160 lines
4.0 KiB
C
160 lines
4.0 KiB
C
/* Copyright (C) 1998, 1999, 2003 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 Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the 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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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <errno.h>
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#include <pwd.h>
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#include <stdint.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-client.h"
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#include "nscd_proto.h"
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int __nss_not_use_nscd_passwd;
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static int nscd_getpw_r (const char *key, size_t keylen, request_type type,
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struct passwd *resultbuf, char *buffer,
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size_t buflen) internal_function;
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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, strlen (name) + 1, GETPWBYNAME, resultbuf,
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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 buf[12];
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size_t n;
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n = __snprintf (buf, sizeof (buf), "%d", uid) + 1;
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return nscd_getpw_r (buf, n, GETPWBYUID, resultbuf, buffer, buflen);
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}
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static int
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internal_function
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nscd_getpw_r (const char *key, size_t keylen, request_type type,
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struct passwd *resultbuf, 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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struct iovec vec[2];
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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 = keylen;
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vec[0].iov_base = &req;
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vec[0].iov_len = sizeof (request_header);
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vec[1].iov_base = (void *) key;
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vec[1].iov_len = keylen;
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nbytes = TEMP_FAILURE_RETRY (__writev (sock, vec, 2));
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if (nbytes != (ssize_t) (sizeof (request_header) + keylen))
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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 = TEMP_FAILURE_RETRY (__read (sock, &pw_resp,
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sizeof (pw_response_header)));
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if (nbytes != (ssize_t) 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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char *p = buffer;
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size_t total = (pw_resp.pw_name_len + pw_resp.pw_passwd_len
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+ pw_resp.pw_gecos_len + pw_resp.pw_dir_len
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+ pw_resp.pw_shell_len);
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if (buflen < total)
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{
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__set_errno (ERANGE);
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__close (sock);
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return ERANGE;
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}
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/* Set the information we already have. */
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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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/* get pw_name */
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resultbuf->pw_name = p;
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p += pw_resp.pw_name_len;
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/* get pw_passwd */
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resultbuf->pw_passwd = p;
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p += pw_resp.pw_passwd_len;
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/* get pw_gecos */
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resultbuf->pw_gecos = p;
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p += pw_resp.pw_gecos_len;
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/* get pw_dir */
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resultbuf->pw_dir = p;
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p += pw_resp.pw_dir_len;
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/* get pw_pshell */
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resultbuf->pw_shell = p;
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nbytes = TEMP_FAILURE_RETRY (__read (sock, buffer, total));
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__close (sock);
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return nbytes == (ssize_t) total ? 0 : -1;
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}
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else
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{
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__close (sock);
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/* The `errno' to some value != ERANGE. */
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__set_errno (ENOENT);
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return ENOENT;
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}
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}
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