-/* Copyright (C) 1996 Free Software Foundation, Inc.
+/* Copyright (C) 1996-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
+ 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
- Library General Public License for more details.
+ Lesser General Public License for more details.
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If not,
- write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+#include <assert.h>
#include <errno.h>
#include <libc-lock.h>
#include <stdlib.h>
+#include <resolv.h>
#include "nsswitch.h"
/*******************************************************************\
|* 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 parameter, can vary in number *|
-|* *|
+|* *|
|* ADD_VARIABLES - names of additional parameter *|
-|* *|
+|* *|
|* BUFLEN - length of buffer allocated for the non *|
|* reentrant version *|
-|* *|
+|* *|
|* Optionally the following vars can be defined: *|
-|* *|
+|* *|
|* NEED_H_ERRNO - an extra parameter will be passed to point to *|
|* the global `h_errno' variable. *|
-|* *|
+|* *|
\*******************************************************************/
+
+#ifdef HANDLE_DIGITS_DOTS
+# include <resolv/resolv_context.h>
+#endif
+
/* To make the real sources a bit prettier. */
#define REENTRANT_NAME APPEND_R (FUNCTION_NAME)
#define APPEND_R(name) APPEND_R1 (name)
/* 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_errno
+# define H_ERRNO_VAR , &h_errno_tmp
+# define H_ERRNO_VAR_P &h_errno_tmp
#else
# define H_ERRNO_PARM
# define H_ERRNO_VAR
+# define H_ERRNO_VAR_P NULL
#endif
+#ifdef HAVE_AF
+# define AF_VAL af
+#else
+# define AF_VAL AF_INET
+#endif
/* Prototype for reentrant version we use here. */
extern int INTERNAL (REENTRANT_NAME) (ADD_PARAMS, LOOKUP_TYPE *resbuf,
char *buffer, size_t buflen,
- LOOKUP_TYPE **result H_ERRNO_PARM);
+ LOOKUP_TYPE **result H_ERRNO_PARM)
+ attribute_hidden;
/* We need to protect the dynamic buffer handling. */
__libc_lock_define_initialized (static, lock);
+/* This points to the static buffer used. */
+libc_freeres_ptr (static char *buffer);
+
LOOKUP_TYPE *
FUNCTION_NAME (ADD_PARAMS)
{
- static char *buffer;
static size_t buffer_size;
static LOOKUP_TYPE resbuf;
LOOKUP_TYPE *result;
- int save;
+#ifdef NEED_H_ERRNO
+ int h_errno_tmp = 0;
+#endif
+
+#ifdef HANDLE_DIGITS_DOTS
+ /* Wrap both __nss_hostname_digits_dots and the actual lookup
+ function call in the same context. */
+ struct resolv_context *res_ctx = __resolv_context_get ();
+ if (res_ctx == NULL)
+ {
+# if NEED_H_ERRNO
+ __set_h_errno (NETDB_INTERNAL);
+# endif
+ return NULL;
+ }
+#endif
/* Get lock. */
__libc_lock_lock (lock);
if (buffer == NULL)
{
buffer_size = BUFLEN;
- buffer = malloc (buffer_size);
+ buffer = (char *) malloc (buffer_size);
}
+#ifdef HANDLE_DIGITS_DOTS
+ if (buffer != NULL)
+ {
+ if (__nss_hostname_digits_dots_context
+ (res_ctx, name, &resbuf, &buffer, &buffer_size, 0, &result, NULL,
+ AF_VAL, H_ERRNO_VAR_P))
+ goto done;
+ }
+#endif
+
while (buffer != NULL
- && INTERNAL (REENTRANT_NAME) (ADD_VARIABLES, &resbuf, buffer,
- buffer_size, &result H_ERRNO_VAR) != 0
- && errno == ERANGE)
+ && (INTERNAL (REENTRANT_NAME) (ADD_VARIABLES, &resbuf, buffer,
+ buffer_size, &result H_ERRNO_VAR)
+ == ERANGE)
+#ifdef NEED_H_ERRNO
+ && h_errno_tmp == NETDB_INTERNAL
+#endif
+ )
{
char *new_buf;
- buffer_size += BUFLEN;
- new_buf = realloc (buffer, buffer_size);
+ buffer_size *= 2;
+ new_buf = (char *) realloc (buffer, buffer_size);
if (new_buf == NULL)
- /* We are out of memory. Free the current buffer so that the
- process gets a chance for a normal termination. */
- free (buffer);
+ {
+ /* We are out of memory. Free the current buffer so that the
+ process gets a chance for a normal termination. */
+ free (buffer);
+ __set_errno (ENOMEM);
+ }
buffer = new_buf;
}
- /* Release lock. Preserve error value. */
- save = errno;
+ if (buffer == NULL)
+ result = NULL;
+
+#ifdef HANDLE_DIGITS_DOTS
+done:
+#endif
+ /* Release lock. */
__libc_lock_unlock (lock);
- __set_errno (save);
+
+#ifdef HANDLE_DIGITS_DOTS
+ __resolv_context_put (res_ctx);
+#endif
+
+#ifdef NEED_H_ERRNO
+ if (h_errno_tmp != 0)
+ __set_h_errno (h_errno_tmp);
+#endif
return result;
}
+
+nss_interface_function (FUNCTION_NAME)
projects / thirdparty / glibc.git / blobdiff