| Bernhard Reutner-Fischer | 30c7de0 | 2005-10-28 11:21:40 +0000 | [diff] [blame] | 1 | /* Copyright (C) 2003 Manuel Novoa III |
| 2 | * |
| 3 | * Licensed under GPL v2, or later. See file LICENSE in this tarball. |
| 4 | */ |
| 5 | |
| 6 | /* Nov 6, 2003 Initial version. |
| 7 | * |
| 8 | * NOTE: This implementation is quite strict about requiring all |
| 9 | * field seperators. It also does not allow leading whitespace |
| 10 | * except when processing the numeric fields. glibc is more |
| 11 | * lenient. See the various glibc difference comments below. |
| 12 | * |
| 13 | * TODO: |
| 14 | * Move to dynamic allocation of (currently staticly allocated) |
| 15 | * buffers; especially for the group-related functions since |
| 16 | * large group member lists will cause error returns. |
| 17 | * |
| 18 | */ |
| 19 | |
| 20 | #include <features.h> |
| 21 | #include <stdio.h> |
| 22 | #include <stdlib.h> |
| 23 | #include <stdint.h> |
| 24 | #include <string.h> |
| 25 | #include <stddef.h> |
| 26 | #include <errno.h> |
| 27 | #include <assert.h> |
| 28 | #include <ctype.h> |
| 29 | #include "busybox.h" |
| 30 | #include "pwd_.h" |
| 31 | #include "grp_.h" |
| 32 | #include "shadow_.h" |
| 33 | |
| 34 | #ifndef _PATH_SHADOW |
| 35 | #define _PATH_SHADOW "/etc/shadow" |
| 36 | #endif |
| 37 | #ifndef _PATH_PASSWD |
| 38 | #define _PATH_PASSWD "/etc/passwd" |
| 39 | #endif |
| 40 | #ifndef _PATH_GROUP |
| 41 | #define _PATH_GROUP "/etc/group" |
| 42 | #endif |
| 43 | |
| 44 | /**********************************************************************/ |
| 45 | /* Sizes for staticly allocated buffers. */ |
| 46 | |
| 47 | /* If you change these values, also change _SC_GETPW_R_SIZE_MAX and |
| 48 | * _SC_GETGR_R_SIZE_MAX in libc/unistd/sysconf.c to match */ |
| 49 | #define PWD_BUFFER_SIZE 256 |
| 50 | #define GRP_BUFFER_SIZE 256 |
| 51 | |
| 52 | /**********************************************************************/ |
| 53 | /* Prototypes for internal functions. */ |
| 54 | |
| 55 | extern int __parsepwent(void *pw, char *line); |
| 56 | extern int __parsegrent(void *gr, char *line); |
| 57 | extern int __parsespent(void *sp, char *line); |
| 58 | |
| 59 | extern int __pgsreader(int (*__parserfunc)(void *d, char *line), void *data, |
| 60 | char *__restrict line_buff, size_t buflen, FILE *f); |
| 61 | |
| 62 | |
| 63 | #ifndef GETXXKEY_R_FUNC |
| 64 | #error GETXXKEY_R_FUNC is not defined! |
| 65 | #endif |
| 66 | /**********************************************************************/ |
| 67 | #ifdef GETXXKEY_R_FUNC |
| 68 | |
| 69 | int GETXXKEY_R_FUNC(DO_GETXXKEY_R_KEYTYPE key, |
| 70 | GETXXKEY_R_ENTTYPE *__restrict resultbuf, |
| 71 | char *__restrict buffer, size_t buflen, |
| 72 | GETXXKEY_R_ENTTYPE **__restrict result) |
| 73 | { |
| 74 | FILE *stream; |
| 75 | int rv; |
| 76 | |
| 77 | *result = NULL; |
| 78 | |
| 79 | if (!(stream = fopen(DO_GETXXKEY_R_PATHNAME, "r"))) { |
| 80 | rv = errno; |
| 81 | } else { |
| 82 | do { |
| 83 | if (!(rv = __pgsreader(GETXXKEY_R_PARSER, resultbuf, |
| 84 | buffer, buflen, stream)) |
| 85 | ) { |
| 86 | if (GETXXKEY_R_TEST(resultbuf)) { /* Found key? */ |
| 87 | *result = resultbuf; |
| 88 | break; |
| 89 | } |
| 90 | } else { |
| 91 | if (rv == ENOENT) { /* end-of-file encountered. */ |
| 92 | rv = 0; |
| 93 | } |
| 94 | break; |
| 95 | } |
| 96 | } while (1); |
| 97 | fclose(stream); |
| 98 | } |
| 99 | |
| 100 | return rv; |
| 101 | } |
| 102 | |
| 103 | #endif |
| 104 | /**********************************************************************/ |
| 105 | #undef GETXXKEY_R_FUNC |
| 106 | #undef GETXXKEY_R_PARSER |
| 107 | #undef GETXXKEY_R_ENTTYPE |
| 108 | #undef GETXXKEY_R_TEST |
| 109 | #undef DO_GETXXKEY_R_KEYTYPE |
| 110 | #undef DO_GETXXKEY_R_PATHNAME |
| 111 | |