211 lines
5.3 KiB
C
211 lines
5.3 KiB
C
/* Copyright (C) 1998 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Thorsten Kukuk <kukuk@uni-paderborn.de>, 1998.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <errno.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/socket.h>
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#include <sys/uio.h>
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#include <sys/un.h>
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#include "nscd.h"
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int __nss_not_use_nscd_passwd;
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static int __nscd_getpw_r (const char *key, request_type type,
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struct passwd *resultbuf, char *buffer,
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size_t buflen);
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int
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__nscd_getpwnam_r (const char *name, struct passwd *resultbuf, char *buffer,
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size_t buflen)
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{
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if (name == NULL)
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return 1;
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return __nscd_getpw_r (name, GETPWBYNAME, resultbuf, buffer, buflen);
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}
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int
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__nscd_getpwuid_r (uid_t uid, struct passwd *resultbuf, char *buffer,
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size_t buflen)
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{
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char *p = buffer;
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int plen;
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plen = snprintf (buffer, buflen, "%d", uid);
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if (plen == -1)
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{
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__set_errno (ERANGE);
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return -1;
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}
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p = buffer + plen + 1;
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return __nscd_getpw_r (buffer, GETPWBYUID, resultbuf, p, buflen - plen -1);
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}
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/* Create a socket connected to a name. */
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static int
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nscd_open_socket (void)
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{
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struct sockaddr_un addr;
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int sock;
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int saved_errno = errno;
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sock = socket (PF_UNIX, SOCK_STREAM, 0);
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if (sock < 0)
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{
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__set_errno (saved_errno);
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return -1;
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}
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addr.sun_family = AF_UNIX;
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strcpy (addr.sun_path, _PATH_NSCDSOCKET);
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if (connect (sock, (struct sockaddr *) &addr, sizeof (addr)) < 0)
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{
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close (sock);
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__set_errno (saved_errno);
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return -1;
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}
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return sock;
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}
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static int
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__nscd_getpw_r (const char *key, request_type type, struct passwd *resultbuf,
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char *buffer, size_t buflen)
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{
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int sock = nscd_open_socket ();
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request_header req;
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pw_response_header pw_resp;
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ssize_t nbytes;
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if (sock == -1)
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{
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__nss_not_use_nscd_passwd = 1;
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return 1;
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}
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req.version = NSCD_VERSION;
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req.type = type;
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req.key_len = strlen (key);
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nbytes = write (sock, &req, sizeof (request_header));
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if (nbytes != sizeof (request_header))
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{
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close (sock);
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return 1;
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}
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nbytes = write (sock, key, req.key_len);
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if (nbytes != req.key_len)
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{
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close (sock);
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return 1;
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}
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nbytes = read (sock, &pw_resp, sizeof (pw_response_header));
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if (nbytes != sizeof (pw_response_header))
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{
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close (sock);
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return 1;
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}
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if (pw_resp.found == -1)
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{
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/* The daemon does not cache this database. */
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close (sock);
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__nss_not_use_nscd_passwd = 1;
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return 1;
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}
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if (pw_resp.found == 1)
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{
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struct iovec vec[5];
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char *p = buffer;
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if (buflen < pw_resp.pw_name_len + 1 + pw_resp.pw_passwd_len + 1
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+ pw_resp.pw_gecos_len + 1 + pw_resp.pw_dir_len + 1
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+ pw_resp.pw_shell_len + 1)
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{
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__set_errno (ERANGE);
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close (sock);
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return -1;
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}
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/* get pw_name */
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vec[0].iov_base = p;
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vec[0].iov_len = pw_resp.pw_name_len;
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p += pw_resp.pw_name_len + 1;
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buflen -= (pw_resp.pw_name_len + 1);
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/* get pw_passwd */
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vec[1].iov_base = p;
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vec[1].iov_len = pw_resp.pw_passwd_len;
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p += pw_resp.pw_passwd_len + 1;
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buflen -= (pw_resp.pw_passwd_len + 1);
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/* get pw_gecos */
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vec[2].iov_base = p;
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vec[2].iov_len = pw_resp.pw_gecos_len;
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p += pw_resp.pw_gecos_len + 1;
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buflen -= (pw_resp.pw_gecos_len + 1);
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/* get pw_dir */
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vec[3].iov_base = p;
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vec[3].iov_len = pw_resp.pw_dir_len;
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p += pw_resp.pw_dir_len + 1;
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buflen -= (pw_resp.pw_dir_len + 1);
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/* get pw_pshell */
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vec[4].iov_base = p;
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vec[4].iov_len = pw_resp.pw_dir_len;
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p += pw_resp.pw_dir_len + 1;
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buflen -= (pw_resp.pw_dir_len + 1);
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nbytes = readv (sock, vec, 5);
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if (nbytes != pw_resp.pw_name_len + 1 + pw_resp.pw_passwd_len + 1 +
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pw_resp.pw_gecos_len + 1 + pw_resp.pw_dir_len + 1 +
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pw_resp.pw_shell_len + 1)
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{
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close (sock);
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return 1;
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}
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resultbuf->pw_name = vec[0].iov_base;
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resultbuf->pw_name[pw_resp.pw_name_len] = '\0';
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resultbuf->pw_passwd = vec[1].iov_base;
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resultbuf->pw_passwd[pw_resp.pw_passwd_len] = '\0';
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resultbuf->pw_uid = pw_resp.pw_uid;
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resultbuf->pw_gid = pw_resp.pw_gid;
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resultbuf->pw_gecos = vec[2].iov_base;
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resultbuf->pw_gecos[pw_resp.pw_gecos_len] = '\0';
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resultbuf->pw_dir = vec[3].iov_base;
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resultbuf->pw_dir[pw_resp.pw_dir_len] = '\0';
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resultbuf->pw_shell = vec[4].iov_base;
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resultbuf->pw_shell[pw_resp.pw_shell_len] = '\0';
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close (sock);
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return 0;
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}
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else
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{
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close (sock);
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return -1;
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}
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}
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