glibc/nss/getent.c

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/* Copyright (c) 1998, 1999, 2000 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
supported databases: passwd, group, hosts, services, protocols
and networks */
#include <argp.h>
#include <grp.h>
#include <pwd.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 <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 ...]");
/* Short description of program. */
static const char doc[] =
N_("getent - get entries from administrative database.");
/* Data structure to communicate with argp functions. */
static struct argp argp = {
NULL, NULL, args_doc, doc,
};
/* 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\
"), "1999");
fprintf (stream, gettext ("Written by %s.\n"), "Thorsten Kukuk");
}
/* 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 inline int
group_keys (int number, char *key[])
{
int result = 0;
int i;
for (i = 0; i < number; ++i)
{
struct group *grp;
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 networks */
static inline void
print_networks (struct netent *net)
{
unsigned int i;
struct in_addr ip;
ip.s_addr = htonl (net->n_net);
fputs (net->n_name, stdout);
for (i = strlen (net->n_name); i < 22; ++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 inline int
networks_keys (int number, char *key[])
{
int result = 0;
int i;
for (i = 0; i < number; ++i)
{
struct netent *net;
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 inline int
passwd_keys (int number, char *key[])
{
int result = 0;
int i;
for (i = 0; i < number; ++i)
{
struct passwd *pwd;
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 < 22; ++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 inline int
protocols_keys (int number, char *key[])
{
int result = 0;
int i;
for (i = 0; i < number; ++i)
{
struct protoent *proto;
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;
}
/* 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 inline int
hosts_keys (int number, char *key[])
{
int result = 0;
int i;
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;
}
/* for services */
static inline void
print_services (struct servent *serv)
{
unsigned int i;
fputs (serv->s_name, stdout);
for (i = strlen (serv->s_name); i < 22; ++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 inline int
services_keys (int number, char *key[])
{
int result = 0;
int i;
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
{
while ((serv = getservent ()) != NULL)
if (strcmp (serv->s_name, 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;
}
/* the main function */
int
main (int argc, char *argv[])
{
int remaining;
/* Set locale via LC_ALL. */
setlocale (LC_ALL, "");
/* Set the text message domain. */
textdomain (PACKAGE);
/* 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;
}
switch(argv[1][0])
{
case 'g': /* group */
if (strcmp (argv[1], "group") == 0)
{
if (argc == 2)
{
struct group *grp;
setgrent ();
while ((grp = getgrent()) != NULL)
print_group (grp);
endgrent ();
}
else
return group_keys (argc - 2, &argv[2]);
}
else
goto error;
break;
case 'h': /* hosts */
if (strcmp (argv[1], "hosts") == 0)
{
if (argc == 2)
{
struct hostent *host;
sethostent (0);
while ((host = gethostent()) != NULL)
print_hosts (host);
endhostent ();
}
else
return hosts_keys (argc - 2, &argv[2]);
}
else
goto error;
break;
case 'n': /* networks */
if (strcmp (argv[1], "networks") == 0)
{
if (argc == 2)
{
struct netent *net;
setnetent (0);
while ((net = getnetent()) != NULL)
print_networks (net);
endnetent ();
}
else
return networks_keys (argc - 2, &argv[2]);
}
else
goto error;
break;
case 'p': /* passwd, protocols */
if (strcmp (argv[1], "passwd") == 0)
{
if (argc == 2)
{
struct passwd *pwd;
setpwent ();
while ((pwd = getpwent()) != NULL)
print_passwd (pwd);
endpwent ();
}
else
return passwd_keys (argc - 2, &argv[2]);
}
else if (strcmp (argv[1], "protocols") == 0)
{
if (argc == 2)
{
struct protoent *proto;
setprotoent (0);
while ((proto = getprotoent()) != NULL)
print_protocols (proto);
endprotoent ();
}
else
return protocols_keys (argc - 2, &argv[2]);
}
else
goto error;
break;
case 's': /* services */
if (strcmp (argv[1], "services") == 0)
{
if (argc == 2)
{
struct servent *serv;
setservent (0);
while ((serv = getservent()) != NULL)
print_services (serv);
endservent ();
}
else
return services_keys (argc - 2, &argv[2]);
}
else
goto error;
break;
default:
error:
fprintf (stderr, _("Unknown database: %s\n"), argv[1]);
argp_help (&argp, stdout, ARGP_HELP_SEE, program_invocation_short_name);
return 1;
}
return 0;
}