1 /*
2 * Copyright (C) 2003 Manuel Novoa III <mjn3@uclibc.org>
3 * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
4 *
5 * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
6 */
7
8 /* Nov 6, 2003 Initial version.
9 *
10 * NOTE: This implementation is quite strict about requiring all
11 * field seperators. It also does not allow leading whitespace
12 * except when processing the numeric fields. glibc is more
13 * lenient. See the various glibc difference comments below.
14 *
15 * TODO:
16 * Move to dynamic allocation of (currently statically allocated)
17 * buffers; especially for the group-related functions since
18 * large group member lists will cause error returns.
19 *
20 */
21
22 #include <features.h>
23 #include <stdio.h>
24 #include <stdlib.h>
25 #include <stdint.h>
26 #include <string.h>
27 #include <stddef.h>
28 #include <errno.h>
29 #include <assert.h>
30 #include <ctype.h>
31 #include <pwd.h>
32 #include <grp.h>
33 #include <paths.h>
34 #ifdef __UCLIBC_HAS_SHADOW__
35 #include <shadow.h>
36 #endif
37
38 /**********************************************************************/
39 /* Sizes for statically allocated buffers. */
40
41 /* If you change these values, also change _SC_GETPW_R_SIZE_MAX and
42 * _SC_GETGR_R_SIZE_MAX in libc/unistd/sysconf.c to match */
43 #define PWD_BUFFER_SIZE 256
44 #define GRP_BUFFER_SIZE 256
45
46 /**********************************************************************/
47 /* Prototypes for internal functions. */
48
49 #ifndef GETXXKEY_R_FUNC
50 #error GETXXKEY_R_FUNC is not defined!
51 #endif
52 /**********************************************************************/
53 #ifdef GETXXKEY_R_FUNC
54
libc_hidden_proto(GETXXKEY_R_FUNC)55 libc_hidden_proto(GETXXKEY_R_FUNC)
56 int GETXXKEY_R_FUNC(DO_GETXXKEY_R_KEYTYPE key,
57 GETXXKEY_R_ENTTYPE *__restrict resultbuf,
58 char *__restrict buffer, size_t buflen,
59 GETXXKEY_R_ENTTYPE **__restrict result)
60 {
61 FILE *stream;
62 int rv;
63
64 *result = NULL;
65
66 if (!(stream = fopen(DO_GETXXKEY_R_PATHNAME, "r"))) {
67 rv = errno;
68 } else {
69 __STDIO_SET_USER_LOCKING(stream);
70 do {
71 if (!(rv = __pgsreader(GETXXKEY_R_PARSER, resultbuf,
72 buffer, buflen, stream))
73 ) {
74 if (GETXXKEY_R_TEST(resultbuf)) { /* Found key? */
75 *result = resultbuf;
76 break;
77 }
78 } else {
79 if (rv == ENOENT) { /* end-of-file encountered. */
80 rv = 0;
81 }
82 break;
83 }
84 } while (1);
85 fclose(stream);
86 }
87
88 return rv;
89 }
90 libc_hidden_def(GETXXKEY_R_FUNC)
91
92 #endif
93 /**********************************************************************/
94 #undef GETXXKEY_R_FUNC_HIDDEN
95 #undef GETXXKEY_R_FUNC
96 #undef GETXXKEY_R_PARSER
97 #undef GETXXKEY_R_ENTTYPE
98 #undef GETXXKEY_R_TEST
99 #undef DO_GETXXKEY_R_KEYTYPE
100 #undef DO_GETXXKEY_R_PATHNAME
101