1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
|
/* Copyright (C) 1998, 1999, 2003, 2004 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 <not-cancel.h>
#include <stdio-common/_itoa.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, struct passwd **result)
internal_function;
int
__nscd_getpwnam_r (const char *name, struct passwd *resultbuf, char *buffer,
size_t buflen, struct passwd **result)
{
if (name == NULL)
return -1;
return nscd_getpw_r (name, strlen (name) + 1, GETPWBYNAME, resultbuf,
buffer, buflen, result);
}
int
__nscd_getpwuid_r (uid_t uid, struct passwd *resultbuf, char *buffer,
size_t buflen, struct passwd **result)
{
char buf[3 * sizeof (uid_t)];
buf[sizeof (buf) - 1] = '\0';
char *cp = _itoa_word (uid, buf + sizeof (buf) - 1, 10, 0);
return nscd_getpw_r (cp, buf + sizeof (buf) - cp, GETPWBYUID, resultbuf,
buffer, buflen, result);
}
static int
internal_function
nscd_getpw_r (const char *key, size_t keylen, request_type type,
struct passwd *resultbuf, char *buffer, size_t buflen,
struct passwd **result)
{
pw_response_header pw_resp;
int sock = __nscd_open_socket (key, keylen, type, &pw_resp,
sizeof (pw_resp));
if (sock == -1)
{
__nss_not_use_nscd_passwd = 1;
return -1;
}
/* No value found so far. */
int retval = -1;
*result = NULL;
if (__builtin_expect (pw_resp.found == -1, 0))
{
/* The daemon does not cache this database. */
__nss_not_use_nscd_passwd = 1;
goto out;
}
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 (__builtin_expect (buflen < total, 0))
{
__set_errno (ERANGE);
retval = ERANGE;
goto out;
}
/* 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;
ssize_t nbytes = TEMP_FAILURE_RETRY (__read (sock, buffer, total));
if (nbytes == (ssize_t) total)
{
retval = 0;
*result = resultbuf;
}
}
else
{
/* The `errno' to some value != ERANGE. */
__set_errno (ENOENT);
/* Even though we have not found anything, the result is zero. */
retval = 0;
}
out:
close_not_cancel_no_status (sock);
return retval;
}
|
