1 /* Copyright (c) 1998-2017 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Thorsten Kukuk <kukuk@suse.de>, 1998.
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.
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.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
19 /* getent: get entries from administrative database. */
37 #include <arpa/inet.h>
38 #include <arpa/nameser.h>
39 #include <netinet/ether.h>
40 #include <netinet/in.h>
41 #include <sys/socket.h>
43 /* Get libc version number. */
46 #define PACKAGE _libc_intl_domainname
48 /* Name and version of program. */
49 static void print_version (FILE *stream, struct argp_state *state);
50 void (*argp_program_version_hook) (FILE *, struct argp_state *) = print_version;
52 /* Short description of parameters. */
53 static const char args_doc[] = N_("database [key ...]");
55 /* Supported options. */
56 static const struct argp_option args_options[] =
58 { "service", 's', N_("CONFIG"), 0, N_("Service configuration to be used") },
59 { "no-idn", 'i', NULL, 0, N_("disable IDN encoding") },
60 { NULL, 0, NULL, 0, NULL },
63 /* Short description of program. */
64 static const char doc[] = N_("Get entries from administrative database.");
66 /* Prototype for option handler. */
67 static error_t parse_option (int key, char *arg, struct argp_state *state);
69 /* Function to print some extra text in the help message. */
70 static char *more_help (int key, const char *text, void *input);
72 /* Data structure to communicate with argp functions. */
73 static struct argp argp =
75 args_options, parse_option, args_doc, doc, NULL, more_help
78 /* Additional getaddrinfo flags for IDN encoding. */
79 static int idn_flags = AI_IDN | AI_CANONIDN;
81 /* Print the version information. */
83 print_version (FILE *stream, struct argp_state *state)
85 fprintf (stream, "getent %s%s\n", PKGVERSION, VERSION);
86 fprintf (stream, gettext ("\
87 Copyright (C) %s Free Software Foundation, Inc.\n\
88 This is free software; see the source for copying conditions. There is NO\n\
89 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\
91 fprintf (stream, gettext ("Written by %s.\n"), "Thorsten Kukuk");
94 /* This is for aliases */
96 print_aliases (struct aliasent *alias)
100 printf ("%s: ", alias->alias_name);
101 for (i = strlen (alias->alias_name); i < 14; ++i)
102 fputs_unlocked (" ", stdout);
104 for (i = 0; i < alias->alias_members_len; ++i)
106 alias->alias_members [i],
107 i + 1 == alias->alias_members_len ? "\n" : ", ");
111 aliases_keys (int number, char *key[])
115 struct aliasent *alias;
120 while ((alias = getaliasent ()) != NULL)
121 print_aliases (alias);
126 for (i = 0; i < number; ++i)
128 alias = getaliasbyname (key[i]);
133 print_aliases (alias);
139 /* This is for ethers */
141 ethers_keys (int number, char *key[])
148 fprintf (stderr, _("Enumeration not supported on %s\n"), "ethers");
152 for (i = 0; i < number; ++i)
154 struct ether_addr *ethp, eth;
155 char buffer [1024], *p;
157 ethp = ether_aton (key[i]);
160 if (ether_ntohost (buffer, ethp))
169 if (ether_hostton (key[i], ð))
177 printf ("%s %s\n", ether_ntoa (ethp), p);
183 /* This is for group */
185 print_group (struct group *grp)
187 if (putgrent (grp, stdout) != 0)
188 fprintf (stderr, "error writing group entry: %m\n");
192 group_keys (int number, char *key[])
201 while ((grp = getgrent ()) != NULL)
207 for (i = 0; i < number; ++i)
211 gid_t arg_gid = strtoul(key[i], &ep, 10);
213 if (errno != EINVAL && *key[i] != '\0' && *ep == '\0')
214 /* Valid numeric gid. */
215 grp = getgrgid (arg_gid);
217 grp = getgrnam (key[i]);
228 /* This is for gshadow */
230 print_gshadow (struct sgrp *sg)
232 if (putsgent (sg, stdout) != 0)
233 fprintf (stderr, "error writing gshadow entry: %m\n");
237 gshadow_keys (int number, char *key[])
247 while ((sg = getsgent ()) != NULL)
253 for (i = 0; i < number; ++i)
257 sg = getsgnam (key[i]);
268 /* This is for hosts */
270 print_hosts (struct hostent *host)
274 for (cnt = 0; host->h_addr_list[cnt] != NULL; ++cnt)
276 char buf[INET6_ADDRSTRLEN];
277 const char *ip = inet_ntop (host->h_addrtype, host->h_addr_list[cnt],
280 printf ("%-15s %s", ip, host->h_name);
283 for (i = 0; host->h_aliases[i] != NULL; ++i)
285 putchar_unlocked (' ');
286 fputs_unlocked (host->h_aliases[i], stdout);
288 putchar_unlocked ('\n');
293 hosts_keys (int number, char *key[])
297 struct hostent *host;
302 while ((host = gethostent ()) != NULL)
308 for (i = 0; i < number; ++i)
310 struct hostent *host = NULL;
311 char addr[IN6ADDRSZ];
313 if (inet_pton (AF_INET6, key[i], &addr) > 0)
314 host = gethostbyaddr (addr, IN6ADDRSZ, AF_INET6);
315 else if (inet_pton (AF_INET, key[i], &addr) > 0)
316 host = gethostbyaddr (addr, INADDRSZ, AF_INET);
317 else if ((host = gethostbyname2 (key[i], AF_INET6)) == NULL)
318 host = gethostbyname2 (key[i], AF_INET);
329 /* This is for hosts, but using getaddrinfo */
331 ahosts_keys_int (int af, int xflags, int number, char *key[])
335 struct hostent *host;
340 while ((host = gethostent ()) != NULL)
346 struct addrinfo hint;
347 memset (&hint, '\0', sizeof (hint));
348 hint.ai_flags = (AI_V4MAPPED | AI_ADDRCONFIG | AI_CANONNAME
349 | idn_flags | xflags);
352 for (i = 0; i < number; ++i)
354 struct addrinfo *res;
356 if (getaddrinfo (key[i], NULL, &hint, &res) != 0)
360 struct addrinfo *runp = res;
366 if (runp->ai_socktype == SOCK_STREAM)
368 else if (runp->ai_socktype == SOCK_DGRAM)
370 else if (runp->ai_socktype == SOCK_RAW)
372 #ifdef SOCK_SEQPACKET
373 else if (runp->ai_socktype == SOCK_SEQPACKET)
374 sockstr = "SEQPACKET";
377 else if (runp->ai_socktype == SOCK_RDM)
381 else if (runp->ai_socktype == SOCK_DCCP)
385 else if (runp->ai_socktype == SOCK_PACKET)
390 snprintf (sockbuf, sizeof (sockbuf), "%d",
395 char buf[INET6_ADDRSTRLEN];
396 printf ("%-15s %-6s %s\n",
397 inet_ntop (runp->ai_family,
398 runp->ai_family == AF_INET
399 ? (void *) &((struct sockaddr_in *) runp->ai_addr)->sin_addr
400 : (void *) &((struct sockaddr_in6 *) runp->ai_addr)->sin6_addr,
403 runp->ai_canonname ?: "");
405 runp = runp->ai_next;
416 ahosts_keys (int number, char *key[])
418 return ahosts_keys_int (AF_UNSPEC, 0, number, key);
422 ahostsv4_keys (int number, char *key[])
424 return ahosts_keys_int (AF_INET, 0, number, key);
428 ahostsv6_keys (int number, char *key[])
430 return ahosts_keys_int (AF_INET6, AI_V4MAPPED, number, key);
433 /* This is for netgroup */
435 netgroup_keys (int number, char *key[])
441 fprintf (stderr, _("Enumeration not supported on %s\n"), "netgroup");
447 char *host = strcmp (key[1], "*") == 0 ? NULL : key[1];
448 char *user = strcmp (key[2], "*") == 0 ? NULL : key[2];
449 char *domain = strcmp (key[3], "*") == 0 ? NULL : key[3];
451 printf ("%-21s (%s,%s,%s) = %d\n",
452 key[0], host ?: "", user ?: "", domain ?: "",
453 innetgr (key[0], host, user, domain));
455 else if (number == 1)
457 if (!setnetgrent (key[0]))
463 printf ("%-21s", key[0]);
465 while (getnetgrent (p, p + 1, p + 2))
466 printf (" (%s,%s,%s)", p[0] ?: " ", p[1] ?: "", p[2] ?: "");
467 putchar_unlocked ('\n');
476 /* This is for initgroups */
478 initgroups_keys (int number, char *key[])
481 size_t grpslen = ngrps * sizeof (gid_t);
482 gid_t *grps = alloca (grpslen);
486 fprintf (stderr, _("Enumeration not supported on %s\n"), "initgroups");
490 for (int i = 0; i < number; ++i)
494 while ((n = getgrouplist (key[i], -1, grps, &no)) == -1
497 grps = extend_alloca (grps, grpslen, no * sizeof (gid_t));
504 printf ("%-21s", key[i]);
505 for (int j = 0; j < n; ++j)
507 printf (" %ld", (long int) grps[j]);
508 putchar_unlocked ('\n');
514 /* This is for networks */
516 print_networks (struct netent *net)
520 ip.s_addr = htonl (net->n_net);
522 printf ("%-21s %s", net->n_name, inet_ntoa (ip));
525 while (net->n_aliases[i] != NULL)
527 putchar_unlocked (' ');
528 fputs_unlocked (net->n_aliases[i], stdout);
531 putchar_unlocked ('\n');
535 networks_keys (int number, char *key[])
544 while ((net = getnetent ()) != NULL)
545 print_networks (net);
550 for (i = 0; i < number; ++i)
552 if (isdigit (key[i][0]))
553 net = getnetbyaddr (ntohl (inet_addr (key[i])), AF_UNSPEC);
555 net = getnetbyname (key[i]);
560 print_networks (net);
566 /* Now is all for passwd */
568 print_passwd (struct passwd *pwd)
570 if (putpwent (pwd, stdout) != 0)
571 fprintf (stderr, "error writing passwd entry: %m\n");
575 passwd_keys (int number, char *key[])
584 while ((pwd = getpwent ()) != NULL)
590 for (i = 0; i < number; ++i)
594 uid_t arg_uid = strtoul(key[i], &ep, 10);
596 if (errno != EINVAL && *key[i] != '\0' && *ep == '\0')
597 /* Valid numeric uid. */
598 pwd = getpwuid (arg_uid);
600 pwd = getpwnam (key[i]);
611 /* This is for protocols */
613 print_protocols (struct protoent *proto)
617 printf ("%-21s %d", proto->p_name, proto->p_proto);
620 while (proto->p_aliases[i] != NULL)
622 putchar_unlocked (' ');
623 fputs_unlocked (proto->p_aliases[i], stdout);
626 putchar_unlocked ('\n');
630 protocols_keys (int number, char *key[])
634 struct protoent *proto;
639 while ((proto = getprotoent ()) != NULL)
640 print_protocols (proto);
645 for (i = 0; i < number; ++i)
647 if (isdigit (key[i][0]))
648 proto = getprotobynumber (atol (key[i]));
650 proto = getprotobyname (key[i]);
655 print_protocols (proto);
662 /* Now is all for rpc */
664 print_rpc (struct rpcent *rpc)
668 printf ("%-15s %d%s",
669 rpc->r_name, rpc->r_number, rpc->r_aliases[0] ? " " : "");
671 for (i = 0; rpc->r_aliases[i]; ++i)
672 printf (" %s", rpc->r_aliases[i]);
673 putchar_unlocked ('\n');
677 rpc_keys (int number, char *key[])
686 while ((rpc = getrpcent ()) != NULL)
692 for (i = 0; i < number; ++i)
694 if (isdigit (key[i][0]))
695 rpc = getrpcbynumber (atol (key[i]));
697 rpc = getrpcbyname (key[i]);
711 print_services (struct servent *serv)
715 printf ("%-21s %d/%s", serv->s_name, ntohs (serv->s_port), serv->s_proto);
718 while (serv->s_aliases[i] != NULL)
720 putchar_unlocked (' ');
721 fputs_unlocked (serv->s_aliases[i], stdout);
724 putchar_unlocked ('\n');
728 services_keys (int number, char *key[])
732 struct servent *serv;
737 while ((serv = getservent ()) != NULL)
738 print_services (serv);
743 for (i = 0; i < number; ++i)
745 struct servent *serv;
746 char *proto = strchr (key[i], '/');
752 long port = strtol (key[i], &endptr, 10);
754 if (isdigit (key[i][0]) && *endptr == '\0'
755 && 0 <= port && port <= 65535)
756 serv = getservbyport (htons (port), proto);
758 serv = getservbyname (key[i], proto);
763 print_services (serv);
769 /* This is for shadow */
771 print_shadow (struct spwd *sp)
773 if (putspent (sp, stdout) != 0)
774 fprintf (stderr, "error writing shadow entry: %m\n");
778 shadow_keys (int number, char *key[])
788 while ((sp = getspent ()) != NULL)
794 for (i = 0; i < number; ++i)
798 sp = getspnam (key[i]);
812 int (*func) (int number, char *key[]);
815 #define D(name) { #name, name ## _keys },
838 /* Handle arguments found by argp. */
840 parse_option (int key, char *arg, struct argp_state *state)
846 endp = strchr (arg, ':');
848 /* No specific database, change them all. */
849 for (int i = 0; databases[i].name != NULL; ++i)
850 __nss_configure_lookup (databases[i].name, arg);
854 for (i = 0; databases[i].name != NULL; ++i)
855 if (strncmp (databases[i].name, arg, endp - arg) == 0)
857 __nss_configure_lookup (databases[i].name, endp + 1);
860 if (databases[i].name == NULL)
861 error (EXIT_FAILURE, 0, gettext ("Unknown database name"));
870 return ARGP_ERR_UNKNOWN;
878 more_help (int key, const char *text, void *input)
886 case ARGP_KEY_HELP_EXTRA:
887 /* We print some extra information. */
888 fp = open_memstream (&doc, &len);
891 fputs_unlocked (_("Supported databases:\n"), fp);
893 for (int i = 0, col = 0; databases[i].name != NULL; ++i)
895 len = strlen (databases[i].name);
901 fputc_unlocked ('\n', fp);
904 fputc_unlocked (' ', fp);
907 fputs_unlocked (databases[i].name, fp);
913 fprintf (fp, gettext ("\
914 For bug reporting instructions, please see:\n\
915 %s.\n"), REPORT_BUGS_TO);
917 if (fclose (fp) == 0)
925 return (char *) text;
929 /* the main function */
931 main (int argc, char *argv[])
933 /* Debugging support. */
936 /* Set locale via LC_ALL. */
937 setlocale (LC_ALL, "");
938 /* Set the text message domain. */
939 textdomain (PACKAGE);
941 /* Parse and process arguments. */
943 argp_parse (&argp, argc, argv, 0, &remaining, NULL);
945 if ((argc - remaining) < 1)
947 error (0, 0, gettext ("wrong number of arguments"));
948 argp_help (&argp, stdout, ARGP_HELP_SEE, program_invocation_short_name);
952 for (int i = 0; databases[i].name; ++i)
953 if (argv[remaining][0] == databases[i].name[0]
954 && !strcmp (argv[remaining], databases[i].name))
955 return databases[i].func (argc - remaining - 1, &argv[remaining + 1]);
957 fprintf (stderr, _("Unknown database: %s\n"), argv[remaining]);
958 argp_help (&argp, stdout, ARGP_HELP_SEE, program_invocation_short_name);