)),
 354                       sockstr,
 355                       runp->ai_canonname ?: "");
 356
 357               runp = runp->ai_next;
 358             }
 359
 360           freeaddrinfo (res);
 361         }
 362     }
 363
 364   return result;
 365 }
 366
 367 static int
 368 ahosts_keys (int number, char *key[])
 369 {
 370   return ahosts_keys_int (AF_UNSPEC, 0, number, key);
 371 }
 372
 373 static int
 374 ahostsv4_keys (int number, char *key[])
 375 {
 376   return ahosts_keys_int (AF_INET, 0, number, key);
 377 }
 378
 379 static int
 380 ahostsv6_keys (int number, char *key[])
 381 {
 382   return ahosts_keys_int (AF_INET6, AI_V4MAPPED, number, key);
 383 }
 384
 385 /* This is for netgroup */
 386 static int
 387 netgroup_keys (int number, char *key[])
 388 {
 389   int result = 0;
 390   int i;
 391
 392   if (number == 0)
 393     {
 394       fprintf (stderr, _("Enumeration not supported on %s\n"), "netgroup");
 395       return 3;
 396     }
 397
 398   for (i = 0; i < number; ++i)
 399     {
 400       if (!setnetgrent (key[i]))
 401         result = 2;
 402       else
 403         {
 404           char *p[3];
 405
 406           printf ("%-21s", key[i]);
 407
 408           while (getnetgrent (p, p + 1, p + 2))
 409             printf (" (%s, %s, %s)", p[0] ?: " ", p[1] ?: "", p[2] ?: "");
 410           putchar_unlocked ('\n');
 411         }
 412     }
 413
 414   endnetgrent ();
 415
 416   return result;
 417 }
 418
 419 /* This is for networks */
 420 static void
 421 print_networks (struct netent *net)
 422 {
 423   unsigned int i;
 424   struct in_addr ip;
 425   ip.s_addr = htonl (net->n_net);
 426
 427   printf ("%-21s %s", net->n_name, inet_ntoa (ip));
 428
 429   i = 0;
 430   while (net->n_aliases[i] != NULL)
 431     {
 432       putchar_unlocked (' ');
 433       fputs_unlocked (net->n_aliases[i], stdout);
 434       ++i;
 435       if (net->n_aliases[i] != NULL)
 436         putchar_unlocked (',');
 437     }
 438   putchar_unlocked ('\n');
 439 }
 440
 441 static int
 442 networks_keys (int number, char *key[])
 443 {
 444   int result = 0;
 445   int i;
 446   struct netent *net;
 447
 448   if (number == 0)
 449     {
 450       setnetent (0);
 451       while ((net = getnetent ()) != NULL)
 452         print_networks (net);
 453       endnetent ();
 454       return result;
 455     }
 456
 457   for (i = 0; i < number; ++i)
 458     {
 459       if (isdigit (key[i][0]))
 460         net = getnetbyaddr (inet_addr (key[i]), AF_UNIX);
 461       else
 462         net = getnetbyname (key[i]);
 463
 464       if (net == NULL)
 465         result = 2;
 466       else
 467         print_networks (net);
 468     }
 469
 470   return result;
 471 }
 472
 473 /* Now is all for passwd */
 474 static inline void
 475 print_passwd (struct passwd *pwd)
 476 {
 477   printf ("%s:%s:%lu:%lu:%s:%s:%s\n",
 478           pwd->pw_name ? pwd->pw_name : "",
 479           pwd->pw_passwd ? pwd->pw_passwd : "",
 480           (unsigned long int) pwd->pw_uid,
 481           (unsigned long int) pwd->pw_gid,
 482           pwd->pw_gecos ? pwd->pw_gecos : "",
 483           pwd->pw_dir ? pwd->pw_dir : "",
 484           pwd->pw_shell ? pwd->pw_shell : "");
 485 }
 486
 487 static int
 488 passwd_keys (int number, char *key[])
 489 {
 490   int result = 0;
 491   int i;
 492   struct passwd *pwd;
 493
 494   if (number == 0)
 495     {
 496       setpwent ();
 497       while ((pwd = getpwent ()) != NULL)
 498         print_passwd (pwd);
 499       endpwent ();
 500       return result;
 501     }
 502
 503   for (i = 0; i < number; ++i)
 504     {
 505       errno = 0;
 506       char *ep;
 507       uid_t arg_uid = strtoul(key[i], &ep, 10);
 508
 509       if (errno != EINVAL && *key[i] != '\0' && *ep == '\0')
 510         /* Valid numeric uid.  */
 511         pwd = getpwuid (arg_uid);
 512       else
 513         pwd = getpwnam (key[i]);
 514
 515       if (pwd == NULL)
 516         result = 2;
 517       else
 518         print_passwd (pwd);
 519     }
 520
 521   return result;
 522 }
 523
 524 /* This is for protocols */
 525 static inline void
 526 print_protocols (struct protoent *proto)
 527 {
 528   unsigned int i;
 529
 530   printf ("%-21s %d", proto->p_name, proto->p_proto);
 531
 532   i = 0;
 533   while (proto->p_aliases[i] != NULL)
 534     {
 535       putchar_unlocked (' ');
 536       fputs_unlocked (proto->p_aliases[i], stdout);
 537       ++i;
 538     }
 539   putchar_unlocked ('\n');
 540 }
 541
 542 static int
 543 protocols_keys (int number, char *key[])
 544 {
 545   int result = 0;
 546   int i;
 547   struct protoent *proto;
 548
 549   if (number == 0)
 550     {
 551       setprotoent (0);
 552       while ((proto = getprotoent ()) != NULL)
 553         print_protocols (proto);
 554       endprotoent ();
 555       return result;
 556     }
 557
 558   for (i = 0; i < number; ++i)
 559     {
 560       if (isdigit (key[i][0]))
 561         proto = getprotobynumber (atol (key[i]));
 562       else
 563         proto = getprotobyname (key[i]);
 564
 565       if (proto == NULL)
 566         result = 2;
 567       else
 568         print_protocols (proto);
 569     }
 570
 571   return result;
 572 }
 573
 574 /* Now is all for rpc */
 575 static inline void
 576 print_rpc (struct rpcent *rpc)
 577 {
 578   int i;
 579
 580   printf ("%-15s %d%s",
 581           rpc->r_name, rpc->r_number, rpc->r_aliases[0] ? " " : "");
 582
 583   for (i = 0; rpc->r_aliases[i]; ++i)
 584     printf (" %s", rpc->r_aliases[i]);
 585   putchar_unlocked ('\n');
 586 }
 587
 588 static int
 589 rpc_keys (int number, char *key[])
 590 {
 591   int result = 0;
 592   int i;
 593   struct rpcent *rpc;
 594
 595   if (number == 0)
 596     {
 597       setrpcent (0);
 598       while ((rpc = getrpcent ()) != NULL)
 599         print_rpc (rpc);
 600       endrpcent ();
 601       return result;
 602     }
 603
 604   for (i = 0; i < number; ++i)
 605     {
 606       if (isdigit (key[i][0]))
 607         rpc = getrpcbynumber (atol (key[i]));
 608       else
 609         rpc = getrpcbyname (key[i]);
 610
 611       if (rpc == NULL)
 612         result = 2;
 613       else
 614         print_rpc (rpc);
 615     }
 616
 617   return result;
 618 }
 619
 620 /* for services */
 621 static void
 622 print_services (struct servent *serv)
 623 {
 624   unsigned int i;
 625
 626   printf ("%-21s %d/%s", serv->s_name, ntohs (serv->s_port), serv->s_proto);
 627
 628   i = 0;
 629   while (serv->s_aliases[i] != NULL)
 630     {
 631       putchar_unlocked (' ');
 632       fputs_unlocked (serv->s_aliases[i], stdout);
 633       ++i;
 634     }
 635   putchar_unlocked ('\n');
 636 }
 637
 638 static int
 639 services_keys (int number, char *key[])
 640 {
 641   int result = 0;
 642   int i;
 643   struct servent *serv;
 644
 645   if (!number)
 646     {
 647       setservent (0);
 648       while ((serv = getservent ()) != NULL)
 649         print_services (serv);
 650       endservent ();
 651       return result;
 652     }
 653
 654   for (i = 0; i < number; ++i)
 655     {
 656       struct servent *serv;
 657       char *proto = strchr (key[i], '/');
 658
 659       if (proto != NULL)
 660         *proto++ = '\0';
 661
 662       if (isdigit (key[i][0]))
 663         serv = getservbyport (htons (atol (key[i])), proto);
 664       else
 665         serv = getservbyname (key[i], proto);
 666
 667       if (serv == NULL)
 668         result = 2;
 669       else
 670         print_services (serv);
 671     }
 672
 673   return result;
 674 }
 675
 676 /* This is for shadow */
 677 static void
 678 print_shadow (struct spwd *sp)
 679 {
 680   printf ("%s:%s:",
 681           sp->sp_namp ? sp->sp_namp : "",
 682           sp->sp_pwdp ? sp->sp_pwdp : "");
 683
 684 #define SHADOW_FIELD(n) \
 685   if (sp->n == -1)                                                            \
 686     putchar_unlocked (':');                                                   \
 687   else                                                                        \
 688     printf ("%ld:", sp->n)
 689
 690   SHADOW_FIELD (sp_lstchg);
 691   SHADOW_FIELD (sp_min);
 692   SHADOW_FIELD (sp_max);
 693   SHADOW_FIELD (sp_warn);
 694   SHADOW_FIELD (sp_inact);
 695   SHADOW_FIELD (sp_expire);
 696   if (sp->sp_flag == ~0ul)
 697     putchar_unlocked ('\n');
 698   else
 699     printf ("%lu\n", sp->sp_flag);
 700 }
 701
 702 static int
 703 shadow_keys (int number, char *key[])
 704 {
 705   int result = 0;
 706   int i;
 707
 708   if (number == 0)
 709     {
 710       struct spwd *sp;
 711
 712       setspent ();
 713       while ((sp = getspent ()) != NULL)
 714         print_shadow (sp);
 715       endpwent ();
 716       return result;
 717     }
 718
 719   for (i = 0; i < number; ++i)
 720     {
 721       struct spwd *sp;
 722
 723       sp = getspnam (key[i]);
 724
 725       if (sp == NULL)
 726         result = 2;
 727       else
 728         print_shadow (sp);
 729     }
 730
 731   return result;
 732 }
 733
 734 struct
 735   {
 736     const char *name;
 737     int (*func) (int number, char *key[]);
 738   } databases[] =
 739   {
 740 #define D(name) { #name, name ## _keys },
 741 D(ahosts)
 742 D(ahostsv4)
 743 D(ahostsv6)
 744 D(aliases)
 745 D(ethers)
 746 D(group)
 747 D(hosts)
 748 D(netgroup)
 749 D(networks)
 750 D(passwd)
 751 D(protocols)
 752 D(rpc)
 753 D(services)
 754 D(shadow)
 755 #undef D
 756     { NULL, NULL }
 757   };
 758
 759 /* Handle arguments found by argp. */
 760 static error_t
 761 parse_option (int key, char *arg, struct argp_state *state)
 762 {
 763   char *endp;
 764   switch (key)
 765     {
 766     case 's':
 767       endp = strchr (arg, ':');
 768       if (endp == NULL)
 769         /* No specific database, change them all.  */
 770         for (int i = 0; databases[i].name != NULL; ++i)
 771           __nss_configure_lookup (databases[i].name, arg);
 772       else
 773         {
 774           int i;
 775           for (i = 0; databases[i].name != NULL; ++i)
 776             if (strncmp (databases[i].name, arg, endp - arg) == 0)
 777               {
 778                 __nss_configure_lookup (databases[i].name, endp + 1);
 779                 break;
 780               }
 781           if (databases[i].name == NULL)
 782             error (EXIT_FAILURE, 0, gettext ("Unknown database name"));
 783         }
 784       break;
 785
 786     default:
 787       return ARGP_ERR_UNKNOWN;
 788     }
 789
 790   return 0;
 791 }
 792
 793
 794 static char *
 795 more_help (int key, const char *text, void *input)
 796 {
 797   switch (key)
 798     {
 799       size_t len;
 800       char *doc;
 801       FILE *fp;
 802
 803     case ARGP_KEY_HELP_EXTRA:
 804       /* We print some extra information.  */
 805       fp = open_memstream (&doc, &len);
 806       if (fp != NULL)
 807         {
 808           fputs_unlocked (_("Supported databases:\n"), fp);
 809
 810           for (int i = 0, col = 0; databases[i].name != NULL; ++i)
 811             {
 812               len = strlen (databases[i].name);
 813               if (i != 0)
 814                 {
 815                   if (col + len > 72)
 816                     {
 817                       col = 0;
 818                       fputc_unlocked ('\n', fp);
 819                     }
 820                   else
 821                     fputc_unlocked (' ', fp);
 822                 }
 823
 824               fputs_unlocked (databases[i].name, fp);
 825               col += len + 1;
 826             }
 827
 828           if (fclose (fp) == 0)
 829             return doc;
 830         }
 831       break;
 832
 833     default:
 834       break;
 835     }
 836   return (char *) text;
 837 }
 838
 839
 840 /* the main function */
 841 int
 842 main (int argc, char *argv[])
 843 {
 844   /* Debugging support.  */
 845   mtrace ();
 846
 847   /* Set locale via LC_ALL.  */
 848   setlocale (LC_ALL, "");
 849   /* Set the text message domain.  */
 850   textdomain (PACKAGE);
 851
 852   /* Parse and process arguments.  */
 853   int remaining;
 854   argp_parse (&argp, argc, argv, 0, &remaining, NULL);
 855
 856   if ((argc - remaining) < 1)
 857     {
 858       error (0, 0, gettext ("wrong number of arguments"));
 859       argp_help (&argp, stdout, ARGP_HELP_SEE, program_invocation_short_name);
 860       return 1;
 861     }
 862
 863   for (int i = 0; databases[i].name; ++i)
 864     if (argv[remaining][0] == databases[i].name[0]
 865         && !strcmp (argv[remaining], databases[i].name))
 866       return databases[i].func (argc - remaining - 1, &argv[remaining + 1]);
 867
 868   fprintf (stderr, _("Unknown database: %s\n"), argv[remaining]);
 869   argp_help (&argp, stdout, ARGP_HELP_SEE, program_invocation_short_name);
 870   return 1;
 871 }