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/* Copyright (C) 1998 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Thorsten Kukuk <kukuk@uni-paderborn.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. */
#include <errno.h>
#include <grp.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <sys/un.h>
#include "nscd.h"
#include "nscd_proto.h"
int __nss_not_use_nscd_group;
static int __nscd_getgr_r (const char *key, request_type type,
struct group *resultbuf, char *buffer,
size_t buflen);
int
__nscd_getgrnam_r (const char *name, struct group *resultbuf, char *buffer,
size_t buflen)
{
if (name == NULL)
return 1;
return __nscd_getgr_r (name, GETGRBYNAME, resultbuf, buffer, buflen);
}
int
__nscd_getgrgid_r (gid_t gid, struct group *resultbuf, char *buffer,
size_t buflen)
{
char *p = buffer;
int plen;
plen = snprintf (buffer, buflen, "%d", gid);
if (plen == -1)
{
__set_errno (ERANGE);
return -1;
}
p = buffer + plen + 1;
return __nscd_getgr_r (buffer, GETGRBYGID, resultbuf, p, buflen - plen -1);
}
/* Create a socket connected to a name. */
static int
nscd_open_socket (void)
{
struct sockaddr_un addr;
int sock;
int saved_errno = errno;
sock = socket (PF_UNIX, SOCK_STREAM, 0);
if (sock < 0)
{
__set_errno (saved_errno);
return -1;
}
addr.sun_family = AF_UNIX;
strcpy (addr.sun_path, _PATH_NSCDSOCKET);
if (connect (sock, (struct sockaddr *) &addr, sizeof (addr)) < 0)
{
close (sock);
__set_errno (saved_errno);
return -1;
}
return sock;
}
static int
__nscd_getgr_r (const char *key, request_type type, struct group *resultbuf,
char *buffer, size_t buflen)
{
int sock = nscd_open_socket ();
request_header req;
gr_response_header gr_resp;
ssize_t nbytes;
if (sock == -1)
{
/* Returning two signals that contacting the daemon failed. */
__nss_not_use_nscd_group = 1;
return 1;
}
req.version = NSCD_VERSION;
req.type = type;
req.key_len = strlen (key);
nbytes = write (sock, &req, sizeof (request_header));
if (nbytes != sizeof (request_header))
{
close (sock);
return 1;
}
nbytes = write (sock, key, req.key_len);
if (nbytes != req.key_len)
{
close (sock);
return 1;
}
nbytes = read (sock, &gr_resp, sizeof (gr_response_header));
if (nbytes != sizeof (gr_response_header))
{
close (sock);
return 1;
}
if (gr_resp.found == -1)
{
/* The daemon does not cache this database. */
close (sock);
__nss_not_use_nscd_group = 1;
return 1;
}
if (gr_resp.found == 1)
{
size_t i;
char *p = buffer;
if (buflen < gr_resp.gr_name_len + 1)
{
__set_errno (ERANGE);
close (sock);
return -1;
}
resultbuf->gr_name = p;
p += gr_resp.gr_name_len + 1;
buflen -= (gr_resp.gr_name_len + 1);
nbytes = read (sock, resultbuf->gr_name, gr_resp.gr_name_len);
if (nbytes != gr_resp.gr_name_len)
{
close (sock);
return 1;
}
resultbuf->gr_name[gr_resp.gr_name_len] = '\0';
if (buflen < gr_resp.gr_passwd_len + 1)
{
__set_errno (ERANGE);
close (sock);
return -1;
}
resultbuf->gr_passwd = p;
p += gr_resp.gr_passwd_len + 1;
buflen -= (gr_resp.gr_passwd_len + 1);
nbytes = read (sock, resultbuf->gr_passwd, gr_resp.gr_passwd_len);
if (nbytes != gr_resp.gr_passwd_len)
{
close (sock);
return 1;
}
resultbuf->gr_passwd[gr_resp.gr_passwd_len] = '\0';
resultbuf->gr_gid = gr_resp.gr_gid;
if (buflen < ((gr_resp.gr_mem_len + 1) * sizeof (char *)))
{
__set_errno (ERANGE);
close (sock);
return -1;
}
resultbuf->gr_mem = (char **)p;
p += ((gr_resp.gr_mem_len + 1) * sizeof (char *));
buflen -= ((gr_resp.gr_mem_len + 1) * sizeof (char *));
resultbuf->gr_mem[gr_resp.gr_mem_len] = NULL;
for (i = 0; i < gr_resp.gr_mem_len; ++i)
{
size_t len;
nbytes = read (sock, &len, sizeof (len));
if (nbytes != sizeof (len))
{
close (sock);
return 1;
}
if (buflen < (len + 1))
{
__set_errno (ERANGE);
close (sock);
return -1;
}
resultbuf->gr_mem[i] = p;
p += len + 1;
buflen -= (len + 1);
nbytes = read (sock, resultbuf->gr_mem[i], len);
resultbuf->gr_mem[i][len] = '\0';
if (nbytes != len)
{
close (sock);
return 1;
}
}
close (sock);
return 0;
}
else
{
close (sock);
return -1;
}
}
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