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glibc/nss/getent.c

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/* Copyright (c) 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Thorsten Kukuk <kukuk@suse.de>, 1998.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
/* getent: get entries from administrative database. */
#include <aliases.h>
#include <argp.h>
#include <grp.h>
#include <pwd.h>
#include <shadow.h>
#include <ctype.h>
#include <error.h>
#include <libintl.h>
#include <locale.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/ether.h>
#include <arpa/inet.h>
#include <arpa/nameser.h>
/* Get libc version number. */
#include <version.h>
#define PACKAGE _libc_intl_domainname
/* Name and version of program. */
static void print_version (FILE *stream, struct argp_state *state);
void (*argp_program_version_hook) (FILE *, struct argp_state *) = print_version;
/* Short description of parameters. */
static const char args_doc[] = N_("database [key ...]");
/* Data structure to communicate with argp functions. */
static struct argp argp = {
NULL, NULL, args_doc, NULL,
};
/* Print the version information. */
static void
print_version (FILE *stream, struct argp_state *state)
{
fprintf (stream, "getent (GNU %s) %s\n", PACKAGE, VERSION);
fprintf (stream, gettext ("\
Copyright (C) %s Free Software Foundation, Inc.\n\
This is free software; see the source for copying conditions. There is NO\n\
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\
"), "2001");
fprintf (stream, gettext ("Written by %s.\n"), "Thorsten Kukuk");
}
/* This is for aliases */
static inline void
print_aliases (struct aliasent *alias)
{
unsigned int i = 0;
printf ("%s: ", alias->alias_name);
for (i = strlen (alias->alias_name); i < 14; ++i)
fputs (" ", stdout);
for (i = 0;
i < alias->alias_members_len;
++i)
printf ("%s%s",
alias->alias_members [i],
i + 1 == alias->alias_members_len ? "\n" : ", ");
}
static int
aliases_keys (int number, char *key[])
{
int result = 0;
int i;
struct aliasent *alias;
if (!number)
{
setaliasent ();
while ((alias = getaliasent()) != NULL)
print_aliases (alias);
endaliasent ();
return result;
}
for (i = 0; i < number; ++i)
{
alias = getaliasbyname (key[i]);
if (alias == NULL)
result = 2;
else
print_aliases (alias);
}
return result;
}
/* This is for ethers */
static int
ethers_keys (int number, char *key[])
{
int result = 0;
int i;
if (!number)
{
fprintf (stderr, _("Enumeration not supported on %s\n"), "ethers");
return 3;
}
for (i = 0; i < number; ++i)
{
struct ether_addr *ethp, eth;
char buffer [1024], *p;
ethp = ether_aton (key[i]);
if (ethp)
{
if (ether_ntohost (buffer, ethp))
{
result = 2;
continue;
}
p = buffer;
}
else
{
if (ether_hostton (key[i], &eth))
{
result = 2;
continue;
}
p = key[i];
ethp = &eth;
}
printf ("%s %s\n", ether_ntoa (ethp), p);
}
return result;
}
/* This is for group */
static inline void
print_group (struct group *grp)
{
unsigned int i = 0;
printf ("%s:%s:%ld:", grp->gr_name ? grp->gr_name : "",
grp->gr_passwd ? grp->gr_passwd : "",
(unsigned long)grp->gr_gid);
while (grp->gr_mem[i] != NULL)
{
fputs (grp->gr_mem[i], stdout);
++i;
if (grp->gr_mem[i] != NULL)
fputs (",", stdout);
}
fputs ("\n", stdout);
}
static int
group_keys (int number, char *key[])
{
int result = 0;
int i;
struct group *grp;
if (!number)
{
setgrent ();
while ((grp = getgrent()) != NULL)
print_group (grp);
endgrent ();
return result;
}
for (i = 0; i < number; ++i)
{
if (isdigit (key[i][0]))
grp = getgrgid (atol (key[i]));
else
grp = getgrnam (key[i]);
if (grp == NULL)
result = 2;
else
print_group (grp);
}
return result;
}
/* This is for hosts */
static inline void
print_hosts (struct hostent *host)
{
unsigned int i;
char buf[INET6_ADDRSTRLEN];
const char *ip = inet_ntop (host->h_addrtype, host->h_addr_list[0],
buf, sizeof (buf));
fputs (ip, stdout);
for (i = strlen (ip); i < 15; ++i)
fputs (" ", stdout);
fputs (" ", stdout);
fputs (host->h_name, stdout);
i = 0;
while (host->h_aliases[i] != NULL)
{
fputs (" ", stdout);
fputs (host->h_aliases[i], stdout);
++i;
}
fputs ("\n", stdout);
}
static int
hosts_keys (int number, char *key[])
{
int result = 0;
int i;
struct hostent *host;
if (!number)
{
sethostent (0);
while ((host = gethostent()) != NULL)
print_hosts (host);
endhostent ();
return result;
}
for (i = 0; i < number; ++i)
{
struct hostent *host = NULL;
if (strchr (key[i], ':') != NULL)
{
char addr[IN6ADDRSZ];
if (inet_pton (AF_INET6, key[i], &addr))
host = gethostbyaddr (addr, sizeof (addr), AF_INET6);
}
else if (isdigit (key[i][0]))
{
char addr[INADDRSZ];
if (inet_pton (AF_INET, key[i], &addr))
host = gethostbyaddr (addr, sizeof (addr), AF_INET);
}
else if ((host = gethostbyname2 (key[i], AF_INET6)) == NULL)
host = gethostbyname2 (key[i], AF_INET);
if (host == NULL)
result = 2;
else
print_hosts (host);
}
return result;
}
/* This is for netgroup */
static int
netgroup_keys (int number, char *key[])
{
int result = 0;
int i, j;
if (!number)
{
fprintf (stderr, _("Enumeration not supported on %s\n"), "netgroup");
return 3;
}
for (i = 0; i < number; ++i)
{
if (!setnetgrent (key[i]))
result = 2;
else
{
char *p[3];
fputs (key[i], stdout);
for (j = strlen (key[i]); j < 21; ++j)
fputs (" ", stdout);
while (getnetgrent (p, p + 1, p + 2))
printf (" (%s, %s, %s)", p[0] ?: " ", p[1] ?: "", p[2] ?: "");
fputs ("\n", stdout);
}
}
return result;
}
/* This is for networks */
static inline void
print_networks (struct netent *net)
{
unsigned int i;
struct in_addr ip;
ip.s_addr = htonl (net->n_net);
printf ("%s ", net->n_name);
for (i = strlen (net->n_name); i < 21; ++i)
fputs (" ", stdout);
fputs (inet_ntoa (ip), stdout);
i = 0;
while (net->n_aliases[i] != NULL)
{
fputs (" ", stdout);
fputs (net->n_aliases[i], stdout);
++i;
if (net->n_aliases[i] != NULL)
fputs (",", stdout);
}
fputs ("\n", stdout);
}
static int
networks_keys (int number, char *key[])
{
int result = 0;
int i;
struct netent *net;
if (!number)
{
setnetent (0);
while ((net = getnetent()) != NULL)
print_networks (net);
endnetent ();
return result;
}
for (i = 0; i < number; ++i)
{
if (isdigit (key[i][0]))
net = getnetbyaddr (inet_addr (key[i]), AF_UNIX);
else
net = getnetbyname (key[i]);
if (net == NULL)
result = 2;
else
print_networks (net);
}
return result;
}
/* Now is all for passwd */
static inline void
print_passwd (struct passwd *pwd)
{
printf ("%s:%s:%ld:%ld:%s:%s:%s\n",
pwd->pw_name ? pwd->pw_name : "",
pwd->pw_passwd ? pwd->pw_passwd : "",
(unsigned long)pwd->pw_uid,
(unsigned long)pwd->pw_gid,
pwd->pw_gecos ? pwd->pw_gecos : "",
pwd->pw_dir ? pwd->pw_dir : "",
pwd->pw_shell ? pwd->pw_shell : "");
}
static int
passwd_keys (int number, char *key[])
{
int result = 0;
int i;
struct passwd *pwd;
if (!number)
{
setpwent ();
while ((pwd = getpwent()) != NULL)
print_passwd (pwd);
endpwent ();
return result;
}
for (i = 0; i < number; ++i)
{
if (isdigit (key[i][0]))
pwd = getpwuid (atol (key[i]));
else
pwd = getpwnam (key[i]);
if (pwd == NULL)
result = 2;
else
print_passwd (pwd);
}
return result;
}
/* This is for protocols */
static inline void
print_protocols (struct protoent *proto)
{
unsigned int i;
fputs (proto->p_name, stdout);
for (i = strlen (proto->p_name); i < 21; ++i)
fputs (" ", stdout);
printf (" %d", proto->p_proto);
i = 0;
while (proto->p_aliases[i] != NULL)
{
fputs (" ", stdout);
fputs (proto->p_aliases[i], stdout);
++i;
}
fputs ("\n", stdout);
}
static int
protocols_keys (int number, char *key[])
{
int result = 0;
int i;
struct protoent *proto;
if (!number)
{
setprotoent (0);
while ((proto = getprotoent()) != NULL)
print_protocols (proto);
endprotoent ();
return result;
}
for (i = 0; i < number; ++i)
{
if (isdigit (key[i][0]))
proto = getprotobynumber (atol (key[i]));
else
proto = getprotobyname (key[i]);
if (proto == NULL)
result = 2;
else
print_protocols (proto);
}
return result;
}
/* Now is all for rpc */
static inline void
print_rpc (struct rpcent *rpc)
{
int i;
fputs (rpc->r_name, stdout);
for (i = strlen (rpc->r_name); i < 15; ++i)
fputs (" ", stdout);
printf (" %d%s", rpc->r_number, rpc->r_aliases[0] ? " " : "");
for (i = 0; rpc->r_aliases[i]; ++i)
printf (" %s", rpc->r_aliases[i]);
fputs ("\n", stdout);
}
static int
rpc_keys (int number, char *key[])
{
int result = 0;
int i;
struct rpcent *rpc;
if (!number)
{
setrpcent (0);
while ((rpc = getrpcent()) != NULL)
print_rpc (rpc);
endrpcent ();
return result;
}
for (i = 0; i < number; ++i)
{
if (isdigit (key[i][0]))
rpc = getrpcbynumber (atol (key[i]));
else
rpc = getrpcbyname (key[i]);
if (rpc == NULL)
result = 2;
else
print_rpc (rpc);
}
return result;
}
/* for services */
static void
print_services (struct servent *serv)
{
unsigned int i;
fputs (serv->s_name, stdout);
for (i = strlen (serv->s_name); i < 21; ++i)
fputs (" ", stdout);
printf (" %d/%s", ntohs (serv->s_port), serv->s_proto);
i = 0;
while (serv->s_aliases[i] != NULL)
{
fputs (" ", stdout);
fputs (serv->s_aliases[i], stdout);
++i;
}
fputs ("\n", stdout);
}
static int
services_keys (int number, char *key[])
{
int result = 0;
int i;
struct servent *serv;
if (!number)
{
setservent (0);
while ((serv = getservent()) != NULL)
print_services (serv);
endservent ();
return result;
}
for (i = 0; i < number; ++i)
{
struct servent *serv;
char *proto = strchr (key[i], '/');
if (proto == NULL)
{
setservent (0);
if (isdigit (key[i][0]))
{
int port = htons (atol (key[i]));
while ((serv = getservent ()) != NULL)
if (serv->s_port == port)
{
print_services (serv);
break;
}
}
else
{
int j;
while ((serv = getservent ()) != NULL)
if (strcmp (serv->s_name, key[i]) == 0)
{
print_services (serv);
break;
}
else
for (j = 0; serv->s_aliases[j]; ++j)
if (strcmp (serv->s_aliases[j], key[i]) == 0)
{
print_services (serv);
break;
}
}
endservent ();
}
else
{
*proto++ = '\0';
if (isdigit (key[i][0]))
serv = getservbyport (htons (atol (key[i])), proto);
else
serv = getservbyname (key[i], proto);
if (serv == NULL)
result = 2;
else
print_services (serv);
}
}
return result;
}
/* This is for shadow */
static inline void
print_shadow (struct spwd *sp)
{
printf ("%s:%s:",
sp->sp_namp ? sp->sp_namp : "",
sp->sp_pwdp ? sp->sp_pwdp : "");
#define SHADOW_FIELD(n) \
if (sp->n == -1) \
fputs (":", stdout); \
else \
printf ("%ld:", sp->n)
SHADOW_FIELD (sp_lstchg);
SHADOW_FIELD (sp_min);
SHADOW_FIELD (sp_max);
SHADOW_FIELD (sp_warn);
SHADOW_FIELD (sp_inact);
SHADOW_FIELD (sp_expire);
if (sp->sp_flag == ~0ul)
fputs ("\n", stdout);
else
printf ("%lu\n", sp->sp_flag);
}
static int
shadow_keys (int number, char *key[])
{
int result = 0;
int i;
if (!number)
{
struct spwd *sp;
setspent ();
while ((sp = getspent()) != NULL)
print_shadow (sp);
endpwent ();
return result;
}
for (i = 0; i < number; ++i)
{
struct spwd *sp;
sp = getspnam (key[i]);
if (sp == NULL)
result = 2;
else
print_shadow (sp);
}
return result;
}
struct
{
const char *name;
int (*func) (int number, char *key[]);
} databases[] =
{
#define D(name) { #name, name ## _keys },
D(aliases)
D(ethers)
D(group)
D(hosts)
D(netgroup)
D(networks)
D(passwd)
D(protocols)
D(rpc)
D(services)
D(shadow)
#undef D
{ NULL, NULL }
};
/* build doc */
static inline void
build_doc (void)
{
int i, j, len;
char *short_doc, *long_doc, *doc, *p;
short_doc = _("getent - get entries from administrative database.");
long_doc = _("Supported databases:");
len = strlen (short_doc) + strlen (long_doc) + 3;
for (i = 0; databases[i].name; ++i)
len += strlen (databases[i].name) + 1;
doc = (char *) malloc (len);
if (!doc)
doc = short_doc;
else
{
p = stpcpy (doc, short_doc);
*p++ = '\v';
p = stpcpy (p, long_doc);
*p++ = '\n';
for (i = 0, j = 0; databases[i].name; ++i)
{
len = strlen (databases[i].name);
if (i)
{
if (j + len > 60)
{
j = 0;
*p++ = '\n';
}
else
*p++ = ' ';
}
memcpy (p, databases[i].name, len);
p += len;
j += len + 1;
}
}
argp.doc = doc;
}
/* the main function */
int
main (int argc, char *argv[])
{
int remaining, i;
/* Set locale via LC_ALL. */
setlocale (LC_ALL, "");
/* Set the text message domain. */
textdomain (PACKAGE);
/* Build argp.doc. */
build_doc ();
/* Parse and process arguments. */
argp_parse (&argp, argc, argv, 0, &remaining, NULL);
if ((argc - remaining) < 1)
{
error (0, 0, gettext ("wrong number of arguments"));
argp_help (&argp, stdout, ARGP_HELP_SEE, program_invocation_short_name);
return 1;
}
for (i = 0; databases[i].name; ++i)
if (argv[1][0] == databases[i].name[0]
&& !strcmp (argv[1], databases[i].name))
return databases[i].func (argc - 2, &argv[2]);
fprintf (stderr, _("Unknown database: %s\n"), argv[1]);
argp_help (&argp, stdout, ARGP_HELP_SEE, program_invocation_short_name);
return 1;
}
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