diff options
Diffstat (limited to 'nss/getXXbyYY_r.c')
| -rw-r--r-- | nss/getXXbyYY_r.c | 465 |
1 files changed, 0 insertions, 465 deletions
diff --git a/nss/getXXbyYY_r.c b/nss/getXXbyYY_r.c deleted file mode 100644 index 5962475737..0000000000 --- a/nss/getXXbyYY_r.c +++ /dev/null @@ -1,465 +0,0 @@ -/* Copyright (C) 1996-2017 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - <http://www.gnu.org/licenses/>. */ - -#include <assert.h> -#include <atomic.h> -#include <errno.h> -#include <stdbool.h> -#include "nsswitch.h" -#include "sysdep.h" -#ifdef USE_NSCD -# include <nscd/nscd_proto.h> -#endif -#ifdef NEED__RES_HCONF -# include <resolv/res_hconf.h> -#endif -#ifdef NEED__RES -# include <resolv.h> -#endif -/*******************************************************************\ -|* Here we assume several symbols to be defined: *| -|* *| -|* LOOKUP_TYPE - the return type of the function *| -|* *| -|* FUNCTION_NAME - name of the non-reentrant function *| -|* *| -|* DATABASE_NAME - name of the database the function accesses *| -|* (e.g., host, services, ...) *| -|* *| -|* ADD_PARAMS - additional parameters, can vary in number *| -|* *| -|* ADD_VARIABLES - names of additional parameters *| -|* *| -|* Optionally the following vars can be defined: *| -|* *| -|* EXTRA_PARAMS - optional parameters, can vary in number *| -|* *| -|* EXTRA_VARIABLES - names of optional parameter *| -|* *| -|* FUNCTION2_NAME - alternative name of the non-reentrant function *| -|* *| -|* NEED_H_ERRNO - an extra parameter will be passed to point to *| -|* the global `h_errno' variable. *| -|* *| -|* NEED__RES - the global _res variable might be used so we *| -|* will have to initialize it if necessary *| -|* *| -|* PREPROCESS - code run before anything else *| -|* *| -|* POSTPROCESS - code run after the lookup *| -|* *| -\*******************************************************************/ - -/* To make the real sources a bit prettier. */ -#define REENTRANT_NAME APPEND_R (FUNCTION_NAME) -#ifdef FUNCTION2_NAME -# define REENTRANT2_NAME APPEND_R (FUNCTION2_NAME) -#else -# define REENTRANT2_NAME NULL -#endif -#define APPEND_R(name) APPEND_R1 (name) -#define APPEND_R1(name) name##_r -#define INTERNAL(name) INTERNAL1 (name) -#define INTERNAL1(name) __##name -#define NEW(name) NEW1 (name) -#define NEW1(name) __new_##name - -#ifdef USE_NSCD -# define NSCD_NAME ADD_NSCD (REENTRANT_NAME) -# define ADD_NSCD(name) ADD_NSCD1 (name) -# define ADD_NSCD1(name) __nscd_##name -# define NOT_USENSCD_NAME ADD_NOT_NSCDUSE (DATABASE_NAME) -# define ADD_NOT_NSCDUSE(name) ADD_NOT_NSCDUSE1 (name) -# define ADD_NOT_NSCDUSE1(name) __nss_not_use_nscd_##name -# define CONCAT2(arg1, arg2) CONCAT2_2 (arg1, arg2) -# define CONCAT2_2(arg1, arg2) arg1##arg2 -#endif - -#define FUNCTION_NAME_STRING STRINGIZE (FUNCTION_NAME) -#define REENTRANT_NAME_STRING STRINGIZE (REENTRANT_NAME) -#ifdef FUNCTION2_NAME -# define REENTRANT2_NAME_STRING STRINGIZE (REENTRANT2_NAME) -#else -# define REENTRANT2_NAME_STRING NULL -#endif -#define DATABASE_NAME_STRING STRINGIZE (DATABASE_NAME) -#define STRINGIZE(name) STRINGIZE1 (name) -#define STRINGIZE1(name) #name - -#ifndef DB_LOOKUP_FCT -# define DB_LOOKUP_FCT CONCAT3_1 (__nss_, DATABASE_NAME, _lookup2) -# define CONCAT3_1(Pre, Name, Post) CONCAT3_2 (Pre, Name, Post) -# define CONCAT3_2(Pre, Name, Post) Pre##Name##Post -#endif - -/* Sometimes we need to store error codes in the `h_errno' variable. */ -#ifdef NEED_H_ERRNO -# define H_ERRNO_PARM , int *h_errnop -# define H_ERRNO_VAR , h_errnop -# define H_ERRNO_VAR_P h_errnop -#else -# define H_ERRNO_PARM -# define H_ERRNO_VAR -# define H_ERRNO_VAR_P NULL -#endif - -#ifndef EXTRA_PARAMS -# define EXTRA_PARAMS -#endif -#ifndef EXTRA_VARIABLES -# define EXTRA_VARIABLES -#endif - -#ifdef HAVE_AF -# define AF_VAL af -#else -# define AF_VAL AF_INET -#endif - - -/* Set defaults for merge functions that haven't been defined. */ -#ifndef DEEPCOPY_FN -static inline int -__copy_einval (LOOKUP_TYPE a, - const size_t b, - LOOKUP_TYPE *c, - char *d, - char **e) -{ - return EINVAL; -} -# define DEEPCOPY_FN __copy_einval -#endif - -#ifndef MERGE_FN -static inline int -__merge_einval (LOOKUP_TYPE *a, - char *b, - char *c, - size_t d, - LOOKUP_TYPE *e, - char *f) -{ - return EINVAL; -} -# define MERGE_FN __merge_einval -#endif - -#define CHECK_MERGE(err, status) \ - ({ \ - do \ - { \ - if (err) \ - { \ - __set_errno (err); \ - if (err == ERANGE) \ - status = NSS_STATUS_TRYAGAIN; \ - else \ - status = NSS_STATUS_UNAVAIL; \ - break; \ - } \ - } \ - while (0); \ - }) - -/* Type of the lookup function we need here. */ -typedef enum nss_status (*lookup_function) (ADD_PARAMS, LOOKUP_TYPE *, char *, - size_t, int * H_ERRNO_PARM - EXTRA_PARAMS); - -/* The lookup function for the first entry of this service. */ -extern int DB_LOOKUP_FCT (service_user **nip, const char *name, - const char *name2, void **fctp) - internal_function; -libc_hidden_proto (DB_LOOKUP_FCT) - - -int -INTERNAL (REENTRANT_NAME) (ADD_PARAMS, LOOKUP_TYPE *resbuf, char *buffer, - size_t buflen, LOOKUP_TYPE **result H_ERRNO_PARM - EXTRA_PARAMS) -{ - static bool startp_initialized; - static service_user *startp; - static lookup_function start_fct; - service_user *nip; - int do_merge = 0; - LOOKUP_TYPE mergegrp; - char *mergebuf = NULL; - char *endptr = NULL; - union - { - lookup_function l; - void *ptr; - } fct; - int no_more, err; - enum nss_status status = NSS_STATUS_UNAVAIL; -#ifdef USE_NSCD - int nscd_status; -#endif -#ifdef NEED_H_ERRNO - bool any_service = false; -#endif - -#ifdef PREPROCESS - PREPROCESS; -#endif - -#ifdef HANDLE_DIGITS_DOTS - switch (__nss_hostname_digits_dots (name, resbuf, &buffer, NULL, - buflen, result, &status, AF_VAL, - H_ERRNO_VAR_P)) - { - case -1: - return errno; - case 1: -#ifdef NEED_H_ERRNO - any_service = true; -#endif - goto done; - } -#endif - -#ifdef USE_NSCD - if (NOT_USENSCD_NAME > 0 && ++NOT_USENSCD_NAME > NSS_NSCD_RETRY) - NOT_USENSCD_NAME = 0; - - if (!NOT_USENSCD_NAME - && !__nss_database_custom[CONCAT2 (NSS_DBSIDX_, DATABASE_NAME)]) - { - nscd_status = NSCD_NAME (ADD_VARIABLES, resbuf, buffer, buflen, result - H_ERRNO_VAR); - if (nscd_status >= 0) - return nscd_status; - } -#endif - - if (! startp_initialized) - { - no_more = DB_LOOKUP_FCT (&nip, REENTRANT_NAME_STRING, - REENTRANT2_NAME_STRING, &fct.ptr); - if (no_more) - { - void *tmp_ptr = (service_user *) -1l; -#ifdef PTR_MANGLE - PTR_MANGLE (tmp_ptr); -#endif - startp = tmp_ptr; - } - else - { -#ifdef NEED__RES - /* The resolver code will really be used so we have to - initialize it. */ - if (__res_maybe_init (&_res, 0) == -1) - { - *h_errnop = NETDB_INTERNAL; - *result = NULL; - return errno; - } -#endif /* need _res */ -#ifdef NEED__RES_HCONF - _res_hconf_init (); -#endif /* need _res_hconf */ - - void *tmp_ptr = fct.l; -#ifdef PTR_MANGLE - PTR_MANGLE (tmp_ptr); -#endif - start_fct = tmp_ptr; - tmp_ptr = nip; -#ifdef PTR_MANGLE - PTR_MANGLE (tmp_ptr); -#endif - startp = tmp_ptr; - } - - /* Make sure start_fct and startp are written before - startp_initialized. */ - atomic_write_barrier (); - startp_initialized = true; - } - else - { - fct.l = start_fct; - nip = startp; -#ifdef PTR_DEMANGLE - PTR_DEMANGLE (fct.l); - PTR_DEMANGLE (nip); -#endif - no_more = nip == (service_user *) -1l; - } - - while (no_more == 0) - { -#ifdef NEED_H_ERRNO - any_service = true; -#endif - - status = DL_CALL_FCT (fct.l, (ADD_VARIABLES, resbuf, buffer, buflen, - &errno H_ERRNO_VAR EXTRA_VARIABLES)); - - /* The status is NSS_STATUS_TRYAGAIN and errno is ERANGE the - provided buffer is too small. In this case we should give - the user the possibility to enlarge the buffer and we should - not simply go on with the next service (even if the TRYAGAIN - action tells us so). */ - if (status == NSS_STATUS_TRYAGAIN -#ifdef NEED_H_ERRNO - && *h_errnop == NETDB_INTERNAL -#endif - && errno == ERANGE) - break; - - if (do_merge) - { - - if (status == NSS_STATUS_SUCCESS) - { - /* The previous loop saved a buffer for merging. - Perform the merge now. */ - err = MERGE_FN (&mergegrp, mergebuf, endptr, buflen, resbuf, - buffer); - CHECK_MERGE (err,status); - do_merge = 0; - } - else - { - /* If the result wasn't SUCCESS, copy the saved buffer back - into the result buffer and set the status back to - NSS_STATUS_SUCCESS to match the previous pass through the - loop. - * If the next action is CONTINUE, it will overwrite the value - currently in the buffer and return the new value. - * If the next action is RETURN, we'll return the previously- - acquired values. - * If the next action is MERGE, then it will be added to the - buffer saved from the previous source. */ - err = DEEPCOPY_FN (mergegrp, buflen, resbuf, buffer, NULL); - CHECK_MERGE (err, status); - status = NSS_STATUS_SUCCESS; - } - } - - /* If we were are configured to merge this value with the next one, - save the current value of the group struct. */ - if (nss_next_action (nip, status) == NSS_ACTION_MERGE - && status == NSS_STATUS_SUCCESS) - { - /* Copy the current values into a buffer to be merged with the next - set of retrieved values. */ - if (mergebuf == NULL) - { - /* Only allocate once and reuse it for as many merges as we need - to perform. */ - mergebuf = malloc (buflen); - if (mergebuf == NULL) - { - __set_errno (ENOMEM); - status = NSS_STATUS_UNAVAIL; - break; - } - } - - err = DEEPCOPY_FN (*resbuf, buflen, &mergegrp, mergebuf, &endptr); - CHECK_MERGE (err, status); - do_merge = 1; - } - - no_more = __nss_next2 (&nip, REENTRANT_NAME_STRING, - REENTRANT2_NAME_STRING, &fct.ptr, status, 0); - } - free (mergebuf); - mergebuf = NULL; - -#ifdef HANDLE_DIGITS_DOTS -done: -#endif - *result = status == NSS_STATUS_SUCCESS ? resbuf : NULL; -#ifdef NEED_H_ERRNO - if (status == NSS_STATUS_UNAVAIL && !any_service && errno != ENOENT) - /* This happens when we weren't able to use a service for reasons other - than the module not being found. In such a case, we'd want to tell the - caller that errno has the real reason for failure. */ - *h_errnop = NETDB_INTERNAL; - else if (status != NSS_STATUS_SUCCESS && !any_service) - /* We were not able to use any service. */ - *h_errnop = NO_RECOVERY; -#endif -#ifdef POSTPROCESS - POSTPROCESS; -#endif - - int res; - if (status == NSS_STATUS_SUCCESS || status == NSS_STATUS_NOTFOUND) - res = 0; - /* Don't pass back ERANGE if this is not for a too-small buffer. */ - else if (errno == ERANGE && status != NSS_STATUS_TRYAGAIN) - res = EINVAL; -#ifdef NEED_H_ERRNO - /* These functions only set errno if h_errno is NETDB_INTERNAL. */ - else if (status == NSS_STATUS_TRYAGAIN && *h_errnop != NETDB_INTERNAL) - res = EAGAIN; -#endif - else - return errno; - - __set_errno (res); - return res; -} - - -#ifdef NO_COMPAT_NEEDED -strong_alias (INTERNAL (REENTRANT_NAME), REENTRANT_NAME); -#elif !defined FUNCTION2_NAME -# include <shlib-compat.h> -# if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1_2) -# define OLD(name) OLD1 (name) -# define OLD1(name) __old_##name - -int -attribute_compat_text_section -OLD (REENTRANT_NAME) (ADD_PARAMS, LOOKUP_TYPE *resbuf, char *buffer, - size_t buflen, LOOKUP_TYPE **result H_ERRNO_PARM) -{ - int ret = INTERNAL (REENTRANT_NAME) (ADD_VARIABLES, resbuf, buffer, - buflen, result H_ERRNO_VAR); - - if (ret != 0 || result == NULL) - ret = -1; - - return ret; -} - -# define do_symbol_version(real, name, version) \ - compat_symbol (libc, real, name, version) -do_symbol_version (OLD (REENTRANT_NAME), REENTRANT_NAME, GLIBC_2_0); -# endif - -/* As INTERNAL (REENTRANT_NAME) may be hidden, we need an alias - in between so that the REENTRANT_NAME@@GLIBC_2.1.2 is not - hidden too. */ -strong_alias (INTERNAL (REENTRANT_NAME), NEW (REENTRANT_NAME)); - -# define do_default_symbol_version(real, name, version) \ - versioned_symbol (libc, real, name, version) -do_default_symbol_version (NEW (REENTRANT_NAME), - REENTRANT_NAME, GLIBC_2_1_2); -#endif - -nss_interface_function (REENTRANT_NAME) |