[3320] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /* Copyright (C) 2003 Manuel Novoa III
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| 3 | *
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| 4 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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| 5 | */
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| 6 |
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| 7 | /* Nov 6, 2003 Initial version.
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| 8 | *
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| 9 | * NOTE: This implementation is quite strict about requiring all
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| 10 | * field seperators. It also does not allow leading whitespace
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| 11 | * except when processing the numeric fields. glibc is more
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| 12 | * lenient. See the various glibc difference comments below.
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| 13 | *
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| 14 | * TODO:
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| 15 | * Move to dynamic allocation of (currently statically allocated)
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| 16 | * buffers; especially for the group-related functions since
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| 17 | * large group member lists will cause error returns.
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| 18 | */
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| 19 |
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| 20 | #include "libbb.h"
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| 21 | #include <assert.h>
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| 22 |
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| 23 | #ifndef _PATH_SHADOW
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| 24 | #define _PATH_SHADOW "/etc/shadow"
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| 25 | #endif
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| 26 | #ifndef _PATH_PASSWD
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| 27 | #define _PATH_PASSWD "/etc/passwd"
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| 28 | #endif
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| 29 | #ifndef _PATH_GROUP
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| 30 | #define _PATH_GROUP "/etc/group"
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| 31 | #endif
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| 32 |
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| 33 | /**********************************************************************/
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| 34 | /* Sizes for statically allocated buffers. */
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| 35 |
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| 36 | /* If you change these values, also change _SC_GETPW_R_SIZE_MAX and
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| 37 | * _SC_GETGR_R_SIZE_MAX in libc/unistd/sysconf.c to match */
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| 38 | #define PWD_BUFFER_SIZE 256
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| 39 | #define GRP_BUFFER_SIZE 256
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| 40 |
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| 41 | /**********************************************************************/
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| 42 | /* Prototypes for internal functions. */
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| 43 |
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| 44 | static int bb__pgsreader(
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| 45 | int FAST_FUNC (*parserfunc)(void *d, char *line),
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| 46 | void *data,
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| 47 | char *__restrict line_buff,
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| 48 | size_t buflen,
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| 49 | FILE *f);
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| 50 |
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| 51 | static int FAST_FUNC bb__parsepwent(void *pw, char *line);
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| 52 | static int FAST_FUNC bb__parsegrent(void *gr, char *line);
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| 53 | #if ENABLE_USE_BB_SHADOW
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| 54 | static int FAST_FUNC bb__parsespent(void *sp, char *line);
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| 55 | #endif
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| 56 |
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| 57 | /**********************************************************************/
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| 58 | /* We avoid having big global data. */
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| 59 |
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| 60 | struct statics {
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| 61 | /* Smaller things first */
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| 62 | struct passwd getpwuid_resultbuf;
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| 63 | struct group getgrgid_resultbuf;
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| 64 | struct passwd getpwnam_resultbuf;
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| 65 | struct group getgrnam_resultbuf;
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| 66 |
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| 67 | char getpwuid_buffer[PWD_BUFFER_SIZE];
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| 68 | char getgrgid_buffer[GRP_BUFFER_SIZE];
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| 69 | char getpwnam_buffer[PWD_BUFFER_SIZE];
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| 70 | char getgrnam_buffer[GRP_BUFFER_SIZE];
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| 71 | #if 0
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| 72 | struct passwd fgetpwent_resultbuf;
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| 73 | struct group fgetgrent_resultbuf;
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| 74 | struct spwd fgetspent_resultbuf;
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| 75 | char fgetpwent_buffer[PWD_BUFFER_SIZE];
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| 76 | char fgetgrent_buffer[GRP_BUFFER_SIZE];
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| 77 | char fgetspent_buffer[PWD_BUFFER_SIZE];
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| 78 | #endif
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| 79 | #if 0 //ENABLE_USE_BB_SHADOW
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| 80 | struct spwd getspuid_resultbuf;
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| 81 | struct spwd getspnam_resultbuf;
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| 82 | char getspuid_buffer[PWD_BUFFER_SIZE];
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| 83 | char getspnam_buffer[PWD_BUFFER_SIZE];
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| 84 | #endif
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| 85 | // Not converted - too small to bother
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| 86 | //pthread_mutex_t mylock = PTHREAD_MUTEX_INITIALIZER;
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| 87 | //FILE *pwf /*= NULL*/;
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| 88 | //FILE *grf /*= NULL*/;
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| 89 | //FILE *spf /*= NULL*/;
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| 90 | #if 0
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| 91 | struct passwd getpwent_pwd;
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| 92 | struct group getgrent_gr;
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| 93 | char getpwent_line_buff[PWD_BUFFER_SIZE];
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| 94 | char getgrent_line_buff[GRP_BUFFER_SIZE];
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| 95 | #endif
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| 96 | #if 0 //ENABLE_USE_BB_SHADOW
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| 97 | struct spwd getspent_spwd;
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| 98 | struct spwd sgetspent_spwd;
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| 99 | char getspent_line_buff[PWD_BUFFER_SIZE];
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| 100 | char sgetspent_line_buff[PWD_BUFFER_SIZE];
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| 101 | #endif
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| 102 | };
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| 103 |
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| 104 | static struct statics *ptr_to_statics;
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| 105 |
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| 106 | static struct statics *get_S(void)
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| 107 | {
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| 108 | if (!ptr_to_statics)
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| 109 | ptr_to_statics = xzalloc(sizeof(*ptr_to_statics));
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| 110 | return ptr_to_statics;
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| 111 | }
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| 112 |
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| 113 | /* Always use in this order, get_S() must be called first */
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| 114 | #define RESULTBUF(name) &((S = get_S())->name##_resultbuf)
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| 115 | #define BUFFER(name) (S->name##_buffer)
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| 116 |
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| 117 | /**********************************************************************/
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| 118 | /* For the various fget??ent_r funcs, return
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| 119 | *
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| 120 | * 0: success
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| 121 | * ENOENT: end-of-file encountered
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| 122 | * ERANGE: buflen too small
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| 123 | * other error values possible. See bb__pgsreader.
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| 124 | *
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| 125 | * Also, *result == resultbuf on success and NULL on failure.
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| 126 | *
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| 127 | * NOTE: glibc difference - For the ENOENT case, glibc also sets errno.
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| 128 | * We do not, as it really isn't an error if we reach the end-of-file.
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| 129 | * Doing so is analogous to having fgetc() set errno on EOF.
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| 130 | */
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| 131 | /**********************************************************************/
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| 132 |
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| 133 | int fgetpwent_r(FILE *__restrict stream, struct passwd *__restrict resultbuf,
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| 134 | char *__restrict buffer, size_t buflen,
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| 135 | struct passwd **__restrict result)
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| 136 | {
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| 137 | int rv;
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| 138 |
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| 139 | *result = NULL;
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| 140 |
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| 141 | rv = bb__pgsreader(bb__parsepwent, resultbuf, buffer, buflen, stream);
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| 142 | if (!rv) {
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| 143 | *result = resultbuf;
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| 144 | }
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| 145 |
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| 146 | return rv;
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| 147 | }
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| 148 |
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| 149 | int fgetgrent_r(FILE *__restrict stream, struct group *__restrict resultbuf,
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| 150 | char *__restrict buffer, size_t buflen,
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| 151 | struct group **__restrict result)
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| 152 | {
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| 153 | int rv;
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| 154 |
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| 155 | *result = NULL;
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| 156 |
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| 157 | rv = bb__pgsreader(bb__parsegrent, resultbuf, buffer, buflen, stream);
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| 158 | if (!rv) {
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| 159 | *result = resultbuf;
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| 160 | }
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| 161 |
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| 162 | return rv;
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| 163 | }
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| 164 |
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| 165 | #if ENABLE_USE_BB_SHADOW
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| 166 | #ifdef UNUSED_FOR_NOW
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| 167 | int fgetspent_r(FILE *__restrict stream, struct spwd *__restrict resultbuf,
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| 168 | char *__restrict buffer, size_t buflen,
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| 169 | struct spwd **__restrict result)
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| 170 | {
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| 171 | int rv;
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| 172 |
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| 173 | *result = NULL;
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| 174 |
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| 175 | rv = bb__pgsreader(bb__parsespent, resultbuf, buffer, buflen, stream);
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| 176 | if (!rv) {
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| 177 | *result = resultbuf;
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| 178 | }
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| 179 |
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| 180 | return rv;
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| 181 | }
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| 182 | #endif
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| 183 | #endif
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| 184 |
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| 185 | /**********************************************************************/
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| 186 | /* For the various fget??ent funcs, return NULL on failure and a
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| 187 | * pointer to the appropriate struct (statically allocated) on success.
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| 188 | * TODO: audit & stop using these in bbox, they pull in static buffers */
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| 189 | /**********************************************************************/
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| 190 |
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| 191 | #ifdef UNUSED_SINCE_WE_AVOID_STATIC_BUFS
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| 192 | struct passwd *fgetpwent(FILE *stream)
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| 193 | {
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| 194 | struct statics *S;
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| 195 | struct passwd *resultbuf = RESULTBUF(fgetpwent);
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| 196 | char *buffer = BUFFER(fgetpwent);
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| 197 | struct passwd *result;
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| 198 |
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| 199 | fgetpwent_r(stream, resultbuf, buffer, sizeof(BUFFER(fgetpwent)), &result);
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| 200 | return result;
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| 201 | }
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| 202 |
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| 203 | struct group *fgetgrent(FILE *stream)
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| 204 | {
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| 205 | struct statics *S;
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| 206 | struct group *resultbuf = RESULTBUF(fgetgrent);
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| 207 | char *buffer = BUFFER(fgetgrent);
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| 208 | struct group *result;
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| 209 |
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| 210 | fgetgrent_r(stream, resultbuf, buffer, sizeof(BUFFER(fgetgrent)), &result);
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| 211 | return result;
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| 212 | }
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| 213 | #endif
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| 214 |
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| 215 | #if ENABLE_USE_BB_SHADOW
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| 216 | #ifdef UNUSED_SINCE_WE_AVOID_STATIC_BUFS
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| 217 | struct spwd *fgetspent(FILE *stream)
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| 218 | {
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| 219 | struct statics *S;
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| 220 | struct spwd *resultbuf = RESULTBUF(fgetspent);
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| 221 | char *buffer = BUFFER(fgetspent);
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| 222 | struct spwd *result;
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| 223 |
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| 224 | fgetspent_r(stream, resultbuf, buffer, sizeof(BUFFER(fgetspent)), &result);
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| 225 | return result;
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| 226 | }
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| 227 | #endif
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| 228 |
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| 229 | #ifdef UNUSED_FOR_NOW
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| 230 | int sgetspent_r(const char *string, struct spwd *result_buf,
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| 231 | char *buffer, size_t buflen, struct spwd **result)
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| 232 | {
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| 233 | int rv = ERANGE;
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| 234 |
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| 235 | *result = NULL;
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| 236 |
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| 237 | if (buflen < PWD_BUFFER_SIZE) {
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| 238 | DO_ERANGE:
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| 239 | errno = rv;
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| 240 | goto DONE;
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| 241 | }
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| 242 |
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| 243 | if (string != buffer) {
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| 244 | if (strlen(string) >= buflen) {
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| 245 | goto DO_ERANGE;
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| 246 | }
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| 247 | strcpy(buffer, string);
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| 248 | }
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| 249 |
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| 250 | rv = bb__parsespent(result_buf, buffer);
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| 251 | if (!rv) {
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| 252 | *result = result_buf;
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| 253 | }
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| 254 |
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| 255 | DONE:
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| 256 | return rv;
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| 257 | }
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| 258 | #endif
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| 259 | #endif /* ENABLE_USE_BB_SHADOW */
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| 260 |
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| 261 | /**********************************************************************/
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| 262 |
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| 263 | #define GETXXKEY_R_FUNC getpwnam_r
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| 264 | #define GETXXKEY_R_PARSER bb__parsepwent
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| 265 | #define GETXXKEY_R_ENTTYPE struct passwd
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| 266 | #define GETXXKEY_R_TEST(ENT) (!strcmp((ENT)->pw_name, key))
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| 267 | #define GETXXKEY_R_KEYTYPE const char *__restrict
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| 268 | #define GETXXKEY_R_PATHNAME _PATH_PASSWD
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| 269 | #include "pwd_grp_internal.c"
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| 270 |
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| 271 | #define GETXXKEY_R_FUNC getgrnam_r
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| 272 | #define GETXXKEY_R_PARSER bb__parsegrent
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| 273 | #define GETXXKEY_R_ENTTYPE struct group
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| 274 | #define GETXXKEY_R_TEST(ENT) (!strcmp((ENT)->gr_name, key))
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| 275 | #define GETXXKEY_R_KEYTYPE const char *__restrict
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| 276 | #define GETXXKEY_R_PATHNAME _PATH_GROUP
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| 277 | #include "pwd_grp_internal.c"
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| 278 |
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| 279 | #if ENABLE_USE_BB_SHADOW
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| 280 | #define GETXXKEY_R_FUNC getspnam_r
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| 281 | #define GETXXKEY_R_PARSER bb__parsespent
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| 282 | #define GETXXKEY_R_ENTTYPE struct spwd
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| 283 | #define GETXXKEY_R_TEST(ENT) (!strcmp((ENT)->sp_namp, key))
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| 284 | #define GETXXKEY_R_KEYTYPE const char *__restrict
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| 285 | #define GETXXKEY_R_PATHNAME _PATH_SHADOW
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| 286 | #include "pwd_grp_internal.c"
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| 287 | #endif
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| 288 |
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| 289 | #define GETXXKEY_R_FUNC getpwuid_r
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| 290 | #define GETXXKEY_R_PARSER bb__parsepwent
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| 291 | #define GETXXKEY_R_ENTTYPE struct passwd
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| 292 | #define GETXXKEY_R_TEST(ENT) ((ENT)->pw_uid == key)
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| 293 | #define GETXXKEY_R_KEYTYPE uid_t
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| 294 | #define GETXXKEY_R_PATHNAME _PATH_PASSWD
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| 295 | #include "pwd_grp_internal.c"
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| 296 |
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| 297 | #define GETXXKEY_R_FUNC getgrgid_r
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| 298 | #define GETXXKEY_R_PARSER bb__parsegrent
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| 299 | #define GETXXKEY_R_ENTTYPE struct group
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| 300 | #define GETXXKEY_R_TEST(ENT) ((ENT)->gr_gid == key)
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| 301 | #define GETXXKEY_R_KEYTYPE gid_t
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| 302 | #define GETXXKEY_R_PATHNAME _PATH_GROUP
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| 303 | #include "pwd_grp_internal.c"
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| 304 |
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| 305 | /**********************************************************************/
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| 306 | /* TODO: audit & stop using these in bbox, they pull in static buffers */
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| 307 |
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| 308 | /* This one has many users */
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| 309 | struct passwd *getpwuid(uid_t uid)
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| 310 | {
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| 311 | struct statics *S;
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| 312 | struct passwd *resultbuf = RESULTBUF(getpwuid);
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| 313 | char *buffer = BUFFER(getpwuid);
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| 314 | struct passwd *result;
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| 315 |
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| 316 | getpwuid_r(uid, resultbuf, buffer, sizeof(BUFFER(getpwuid)), &result);
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| 317 | return result;
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| 318 | }
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| 319 |
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| 320 | /* This one has many users */
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| 321 | struct group *getgrgid(gid_t gid)
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| 322 | {
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| 323 | struct statics *S;
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| 324 | struct group *resultbuf = RESULTBUF(getgrgid);
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| 325 | char *buffer = BUFFER(getgrgid);
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| 326 | struct group *result;
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| 327 |
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| 328 | getgrgid_r(gid, resultbuf, buffer, sizeof(BUFFER(getgrgid)), &result);
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| 329 | return result;
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| 330 | }
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| 331 |
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| 332 | #if 0 //ENABLE_USE_BB_SHADOW
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| 333 | /* This function is non-standard and is currently not built. It seems
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| 334 | * to have been created as a reentrant version of the non-standard
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| 335 | * functions getspuid. Why getspuid was added, I do not know. */
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| 336 | int getspuid_r(uid_t uid, struct spwd *__restrict resultbuf,
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| 337 | char *__restrict buffer, size_t buflen,
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| 338 | struct spwd **__restrict result)
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| 339 | {
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| 340 | int rv;
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| 341 | struct passwd *pp;
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| 342 | struct passwd password;
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| 343 | char pwd_buff[PWD_BUFFER_SIZE];
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| 344 |
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| 345 | *result = NULL;
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| 346 | rv = getpwuid_r(uid, &password, pwd_buff, sizeof(pwd_buff), &pp);
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| 347 | if (!rv) {
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| 348 | rv = getspnam_r(password.pw_name, resultbuf, buffer, buflen, result);
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| 349 | }
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| 350 |
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| 351 | return rv;
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| 352 | }
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| 353 |
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| 354 | /* This function is non-standard and is currently not built.
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| 355 | * Why it was added, I do not know. */
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| 356 | struct spwd *getspuid(uid_t uid)
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| 357 | {
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| 358 | struct statics *S;
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| 359 | struct spwd *resultbuf = RESULTBUF(getspuid);
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| 360 | char *buffer = BUFFER(getspuid);
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| 361 | struct spwd *result;
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| 362 |
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| 363 | getspuid_r(uid, resultbuf, buffer, sizeof(BUFFER(getspuid)), &result);
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| 364 | return result;
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| 365 | }
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| 366 | #endif
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| 367 |
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| 368 | /* This one has many users */
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| 369 | struct passwd *getpwnam(const char *name)
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| 370 | {
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| 371 | struct statics *S;
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| 372 | struct passwd *resultbuf = RESULTBUF(getpwnam);
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| 373 | char *buffer = BUFFER(getpwnam);
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| 374 | struct passwd *result;
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| 375 |
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| 376 | getpwnam_r(name, resultbuf, buffer, sizeof(BUFFER(getpwnam)), &result);
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| 377 | return result;
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| 378 | }
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| 379 |
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| 380 | /* This one has many users */
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| 381 | struct group *getgrnam(const char *name)
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| 382 | {
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| 383 | struct statics *S;
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| 384 | struct group *resultbuf = RESULTBUF(getgrnam);
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| 385 | char *buffer = BUFFER(getgrnam);
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| 386 | struct group *result;
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| 387 |
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| 388 | getgrnam_r(name, resultbuf, buffer, sizeof(BUFFER(getgrnam)), &result);
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| 389 | return result;
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| 390 | }
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| 391 |
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| 392 | #if 0 //ENABLE_USE_BB_SHADOW
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| 393 | struct spwd *getspnam(const char *name)
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| 394 | {
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| 395 | struct statics *S;
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| 396 | struct spwd *resultbuf = RESULTBUF(getspnam);
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| 397 | char *buffer = BUFFER(getspnam);
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| 398 | struct spwd *result;
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| 399 |
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| 400 | getspnam_r(name, resultbuf, buffer, sizeof(BUFFER(getspnam)), &result);
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| 401 | return result;
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| 402 | }
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| 403 | #endif
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| 404 |
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| 405 | /**********************************************************************/
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| 406 |
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| 407 | /* FIXME: we don't have such CONFIG_xx - ?! */
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| 408 |
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| 409 | #if defined CONFIG_USE_BB_THREADSAFE_SHADOW && defined PTHREAD_MUTEX_INITIALIZER
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| 410 | static pthread_mutex_t mylock = PTHREAD_MUTEX_INITIALIZER;
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| 411 | # define LOCK pthread_mutex_lock(&mylock)
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| 412 | # define UNLOCK pthread_mutex_unlock(&mylock);
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| 413 | #else
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| 414 | # define LOCK ((void) 0)
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| 415 | # define UNLOCK ((void) 0)
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| 416 | #endif
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| 417 |
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| 418 | static FILE *pwf /*= NULL*/;
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| 419 | void setpwent(void)
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| 420 | {
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| 421 | LOCK;
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| 422 | if (pwf) {
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| 423 | rewind(pwf);
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| 424 | }
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| 425 | UNLOCK;
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| 426 | }
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| 427 |
|
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| 428 | void endpwent(void)
|
---|
| 429 | {
|
---|
| 430 | LOCK;
|
---|
| 431 | if (pwf) {
|
---|
| 432 | fclose(pwf);
|
---|
| 433 | pwf = NULL;
|
---|
| 434 | }
|
---|
| 435 | UNLOCK;
|
---|
| 436 | }
|
---|
| 437 |
|
---|
| 438 |
|
---|
| 439 | int getpwent_r(struct passwd *__restrict resultbuf,
|
---|
| 440 | char *__restrict buffer, size_t buflen,
|
---|
| 441 | struct passwd **__restrict result)
|
---|
| 442 | {
|
---|
| 443 | int rv;
|
---|
| 444 |
|
---|
| 445 | LOCK;
|
---|
| 446 | *result = NULL; /* In case of error... */
|
---|
| 447 |
|
---|
| 448 | if (!pwf) {
|
---|
| 449 | pwf = fopen_for_read(_PATH_PASSWD);
|
---|
| 450 | if (!pwf) {
|
---|
| 451 | rv = errno;
|
---|
| 452 | goto ERR;
|
---|
| 453 | }
|
---|
| 454 | }
|
---|
| 455 |
|
---|
| 456 | rv = bb__pgsreader(bb__parsepwent, resultbuf, buffer, buflen, pwf);
|
---|
| 457 | if (!rv) {
|
---|
| 458 | *result = resultbuf;
|
---|
| 459 | }
|
---|
| 460 |
|
---|
| 461 | ERR:
|
---|
| 462 | UNLOCK;
|
---|
| 463 | return rv;
|
---|
| 464 | }
|
---|
| 465 |
|
---|
| 466 | static FILE *grf /*= NULL*/;
|
---|
| 467 | void setgrent(void)
|
---|
| 468 | {
|
---|
| 469 | LOCK;
|
---|
| 470 | if (grf) {
|
---|
| 471 | rewind(grf);
|
---|
| 472 | }
|
---|
| 473 | UNLOCK;
|
---|
| 474 | }
|
---|
| 475 |
|
---|
| 476 | void endgrent(void)
|
---|
| 477 | {
|
---|
| 478 | LOCK;
|
---|
| 479 | if (grf) {
|
---|
| 480 | fclose(grf);
|
---|
| 481 | grf = NULL;
|
---|
| 482 | }
|
---|
| 483 | UNLOCK;
|
---|
| 484 | }
|
---|
| 485 |
|
---|
| 486 | int getgrent_r(struct group *__restrict resultbuf,
|
---|
| 487 | char *__restrict buffer, size_t buflen,
|
---|
| 488 | struct group **__restrict result)
|
---|
| 489 | {
|
---|
| 490 | int rv;
|
---|
| 491 |
|
---|
| 492 | LOCK;
|
---|
| 493 | *result = NULL; /* In case of error... */
|
---|
| 494 |
|
---|
| 495 | if (!grf) {
|
---|
| 496 | grf = fopen_for_read(_PATH_GROUP);
|
---|
| 497 | if (!grf) {
|
---|
| 498 | rv = errno;
|
---|
| 499 | goto ERR;
|
---|
| 500 | }
|
---|
| 501 | }
|
---|
| 502 |
|
---|
| 503 | rv = bb__pgsreader(bb__parsegrent, resultbuf, buffer, buflen, grf);
|
---|
| 504 | if (!rv) {
|
---|
| 505 | *result = resultbuf;
|
---|
| 506 | }
|
---|
| 507 |
|
---|
| 508 | ERR:
|
---|
| 509 | UNLOCK;
|
---|
| 510 | return rv;
|
---|
| 511 | }
|
---|
| 512 |
|
---|
| 513 | #ifdef UNUSED_FOR_NOW
|
---|
| 514 | #if ENABLE_USE_BB_SHADOW
|
---|
| 515 | static FILE *spf /*= NULL*/;
|
---|
| 516 | void setspent(void)
|
---|
| 517 | {
|
---|
| 518 | LOCK;
|
---|
| 519 | if (spf) {
|
---|
| 520 | rewind(spf);
|
---|
| 521 | }
|
---|
| 522 | UNLOCK;
|
---|
| 523 | }
|
---|
| 524 |
|
---|
| 525 | void endspent(void)
|
---|
| 526 | {
|
---|
| 527 | LOCK;
|
---|
| 528 | if (spf) {
|
---|
| 529 | fclose(spf);
|
---|
| 530 | spf = NULL;
|
---|
| 531 | }
|
---|
| 532 | UNLOCK;
|
---|
| 533 | }
|
---|
| 534 |
|
---|
| 535 | int getspent_r(struct spwd *resultbuf, char *buffer,
|
---|
| 536 | size_t buflen, struct spwd **result)
|
---|
| 537 | {
|
---|
| 538 | int rv;
|
---|
| 539 |
|
---|
| 540 | LOCK;
|
---|
| 541 | *result = NULL; /* In case of error... */
|
---|
| 542 |
|
---|
| 543 | if (!spf) {
|
---|
| 544 | spf = fopen_for_read(_PATH_SHADOW);
|
---|
| 545 | if (!spf) {
|
---|
| 546 | rv = errno;
|
---|
| 547 | goto ERR;
|
---|
| 548 | }
|
---|
| 549 | }
|
---|
| 550 |
|
---|
| 551 | rv = bb__pgsreader(bb__parsespent, resultbuf, buffer, buflen, spf);
|
---|
| 552 | if (!rv) {
|
---|
| 553 | *result = resultbuf;
|
---|
| 554 | }
|
---|
| 555 |
|
---|
| 556 | ERR:
|
---|
| 557 | UNLOCK;
|
---|
| 558 | return rv;
|
---|
| 559 | }
|
---|
| 560 | #endif
|
---|
| 561 | #endif /* UNUSED_FOR_NOW */
|
---|
| 562 |
|
---|
| 563 | #ifdef UNUSED_SINCE_WE_AVOID_STATIC_BUFS
|
---|
| 564 | struct passwd *getpwent(void)
|
---|
| 565 | {
|
---|
| 566 | static char line_buff[PWD_BUFFER_SIZE];
|
---|
| 567 | static struct passwd pwd;
|
---|
| 568 | struct passwd *result;
|
---|
| 569 |
|
---|
| 570 | getpwent_r(&pwd, line_buff, sizeof(line_buff), &result);
|
---|
| 571 | return result;
|
---|
| 572 | }
|
---|
| 573 |
|
---|
| 574 | struct group *getgrent(void)
|
---|
| 575 | {
|
---|
| 576 | static char line_buff[GRP_BUFFER_SIZE];
|
---|
| 577 | static struct group gr;
|
---|
| 578 | struct group *result;
|
---|
| 579 |
|
---|
| 580 | getgrent_r(&gr, line_buff, sizeof(line_buff), &result);
|
---|
| 581 | return result;
|
---|
| 582 | }
|
---|
| 583 |
|
---|
| 584 | #if ENABLE_USE_BB_SHADOW
|
---|
| 585 | struct spwd *getspent(void)
|
---|
| 586 | {
|
---|
| 587 | static char line_buff[PWD_BUFFER_SIZE];
|
---|
| 588 | static struct spwd spwd;
|
---|
| 589 | struct spwd *result;
|
---|
| 590 |
|
---|
| 591 | getspent_r(&spwd, line_buff, sizeof(line_buff), &result);
|
---|
| 592 | return result;
|
---|
| 593 | }
|
---|
| 594 |
|
---|
| 595 | struct spwd *sgetspent(const char *string)
|
---|
| 596 | {
|
---|
| 597 | static char line_buff[PWD_BUFFER_SIZE];
|
---|
| 598 | static struct spwd spwd;
|
---|
| 599 | struct spwd *result;
|
---|
| 600 |
|
---|
| 601 | sgetspent_r(string, &spwd, line_buff, sizeof(line_buff), &result);
|
---|
| 602 | return result;
|
---|
| 603 | }
|
---|
| 604 | #endif
|
---|
| 605 | #endif /* UNUSED_SINCE_WE_AVOID_STATIC_BUFS */
|
---|
| 606 |
|
---|
| 607 | static gid_t *getgrouplist_internal(int *ngroups_ptr, const char *user, gid_t gid)
|
---|
| 608 | {
|
---|
| 609 | FILE *grfile;
|
---|
| 610 | gid_t *group_list;
|
---|
| 611 | int ngroups;
|
---|
| 612 | struct group group;
|
---|
| 613 | char buff[PWD_BUFFER_SIZE];
|
---|
| 614 |
|
---|
| 615 | /* We alloc space for 8 gids at a time. */
|
---|
| 616 | group_list = xmalloc(8 * sizeof(group_list[0]));
|
---|
| 617 | group_list[0] = gid;
|
---|
| 618 | ngroups = 1;
|
---|
| 619 |
|
---|
| 620 | grfile = fopen_for_read(_PATH_GROUP);
|
---|
| 621 | if (grfile) {
|
---|
| 622 | while (!bb__pgsreader(bb__parsegrent, &group, buff, sizeof(buff), grfile)) {
|
---|
| 623 | char **m;
|
---|
| 624 | assert(group.gr_mem); /* Must have at least a NULL terminator. */
|
---|
| 625 | if (group.gr_gid == gid)
|
---|
| 626 | continue;
|
---|
| 627 | for (m = group.gr_mem; *m; m++) {
|
---|
| 628 | if (strcmp(*m, user) != 0)
|
---|
| 629 | continue;
|
---|
| 630 | group_list = xrealloc_vector(group_list, /*8=2^3:*/ 3, ngroups);
|
---|
| 631 | group_list[ngroups++] = group.gr_gid;
|
---|
| 632 | break;
|
---|
| 633 | }
|
---|
| 634 | }
|
---|
| 635 | fclose(grfile);
|
---|
| 636 | }
|
---|
| 637 | *ngroups_ptr = ngroups;
|
---|
| 638 | return group_list;
|
---|
| 639 | }
|
---|
| 640 |
|
---|
| 641 | int initgroups(const char *user, gid_t gid)
|
---|
| 642 | {
|
---|
| 643 | int ngroups;
|
---|
| 644 | gid_t *group_list = getgrouplist_internal(&ngroups, user, gid);
|
---|
| 645 |
|
---|
| 646 | ngroups = setgroups(ngroups, group_list);
|
---|
| 647 | free(group_list);
|
---|
| 648 | return ngroups;
|
---|
| 649 | }
|
---|
| 650 |
|
---|
| 651 | int getgrouplist(const char *user, gid_t gid, gid_t *groups, int *ngroups)
|
---|
| 652 | {
|
---|
| 653 | int ngroups_old = *ngroups;
|
---|
| 654 | gid_t *group_list = getgrouplist_internal(ngroups, user, gid);
|
---|
| 655 |
|
---|
| 656 | if (*ngroups <= ngroups_old) {
|
---|
| 657 | ngroups_old = *ngroups;
|
---|
| 658 | memcpy(groups, group_list, ngroups_old * sizeof(groups[0]));
|
---|
| 659 | } else {
|
---|
| 660 | ngroups_old = -1;
|
---|
| 661 | }
|
---|
| 662 | free(group_list);
|
---|
| 663 | return ngroups_old;
|
---|
| 664 | }
|
---|
| 665 |
|
---|
| 666 | #ifdef UNUSED_SINCE_WE_AVOID_STATIC_BUFS
|
---|
| 667 | int putpwent(const struct passwd *__restrict p, FILE *__restrict f)
|
---|
| 668 | {
|
---|
| 669 | int rv = -1;
|
---|
| 670 |
|
---|
| 671 | #if 0
|
---|
| 672 | /* glibc does this check */
|
---|
| 673 | if (!p || !f) {
|
---|
| 674 | errno = EINVAL;
|
---|
| 675 | return rv;
|
---|
| 676 | }
|
---|
| 677 | #endif
|
---|
| 678 |
|
---|
| 679 | /* No extra thread locking is needed above what fprintf does. */
|
---|
| 680 | if (fprintf(f, "%s:%s:%lu:%lu:%s:%s:%s\n",
|
---|
| 681 | p->pw_name, p->pw_passwd,
|
---|
| 682 | (unsigned long)(p->pw_uid),
|
---|
| 683 | (unsigned long)(p->pw_gid),
|
---|
| 684 | p->pw_gecos, p->pw_dir, p->pw_shell) >= 0
|
---|
| 685 | ) {
|
---|
| 686 | rv = 0;
|
---|
| 687 | }
|
---|
| 688 |
|
---|
| 689 | return rv;
|
---|
| 690 | }
|
---|
| 691 |
|
---|
| 692 | int putgrent(const struct group *__restrict p, FILE *__restrict f)
|
---|
| 693 | {
|
---|
| 694 | int rv = -1;
|
---|
| 695 |
|
---|
| 696 | #if 0
|
---|
| 697 | /* glibc does this check */
|
---|
| 698 | if (!p || !f) {
|
---|
| 699 | errno = EINVAL;
|
---|
| 700 | return rv;
|
---|
| 701 | }
|
---|
| 702 | #endif
|
---|
| 703 |
|
---|
| 704 | if (fprintf(f, "%s:%s:%lu:",
|
---|
| 705 | p->gr_name, p->gr_passwd,
|
---|
| 706 | (unsigned long)(p->gr_gid)) >= 0
|
---|
| 707 | ) {
|
---|
| 708 | static const char format[] ALIGN1 = ",%s";
|
---|
| 709 |
|
---|
| 710 | char **m;
|
---|
| 711 | const char *fmt;
|
---|
| 712 |
|
---|
| 713 | fmt = format + 1;
|
---|
| 714 |
|
---|
| 715 | assert(p->gr_mem);
|
---|
| 716 | m = p->gr_mem;
|
---|
| 717 |
|
---|
| 718 | while (1) {
|
---|
| 719 | if (!*m) {
|
---|
| 720 | if (fputc('\n', f) >= 0) {
|
---|
| 721 | rv = 0;
|
---|
| 722 | }
|
---|
| 723 | break;
|
---|
| 724 | }
|
---|
| 725 | if (fprintf(f, fmt, *m) < 0) {
|
---|
| 726 | break;
|
---|
| 727 | }
|
---|
| 728 | m++;
|
---|
| 729 | fmt = format;
|
---|
| 730 | }
|
---|
| 731 | }
|
---|
| 732 |
|
---|
| 733 | return rv;
|
---|
| 734 | }
|
---|
| 735 | #endif
|
---|
| 736 |
|
---|
| 737 | #if ENABLE_USE_BB_SHADOW
|
---|
| 738 | #ifdef UNUSED_FOR_NOW
|
---|
| 739 | static const unsigned char put_sp_off[] ALIGN1 = {
|
---|
| 740 | offsetof(struct spwd, sp_lstchg), /* 2 - not a char ptr */
|
---|
| 741 | offsetof(struct spwd, sp_min), /* 3 - not a char ptr */
|
---|
| 742 | offsetof(struct spwd, sp_max), /* 4 - not a char ptr */
|
---|
| 743 | offsetof(struct spwd, sp_warn), /* 5 - not a char ptr */
|
---|
| 744 | offsetof(struct spwd, sp_inact), /* 6 - not a char ptr */
|
---|
| 745 | offsetof(struct spwd, sp_expire) /* 7 - not a char ptr */
|
---|
| 746 | };
|
---|
| 747 |
|
---|
| 748 | int putspent(const struct spwd *p, FILE *stream)
|
---|
| 749 | {
|
---|
| 750 | const char *fmt;
|
---|
| 751 | long x;
|
---|
| 752 | int i;
|
---|
| 753 | int rv = -1;
|
---|
| 754 |
|
---|
| 755 | /* Unlike putpwent and putgrent, glibc does not check the args. */
|
---|
| 756 | if (fprintf(stream, "%s:%s:", p->sp_namp,
|
---|
| 757 | (p->sp_pwdp ? p->sp_pwdp : "")) < 0
|
---|
| 758 | ) {
|
---|
| 759 | goto DO_UNLOCK;
|
---|
| 760 | }
|
---|
| 761 |
|
---|
| 762 | for (i = 0; i < sizeof(put_sp_off); i++) {
|
---|
| 763 | fmt = "%ld:";
|
---|
| 764 | x = *(long *)((char *)p + put_sp_off[i]);
|
---|
| 765 | if (x == -1) {
|
---|
| 766 | fmt += 3;
|
---|
| 767 | }
|
---|
| 768 | if (fprintf(stream, fmt, x) < 0) {
|
---|
| 769 | goto DO_UNLOCK;
|
---|
| 770 | }
|
---|
| 771 | }
|
---|
| 772 |
|
---|
| 773 | if ((p->sp_flag != ~0UL) && (fprintf(stream, "%lu", p->sp_flag) < 0)) {
|
---|
| 774 | goto DO_UNLOCK;
|
---|
| 775 | }
|
---|
| 776 |
|
---|
| 777 | if (fputc('\n', stream) > 0) {
|
---|
| 778 | rv = 0;
|
---|
| 779 | }
|
---|
| 780 |
|
---|
| 781 | DO_UNLOCK:
|
---|
| 782 | return rv;
|
---|
| 783 | }
|
---|
| 784 | #endif
|
---|
| 785 | #endif /* USE_BB_SHADOW */
|
---|
| 786 |
|
---|
| 787 | /**********************************************************************/
|
---|
| 788 | /* Internal functions */
|
---|
| 789 | /**********************************************************************/
|
---|
| 790 |
|
---|
| 791 | static const unsigned char pw_off[] ALIGN1 = {
|
---|
| 792 | offsetof(struct passwd, pw_name), /* 0 */
|
---|
| 793 | offsetof(struct passwd, pw_passwd), /* 1 */
|
---|
| 794 | offsetof(struct passwd, pw_uid), /* 2 - not a char ptr */
|
---|
| 795 | offsetof(struct passwd, pw_gid), /* 3 - not a char ptr */
|
---|
| 796 | offsetof(struct passwd, pw_gecos), /* 4 */
|
---|
| 797 | offsetof(struct passwd, pw_dir), /* 5 */
|
---|
| 798 | offsetof(struct passwd, pw_shell) /* 6 */
|
---|
| 799 | };
|
---|
| 800 |
|
---|
| 801 | static int FAST_FUNC bb__parsepwent(void *data, char *line)
|
---|
| 802 | {
|
---|
| 803 | char *endptr;
|
---|
| 804 | char *p;
|
---|
| 805 | int i;
|
---|
| 806 |
|
---|
| 807 | i = 0;
|
---|
| 808 | while (1) {
|
---|
| 809 | p = (char *) data + pw_off[i];
|
---|
| 810 |
|
---|
| 811 | if (i < 2 || i > 3) {
|
---|
| 812 | *((char **) p) = line;
|
---|
| 813 | if (i == 6) {
|
---|
| 814 | return 0;
|
---|
| 815 | }
|
---|
| 816 | /* NOTE: glibc difference - glibc allows omission of
|
---|
| 817 | * ':' seperators after the gid field if all remaining
|
---|
| 818 | * entries are empty. We require all separators. */
|
---|
| 819 | line = strchr(line, ':');
|
---|
| 820 | if (!line) {
|
---|
| 821 | break;
|
---|
| 822 | }
|
---|
| 823 | } else {
|
---|
| 824 | unsigned long t = strtoul(line, &endptr, 10);
|
---|
| 825 | /* Make sure we had at least one digit, and that the
|
---|
| 826 | * failing char is the next field seperator ':'. See
|
---|
| 827 | * glibc difference note above. */
|
---|
| 828 | /* TODO: Also check for leading whitespace? */
|
---|
| 829 | if ((endptr == line) || (*endptr != ':')) {
|
---|
| 830 | break;
|
---|
| 831 | }
|
---|
| 832 | line = endptr;
|
---|
| 833 | if (i & 1) { /* i == 3 -- gid */
|
---|
| 834 | *((gid_t *) p) = t;
|
---|
| 835 | } else { /* i == 2 -- uid */
|
---|
| 836 | *((uid_t *) p) = t;
|
---|
| 837 | }
|
---|
| 838 | }
|
---|
| 839 |
|
---|
| 840 | *line++ = '\0';
|
---|
| 841 | i++;
|
---|
| 842 | } /* while (1) */
|
---|
| 843 |
|
---|
| 844 | return -1;
|
---|
| 845 | }
|
---|
| 846 |
|
---|
| 847 | /**********************************************************************/
|
---|
| 848 |
|
---|
| 849 | static const unsigned char gr_off[] ALIGN1 = {
|
---|
| 850 | offsetof(struct group, gr_name), /* 0 */
|
---|
| 851 | offsetof(struct group, gr_passwd), /* 1 */
|
---|
| 852 | offsetof(struct group, gr_gid) /* 2 - not a char ptr */
|
---|
| 853 | };
|
---|
| 854 |
|
---|
| 855 | static int FAST_FUNC bb__parsegrent(void *data, char *line)
|
---|
| 856 | {
|
---|
| 857 | char *endptr;
|
---|
| 858 | char *p;
|
---|
| 859 | int i;
|
---|
| 860 | char **members;
|
---|
| 861 | char *end_of_buf;
|
---|
| 862 |
|
---|
| 863 | end_of_buf = ((struct group *) data)->gr_name; /* Evil hack! */
|
---|
| 864 | i = 0;
|
---|
| 865 | while (1) {
|
---|
| 866 | p = (char *) data + gr_off[i];
|
---|
| 867 |
|
---|
| 868 | if (i < 2) {
|
---|
| 869 | *((char **) p) = line;
|
---|
| 870 | line = strchr(line, ':');
|
---|
| 871 | if (!line) {
|
---|
| 872 | break;
|
---|
| 873 | }
|
---|
| 874 | *line++ = '\0';
|
---|
| 875 | i++;
|
---|
| 876 | } else {
|
---|
| 877 | *((gid_t *) p) = strtoul(line, &endptr, 10);
|
---|
| 878 |
|
---|
| 879 | /* NOTE: glibc difference - glibc allows omission of the
|
---|
| 880 | * trailing colon when there is no member list. We treat
|
---|
| 881 | * this as an error. */
|
---|
| 882 |
|
---|
| 883 | /* Make sure we had at least one digit, and that the
|
---|
| 884 | * failing char is the next field seperator ':'. See
|
---|
| 885 | * glibc difference note above. */
|
---|
| 886 | if ((endptr == line) || (*endptr != ':')) {
|
---|
| 887 | break;
|
---|
| 888 | }
|
---|
| 889 |
|
---|
| 890 | i = 1; /* Count terminating NULL ptr. */
|
---|
| 891 | p = endptr;
|
---|
| 892 |
|
---|
| 893 | if (p[1]) { /* We have a member list to process. */
|
---|
| 894 | /* Overwrite the last ':' with a ',' before counting.
|
---|
| 895 | * This allows us to (1) test for initial ','
|
---|
| 896 | * and (2) adds one ',' so that the number of commas
|
---|
| 897 | * equals the member count. */
|
---|
| 898 | *p = ',';
|
---|
| 899 | do {
|
---|
| 900 | /* NOTE: glibc difference - glibc allows and trims leading
|
---|
| 901 | * (but not trailing) space. We treat this as an error. */
|
---|
| 902 | /* NOTE: glibc difference - glibc allows consecutive and
|
---|
| 903 | * trailing commas, and ignores "empty string" users. We
|
---|
| 904 | * treat this as an error. */
|
---|
| 905 | if (*p == ',') {
|
---|
| 906 | ++i;
|
---|
| 907 | *p = 0; /* nul-terminate each member string. */
|
---|
| 908 | if (!*++p || (*p == ',') || isspace(*p)) {
|
---|
| 909 | goto ERR;
|
---|
| 910 | }
|
---|
| 911 | }
|
---|
| 912 | } while (*++p);
|
---|
| 913 | }
|
---|
| 914 |
|
---|
| 915 | /* Now align (p+1), rounding up. */
|
---|
| 916 | /* Assumes sizeof(char **) is a power of 2. */
|
---|
| 917 | members = (char **)( (((intptr_t) p) + sizeof(char **))
|
---|
| 918 | & ~((intptr_t)(sizeof(char **) - 1)) );
|
---|
| 919 |
|
---|
| 920 | if (((char *)(members + i)) > end_of_buf) { /* No space. */
|
---|
| 921 | break;
|
---|
| 922 | }
|
---|
| 923 |
|
---|
| 924 | ((struct group *) data)->gr_mem = members;
|
---|
| 925 |
|
---|
| 926 | if (--i) {
|
---|
| 927 | p = endptr; /* Pointing to char prior to first member. */
|
---|
| 928 | while (1) {
|
---|
| 929 | *members++ = ++p;
|
---|
| 930 | if (!--i)
|
---|
| 931 | break;
|
---|
| 932 | while (*++p)
|
---|
| 933 | continue;
|
---|
| 934 | }
|
---|
| 935 | }
|
---|
| 936 | *members = NULL;
|
---|
| 937 |
|
---|
| 938 | return 0;
|
---|
| 939 | }
|
---|
| 940 | } /* while (1) */
|
---|
| 941 |
|
---|
| 942 | ERR:
|
---|
| 943 | return -1;
|
---|
| 944 | }
|
---|
| 945 |
|
---|
| 946 | /**********************************************************************/
|
---|
| 947 |
|
---|
| 948 | #if ENABLE_USE_BB_SHADOW
|
---|
| 949 | static const unsigned char sp_off[] ALIGN1 = {
|
---|
| 950 | offsetof(struct spwd, sp_namp), /* 0: char* */
|
---|
| 951 | offsetof(struct spwd, sp_pwdp), /* 1: char* */
|
---|
| 952 | offsetof(struct spwd, sp_lstchg), /* 2: long */
|
---|
| 953 | offsetof(struct spwd, sp_min), /* 3: long */
|
---|
| 954 | offsetof(struct spwd, sp_max), /* 4: long */
|
---|
| 955 | offsetof(struct spwd, sp_warn), /* 5: long */
|
---|
| 956 | offsetof(struct spwd, sp_inact), /* 6: long */
|
---|
| 957 | offsetof(struct spwd, sp_expire), /* 7: long */
|
---|
| 958 | offsetof(struct spwd, sp_flag) /* 8: unsigned long */
|
---|
| 959 | };
|
---|
| 960 |
|
---|
| 961 | static int FAST_FUNC bb__parsespent(void *data, char *line)
|
---|
| 962 | {
|
---|
| 963 | char *endptr;
|
---|
| 964 | char *p;
|
---|
| 965 | int i;
|
---|
| 966 |
|
---|
| 967 | i = 0;
|
---|
| 968 | while (1) {
|
---|
| 969 | p = (char *) data + sp_off[i];
|
---|
| 970 | if (i < 2) {
|
---|
| 971 | *((char **) p) = line;
|
---|
| 972 | line = strchr(line, ':');
|
---|
| 973 | if (!line) {
|
---|
| 974 | break; /* error */
|
---|
| 975 | }
|
---|
| 976 | } else {
|
---|
| 977 | *((long *) p) = strtoul(line, &endptr, 10);
|
---|
| 978 | if (endptr == line) {
|
---|
| 979 | *((long *) p) = -1L;
|
---|
| 980 | }
|
---|
| 981 | line = endptr;
|
---|
| 982 | if (i == 8) {
|
---|
| 983 | if (*line != '\0') {
|
---|
| 984 | break; /* error */
|
---|
| 985 | }
|
---|
| 986 | return 0; /* all ok */
|
---|
| 987 | }
|
---|
| 988 | if (*line != ':') {
|
---|
| 989 | break; /* error */
|
---|
| 990 | }
|
---|
| 991 | }
|
---|
| 992 | *line++ = '\0';
|
---|
| 993 | i++;
|
---|
| 994 | }
|
---|
| 995 |
|
---|
| 996 | return EINVAL;
|
---|
| 997 | }
|
---|
| 998 | #endif
|
---|
| 999 |
|
---|
| 1000 | /**********************************************************************/
|
---|
| 1001 |
|
---|
| 1002 | /* Reads until EOF, or until it finds a line which fits in the buffer
|
---|
| 1003 | * and for which the parser function succeeds.
|
---|
| 1004 | *
|
---|
| 1005 | * Returns 0 on success and ENOENT for end-of-file (glibc convention).
|
---|
| 1006 | */
|
---|
| 1007 | static int bb__pgsreader(
|
---|
| 1008 | int FAST_FUNC (*parserfunc)(void *d, char *line),
|
---|
| 1009 | void *data,
|
---|
| 1010 | char *__restrict line_buff,
|
---|
| 1011 | size_t buflen,
|
---|
| 1012 | FILE *f)
|
---|
| 1013 | {
|
---|
| 1014 | int skip;
|
---|
| 1015 | int rv = ERANGE;
|
---|
| 1016 |
|
---|
| 1017 | if (buflen < PWD_BUFFER_SIZE) {
|
---|
| 1018 | errno = rv;
|
---|
| 1019 | return rv;
|
---|
| 1020 | }
|
---|
| 1021 |
|
---|
| 1022 | skip = 0;
|
---|
| 1023 | while (1) {
|
---|
| 1024 | if (!fgets(line_buff, buflen, f)) {
|
---|
| 1025 | if (feof(f)) {
|
---|
| 1026 | rv = ENOENT;
|
---|
| 1027 | }
|
---|
| 1028 | break;
|
---|
| 1029 | }
|
---|
| 1030 |
|
---|
| 1031 | {
|
---|
| 1032 | int line_len = strlen(line_buff) - 1;
|
---|
| 1033 | if (line_len >= 0 && line_buff[line_len] == '\n') {
|
---|
| 1034 | line_buff[line_len] = '\0';
|
---|
| 1035 | } else
|
---|
| 1036 | if (line_len + 2 == buflen) {
|
---|
| 1037 | /* A start (or continuation) of overlong line */
|
---|
| 1038 | skip = 1;
|
---|
| 1039 | continue;
|
---|
| 1040 | } /* else: a last line in the file, and it has no '\n' */
|
---|
| 1041 | }
|
---|
| 1042 |
|
---|
| 1043 | if (skip) {
|
---|
| 1044 | /* This "line" is a remainder of overlong line, ignore */
|
---|
| 1045 | skip = 0;
|
---|
| 1046 | continue;
|
---|
| 1047 | }
|
---|
| 1048 |
|
---|
| 1049 | /* NOTE: glibc difference - glibc strips leading whitespace from
|
---|
| 1050 | * records. We do not allow leading whitespace. */
|
---|
| 1051 |
|
---|
| 1052 | /* Skip empty lines, comment lines, and lines with leading
|
---|
| 1053 | * whitespace. */
|
---|
| 1054 | if (line_buff[0] != '\0' && line_buff[0] != '#' && !isspace(line_buff[0])) {
|
---|
| 1055 | if (parserfunc == bb__parsegrent) {
|
---|
| 1056 | /* Do evil group hack:
|
---|
| 1057 | * The group entry parsing function needs to know where
|
---|
| 1058 | * the end of the buffer is so that it can construct the
|
---|
| 1059 | * group member ptr table. */
|
---|
| 1060 | ((struct group *) data)->gr_name = line_buff + buflen;
|
---|
| 1061 | }
|
---|
| 1062 | if (parserfunc(data, line_buff) == 0) {
|
---|
| 1063 | rv = 0;
|
---|
| 1064 | break;
|
---|
| 1065 | }
|
---|
| 1066 | }
|
---|
| 1067 | } /* while (1) */
|
---|
| 1068 |
|
---|
| 1069 | return rv;
|
---|
| 1070 | }
|
---|