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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 <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <sys/uio.h>
#include <sys/un.h>
#include "nscd.h"
int __nss_not_use_nscd_passwd;
static int __nscd_getpw_r (const char *key, request_type type,
struct passwd *resultbuf, char *buffer,
size_t buflen);
int
__nscd_getpwnam_r (const char *name, struct passwd *resultbuf, char *buffer,
size_t buflen)
{
if (name == NULL)
return 1;
return __nscd_getpw_r (name, GETPWBYNAME, resultbuf, buffer, buflen);
}
int
__nscd_getpwuid_r (uid_t uid, struct passwd *resultbuf, char *buffer,
size_t buflen)
{
char *p = buffer;
int plen;
plen = __snprintf (buffer, buflen, "%d", uid);
if (plen == -1)
{
__set_errno (ERANGE);
return -1;
}
p = buffer + plen + 1;
return __nscd_getpw_r (buffer, GETPWBYUID, 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_getpw_r (const char *key, request_type type, struct passwd *resultbuf,
char *buffer, size_t buflen)
{
int sock = nscd_open_socket ();
request_header req;
pw_response_header pw_resp;
ssize_t nbytes;
if (sock == -1)
{
__nss_not_use_nscd_passwd = 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, &pw_resp, sizeof (pw_response_header));
if (nbytes != sizeof (pw_response_header))
{
__close (sock);
return 1;
}
if (pw_resp.found == -1)
{
/* The daemon does not cache this database. */
__close (sock);
__nss_not_use_nscd_passwd = 1;
return 1;
}
if (pw_resp.found == 1)
{
struct iovec vec[5];
char *p = buffer;
if (buflen < (pw_resp.pw_name_len + 1 + pw_resp.pw_passwd_len + 1
+ pw_resp.pw_gecos_len + 1 + pw_resp.pw_dir_len + 1
+ pw_resp.pw_shell_len + 1))
{
__set_errno (ERANGE);
__close (sock);
return -1;
}
/* get pw_name */
vec[0].iov_base = p;
vec[0].iov_len = pw_resp.pw_name_len;
p += pw_resp.pw_name_len + 1;
buflen -= (pw_resp.pw_name_len + 1);
/* get pw_passwd */
vec[1].iov_base = p;
vec[1].iov_len = pw_resp.pw_passwd_len;
p += pw_resp.pw_passwd_len + 1;
buflen -= (pw_resp.pw_passwd_len + 1);
/* get pw_gecos */
vec[2].iov_base = p;
vec[2].iov_len = pw_resp.pw_gecos_len;
p += pw_resp.pw_gecos_len + 1;
buflen -= (pw_resp.pw_gecos_len + 1);
/* get pw_dir */
vec[3].iov_base = p;
vec[3].iov_len = pw_resp.pw_dir_len;
p += pw_resp.pw_dir_len + 1;
buflen -= (pw_resp.pw_dir_len + 1);
/* get pw_pshell */
vec[4].iov_base = p;
vec[4].iov_len = pw_resp.pw_shell_len;
p += pw_resp.pw_shell_len + 1;
buflen -= (pw_resp.pw_shell_len + 1);
nbytes = __readv (sock, vec, 5);
if (nbytes != (pw_resp.pw_name_len + pw_resp.pw_passwd_len
+ pw_resp.pw_gecos_len + pw_resp.pw_dir_len
+ pw_resp.pw_shell_len))
{
__close (sock);
return 1;
}
resultbuf->pw_name = vec[0].iov_base;
resultbuf->pw_name[pw_resp.pw_name_len] = '\0';
resultbuf->pw_passwd = vec[1].iov_base;
resultbuf->pw_passwd[pw_resp.pw_passwd_len] = '\0';
resultbuf->pw_uid = pw_resp.pw_uid;
resultbuf->pw_gid = pw_resp.pw_gid;
resultbuf->pw_gecos = vec[2].iov_base;
resultbuf->pw_gecos[pw_resp.pw_gecos_len] = '\0';
resultbuf->pw_dir = vec[3].iov_base;
resultbuf->pw_dir[pw_resp.pw_dir_len] = '\0';
resultbuf->pw_shell = vec[4].iov_base;
resultbuf->pw_shell[pw_resp.pw_shell_len] = '\0';
__close (sock);
return 0;
}
else
{
__close (sock);
return -1;
}
}
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