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[glibc.git] / nscd / nscd_getpw_r.c
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1 /* Copyright (C) 1998 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Thorsten Kukuk <kukuk@uni-paderborn.de>, 1998.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public License as
7 published by the Free Software Foundation; either version 2 of the
8 License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Library General Public License for more details.
15 You should have received a copy of the GNU Library General Public
16 License along with the GNU C Library; see the file COPYING.LIB. If not,
17 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA. */
20 #include <errno.h>
21 #include <pwd.h>
22 #include <stdio.h>
23 #include <stdlib.h>
24 #include <string.h>
25 #include <unistd.h>
26 #include <sys/socket.h>
27 #include <sys/uio.h>
28 #include <sys/un.h>
30 #include "nscd.h"
32 int __nss_not_use_nscd_passwd;
34 static int __nscd_getpw_r (const char *key, request_type type,
35 struct passwd *resultbuf, char *buffer,
36 size_t buflen);
38 int
39 __nscd_getpwnam_r (const char *name, struct passwd *resultbuf, char *buffer,
40 size_t buflen)
42 if (name == NULL)
43 return 1;
45 return __nscd_getpw_r (name, GETPWBYNAME, resultbuf, buffer, buflen);
48 int
49 __nscd_getpwuid_r (uid_t uid, struct passwd *resultbuf, char *buffer,
50 size_t buflen)
52 char *p = buffer;
53 int plen;
55 plen = __snprintf (buffer, buflen, "%d", uid);
56 if (plen == -1)
58 __set_errno (ERANGE);
59 return -1;
61 p = buffer + plen + 1;
63 return __nscd_getpw_r (buffer, GETPWBYUID, resultbuf, p, buflen - plen -1);
66 /* Create a socket connected to a name. */
67 static int
68 nscd_open_socket (void)
70 struct sockaddr_un addr;
71 int sock;
72 int saved_errno = errno;
74 sock = __socket (PF_UNIX, SOCK_STREAM, 0);
75 if (sock < 0)
77 __set_errno (saved_errno);
78 return -1;
81 addr.sun_family = AF_UNIX;
82 strcpy (addr.sun_path, _PATH_NSCDSOCKET);
83 if (__connect (sock, (struct sockaddr *) &addr, sizeof (addr)) < 0)
85 close (sock);
86 __set_errno (saved_errno);
87 return -1;
90 return sock;
93 static int
94 __nscd_getpw_r (const char *key, request_type type, struct passwd *resultbuf,
95 char *buffer, size_t buflen)
97 int sock = nscd_open_socket ();
98 request_header req;
99 pw_response_header pw_resp;
100 ssize_t nbytes;
102 if (sock == -1)
104 __nss_not_use_nscd_passwd = 1;
105 return 1;
108 req.version = NSCD_VERSION;
109 req.type = type;
110 req.key_len = strlen (key);
111 nbytes = write (sock, &req, sizeof (request_header));
112 if (nbytes != sizeof (request_header))
114 close (sock);
115 return 1;
118 nbytes = write (sock, key, req.key_len);
119 if (nbytes != req.key_len)
121 close (sock);
122 return 1;
125 nbytes = read (sock, &pw_resp, sizeof (pw_response_header));
126 if (nbytes != sizeof (pw_response_header))
128 close (sock);
129 return 1;
132 if (pw_resp.found == -1)
134 /* The daemon does not cache this database. */
135 close (sock);
136 __nss_not_use_nscd_passwd = 1;
137 return 1;
140 if (pw_resp.found == 1)
142 struct iovec vec[5];
143 char *p = buffer;
145 if (buflen < (pw_resp.pw_name_len + 1 + pw_resp.pw_passwd_len + 1
146 + pw_resp.pw_gecos_len + 1 + pw_resp.pw_dir_len + 1
147 + pw_resp.pw_shell_len + 1))
149 __set_errno (ERANGE);
150 close (sock);
151 return -1;
154 /* get pw_name */
155 vec[0].iov_base = p;
156 vec[0].iov_len = pw_resp.pw_name_len;
157 p += pw_resp.pw_name_len + 1;
158 buflen -= (pw_resp.pw_name_len + 1);
159 /* get pw_passwd */
160 vec[1].iov_base = p;
161 vec[1].iov_len = pw_resp.pw_passwd_len;
162 p += pw_resp.pw_passwd_len + 1;
163 buflen -= (pw_resp.pw_passwd_len + 1);
164 /* get pw_gecos */
165 vec[2].iov_base = p;
166 vec[2].iov_len = pw_resp.pw_gecos_len;
167 p += pw_resp.pw_gecos_len + 1;
168 buflen -= (pw_resp.pw_gecos_len + 1);
169 /* get pw_dir */
170 vec[3].iov_base = p;
171 vec[3].iov_len = pw_resp.pw_dir_len;
172 p += pw_resp.pw_dir_len + 1;
173 buflen -= (pw_resp.pw_dir_len + 1);
174 /* get pw_pshell */
175 vec[4].iov_base = p;
176 vec[4].iov_len = pw_resp.pw_shell_len;
177 p += pw_resp.pw_shell_len + 1;
178 buflen -= (pw_resp.pw_shell_len + 1);
180 nbytes = __readv (sock, vec, 5);
181 if (nbytes != (pw_resp.pw_name_len + pw_resp.pw_passwd_len
182 + pw_resp.pw_gecos_len + pw_resp.pw_dir_len
183 + pw_resp.pw_shell_len))
185 close (sock);
186 return 1;
189 resultbuf->pw_name = vec[0].iov_base;
190 resultbuf->pw_name[pw_resp.pw_name_len] = '\0';
191 resultbuf->pw_passwd = vec[1].iov_base;
192 resultbuf->pw_passwd[pw_resp.pw_passwd_len] = '\0';
193 resultbuf->pw_uid = pw_resp.pw_uid;
194 resultbuf->pw_gid = pw_resp.pw_gid;
195 resultbuf->pw_gecos = vec[2].iov_base;
196 resultbuf->pw_gecos[pw_resp.pw_gecos_len] = '\0';
197 resultbuf->pw_dir = vec[3].iov_base;
198 resultbuf->pw_dir[pw_resp.pw_dir_len] = '\0';
199 resultbuf->pw_shell = vec[4].iov_base;
200 resultbuf->pw_shell[pw_resp.pw_shell_len] = '\0';
202 close (sock);
203 return 0;
205 else
207 close (sock);
208 return -1;