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glibc  2.9
Defines | Functions | Variables
getent.c File Reference
#include <aliases.h>
#include <argp.h>
#include <ctype.h>
#include <error.h>
#include <grp.h>
#include <libintl.h>
#include <locale.h>
#include <mcheck.h>
#include <netdb.h>
#include <pwd.h>
#include <shadow.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <arpa/inet.h>
#include <arpa/nameser.h>
#include <netinet/ether.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <version.h>

Go to the source code of this file.

Defines

#define PACKAGE   _libc_intl_domainname
#define SHADOW_FIELD(n)
#define D(name)   { #name, name ## _keys },

Functions

static void print_version (FILE *stream, struct argp_state *state)
static error_t parse_option (int key, char *arg, struct argp_state *state)
static char * more_help (int key, const char *text, void *input)
static void print_aliases (struct aliasent *alias)
static int aliases_keys (int number, char *key[])
static int ethers_keys (int number, char *key[])
static void print_group (struct group *grp)
static int group_keys (int number, char *key[])
static void print_hosts (struct hostent *host)
static int hosts_keys (int number, char *key[])
static int ahosts_keys_int (int af, int xflags, int number, char *key[])
static int ahosts_keys (int number, char *key[])
static int ahostsv4_keys (int number, char *key[])
static int ahostsv6_keys (int number, char *key[])
static int netgroup_keys (int number, char *key[])
static void print_networks (struct netent *net)
static int networks_keys (int number, char *key[])
static void print_passwd (struct passwd *pwd)
static int passwd_keys (int number, char *key[])
static void print_protocols (struct protoent *proto)
static int protocols_keys (int number, char *key[])
static void print_rpc (struct rpcent *rpc)
static int rpc_keys (int number, char *key[])
static void print_services (struct servent *serv)
static int services_keys (int number, char *key[])
static void print_shadow (struct spwd *sp)
static int shadow_keys (int number, char *key[])
int main (int argc, char *argv[])

Variables

void(* argp_program_version_hook )(FILE *, struct argp_state *) = print_version
static const char args_doc [] = N_("database [key ...]")
static struct argp_option []
static const char doc []
static struct argp
struct {
const char * name
int(* func )(int number, char *key[])
databases []

Define Documentation

#define D (   name)    { #name, name ## _keys },

Definition at line 45 of file getent.c.

#define SHADOW_FIELD (   n)
Value:
if (sp->n == -1)                                                     \
    putchar_unlocked (':');                                          \
  else									      \
    printf ("%ld:", sp->n)

Function Documentation

static int ahosts_keys ( int  number,
char *  key[] 
) [static]

Definition at line 384 of file getent.c.

{
  return ahosts_keys_int (AF_UNSPEC, 0, number, key);
}

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static int ahosts_keys_int ( int  af,
int  xflags,
int  number,
char *  key[] 
) [static]

Definition at line 300 of file getent.c.

{
  int result = 0;
  int i;
  struct hostent *host;

  if (number == 0)
    {
      sethostent (0);
      while ((host = gethostent ()) != NULL)
       print_hosts (host);
      endhostent ();
      return result;
    }

  struct addrinfo hint;
  memset (&hint, '\0', sizeof (hint));
  hint.ai_flags = AI_V4MAPPED | AI_ADDRCONFIG | AI_CANONNAME | xflags;
  hint.ai_family = af;

  for (i = 0; i < number; ++i)
    {
      struct addrinfo *res;

      if (getaddrinfo (key[i], NULL, &hint, &res) != 0)
       result = 2;
      else
       {
         struct addrinfo *runp = res;

         while (runp != NULL)
           {
             char sockbuf[20];
             const char *sockstr;
             if (runp->ai_socktype == SOCK_STREAM)
              sockstr = "STREAM";
             else if (runp->ai_socktype == SOCK_DGRAM)
              sockstr = "DGRAM";
             else if (runp->ai_socktype == SOCK_RAW)
              sockstr = "RAW";
#ifdef SOCK_SEQPACKET
             else if (runp->ai_socktype == SOCK_SEQPACKET)
              sockstr = "SEQPACKET";
#endif
#ifdef SOCK_RDM
             else if (runp->ai_socktype == SOCK_RDM)
              sockstr = "RDM";
#endif
#ifdef SOCK_DCCP
             else if (runp->ai_socktype == SOCK_DCCP)
              sockstr = "DCCP";
#endif
#ifdef SOCK_PACKET
             else if (runp->ai_socktype == SOCK_PACKET)
              sockstr = "PACKET";
#endif
             else
              {
                snprintf (sockbuf, sizeof (sockbuf), "%d",
                         runp->ai_socktype);
                sockstr = sockbuf;
              }

             char buf[INET6_ADDRSTRLEN];
             printf ("%-15s %-6s %s\n",
                    inet_ntop (runp->ai_family,
                             runp->ai_family == AF_INET
                             ? (void *) &((struct sockaddr_in *) runp->ai_addr)->sin_addr
                             : (void *) &((struct sockaddr_in6 *) runp->ai_addr)->sin6_addr,
                             buf, sizeof (buf)),
                    sockstr,
                    runp->ai_canonname ?: "");

             runp = runp->ai_next;
           }

         freeaddrinfo (res);
       }
    }

  return result;
}

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static int ahostsv4_keys ( int  number,
char *  key[] 
) [static]

Definition at line 390 of file getent.c.

{
  return ahosts_keys_int (AF_INET, 0, number, key);
}

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static int ahostsv6_keys ( int  number,
char *  key[] 
) [static]

Definition at line 396 of file getent.c.

{
  return ahosts_keys_int (AF_INET6, AI_V4MAPPED, number, key);
}

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static int aliases_keys ( int  number,
char *  key[] 
) [static]

Definition at line 108 of file getent.c.

{
  int result = 0;
  int i;
  struct aliasent *alias;

  if (number == 0)
    {
      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;
}

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static int ethers_keys ( int  number,
char *  key[] 
) [static]

Definition at line 138 of file getent.c.

{
  int result = 0;
  int i;

  if (number == 0)
    {
      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 != NULL)
       {
         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;
}

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static int group_keys ( int  number,
char *  key[] 
) [static]

Definition at line 201 of file getent.c.

{
  int result = 0;
  int i;
  struct group *grp;

  if (number == 0)
    {
      setgrent ();
      while ((grp = getgrent ()) != NULL)
       print_group (grp);
      endgrent ();
      return result;
    }

  for (i = 0; i < number; ++i)
    {
      errno = 0;
      char *ep;
      gid_t arg_gid = strtoul(key[i], &ep, 10);

      if (errno != EINVAL && *key[i] != '\0' && *ep == '\0')
       /* Valid numeric gid.  */
       grp = getgrgid (arg_gid);
      else
       grp = getgrnam (key[i]);

      if (grp == NULL)
       result = 2;
      else
       print_group (grp);
    }

  return result;
}

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static int hosts_keys ( int  number,
char *  key[] 
) [static]

Definition at line 262 of file getent.c.

{
  int result = 0;
  int i;
  struct hostent *host;

  if (number == 0)
    {
      sethostent (0);
      while ((host = gethostent ()) != NULL)
       print_hosts (host);
      endhostent ();
      return result;
    }

  for (i = 0; i < number; ++i)
    {
      struct hostent *host = NULL;
      char addr[IN6ADDRSZ];

      if (inet_pton (AF_INET6, key[i], &addr) > 0)
       host = gethostbyaddr (addr, IN6ADDRSZ, AF_INET6);
      else if (inet_pton (AF_INET, key[i], &addr) > 0)
       host = gethostbyaddr (addr, INADDRSZ, 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;
}

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int main ( int  argc,
char *  argv[] 
)

Definition at line 858 of file getent.c.

{
  /* Debugging support.  */
  mtrace ();

  /* Set locale via LC_ALL.  */
  setlocale (LC_ALL, "");
  /* Set the text message domain.  */
  textdomain (PACKAGE);

  /* Parse and process arguments.  */
  int remaining;
  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 (int i = 0; databases[i].name; ++i)
    if (argv[remaining][0] == databases[i].name[0]
       && !strcmp (argv[remaining], databases[i].name))
      return databases[i].func (argc - remaining - 1, &argv[remaining + 1]);

  fprintf (stderr, _("Unknown database: %s\n"), argv[remaining]);
  argp_help (&argp, stdout, ARGP_HELP_SEE, program_invocation_short_name);
  return 1;
}

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static char * more_help ( int  key,
const char *  text,
void *  input 
) [static]

Definition at line 811 of file getent.c.

{
  switch (key)
    {
      size_t len;
      char *doc;
      FILE *fp;

    case ARGP_KEY_HELP_EXTRA:
      /* We print some extra information.  */
      fp = open_memstream (&doc, &len);
      if (fp != NULL)
       {
         fputs_unlocked (_("Supported databases:\n"), fp);

         for (int i = 0, col = 0; databases[i].name != NULL; ++i)
           {
             len = strlen (databases[i].name);
             if (i != 0)
              {
                if (col + len > 72)
                  {
                    col = 0;
                    fputc_unlocked ('\n', fp);
                  }
                else
                  fputc_unlocked (' ', fp);
              }

             fputs_unlocked (databases[i].name, fp);
             col += len + 1;
           }

         if (fclose (fp) == 0)
           return doc;
       }
      break;

    default:
      break;
    }
  return (char *) text;
}

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static int netgroup_keys ( int  number,
char *  key[] 
) [static]

Definition at line 403 of file getent.c.

{
  int result = 0;
  int i;

  if (number == 0)
    {
      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];

         printf ("%-21s", key[i]);

         while (getnetgrent (p, p + 1, p + 2))
           printf (" (%s, %s, %s)", p[0] ?: " ", p[1] ?: "", p[2] ?: "");
         putchar_unlocked ('\n');
       }
    }

  endnetgrent ();

  return result;
}

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static int networks_keys ( int  number,
char *  key[] 
) [static]

Definition at line 458 of file getent.c.

{
  int result = 0;
  int i;
  struct netent *net;

  if (number == 0)
    {
      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;
}

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static error_t parse_option ( int  key,
char *  arg,
struct argp_state state 
) [static]

Definition at line 777 of file getent.c.

{
  char *endp;
  switch (key)
    {
    case 's':
      endp = strchr (arg, ':');
      if (endp == NULL)
       /* No specific database, change them all.  */
       for (int i = 0; databases[i].name != NULL; ++i)
         __nss_configure_lookup (databases[i].name, arg);
      else
       {
         int i;
         for (i = 0; databases[i].name != NULL; ++i)
           if (strncmp (databases[i].name, arg, endp - arg) == 0)
             {
              __nss_configure_lookup (databases[i].name, endp + 1);
              break;
             }
         if (databases[i].name == NULL)
           error (EXIT_FAILURE, 0, gettext ("Unknown database name"));
       }
      break;

    default:
      return ARGP_ERR_UNKNOWN;
    }

  return 0;
}

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static int passwd_keys ( int  number,
char *  key[] 
) [static]

Definition at line 504 of file getent.c.

{
  int result = 0;
  int i;
  struct passwd *pwd;

  if (number == 0)
    {
      setpwent ();
      while ((pwd = getpwent ()) != NULL)
       print_passwd (pwd);
      endpwent ();
      return result;
    }

  for (i = 0; i < number; ++i)
    {
      errno = 0;
      char *ep;
      uid_t arg_uid = strtoul(key[i], &ep, 10);

      if (errno != EINVAL && *key[i] != '\0' && *ep == '\0')
       /* Valid numeric uid.  */
       pwd = getpwuid (arg_uid);
      else
       pwd = getpwnam (key[i]);

      if (pwd == NULL)
       result = 2;
      else
       print_passwd (pwd);
    }

  return result;
}

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static void print_aliases ( struct aliasent alias) [inline, static]

Definition at line 93 of file getent.c.

{
  unsigned int i = 0;

  printf ("%s: ", alias->alias_name);
  for  (i = strlen (alias->alias_name); i < 14; ++i)
    fputs_unlocked (" ", stdout);

  for (i = 0; i < alias->alias_members_len; ++i)
    printf ("%s%s",
           alias->alias_members [i],
           i + 1 == alias->alias_members_len ? "\n" : ", ");
}

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static void print_group ( struct group grp) [inline, static]

Definition at line 182 of file getent.c.

{
  unsigned int i = 0;

  printf ("%s:%s:%lu:", grp->gr_name ? grp->gr_name : "",
         grp->gr_passwd ? grp->gr_passwd : "",
         (unsigned long int) grp->gr_gid);

  while (grp->gr_mem[i] != NULL)
    {
      fputs_unlocked (grp->gr_mem[i], stdout);
      ++i;
      if (grp->gr_mem[i] != NULL)
       putchar_unlocked (',');
    }
  putchar_unlocked ('\n');
}

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static void print_hosts ( struct hostent host) [static]

Definition at line 239 of file getent.c.

{
  unsigned int cnt;

  for (cnt = 0; host->h_addr_list[cnt] != NULL; ++cnt)
    {
      char buf[INET6_ADDRSTRLEN];
      const char *ip = inet_ntop (host->h_addrtype, host->h_addr_list[cnt],
                              buf, sizeof (buf));

      printf ("%-15s %s", ip, host->h_name);

      unsigned int i;
      for (i = 0; host->h_aliases[i] != NULL; ++i)
       {
         putchar_unlocked (' ');
         fputs_unlocked (host->h_aliases[i], stdout);
       }
      putchar_unlocked ('\n');
    }
}

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static void print_networks ( struct netent net) [static]

Definition at line 437 of file getent.c.

{
  unsigned int i;
  struct in_addr ip;
  ip.s_addr = htonl (net->n_net);

  printf ("%-21s %s", net->n_name, inet_ntoa (ip));

  i = 0;
  while (net->n_aliases[i] != NULL)
    {
      putchar_unlocked (' ');
      fputs_unlocked (net->n_aliases[i], stdout);
      ++i;
      if (net->n_aliases[i] != NULL)
       putchar_unlocked (',');
    }
  putchar_unlocked ('\n');
}

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static void print_passwd ( struct passwd pwd) [inline, static]

Definition at line 491 of file getent.c.

{
  printf ("%s:%s:%lu:%lu:%s:%s:%s\n",
         pwd->pw_name ? pwd->pw_name : "",
         pwd->pw_passwd ? pwd->pw_passwd : "",
         (unsigned long int) pwd->pw_uid,
         (unsigned long int) pwd->pw_gid,
         pwd->pw_gecos ? pwd->pw_gecos : "",
         pwd->pw_dir ? pwd->pw_dir : "",
         pwd->pw_shell ? pwd->pw_shell : "");
}

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static void print_protocols ( struct protoent proto) [inline, static]

Definition at line 542 of file getent.c.

{
  unsigned int i;

  printf ("%-21s %d", proto->p_name, proto->p_proto);

  i = 0;
  while (proto->p_aliases[i] != NULL)
    {
      putchar_unlocked (' ');
      fputs_unlocked (proto->p_aliases[i], stdout);
      ++i;
    }
  putchar_unlocked ('\n');
}

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static void print_rpc ( struct rpcent rpc) [inline, static]

Definition at line 592 of file getent.c.

{
  int i;

  printf ("%-15s %d%s",
         rpc->r_name, rpc->r_number, rpc->r_aliases[0] ? " " : "");

  for (i = 0; rpc->r_aliases[i]; ++i)
    printf (" %s", rpc->r_aliases[i]);
  putchar_unlocked ('\n');
}

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static void print_services ( struct servent serv) [static]

Definition at line 638 of file getent.c.

{
  unsigned int i;

  printf ("%-21s %d/%s", serv->s_name, ntohs (serv->s_port), serv->s_proto);

  i = 0;
  while (serv->s_aliases[i] != NULL)
    {
      putchar_unlocked (' ');
      fputs_unlocked (serv->s_aliases[i], stdout);
      ++i;
    }
  putchar_unlocked ('\n');
}

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static void print_shadow ( struct spwd sp) [static]

Definition at line 694 of file getent.c.

{
  printf ("%s:%s:",
         sp->sp_namp ? sp->sp_namp : "",
         sp->sp_pwdp ? sp->sp_pwdp : "");

#define SHADOW_FIELD(n) \
  if (sp->n == -1)                                                   \
    putchar_unlocked (':');                                          \
  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)
    putchar_unlocked ('\n');
  else
    printf ("%lu\n", sp->sp_flag);
}

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static void print_version ( FILE stream,
struct argp_state state 
) [static]

Definition at line 80 of file getent.c.

{
  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\
"), "2008");
  fprintf (stream, gettext ("Written by %s.\n"), "Thorsten Kukuk");
}

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static int protocols_keys ( int  number,
char *  key[] 
) [static]

Definition at line 559 of file getent.c.

{
  int result = 0;
  int i;
  struct protoent *proto;

  if (number == 0)
    {
      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;
}

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static int rpc_keys ( int  number,
char *  key[] 
) [static]

Definition at line 605 of file getent.c.

{
  int result = 0;
  int i;
  struct rpcent *rpc;

  if (number == 0)
    {
      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;
}

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static int services_keys ( int  number,
char *  key[] 
) [static]

Definition at line 655 of file getent.c.

{
  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)
       *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;
}

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static int shadow_keys ( int  number,
char *  key[] 
) [static]

Definition at line 719 of file getent.c.

{
  int result = 0;
  int i;

  if (number == 0)
    {
      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;
}

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Variable Documentation

struct argp [static]
Initial value:
  {
    args_options, parse_option, args_doc, doc, NULL, more_help
  }

Definition at line 73 of file getent.c.

struct argp_option[] [static]
Initial value:
  {
    { "service", 's', "CONFIG", 0, N_("Service configuration to be used") },
    { NULL, 0, NULL, 0, NULL },
  }

Definition at line 55 of file getent.c.

Definition at line 49 of file getent.c.

const char args_doc[] = N_("database [key ...]") [static]

Definition at line 52 of file getent.c.

struct { ... } databases[]
const char doc[] [static]
Initial value:
 N_("Get entries from administrative database.\v\
For bug reporting instructions, please see:\n\
<http://www.gnu.org/software/libc/bugs.html>.\n")

Definition at line 62 of file getent.c.