1 /* Copyright (c) 1998-2011, 2012 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', "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 (GNU %s) %s\n", PACKAGE, 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)
189 printf ("%s:%s:%lu:", grp->gr_name ? grp->gr_name : "",
190 grp->gr_passwd ? grp->gr_passwd : "",
191 (unsigned long int) grp->gr_gid);
193 while (grp->gr_mem[i] != NULL)
195 fputs_unlocked (grp->gr_mem[i], stdout);
197 if (grp->gr_mem[i] != NULL)
198 putchar_unlocked (',');
200 putchar_unlocked ('\n');
204 group_keys (int number, char *key[])
213 while ((grp = getgrent ()) != NULL)
219 for (i = 0; i < number; ++i)
223 gid_t arg_gid = strtoul(key[i], &ep, 10);
225 if (errno != EINVAL && *key[i] != '\0' && *ep == '\0')
226 /* Valid numeric gid. */
227 grp = getgrgid (arg_gid);
229 grp = getgrnam (key[i]);
240 /* This is for gshadow */
242 print_gshadow (struct sgrp *sg)
247 sg->sg_namp ? sg->sg_namp : "",
248 sg->sg_passwd ? sg->sg_passwd : "");
250 while (sg->sg_adm[i] != NULL)
252 fputs_unlocked (sg->sg_adm[i], stdout);
254 if (sg->sg_adm[i] != NULL)
255 putchar_unlocked (',');
258 putchar_unlocked (':');
261 while (sg->sg_mem[i] != NULL)
263 fputs_unlocked (sg->sg_mem[i], stdout);
265 if (sg->sg_mem[i] != NULL)
266 putchar_unlocked (',');
269 putchar_unlocked ('\n');
273 gshadow_keys (int number, char *key[])
283 while ((sg = getsgent ()) != NULL)
289 for (i = 0; i < number; ++i)
293 sg = getsgnam (key[i]);
304 /* This is for hosts */
306 print_hosts (struct hostent *host)
310 for (cnt = 0; host->h_addr_list[cnt] != NULL; ++cnt)
312 char buf[INET6_ADDRSTRLEN];
313 const char *ip = inet_ntop (host->h_addrtype, host->h_addr_list[cnt],
316 printf ("%-15s %s", ip, host->h_name);
319 for (i = 0; host->h_aliases[i] != NULL; ++i)
321 putchar_unlocked (' ');
322 fputs_unlocked (host->h_aliases[i], stdout);
324 putchar_unlocked ('\n');
329 hosts_keys (int number, char *key[])
333 struct hostent *host;
338 while ((host = gethostent ()) != NULL)
344 for (i = 0; i < number; ++i)
346 struct hostent *host = NULL;
347 char addr[IN6ADDRSZ];
349 if (inet_pton (AF_INET6, key[i], &addr) > 0)
350 host = gethostbyaddr (addr, IN6ADDRSZ, AF_INET6);
351 else if (inet_pton (AF_INET, key[i], &addr) > 0)
352 host = gethostbyaddr (addr, INADDRSZ, AF_INET);
353 else if ((host = gethostbyname2 (key[i], AF_INET6)) == NULL)
354 host = gethostbyname2 (key[i], AF_INET);
365 /* This is for hosts, but using getaddrinfo */
367 ahosts_keys_int (int af, int xflags, int number, char *key[])
371 struct hostent *host;
376 while ((host = gethostent ()) != NULL)
382 struct addrinfo hint;
383 memset (&hint, '\0', sizeof (hint));
384 hint.ai_flags = (AI_V4MAPPED | AI_ADDRCONFIG | AI_CANONNAME
385 | idn_flags | xflags);
388 for (i = 0; i < number; ++i)
390 struct addrinfo *res;
392 if (getaddrinfo (key[i], NULL, &hint, &res) != 0)
396 struct addrinfo *runp = res;
402 if (runp->ai_socktype == SOCK_STREAM)
404 else if (runp->ai_socktype == SOCK_DGRAM)
406 else if (runp->ai_socktype == SOCK_RAW)
408 #ifdef SOCK_SEQPACKET
409 else if (runp->ai_socktype == SOCK_SEQPACKET)
410 sockstr = "SEQPACKET";
413 else if (runp->ai_socktype == SOCK_RDM)
417 else if (runp->ai_socktype == SOCK_DCCP)
421 else if (runp->ai_socktype == SOCK_PACKET)
426 snprintf (sockbuf, sizeof (sockbuf), "%d",
431 char buf[INET6_ADDRSTRLEN];
432 printf ("%-15s %-6s %s\n",
433 inet_ntop (runp->ai_family,
434 runp->ai_family == AF_INET
435 ? (void *) &((struct sockaddr_in *) runp->ai_addr)->sin_addr
436 : (void *) &((struct sockaddr_in6 *) runp->ai_addr)->sin6_addr,
439 runp->ai_canonname ?: "");
441 runp = runp->ai_next;
452 ahosts_keys (int number, char *key[])
454 return ahosts_keys_int (AF_UNSPEC, 0, number, key);
458 ahostsv4_keys (int number, char *key[])
460 return ahosts_keys_int (AF_INET, 0, number, key);
464 ahostsv6_keys (int number, char *key[])
466 return ahosts_keys_int (AF_INET6, AI_V4MAPPED, number, key);
469 /* This is for netgroup */
471 netgroup_keys (int number, char *key[])
477 fprintf (stderr, _("Enumeration not supported on %s\n"), "netgroup");
483 char *host = strcmp (key[1], "*") == 0 ? NULL : key[1];
484 char *user = strcmp (key[2], "*") == 0 ? NULL : key[2];
485 char *domain = strcmp (key[3], "*") == 0 ? NULL : key[3];
487 printf ("%-21s (%s,%s,%s) = %d\n",
488 key[0], host ?: "", user ?: "", domain ?: "",
489 innetgr (key[0], host, user, domain));
491 else if (number == 1)
493 if (!setnetgrent (key[0]))
499 printf ("%-21s", key[0]);
501 while (getnetgrent (p, p + 1, p + 2))
502 printf (" (%s,%s,%s)", p[0] ?: " ", p[1] ?: "", p[2] ?: "");
503 putchar_unlocked ('\n');
512 /* This is for initgroups */
514 initgroups_keys (int number, char *key[])
517 size_t grpslen = ngrps * sizeof (gid_t);
518 gid_t *grps = alloca (grpslen);
522 fprintf (stderr, _("Enumeration not supported on %s\n"), "initgroups");
526 for (int i = 0; i < number; ++i)
530 while ((n = getgrouplist (key[i], -1, grps, &no)) == -1
533 grps = extend_alloca (grps, grpslen, no * sizeof (gid_t));
540 printf ("%-21s", key[i]);
541 for (int j = 0; j < n; ++j)
543 printf (" %ld", (long int) grps[j]);
544 putchar_unlocked ('\n');
550 /* This is for networks */
552 print_networks (struct netent *net)
556 ip.s_addr = htonl (net->n_net);
558 printf ("%-21s %s", net->n_name, inet_ntoa (ip));
561 while (net->n_aliases[i] != NULL)
563 putchar_unlocked (' ');
564 fputs_unlocked (net->n_aliases[i], stdout);
567 putchar_unlocked ('\n');
571 networks_keys (int number, char *key[])
580 while ((net = getnetent ()) != NULL)
581 print_networks (net);
586 for (i = 0; i < number; ++i)
588 if (isdigit (key[i][0]))
589 net = getnetbyaddr (ntohl (inet_addr (key[i])), AF_UNSPEC);
591 net = getnetbyname (key[i]);
596 print_networks (net);
602 /* Now is all for passwd */
604 print_passwd (struct passwd *pwd)
606 printf ("%s:%s:%lu:%lu:%s:%s:%s\n",
607 pwd->pw_name ? pwd->pw_name : "",
608 pwd->pw_passwd ? pwd->pw_passwd : "",
609 (unsigned long int) pwd->pw_uid,
610 (unsigned long int) pwd->pw_gid,
611 pwd->pw_gecos ? pwd->pw_gecos : "",
612 pwd->pw_dir ? pwd->pw_dir : "",
613 pwd->pw_shell ? pwd->pw_shell : "");
617 passwd_keys (int number, char *key[])
626 while ((pwd = getpwent ()) != NULL)
632 for (i = 0; i < number; ++i)
636 uid_t arg_uid = strtoul(key[i], &ep, 10);
638 if (errno != EINVAL && *key[i] != '\0' && *ep == '\0')
639 /* Valid numeric uid. */
640 pwd = getpwuid (arg_uid);
642 pwd = getpwnam (key[i]);
653 /* This is for protocols */
655 print_protocols (struct protoent *proto)
659 printf ("%-21s %d", proto->p_name, proto->p_proto);
662 while (proto->p_aliases[i] != NULL)
664 putchar_unlocked (' ');
665 fputs_unlocked (proto->p_aliases[i], stdout);
668 putchar_unlocked ('\n');
672 protocols_keys (int number, char *key[])
676 struct protoent *proto;
681 while ((proto = getprotoent ()) != NULL)
682 print_protocols (proto);
687 for (i = 0; i < number; ++i)
689 if (isdigit (key[i][0]))
690 proto = getprotobynumber (atol (key[i]));
692 proto = getprotobyname (key[i]);
697 print_protocols (proto);
703 /* Now is all for rpc */
705 print_rpc (struct rpcent *rpc)
709 printf ("%-15s %d%s",
710 rpc->r_name, rpc->r_number, rpc->r_aliases[0] ? " " : "");
712 for (i = 0; rpc->r_aliases[i]; ++i)
713 printf (" %s", rpc->r_aliases[i]);
714 putchar_unlocked ('\n');
718 rpc_keys (int number, char *key[])
727 while ((rpc = getrpcent ()) != NULL)
733 for (i = 0; i < number; ++i)
735 if (isdigit (key[i][0]))
736 rpc = getrpcbynumber (atol (key[i]));
738 rpc = getrpcbyname (key[i]);
751 print_services (struct servent *serv)
755 printf ("%-21s %d/%s", serv->s_name, ntohs (serv->s_port), serv->s_proto);
758 while (serv->s_aliases[i] != NULL)
760 putchar_unlocked (' ');
761 fputs_unlocked (serv->s_aliases[i], stdout);
764 putchar_unlocked ('\n');
768 services_keys (int number, char *key[])
772 struct servent *serv;
777 while ((serv = getservent ()) != NULL)
778 print_services (serv);
783 for (i = 0; i < number; ++i)
785 struct servent *serv;
786 char *proto = strchr (key[i], '/');
791 if (isdigit (key[i][0]))
792 serv = getservbyport (htons (atol (key[i])), proto);
794 serv = getservbyname (key[i], proto);
799 print_services (serv);
805 /* This is for shadow */
807 print_shadow (struct spwd *sp)
810 sp->sp_namp ? sp->sp_namp : "",
811 sp->sp_pwdp ? sp->sp_pwdp : "");
813 #define SHADOW_FIELD(n) \
815 putchar_unlocked (':'); \
817 printf ("%ld:", sp->n)
819 SHADOW_FIELD (sp_lstchg);
820 SHADOW_FIELD (sp_min);
821 SHADOW_FIELD (sp_max);
822 SHADOW_FIELD (sp_warn);
823 SHADOW_FIELD (sp_inact);
824 SHADOW_FIELD (sp_expire);
825 if (sp->sp_flag == ~0ul)
826 putchar_unlocked ('\n');
828 printf ("%lu\n", sp->sp_flag);
832 shadow_keys (int number, char *key[])
842 while ((sp = getspent ()) != NULL)
848 for (i = 0; i < number; ++i)
852 sp = getspnam (key[i]);
866 int (*func) (int number, char *key[]);
869 #define D(name) { #name, name ## _keys },
890 /* Handle arguments found by argp. */
892 parse_option (int key, char *arg, struct argp_state *state)
898 endp = strchr (arg, ':');
900 /* No specific database, change them all. */
901 for (int i = 0; databases[i].name != NULL; ++i)
902 __nss_configure_lookup (databases[i].name, arg);
906 for (i = 0; databases[i].name != NULL; ++i)
907 if (strncmp (databases[i].name, arg, endp - arg) == 0)
909 __nss_configure_lookup (databases[i].name, endp + 1);
912 if (databases[i].name == NULL)
913 error (EXIT_FAILURE, 0, gettext ("Unknown database name"));
922 return ARGP_ERR_UNKNOWN;
930 more_help (int key, const char *text, void *input)
938 case ARGP_KEY_HELP_EXTRA:
939 /* We print some extra information. */
940 fp = open_memstream (&doc, &len);
943 fputs_unlocked (_("Supported databases:\n"), fp);
945 for (int i = 0, col = 0; databases[i].name != NULL; ++i)
947 len = strlen (databases[i].name);
953 fputc_unlocked ('\n', fp);
956 fputc_unlocked (' ', fp);
959 fputs_unlocked (databases[i].name, fp);
966 For bug reporting instructions, please see:\n\
967 <http://www.gnu.org/software/libc/bugs.html>.\n"), fp);
969 if (fclose (fp) == 0)
977 return (char *) text;
981 /* the main function */
983 main (int argc, char *argv[])
985 /* Debugging support. */
988 /* Set locale via LC_ALL. */
989 setlocale (LC_ALL, "");
990 /* Set the text message domain. */
991 textdomain (PACKAGE);
993 /* Parse and process arguments. */
995 argp_parse (&argp, argc, argv, 0, &remaining, NULL);
997 if ((argc - remaining) < 1)
999 error (0, 0, gettext ("wrong number of arguments"));
1000 argp_help (&argp, stdout, ARGP_HELP_SEE, program_invocation_short_name);
1004 for (int i = 0; databases[i].name; ++i)
1005 if (argv[remaining][0] == databases[i].name[0]
1006 && !strcmp (argv[remaining], databases[i].name))
1007 return databases[i].func (argc - remaining - 1, &argv[remaining + 1]);
1009 fprintf (stderr, _("Unknown database: %s\n"), argv[remaining]);
1010 argp_help (&argp, stdout, ARGP_HELP_SEE, program_invocation_short_name);