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
|
/*
* Copyright (C) 2003 Manuel Novoa III
*
* Licensed under LGPL v2.1, see the file COPYING.LIB in this tarball for details.
*/
/* Nov 6, 2003 Initial version.
*
* NOTE: This implementation is quite strict about requiring all
* field seperators. It also does not allow leading whitespace
* except when processing the numeric fields. glibc is more
* lenient. See the various glibc difference comments below.
*
* TODO:
* Move to dynamic allocation of (currently staticly allocated)
* buffers; especially for the group-related functions since
* large group member lists will cause error returns.
*
*/
#define _GNU_SOURCE
#include <features.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <stddef.h>
#include <errno.h>
#include <assert.h>
#include <ctype.h>
#include <pwd.h>
#include <grp.h>
#include <paths.h>
#ifdef __HAS_SHADOW__
#include <shadow.h>
#endif
#ifdef __UCLIBC_HAS_THREADS__
#include <pthread.h>
#endif
/**********************************************************************/
/* Sizes for staticly allocated buffers. */
/* If you change these values, also change _SC_GETPW_R_SIZE_MAX and
* _SC_GETGR_R_SIZE_MAX in libc/unistd/sysconf.c to match */
#define PWD_BUFFER_SIZE 256
#define GRP_BUFFER_SIZE 256
/**********************************************************************/
/* Prototypes for internal functions. */
#ifndef GETXXKEY_R_FUNC
#error GETXXKEY_R_FUNC is not defined!
#endif
/**********************************************************************/
#ifdef GETXXKEY_R_FUNC
libc_hidden_proto(GETXXKEY_R_FUNC)
int GETXXKEY_R_FUNC(DO_GETXXKEY_R_KEYTYPE key,
GETXXKEY_R_ENTTYPE *__restrict resultbuf,
char *__restrict buffer, size_t buflen,
GETXXKEY_R_ENTTYPE **__restrict result)
{
FILE *stream;
int rv;
*result = NULL;
if (!(stream = fopen(DO_GETXXKEY_R_PATHNAME, "r"))) {
rv = errno;
} else {
__STDIO_SET_USER_LOCKING(stream);
do {
if (!(rv = __pgsreader(GETXXKEY_R_PARSER, resultbuf,
buffer, buflen, stream))
) {
if (GETXXKEY_R_TEST(resultbuf)) { /* Found key? */
*result = resultbuf;
break;
}
} else {
if (rv == ENOENT) { /* end-of-file encountered. */
rv = 0;
}
break;
}
} while (1);
fclose(stream);
}
return rv;
}
libc_hidden_def(GETXXKEY_R_FUNC)
#endif
/**********************************************************************/
#undef GETXXKEY_R_FUNC_HIDDEN
#undef GETXXKEY_R_FUNC
#undef GETXXKEY_R_PARSER
#undef GETXXKEY_R_ENTTYPE
#undef GETXXKEY_R_TEST
#undef DO_GETXXKEY_R_KEYTYPE
#undef DO_GETXXKEY_R_PATHNAME
|
