[821] | 1 | /* Copyright (C) 2003 Manuel Novoa III
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| 2 | *
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| 3 | * Licensed under GPL v2, or later. See file LICENSE in this tarball.
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| 4 | */
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| 5 |
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| 6 | /* Nov 6, 2003 Initial version.
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| 7 | *
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| 8 | * NOTE: This implementation is quite strict about requiring all
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| 9 | * field seperators. It also does not allow leading whitespace
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| 10 | * except when processing the numeric fields. glibc is more
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| 11 | * lenient. See the various glibc difference comments below.
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| 12 | *
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| 13 | * TODO:
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| 14 | * Move to dynamic allocation of (currently statically allocated)
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| 15 | * buffers; especially for the group-related functions since
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| 16 | * large group member lists will cause error returns.
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| 17 | *
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| 18 | */
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| 19 |
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| 20 | #include "libbb.h"
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| 21 | #include <features.h>
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| 22 | #include <stdio.h>
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| 23 | #include <stdlib.h>
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| 24 | #include <stdint.h>
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| 25 | #include <string.h>
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| 26 | #include <stddef.h>
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| 27 | #include <errno.h>
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| 28 | #include <assert.h>
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| 29 | #include <ctype.h>
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| 30 |
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| 31 | #include "shadow_.h"
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| 32 |
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| 33 | #ifndef _PATH_SHADOW
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| 34 | #define _PATH_SHADOW "/etc/shadow"
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| 35 | #endif
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| 36 | #ifndef _PATH_PASSWD
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| 37 | #define _PATH_PASSWD "/etc/passwd"
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| 38 | #endif
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| 39 | #ifndef _PATH_GROUP
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| 40 | #define _PATH_GROUP "/etc/group"
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| 41 | #endif
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| 42 |
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| 43 | /**********************************************************************/
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| 44 | /* Sizes for statically allocated buffers. */
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| 45 |
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| 46 | /* If you change these values, also change _SC_GETPW_R_SIZE_MAX and
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| 47 | * _SC_GETGR_R_SIZE_MAX in libc/unistd/sysconf.c to match */
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| 48 | #define PWD_BUFFER_SIZE 256
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| 49 | #define GRP_BUFFER_SIZE 256
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| 50 |
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| 51 | /**********************************************************************/
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| 52 | /* Prototypes for internal functions. */
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| 53 |
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| 54 | extern int __parsepwent(void *pw, char *line);
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| 55 | extern int __parsegrent(void *gr, char *line);
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| 56 | extern int __parsespent(void *sp, char *line);
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| 57 |
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| 58 | extern int __pgsreader(int (*__parserfunc)(void *d, char *line), void *data,
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| 59 | char *__restrict line_buff, size_t buflen, FILE *f);
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| 60 |
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| 61 | /**********************************************************************/
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| 62 | /* For the various fget??ent_r funcs, return
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| 63 | *
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| 64 | * 0: success
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| 65 | * ENOENT: end-of-file encountered
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| 66 | * ERANGE: buflen too small
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| 67 | * other error values possible. See __pgsreader.
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| 68 | *
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| 69 | * Also, *result == resultbuf on success and NULL on failure.
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| 70 | *
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| 71 | * NOTE: glibc difference - For the ENOENT case, glibc also sets errno.
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| 72 | * We do not, as it really isn't an error if we reach the end-of-file.
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| 73 | * Doing so is analogous to having fgetc() set errno on EOF.
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| 74 | */
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| 75 | /**********************************************************************/
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| 76 |
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| 77 | #ifdef L_fgetpwent_r
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| 78 |
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| 79 | int fgetpwent_r(FILE *__restrict stream, struct passwd *__restrict resultbuf,
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| 80 | char *__restrict buffer, size_t buflen,
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| 81 | struct passwd **__restrict result)
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| 82 | {
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| 83 | int rv;
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| 84 |
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| 85 | *result = NULL;
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| 86 |
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| 87 | if (!(rv = __pgsreader(__parsepwent, resultbuf, buffer, buflen, stream))) {
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| 88 | *result = resultbuf;
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| 89 | }
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| 90 |
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| 91 | return rv;
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| 92 | }
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| 93 |
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| 94 | #endif
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| 95 | /**********************************************************************/
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| 96 | #ifdef L_fgetgrent_r
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| 97 |
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| 98 | int fgetgrent_r(FILE *__restrict stream, struct group *__restrict resultbuf,
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| 99 | char *__restrict buffer, size_t buflen,
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| 100 | struct group **__restrict result)
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| 101 | {
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| 102 | int rv;
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| 103 |
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| 104 | *result = NULL;
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| 105 |
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| 106 | if (!(rv = __pgsreader(__parsegrent, resultbuf, buffer, buflen, stream))) {
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| 107 | *result = resultbuf;
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| 108 | }
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| 109 |
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| 110 | return rv;
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| 111 | }
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| 112 |
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| 113 | #endif
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| 114 | /**********************************************************************/
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| 115 | #ifdef L_fgetspent_r
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| 116 |
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| 117 | int fgetspent_r(FILE *__restrict stream, struct spwd *__restrict resultbuf,
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| 118 | char *__restrict buffer, size_t buflen,
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| 119 | struct spwd **__restrict result)
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| 120 | {
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| 121 | int rv;
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| 122 |
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| 123 | *result = NULL;
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| 124 |
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| 125 | if (!(rv = __pgsreader(__parsespent, resultbuf, buffer, buflen, stream))) {
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| 126 | *result = resultbuf;
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| 127 | }
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| 128 |
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| 129 | return rv;
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| 130 | }
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| 131 |
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| 132 | #endif
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| 133 | /**********************************************************************/
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| 134 | /* For the various fget??ent funcs, return NULL on failure and a
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| 135 | * pointer to the appropriate struct (statically allocated) on success.
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| 136 | */
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| 137 | /**********************************************************************/
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| 138 | #ifdef L_fgetpwent
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| 139 |
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| 140 | struct passwd *fgetpwent(FILE *stream)
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| 141 | {
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| 142 | static char buffer[PWD_BUFFER_SIZE];
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| 143 | static struct passwd resultbuf;
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| 144 | struct passwd *result;
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| 145 |
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| 146 | fgetpwent_r(stream, &resultbuf, buffer, sizeof(buffer), &result);
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| 147 | return result;
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| 148 | }
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| 149 |
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| 150 | #endif
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| 151 | /**********************************************************************/
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| 152 | #ifdef L_fgetgrent
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| 153 |
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| 154 | struct group *fgetgrent(FILE *stream)
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| 155 | {
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| 156 | static char buffer[GRP_BUFFER_SIZE];
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| 157 | static struct group resultbuf;
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| 158 | struct group *result;
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| 159 |
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| 160 | fgetgrent_r(stream, &resultbuf, buffer, sizeof(buffer), &result);
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| 161 | return result;
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| 162 | }
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| 163 |
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| 164 | #endif
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| 165 | /**********************************************************************/
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| 166 | #ifdef L_fgetspent
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| 167 |
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| 168 | extern int fgetspent_r(FILE *__restrict stream, struct spwd *__restrict resultbuf,
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| 169 | char *__restrict buffer, size_t buflen,
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| 170 | struct spwd **__restrict result);
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| 171 | struct spwd *fgetspent(FILE *stream)
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| 172 | {
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| 173 | static char buffer[PWD_BUFFER_SIZE];
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| 174 | static struct spwd resultbuf;
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| 175 | struct spwd *result;
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| 176 |
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| 177 | fgetspent_r(stream, &resultbuf, buffer, sizeof(buffer), &result);
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| 178 | return result;
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| 179 | }
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| 180 |
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| 181 | #endif
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| 182 | /**********************************************************************/
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| 183 | #ifdef L_sgetspent_r
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| 184 |
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| 185 | int sgetspent_r(const char *string, struct spwd *result_buf,
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| 186 | char *buffer, size_t buflen, struct spwd **result)
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| 187 | {
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| 188 | int rv = ERANGE;
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| 189 |
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| 190 | *result = NULL;
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| 191 |
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| 192 | if (buflen < PWD_BUFFER_SIZE) {
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| 193 | DO_ERANGE:
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| 194 | errno=rv;
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| 195 | goto DONE;
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| 196 | }
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| 197 |
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| 198 | if (string != buffer) {
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| 199 | if (strlen(string) >= buflen) {
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| 200 | goto DO_ERANGE;
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| 201 | }
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| 202 | strcpy(buffer, string);
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| 203 | }
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| 204 |
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| 205 | if (!(rv = __parsespent(result_buf, buffer))) {
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| 206 | *result = result_buf;
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| 207 | }
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| 208 |
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| 209 | DONE:
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| 210 | return rv;
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| 211 | }
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| 212 |
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| 213 | #endif
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| 214 | /**********************************************************************/
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| 215 |
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| 216 | #ifdef GETXXKEY_R_FUNC
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| 217 | #error GETXXKEY_R_FUNC is already defined!
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| 218 | #endif
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| 219 |
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| 220 | #ifdef L_getpwnam_r
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| 221 | #define GETXXKEY_R_FUNC getpwnam_r
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| 222 | #define GETXXKEY_R_PARSER __parsepwent
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| 223 | #define GETXXKEY_R_ENTTYPE struct passwd
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| 224 | #define GETXXKEY_R_TEST(ENT) (!strcmp((ENT)->pw_name, key))
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| 225 | #define DO_GETXXKEY_R_KEYTYPE const char *__restrict
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| 226 | #define DO_GETXXKEY_R_PATHNAME _PATH_PASSWD
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| 227 | #include "pwd_grp_internal.c"
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| 228 | #endif
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| 229 |
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| 230 | #ifdef L_getgrnam_r
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| 231 | #define GETXXKEY_R_FUNC getgrnam_r
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| 232 | #define GETXXKEY_R_PARSER __parsegrent
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| 233 | #define GETXXKEY_R_ENTTYPE struct group
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| 234 | #define GETXXKEY_R_TEST(ENT) (!strcmp((ENT)->gr_name, key))
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| 235 | #define DO_GETXXKEY_R_KEYTYPE const char *__restrict
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| 236 | #define DO_GETXXKEY_R_PATHNAME _PATH_GROUP
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| 237 | #include "pwd_grp_internal.c"
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| 238 | #endif
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| 239 |
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| 240 | #ifdef L_getspnam_r
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| 241 | #define GETXXKEY_R_FUNC getspnam_r
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| 242 | #define GETXXKEY_R_PARSER __parsespent
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| 243 | #define GETXXKEY_R_ENTTYPE struct spwd
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| 244 | #define GETXXKEY_R_TEST(ENT) (!strcmp((ENT)->sp_namp, key))
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| 245 | #define DO_GETXXKEY_R_KEYTYPE const char *__restrict
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| 246 | #define DO_GETXXKEY_R_PATHNAME _PATH_SHADOW
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| 247 | #include "pwd_grp_internal.c"
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| 248 | #endif
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| 249 |
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| 250 | #ifdef L_getpwuid_r
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| 251 | #define GETXXKEY_R_FUNC getpwuid_r
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| 252 | #define GETXXKEY_R_PARSER __parsepwent
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| 253 | #define GETXXKEY_R_ENTTYPE struct passwd
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| 254 | #define GETXXKEY_R_TEST(ENT) ((ENT)->pw_uid == key)
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| 255 | #define DO_GETXXKEY_R_KEYTYPE uid_t
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| 256 | #define DO_GETXXKEY_R_PATHNAME _PATH_PASSWD
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| 257 | #include "pwd_grp_internal.c"
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| 258 | #endif
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| 259 |
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| 260 | #ifdef L_getgrgid_r
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| 261 | #define GETXXKEY_R_FUNC getgrgid_r
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| 262 | #define GETXXKEY_R_PARSER __parsegrent
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| 263 | #define GETXXKEY_R_ENTTYPE struct group
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| 264 | #define GETXXKEY_R_TEST(ENT) ((ENT)->gr_gid == key)
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| 265 | #define DO_GETXXKEY_R_KEYTYPE gid_t
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| 266 | #define DO_GETXXKEY_R_PATHNAME _PATH_GROUP
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| 267 | #include "pwd_grp_internal.c"
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| 268 | #endif
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| 269 |
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| 270 | /**********************************************************************/
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| 271 | #ifdef L_getpwuid
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| 272 |
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| 273 | struct passwd *getpwuid(uid_t uid)
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| 274 | {
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| 275 | static char buffer[PWD_BUFFER_SIZE];
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| 276 | static struct passwd resultbuf;
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| 277 | struct passwd *result;
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| 278 |
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| 279 | getpwuid_r(uid, &resultbuf, buffer, sizeof(buffer), &result);
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| 280 | return result;
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| 281 | }
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| 282 |
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| 283 | #endif
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| 284 | /**********************************************************************/
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| 285 | #ifdef L_getgrgid
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| 286 |
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| 287 | struct group *getgrgid(gid_t gid)
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| 288 | {
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| 289 | static char buffer[GRP_BUFFER_SIZE];
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| 290 | static struct group resultbuf;
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| 291 | struct group *result;
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| 292 |
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| 293 | getgrgid_r(gid, &resultbuf, buffer, sizeof(buffer), &result);
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| 294 | return result;
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| 295 | }
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| 296 |
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| 297 | #endif
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| 298 | /**********************************************************************/
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| 299 | #ifdef L_getspuid_r
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| 300 |
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| 301 | /* This function is non-standard and is currently not built. It seems
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| 302 | * to have been created as a reentrant version of the non-standard
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| 303 | * functions getspuid. Why getspuid was added, I do not know. */
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| 304 |
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| 305 | int getspuid_r(uid_t uid, struct spwd *__restrict resultbuf,
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| 306 | char *__restrict buffer, size_t buflen,
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| 307 | struct spwd **__restrict result)
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| 308 | {
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| 309 | int rv;
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| 310 | struct passwd *pp;
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| 311 | struct passwd password;
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| 312 | char pwd_buff[PWD_BUFFER_SIZE];
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| 313 |
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| 314 | *result = NULL;
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| 315 | if (!(rv = getpwuid_r(uid, &password, pwd_buff, sizeof(pwd_buff), &pp))) {
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| 316 | rv = getspnam_r(password.pw_name, resultbuf, buffer, buflen, result);
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| 317 | }
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| 318 |
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| 319 | return rv;
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| 320 | }
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| 321 |
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| 322 | #endif
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| 323 | /**********************************************************************/
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| 324 | #ifdef L_getspuid
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| 325 |
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| 326 | /* This function is non-standard and is currently not built.
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| 327 | * Why it was added, I do not know. */
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| 328 |
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| 329 | struct spwd *getspuid(uid_t uid)
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| 330 | {
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| 331 | static char buffer[PWD_BUFFER_SIZE];
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| 332 | static struct spwd resultbuf;
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| 333 | struct spwd *result;
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| 334 |
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| 335 | getspuid_r(uid, &resultbuf, buffer, sizeof(buffer), &result);
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| 336 | return result;
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| 337 | }
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| 338 |
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| 339 | #endif
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| 340 | /**********************************************************************/
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| 341 | #ifdef L_getpwnam
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| 342 |
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| 343 | struct passwd *getpwnam(const char *name)
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| 344 | {
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| 345 | static char buffer[PWD_BUFFER_SIZE];
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| 346 | static struct passwd resultbuf;
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| 347 | struct passwd *result;
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| 348 |
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| 349 | getpwnam_r(name, &resultbuf, buffer, sizeof(buffer), &result);
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| 350 | return result;
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| 351 | }
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| 352 |
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| 353 | #endif
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| 354 | /**********************************************************************/
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| 355 | #ifdef L_getgrnam
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| 356 |
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| 357 | struct group *getgrnam(const char *name)
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| 358 | {
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| 359 | static char buffer[GRP_BUFFER_SIZE];
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| 360 | static struct group resultbuf;
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| 361 | struct group *result;
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| 362 |
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| 363 | getgrnam_r(name, &resultbuf, buffer, sizeof(buffer), &result);
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| 364 | return result;
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| 365 | }
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| 366 |
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| 367 | #endif
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| 368 | /**********************************************************************/
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| 369 | #ifdef L_getspnam
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| 370 |
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| 371 | struct spwd *getspnam(const char *name)
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| 372 | {
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| 373 | static char buffer[PWD_BUFFER_SIZE];
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| 374 | static struct spwd resultbuf;
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| 375 | struct spwd *result;
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| 376 |
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| 377 | getspnam_r(name, &resultbuf, buffer, sizeof(buffer), &result);
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| 378 | return result;
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| 379 | }
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| 380 |
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| 381 | #endif
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| 382 | /**********************************************************************/
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| 383 | #ifdef L_getpw
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| 384 |
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| 385 | int getpw(uid_t uid, char *buf)
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| 386 | {
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| 387 | struct passwd resultbuf;
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| 388 | struct passwd *result;
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| 389 | char buffer[PWD_BUFFER_SIZE];
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| 390 |
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| 391 | if (!buf) {
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| 392 | errno=EINVAL;
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| 393 | } else if (!getpwuid_r(uid, &resultbuf, buffer, sizeof(buffer), &result)) {
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| 394 | if (sprintf(buf, "%s:%s:%lu:%lu:%s:%s:%s\n",
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| 395 | resultbuf.pw_name, resultbuf.pw_passwd,
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| 396 | (unsigned long)(resultbuf.pw_uid),
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| 397 | (unsigned long)(resultbuf.pw_gid),
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| 398 | resultbuf.pw_gecos, resultbuf.pw_dir,
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| 399 | resultbuf.pw_shell) >= 0
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| 400 | ) {
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| 401 | return 0;
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| 402 | }
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| 403 | }
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| 404 |
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| 405 | return -1;
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| 406 | }
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| 407 |
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| 408 | #endif
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| 409 | /**********************************************************************/
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| 410 |
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| 411 | #if defined(L_getpwent_r) || defined(L_getgrent_r) || defined(L_getspent_r)
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| 412 | #if defined CONFIG_USE_BB_THREADSAFE_SHADOW && defined PTHREAD_MUTEX_INITIALIZER
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| 413 | static pthread_mutex_t mylock = PTHREAD_MUTEX_INITIALIZER;
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| 414 | # define LOCK pthread_mutex_lock(&mylock)
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| 415 | # define UNLOCK pthread_mutex_unlock(&mylock);
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| 416 | #else
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| 417 | # define LOCK ((void) 0)
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| 418 | # define UNLOCK ((void) 0)
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| 419 | #endif
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| 420 | #endif
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| 421 |
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| 422 | #ifdef L_getpwent_r
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| 423 | static FILE *pwf /*= NULL*/;
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| 424 | void setpwent(void)
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| 425 | {
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| 426 | LOCK;
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| 427 | if (pwf) {
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| 428 | rewind(pwf);
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| 429 | }
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| 430 | UNLOCK;
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| 431 | }
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| 432 |
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| 433 | void endpwent(void)
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| 434 | {
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| 435 | LOCK;
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| 436 | if (pwf) {
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| 437 | fclose(pwf);
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| 438 | pwf = NULL;
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| 439 | }
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| 440 | UNLOCK;
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| 441 | }
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| 442 |
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| 443 |
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| 444 | int getpwent_r(struct passwd *__restrict resultbuf,
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| 445 | char *__restrict buffer, size_t buflen,
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| 446 | struct passwd **__restrict result)
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| 447 | {
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| 448 | int rv;
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| 449 |
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| 450 | LOCK;
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| 451 | *result = NULL; /* In case of error... */
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| 452 |
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| 453 | if (!pwf) {
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---|
| 454 | if (!(pwf = fopen(_PATH_PASSWD, "r"))) {
|
---|
| 455 | rv = errno;
|
---|
| 456 | goto ERR;
|
---|
| 457 | }
|
---|
| 458 | }
|
---|
| 459 |
|
---|
| 460 | if (!(rv = __pgsreader(__parsepwent, resultbuf,
|
---|
| 461 | buffer, buflen, pwf))) {
|
---|
| 462 | *result = resultbuf;
|
---|
| 463 | }
|
---|
| 464 |
|
---|
| 465 | ERR:
|
---|
| 466 | UNLOCK;
|
---|
| 467 | return rv;
|
---|
| 468 | }
|
---|
| 469 |
|
---|
| 470 | #endif
|
---|
| 471 | /**********************************************************************/
|
---|
| 472 | #ifdef L_getgrent_r
|
---|
| 473 |
|
---|
| 474 | static FILE *grf /*= NULL*/;
|
---|
| 475 | void setgrent(void)
|
---|
| 476 | {
|
---|
| 477 | LOCK;
|
---|
| 478 | if (grf) {
|
---|
| 479 | rewind(grf);
|
---|
| 480 | }
|
---|
| 481 | UNLOCK;
|
---|
| 482 | }
|
---|
| 483 |
|
---|
| 484 | void endgrent(void)
|
---|
| 485 | {
|
---|
| 486 | LOCK;
|
---|
| 487 | if (grf) {
|
---|
| 488 | fclose(grf);
|
---|
| 489 | grf = NULL;
|
---|
| 490 | }
|
---|
| 491 | UNLOCK;
|
---|
| 492 | }
|
---|
| 493 |
|
---|
| 494 | int getgrent_r(struct group *__restrict resultbuf,
|
---|
| 495 | char *__restrict buffer, size_t buflen,
|
---|
| 496 | struct group **__restrict result)
|
---|
| 497 | {
|
---|
| 498 | int rv;
|
---|
| 499 |
|
---|
| 500 | LOCK;
|
---|
| 501 | *result = NULL; /* In case of error... */
|
---|
| 502 |
|
---|
| 503 | if (!grf) {
|
---|
| 504 | if (!(grf = fopen(_PATH_GROUP, "r"))) {
|
---|
| 505 | rv = errno;
|
---|
| 506 | goto ERR;
|
---|
| 507 | }
|
---|
| 508 | }
|
---|
| 509 |
|
---|
| 510 | if (!(rv = __pgsreader(__parsegrent, resultbuf,
|
---|
| 511 | buffer, buflen, grf))) {
|
---|
| 512 | *result = resultbuf;
|
---|
| 513 | }
|
---|
| 514 |
|
---|
| 515 | ERR:
|
---|
| 516 | UNLOCK;
|
---|
| 517 | return rv;
|
---|
| 518 | }
|
---|
| 519 |
|
---|
| 520 | #endif
|
---|
| 521 | /**********************************************************************/
|
---|
| 522 | #ifdef L_getspent_r
|
---|
| 523 |
|
---|
| 524 | static FILE *spf /*= NULL*/;
|
---|
| 525 | void setspent(void)
|
---|
| 526 | {
|
---|
| 527 | LOCK;
|
---|
| 528 | if (spf) {
|
---|
| 529 | rewind(spf);
|
---|
| 530 | }
|
---|
| 531 | UNLOCK;
|
---|
| 532 | }
|
---|
| 533 |
|
---|
| 534 | void endspent(void)
|
---|
| 535 | {
|
---|
| 536 | LOCK;
|
---|
| 537 | if (spf) {
|
---|
| 538 | fclose(spf);
|
---|
| 539 | spf = NULL;
|
---|
| 540 | }
|
---|
| 541 | UNLOCK;
|
---|
| 542 | }
|
---|
| 543 |
|
---|
| 544 | int getspent_r(struct spwd *resultbuf, char *buffer,
|
---|
| 545 | size_t buflen, struct spwd **result)
|
---|
| 546 | {
|
---|
| 547 | int rv;
|
---|
| 548 |
|
---|
| 549 | LOCK;
|
---|
| 550 | *result = NULL; /* In case of error... */
|
---|
| 551 |
|
---|
| 552 | if (!spf) {
|
---|
| 553 | if (!(spf = fopen(_PATH_SHADOW, "r"))) {
|
---|
| 554 | rv = errno;
|
---|
| 555 | goto ERR;
|
---|
| 556 | }
|
---|
| 557 | }
|
---|
| 558 |
|
---|
| 559 | if (!(rv = __pgsreader(__parsespent, resultbuf,
|
---|
| 560 | buffer, buflen, spf))) {
|
---|
| 561 | *result = resultbuf;
|
---|
| 562 | }
|
---|
| 563 |
|
---|
| 564 | ERR:
|
---|
| 565 | UNLOCK;
|
---|
| 566 | return rv;
|
---|
| 567 | }
|
---|
| 568 |
|
---|
| 569 | #endif
|
---|
| 570 | /**********************************************************************/
|
---|
| 571 | #ifdef L_getpwent
|
---|
| 572 |
|
---|
| 573 | struct passwd *getpwent(void)
|
---|
| 574 | {
|
---|
| 575 | static char line_buff[PWD_BUFFER_SIZE];
|
---|
| 576 | static struct passwd pwd;
|
---|
| 577 | struct passwd *result;
|
---|
| 578 |
|
---|
| 579 | getpwent_r(&pwd, line_buff, sizeof(line_buff), &result);
|
---|
| 580 | return result;
|
---|
| 581 | }
|
---|
| 582 |
|
---|
| 583 | #endif
|
---|
| 584 | /**********************************************************************/
|
---|
| 585 | #ifdef L_getgrent
|
---|
| 586 |
|
---|
| 587 | struct group *getgrent(void)
|
---|
| 588 | {
|
---|
| 589 | static char line_buff[GRP_BUFFER_SIZE];
|
---|
| 590 | static struct group gr;
|
---|
| 591 | struct group *result;
|
---|
| 592 |
|
---|
| 593 | getgrent_r(&gr, line_buff, sizeof(line_buff), &result);
|
---|
| 594 | return result;
|
---|
| 595 | }
|
---|
| 596 |
|
---|
| 597 | #endif
|
---|
| 598 | /**********************************************************************/
|
---|
| 599 | #ifdef L_getspent
|
---|
| 600 |
|
---|
| 601 | struct spwd *getspent(void)
|
---|
| 602 | {
|
---|
| 603 | static char line_buff[PWD_BUFFER_SIZE];
|
---|
| 604 | static struct spwd spwd;
|
---|
| 605 | struct spwd *result;
|
---|
| 606 |
|
---|
| 607 | getspent_r(&spwd, line_buff, sizeof(line_buff), &result);
|
---|
| 608 | return result;
|
---|
| 609 | }
|
---|
| 610 |
|
---|
| 611 | #endif
|
---|
| 612 | /**********************************************************************/
|
---|
| 613 | #ifdef L_sgetspent
|
---|
| 614 |
|
---|
| 615 | struct spwd *sgetspent(const char *string)
|
---|
| 616 | {
|
---|
| 617 | static char line_buff[PWD_BUFFER_SIZE];
|
---|
| 618 | static struct spwd spwd;
|
---|
| 619 | struct spwd *result;
|
---|
| 620 |
|
---|
| 621 | sgetspent_r(string, &spwd, line_buff, sizeof(line_buff), &result);
|
---|
| 622 | return result;
|
---|
| 623 | }
|
---|
| 624 |
|
---|
| 625 | #endif
|
---|
| 626 | /**********************************************************************/
|
---|
| 627 | #ifdef L_initgroups
|
---|
| 628 |
|
---|
| 629 | int initgroups(const char *user, gid_t gid)
|
---|
| 630 | {
|
---|
| 631 | FILE *grfile;
|
---|
| 632 | gid_t *group_list;
|
---|
| 633 | int num_groups, rv;
|
---|
| 634 | char **m;
|
---|
| 635 | struct group group;
|
---|
| 636 | char buff[PWD_BUFFER_SIZE];
|
---|
| 637 |
|
---|
| 638 | rv = -1;
|
---|
| 639 |
|
---|
| 640 | /* We alloc space for 8 gids at a time. */
|
---|
| 641 | if (((group_list = (gid_t *) malloc(8*sizeof(gid_t *))) != NULL)
|
---|
| 642 | && ((grfile = fopen(_PATH_GROUP, "r")) != NULL)
|
---|
| 643 | ) {
|
---|
| 644 |
|
---|
| 645 | *group_list = gid;
|
---|
| 646 | num_groups = 1;
|
---|
| 647 |
|
---|
| 648 | while (!__pgsreader(__parsegrent, &group, buff, sizeof(buff), grfile)) {
|
---|
| 649 | assert(group.gr_mem); /* Must have at least a NULL terminator. */
|
---|
| 650 | if (group.gr_gid != gid) {
|
---|
| 651 | for (m=group.gr_mem ; *m ; m++) {
|
---|
| 652 | if (!strcmp(*m, user)) {
|
---|
| 653 | if (!(num_groups & 7)) {
|
---|
| 654 | gid_t *tmp = (gid_t *)
|
---|
| 655 | realloc(group_list,
|
---|
| 656 | (num_groups+8) * sizeof(gid_t *));
|
---|
| 657 | if (!tmp) {
|
---|
| 658 | rv = -1;
|
---|
| 659 | goto DO_CLOSE;
|
---|
| 660 | }
|
---|
| 661 | group_list = tmp;
|
---|
| 662 | }
|
---|
| 663 | group_list[num_groups++] = group.gr_gid;
|
---|
| 664 | break;
|
---|
| 665 | }
|
---|
| 666 | }
|
---|
| 667 | }
|
---|
| 668 | }
|
---|
| 669 |
|
---|
| 670 | rv = setgroups(num_groups, group_list);
|
---|
| 671 | DO_CLOSE:
|
---|
| 672 | fclose(grfile);
|
---|
| 673 | }
|
---|
| 674 |
|
---|
| 675 | /* group_list will be NULL if initial malloc failed, which may trigger
|
---|
| 676 | * warnings from various malloc debuggers. */
|
---|
| 677 | free(group_list);
|
---|
| 678 | return rv;
|
---|
| 679 | }
|
---|
| 680 |
|
---|
| 681 | #endif
|
---|
| 682 | /**********************************************************************/
|
---|
| 683 | #ifdef L_putpwent
|
---|
| 684 |
|
---|
| 685 | int putpwent(const struct passwd *__restrict p, FILE *__restrict f)
|
---|
| 686 | {
|
---|
| 687 | int rv = -1;
|
---|
| 688 |
|
---|
| 689 | if (!p || !f) {
|
---|
| 690 | errno=EINVAL;
|
---|
| 691 | } else {
|
---|
| 692 | /* No extra thread locking is needed above what fprintf does. */
|
---|
| 693 | if (fprintf(f, "%s:%s:%lu:%lu:%s:%s:%s\n",
|
---|
| 694 | p->pw_name, p->pw_passwd,
|
---|
| 695 | (unsigned long)(p->pw_uid),
|
---|
| 696 | (unsigned long)(p->pw_gid),
|
---|
| 697 | p->pw_gecos, p->pw_dir, p->pw_shell) >= 0
|
---|
| 698 | ) {
|
---|
| 699 | rv = 0;
|
---|
| 700 | }
|
---|
| 701 | }
|
---|
| 702 |
|
---|
| 703 | return rv;
|
---|
| 704 | }
|
---|
| 705 |
|
---|
| 706 | #endif
|
---|
| 707 | /**********************************************************************/
|
---|
| 708 | #ifdef L_putgrent
|
---|
| 709 |
|
---|
| 710 | int putgrent(const struct group *__restrict p, FILE *__restrict f)
|
---|
| 711 | {
|
---|
| 712 | static const char format[] = ",%s";
|
---|
| 713 | char **m;
|
---|
| 714 | const char *fmt;
|
---|
| 715 | int rv = -1;
|
---|
| 716 |
|
---|
| 717 | if (!p || !f) { /* Sigh... glibc checks. */
|
---|
| 718 | errno=EINVAL;
|
---|
| 719 | } else {
|
---|
| 720 | if (fprintf(f, "%s:%s:%lu:",
|
---|
| 721 | p->gr_name, p->gr_passwd,
|
---|
| 722 | (unsigned long)(p->gr_gid)) >= 0
|
---|
| 723 | ) {
|
---|
| 724 |
|
---|
| 725 | fmt = format + 1;
|
---|
| 726 |
|
---|
| 727 | assert(p->gr_mem);
|
---|
| 728 | m = p->gr_mem;
|
---|
| 729 |
|
---|
| 730 | do {
|
---|
| 731 | if (!*m) {
|
---|
| 732 | if (fputc('\n', f) >= 0) {
|
---|
| 733 | rv = 0;
|
---|
| 734 | }
|
---|
| 735 | break;
|
---|
| 736 | }
|
---|
| 737 | if (fprintf(f, fmt, *m) < 0) {
|
---|
| 738 | break;
|
---|
| 739 | }
|
---|
| 740 | ++m;
|
---|
| 741 | fmt = format;
|
---|
| 742 | } while (1);
|
---|
| 743 |
|
---|
| 744 | }
|
---|
| 745 |
|
---|
| 746 | }
|
---|
| 747 |
|
---|
| 748 | return rv;
|
---|
| 749 | }
|
---|
| 750 |
|
---|
| 751 | #endif
|
---|
| 752 | /**********************************************************************/
|
---|
| 753 | #ifdef L_putspent
|
---|
| 754 |
|
---|
| 755 | static const unsigned char _sp_off[] = {
|
---|
| 756 | offsetof(struct spwd, sp_lstchg), /* 2 - not a char ptr */
|
---|
| 757 | offsetof(struct spwd, sp_min), /* 3 - not a char ptr */
|
---|
| 758 | offsetof(struct spwd, sp_max), /* 4 - not a char ptr */
|
---|
| 759 | offsetof(struct spwd, sp_warn), /* 5 - not a char ptr */
|
---|
| 760 | offsetof(struct spwd, sp_inact), /* 6 - not a char ptr */
|
---|
| 761 | offsetof(struct spwd, sp_expire), /* 7 - not a char ptr */
|
---|
| 762 | };
|
---|
| 763 |
|
---|
| 764 | int putspent(const struct spwd *p, FILE *stream)
|
---|
| 765 | {
|
---|
| 766 | static const char ld_format[] = "%ld:";
|
---|
| 767 | const char *f;
|
---|
| 768 | long int x;
|
---|
| 769 | int i;
|
---|
| 770 | int rv = -1;
|
---|
| 771 |
|
---|
| 772 | /* Unlike putpwent and putgrent, glibc does not check the args. */
|
---|
| 773 | if (fprintf(stream, "%s:%s:", p->sp_namp,
|
---|
| 774 | (p->sp_pwdp ? p->sp_pwdp : "")) < 0
|
---|
| 775 | ) {
|
---|
| 776 | goto DO_UNLOCK;
|
---|
| 777 | }
|
---|
| 778 |
|
---|
| 779 | for (i=0 ; i < sizeof(_sp_off) ; i++) {
|
---|
| 780 | f = ld_format;
|
---|
| 781 | if ((x = *(const long int *)(((const char *) p) + _sp_off[i])) == -1) {
|
---|
| 782 | f += 3;
|
---|
| 783 | }
|
---|
| 784 | if (fprintf(stream, f, x) < 0) {
|
---|
| 785 | goto DO_UNLOCK;
|
---|
| 786 | }
|
---|
| 787 | }
|
---|
| 788 |
|
---|
| 789 | if ((p->sp_flag != ~0UL) && (fprintf(stream, "%lu", p->sp_flag) < 0)) {
|
---|
| 790 | goto DO_UNLOCK;
|
---|
| 791 | }
|
---|
| 792 |
|
---|
| 793 | if (fputc('\n', stream) > 0) {
|
---|
| 794 | rv = 0;
|
---|
| 795 | }
|
---|
| 796 |
|
---|
| 797 | DO_UNLOCK:
|
---|
| 798 | return rv;
|
---|
| 799 | }
|
---|
| 800 |
|
---|
| 801 | #endif
|
---|
| 802 | /**********************************************************************/
|
---|
| 803 | /* Internal uClibc functions. */
|
---|
| 804 | /**********************************************************************/
|
---|
| 805 | #ifdef L___parsepwent
|
---|
| 806 |
|
---|
| 807 | static const unsigned char pw_off[] = {
|
---|
| 808 | offsetof(struct passwd, pw_name), /* 0 */
|
---|
| 809 | offsetof(struct passwd, pw_passwd), /* 1 */
|
---|
| 810 | offsetof(struct passwd, pw_uid), /* 2 - not a char ptr */
|
---|
| 811 | offsetof(struct passwd, pw_gid), /* 3 - not a char ptr */
|
---|
| 812 | offsetof(struct passwd, pw_gecos), /* 4 */
|
---|
| 813 | offsetof(struct passwd, pw_dir), /* 5 */
|
---|
| 814 | offsetof(struct passwd, pw_shell) /* 6 */
|
---|
| 815 | };
|
---|
| 816 |
|
---|
| 817 | int __parsepwent(void *data, char *line)
|
---|
| 818 | {
|
---|
| 819 | char *endptr;
|
---|
| 820 | char *p;
|
---|
| 821 | int i;
|
---|
| 822 |
|
---|
| 823 | i = 0;
|
---|
| 824 | do {
|
---|
| 825 | p = ((char *) ((struct passwd *) data)) + pw_off[i];
|
---|
| 826 |
|
---|
| 827 | if ((i & 6) ^ 2) { /* i!=2 and i!=3 */
|
---|
| 828 | *((char **) p) = line;
|
---|
| 829 | if (i==6) {
|
---|
| 830 | return 0;
|
---|
| 831 | }
|
---|
| 832 | /* NOTE: glibc difference - glibc allows omission of
|
---|
| 833 | * ':' seperators after the gid field if all remaining
|
---|
| 834 | * entries are empty. We require all separators. */
|
---|
| 835 | if (!(line = strchr(line, ':'))) {
|
---|
| 836 | break;
|
---|
| 837 | }
|
---|
| 838 | } else {
|
---|
| 839 | unsigned long t = strtoul(line, &endptr, 10);
|
---|
| 840 | /* Make sure we had at least one digit, and that the
|
---|
| 841 | * failing char is the next field seperator ':'. See
|
---|
| 842 | * glibc difference note above. */
|
---|
| 843 | /* TODO: Also check for leading whitespace? */
|
---|
| 844 | if ((endptr == line) || (*endptr != ':')) {
|
---|
| 845 | break;
|
---|
| 846 | }
|
---|
| 847 | line = endptr;
|
---|
| 848 | if (i & 1) { /* i == 3 -- gid */
|
---|
| 849 | *((gid_t *) p) = t;
|
---|
| 850 | } else { /* i == 2 -- uid */
|
---|
| 851 | *((uid_t *) p) = t;
|
---|
| 852 | }
|
---|
| 853 | }
|
---|
| 854 |
|
---|
| 855 | *line++ = 0;
|
---|
| 856 | ++i;
|
---|
| 857 | } while (1);
|
---|
| 858 |
|
---|
| 859 | return -1;
|
---|
| 860 | }
|
---|
| 861 |
|
---|
| 862 | #endif
|
---|
| 863 | /**********************************************************************/
|
---|
| 864 | #ifdef L___parsegrent
|
---|
| 865 |
|
---|
| 866 | static const unsigned char gr_off[] = {
|
---|
| 867 | offsetof(struct group, gr_name), /* 0 */
|
---|
| 868 | offsetof(struct group, gr_passwd), /* 1 */
|
---|
| 869 | offsetof(struct group, gr_gid) /* 2 - not a char ptr */
|
---|
| 870 | };
|
---|
| 871 |
|
---|
| 872 | int __parsegrent(void *data, char *line)
|
---|
| 873 | {
|
---|
| 874 | char *endptr;
|
---|
| 875 | char *p;
|
---|
| 876 | int i;
|
---|
| 877 | char **members;
|
---|
| 878 | char *end_of_buf;
|
---|
| 879 |
|
---|
| 880 | end_of_buf = ((struct group *) data)->gr_name; /* Evil hack! */
|
---|
| 881 | i = 0;
|
---|
| 882 | do {
|
---|
| 883 | p = ((char *) ((struct group *) data)) + gr_off[i];
|
---|
| 884 |
|
---|
| 885 | if (i < 2) {
|
---|
| 886 | *((char **) p) = line;
|
---|
| 887 | if (!(line = strchr(line, ':'))) {
|
---|
| 888 | break;
|
---|
| 889 | }
|
---|
| 890 | *line++ = 0;
|
---|
| 891 | ++i;
|
---|
| 892 | } else {
|
---|
| 893 | *((gid_t *) p) = strtoul(line, &endptr, 10);
|
---|
| 894 |
|
---|
| 895 | /* NOTE: glibc difference - glibc allows omission of the
|
---|
| 896 | * trailing colon when there is no member list. We treat
|
---|
| 897 | * this as an error. */
|
---|
| 898 |
|
---|
| 899 | /* Make sure we had at least one digit, and that the
|
---|
| 900 | * failing char is the next field seperator ':'. See
|
---|
| 901 | * glibc difference note above. */
|
---|
| 902 | if ((endptr == line) || (*endptr != ':')) {
|
---|
| 903 | break;
|
---|
| 904 | }
|
---|
| 905 |
|
---|
| 906 | i = 1; /* Count terminating NULL ptr. */
|
---|
| 907 | p = endptr;
|
---|
| 908 |
|
---|
| 909 | if (p[1]) { /* We have a member list to process. */
|
---|
| 910 | /* Overwrite the last ':' with a ',' before counting.
|
---|
| 911 | * This allows us to test for initial ',' and adds
|
---|
| 912 | * one ',' so that the ',' count equals the member
|
---|
| 913 | * count. */
|
---|
| 914 | *p = ',';
|
---|
| 915 | do {
|
---|
| 916 | /* NOTE: glibc difference - glibc allows and trims leading
|
---|
| 917 | * (but not trailing) space. We treat this as an error. */
|
---|
| 918 | /* NOTE: glibc difference - glibc allows consecutive and
|
---|
| 919 | * trailing commas, and ignores "empty string" users. We
|
---|
| 920 | * treat this as an error. */
|
---|
| 921 | if (*p == ',') {
|
---|
| 922 | ++i;
|
---|
| 923 | *p = 0; /* nul-terminate each member string. */
|
---|
| 924 | if (!*++p || (*p == ',') || isspace(*p)) {
|
---|
| 925 | goto ERR;
|
---|
| 926 | }
|
---|
| 927 | }
|
---|
| 928 | } while (*++p);
|
---|
| 929 | }
|
---|
| 930 |
|
---|
| 931 | /* Now align (p+1), rounding up. */
|
---|
| 932 | /* Assumes sizeof(char **) is a power of 2. */
|
---|
| 933 | members = (char **)( (((intptr_t) p) + sizeof(char **))
|
---|
| 934 | & ~((intptr_t)(sizeof(char **) - 1)) );
|
---|
| 935 |
|
---|
| 936 | if (((char *)(members + i)) > end_of_buf) { /* No space. */
|
---|
| 937 | break;
|
---|
| 938 | }
|
---|
| 939 |
|
---|
| 940 | ((struct group *) data)->gr_mem = members;
|
---|
| 941 |
|
---|
| 942 | if (--i) {
|
---|
| 943 | p = endptr; /* Pointing to char prior to first member. */
|
---|
| 944 | do {
|
---|
| 945 | *members++ = ++p;
|
---|
| 946 | if (!--i) break;
|
---|
| 947 | while (*++p) {}
|
---|
| 948 | } while (1);
|
---|
| 949 | }
|
---|
| 950 | *members = NULL;
|
---|
| 951 |
|
---|
| 952 | return 0;
|
---|
| 953 | }
|
---|
| 954 | } while (1);
|
---|
| 955 |
|
---|
| 956 | ERR:
|
---|
| 957 | return -1;
|
---|
| 958 | }
|
---|
| 959 |
|
---|
| 960 | #endif
|
---|
| 961 | /**********************************************************************/
|
---|
| 962 | #ifdef L___parsespent
|
---|
| 963 |
|
---|
| 964 | static const unsigned char sp_off[] = {
|
---|
| 965 | offsetof(struct spwd, sp_namp), /* 0 */
|
---|
| 966 | offsetof(struct spwd, sp_pwdp), /* 1 */
|
---|
| 967 | offsetof(struct spwd, sp_lstchg), /* 2 - not a char ptr */
|
---|
| 968 | offsetof(struct spwd, sp_min), /* 3 - not a char ptr */
|
---|
| 969 | offsetof(struct spwd, sp_max), /* 4 - not a char ptr */
|
---|
| 970 | offsetof(struct spwd, sp_warn), /* 5 - not a char ptr */
|
---|
| 971 | offsetof(struct spwd, sp_inact), /* 6 - not a char ptr */
|
---|
| 972 | offsetof(struct spwd, sp_expire), /* 7 - not a char ptr */
|
---|
| 973 | offsetof(struct spwd, sp_flag) /* 8 - not a char ptr */
|
---|
| 974 | };
|
---|
| 975 |
|
---|
| 976 | int __parsespent(void *data, char * line)
|
---|
| 977 | {
|
---|
| 978 | char *endptr;
|
---|
| 979 | char *p;
|
---|
| 980 | int i;
|
---|
| 981 |
|
---|
| 982 | i = 0;
|
---|
| 983 | do {
|
---|
| 984 | p = ((char *) ((struct spwd *) data)) + sp_off[i];
|
---|
| 985 | if (i < 2) {
|
---|
| 986 | *((char **) p) = line;
|
---|
| 987 | if (!(line = strchr(line, ':'))) {
|
---|
| 988 | break;
|
---|
| 989 | }
|
---|
| 990 | } else {
|
---|
| 991 | #if 0
|
---|
| 992 | if (i==5) { /* Support for old format. */
|
---|
| 993 | while (isspace(*line)) ++line; /* glibc eats space here. */
|
---|
| 994 | if (!*line) {
|
---|
| 995 | ((struct spwd *) data)->sp_warn = -1;
|
---|
| 996 | ((struct spwd *) data)->sp_inact = -1;
|
---|
| 997 | ((struct spwd *) data)->sp_expire = -1;
|
---|
| 998 | ((struct spwd *) data)->sp_flag = ~0UL;
|
---|
| 999 | return 0;
|
---|
| 1000 | }
|
---|
| 1001 | }
|
---|
| 1002 | #endif
|
---|
| 1003 |
|
---|
| 1004 | *((long *) p) = (long) strtoul(line, &endptr, 10);
|
---|
| 1005 |
|
---|
| 1006 | if (endptr == line) {
|
---|
| 1007 | *((long *) p) = ((i != 8) ? -1L : ((long)(~0UL)));
|
---|
| 1008 | }
|
---|
| 1009 |
|
---|
| 1010 | line = endptr;
|
---|
| 1011 |
|
---|
| 1012 | if (i == 8) {
|
---|
| 1013 | if (!*endptr) {
|
---|
| 1014 | return 0;
|
---|
| 1015 | }
|
---|
| 1016 | break;
|
---|
| 1017 | }
|
---|
| 1018 |
|
---|
| 1019 | if (*endptr != ':') {
|
---|
| 1020 | break;
|
---|
| 1021 | }
|
---|
| 1022 |
|
---|
| 1023 | }
|
---|
| 1024 |
|
---|
| 1025 | *line++ = 0;
|
---|
| 1026 | ++i;
|
---|
| 1027 | } while (1);
|
---|
| 1028 |
|
---|
| 1029 | return EINVAL;
|
---|
| 1030 | }
|
---|
| 1031 |
|
---|
| 1032 | #endif
|
---|
| 1033 | /**********************************************************************/
|
---|
| 1034 | #ifdef L___pgsreader
|
---|
| 1035 |
|
---|
| 1036 | /* Reads until if EOF, or until if finds a line which fits in the buffer
|
---|
| 1037 | * and for which the parser function succeeds.
|
---|
| 1038 | *
|
---|
| 1039 | * Returns 0 on success and ENOENT for end-of-file (glibc concession).
|
---|
| 1040 | */
|
---|
| 1041 |
|
---|
| 1042 | int __pgsreader(int (*__parserfunc)(void *d, char *line), void *data,
|
---|
| 1043 | char *__restrict line_buff, size_t buflen, FILE *f)
|
---|
| 1044 | {
|
---|
| 1045 | int line_len;
|
---|
| 1046 | int skip;
|
---|
| 1047 | int rv = ERANGE;
|
---|
| 1048 |
|
---|
| 1049 | if (buflen < PWD_BUFFER_SIZE) {
|
---|
| 1050 | errno=rv;
|
---|
| 1051 | } else {
|
---|
| 1052 | skip = 0;
|
---|
| 1053 | do {
|
---|
| 1054 | if (!fgets(line_buff, buflen, f)) {
|
---|
| 1055 | if (feof(f)) {
|
---|
| 1056 | rv = ENOENT;
|
---|
| 1057 | }
|
---|
| 1058 | break;
|
---|
| 1059 | }
|
---|
| 1060 |
|
---|
| 1061 | line_len = strlen(line_buff) - 1; /* strlen() must be > 0. */
|
---|
| 1062 | if (line_buff[line_len] == '\n') {
|
---|
| 1063 | line_buff[line_len] = 0;
|
---|
| 1064 | } else if (line_len + 2 == buflen) { /* line too long */
|
---|
| 1065 | ++skip;
|
---|
| 1066 | continue;
|
---|
| 1067 | }
|
---|
| 1068 |
|
---|
| 1069 | if (skip) {
|
---|
| 1070 | --skip;
|
---|
| 1071 | continue;
|
---|
| 1072 | }
|
---|
| 1073 |
|
---|
| 1074 | /* NOTE: glibc difference - glibc strips leading whitespace from
|
---|
| 1075 | * records. We do not allow leading whitespace. */
|
---|
| 1076 |
|
---|
| 1077 | /* Skip empty lines, comment lines, and lines with leading
|
---|
| 1078 | * whitespace. */
|
---|
| 1079 | if (*line_buff && (*line_buff != '#') && !isspace(*line_buff)) {
|
---|
| 1080 | if (__parserfunc == __parsegrent) { /* Do evil group hack. */
|
---|
| 1081 | /* The group entry parsing function needs to know where
|
---|
| 1082 | * the end of the buffer is so that it can construct the
|
---|
| 1083 | * group member ptr table. */
|
---|
| 1084 | ((struct group *) data)->gr_name = line_buff + buflen;
|
---|
| 1085 | }
|
---|
| 1086 |
|
---|
| 1087 | if (!__parserfunc(data, line_buff)) {
|
---|
| 1088 | rv = 0;
|
---|
| 1089 | break;
|
---|
| 1090 | }
|
---|
| 1091 | }
|
---|
| 1092 | } while (1);
|
---|
| 1093 |
|
---|
| 1094 | }
|
---|
| 1095 |
|
---|
| 1096 | return rv;
|
---|
| 1097 | }
|
---|
| 1098 |
|
---|
| 1099 | #endif
|
---|
| 1100 | /**********************************************************************/
|
---|