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/* Copyright (C) 1998, 1999, 2003 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 Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; 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 <stdint.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-client.h"
#include "nscd_proto.h"
int __nss_not_use_nscd_passwd;
static int nscd_getpw_r (const char *key, size_t keylen, request_type type,
struct passwd *resultbuf, char *buffer,
size_t buflen) internal_function;
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, strlen (name) + 1, GETPWBYNAME, resultbuf,
buffer, buflen);
}
int
__nscd_getpwuid_r (uid_t uid, struct passwd *resultbuf, char *buffer,
size_t buflen)
{
char buf[12];
size_t n;
n = __snprintf (buf, sizeof (buf), "%d", uid) + 1;
return nscd_getpw_r (buf, n, GETPWBYUID, resultbuf, buffer, buflen);
}
/* Create a socket connected to a name. */
static int
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
internal_function
nscd_getpw_r (const char *key, size_t keylen, request_type type,
struct passwd *resultbuf, char *buffer, size_t buflen)
{
int sock = open_socket ();
request_header req;
pw_response_header pw_resp;
ssize_t nbytes;
struct iovec vec[2];
if (sock == -1)
{
__nss_not_use_nscd_passwd = 1;
return -1;
}
req.version = NSCD_VERSION;
req.type = type;
req.key_len = keylen;
vec[0].iov_base = &req;
vec[0].iov_len = sizeof (request_header);
vec[1].iov_base = (void *) key;
vec[1].iov_len = keylen;
nbytes = TEMP_FAILURE_RETRY (__writev (sock, vec, 2));
if (nbytes != (ssize_t) (sizeof (request_header) + keylen))
{
__close (sock);
return -1;
}
nbytes = TEMP_FAILURE_RETRY (__read (sock, &pw_resp,
sizeof (pw_response_header)));
if (nbytes != (ssize_t) 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)
{
char *p = buffer;
size_t total = (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);
if (buflen < total)
{
__set_errno (ERANGE);
__close (sock);
return ERANGE;
}
/* Set the information we already have. */
resultbuf->pw_uid = pw_resp.pw_uid;
resultbuf->pw_gid = pw_resp.pw_gid;
/* get pw_name */
resultbuf->pw_name = p;
p += pw_resp.pw_name_len;
/* get pw_passwd */
resultbuf->pw_passwd = p;
p += pw_resp.pw_passwd_len;
/* get pw_gecos */
resultbuf->pw_gecos = p;
p += pw_resp.pw_gecos_len;
/* get pw_dir */
resultbuf->pw_dir = p;
p += pw_resp.pw_dir_len;
/* get pw_pshell */
resultbuf->pw_shell = p;
nbytes = TEMP_FAILURE_RETRY (__read (sock, buffer, total));
__close (sock);
return nbytes == (ssize_t) total ? 0 : -1;
}
else
{
__close (sock);
/* The `errno' to some value != ERANGE. */
__set_errno (ENOENT);
return ENOENT;
}
}
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