src/parsec/disk-image/parsec/parsec-benchmark/pkgs/libs/ssl/src/crypto/dso/dso_dl.c - public/gem5-resources - Git at Google

 /* dso_dl.c -*- mode:C; c-file-style: "eay" -*- */
 /* Written by Richard Levitte (richard@levitte.org) for the OpenSSL
  * project 2000.
  */
 /* ====================================================================
  * Copyright (c) 2000 The OpenSSL Project.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  *
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in
  *    the documentation and/or other materials provided with the
  *    distribution.
  *
  * 3. All advertising materials mentioning features or use of this
  *    software must display the following acknowledgment:
  *    "This product includes software developed by the OpenSSL Project
  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  *
  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  *    endorse or promote products derived from this software without
  *    prior written permission. For written permission, please contact
  *    licensing@OpenSSL.org.
  *
  * 5. Products derived from this software may not be called "OpenSSL"
  *    nor may "OpenSSL" appear in their names without prior written
  *    permission of the OpenSSL Project.
  *
  * 6. Redistributions of any form whatsoever must retain the following
  *    acknowledgment:
  *    "This product includes software developed by the OpenSSL Project
  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  *
  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  * OF THE POSSIBILITY OF SUCH DAMAGE.
  * ====================================================================
  *
  * This product includes cryptographic software written by Eric Young
  * (eay@cryptsoft.com).  This product includes software written by Tim
  * Hudson (tjh@cryptsoft.com).
  *
  */

 #include <stdio.h>
 #include "cryptlib.h"
 #include <openssl/dso.h>

 #ifndef DSO_DL
 DSO_METHOD *DSO_METHOD_dl(void)
        {
        return NULL;
        }
 #else

 #include <dl.h>

 /* Part of the hack in "dl_load" ... */
 #define DSO_MAX_TRANSLATED_SIZE 256

 static int dl_load(DSO *dso);
 static int dl_unload(DSO *dso);
 static void *dl_bind_var(DSO *dso, const char *symname);
 static DSO_FUNC_TYPE dl_bind_func(DSO *dso, const char *symname);
 #if 0
 static int dl_unbind_var(DSO *dso, char *symname, void *symptr);
 static int dl_unbind_func(DSO *dso, char *symname, DSO_FUNC_TYPE symptr);
 static int dl_init(DSO *dso);
 static int dl_finish(DSO *dso);
 static int dl_ctrl(DSO *dso, int cmd, long larg, void *parg);
 #endif
 static char *dl_name_converter(DSO *dso, const char *filename);
 static char *dl_merger(DSO *dso, const char *filespec1, const char *filespec2);

 static DSO_METHOD dso_meth_dl = {
 	"OpenSSL 'dl' shared library method",
 	dl_load,
 	dl_unload,
 	dl_bind_var,
 	dl_bind_func,
 /* For now, "unbind" doesn't exist */
 #if 0
 	NULL, /* unbind_var */
 	NULL, /* unbind_func */
 #endif
 	NULL, /* ctrl */
 	dl_name_converter,
 	dl_merger,
 	NULL, /* init */
 	NULL  /* finish */
 	};

 DSO_METHOD *DSO_METHOD_dl(void)
 	{
 	return(&dso_meth_dl);
 	}

 /* For this DSO_METHOD, our meth_data STACK will contain;
  * (i) the handle (shl_t) returned from shl_load().
  * NB: I checked on HPUX11 and shl_t is itself a pointer
  * type so the cast is safe.
  */

 static int dl_load(DSO *dso)
 	{
 	shl_t ptr = NULL;
 	/* We don't do any fancy retries or anything, just take the method's
 	 * (or DSO's if it has the callback set) best translation of the
 	 * platform-independant filename and try once with that. */
 	char *filename= DSO_convert_filename(dso, NULL);

 	if(filename == NULL)
 		{
 		DSOerr(DSO_F_DL_LOAD,DSO_R_NO_FILENAME);
 		goto err;
 		}
 	ptr = shl_load(filename, BIND_IMMEDIATE |
 		(dso->flags&DSO_FLAG_NO_NAME_TRANSLATION?0:DYNAMIC_PATH), 0L);
 	if(ptr == NULL)
 		{
 		DSOerr(DSO_F_DL_LOAD,DSO_R_LOAD_FAILED);
 		ERR_add_error_data(4, "filename(", filename, "): ",
 			strerror(errno));
 		goto err;
 		}
 	if(!sk_push(dso->meth_data, (char *)ptr))
 		{
 		DSOerr(DSO_F_DL_LOAD,DSO_R_STACK_ERROR);
 		goto err;
 		}
 	/* Success, stick the converted filename we've loaded under into the DSO
 	 * (it also serves as the indicator that we are currently loaded). */
 	dso->loaded_filename = filename;
 	return(1);
 err:
 	/* Cleanup! */
 	if(filename != NULL)
 		OPENSSL_free(filename);
 	if(ptr != NULL)
 		shl_unload(ptr);
 	return(0);
 	}

 static int dl_unload(DSO *dso)
 	{
 	shl_t ptr;
 	if(dso == NULL)
 		{
 		DSOerr(DSO_F_DL_UNLOAD,ERR_R_PASSED_NULL_PARAMETER);
 		return(0);
 		}
 	if(sk_num(dso->meth_data) < 1)
 		return(1);
 	/* Is this statement legal? */
 	ptr = (shl_t)sk_pop(dso->meth_data);
 	if(ptr == NULL)
 		{
 		DSOerr(DSO_F_DL_UNLOAD,DSO_R_NULL_HANDLE);
 		/* Should push the value back onto the stack in
 		 * case of a retry. */
 		sk_push(dso->meth_data, (char *)ptr);
 		return(0);
 		}
 	shl_unload(ptr);
 	return(1);
 	}

 static void *dl_bind_var(DSO *dso, const char *symname)
 	{
 	shl_t ptr;
 	void *sym;

 	if((dso == NULL) || (symname == NULL))
 		{
 		DSOerr(DSO_F_DL_BIND_VAR,ERR_R_PASSED_NULL_PARAMETER);
 		return(NULL);
 		}
 	if(sk_num(dso->meth_data) < 1)
 		{
 		DSOerr(DSO_F_DL_BIND_VAR,DSO_R_STACK_ERROR);
 		return(NULL);
 		}
 	ptr = (shl_t)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
 	if(ptr == NULL)
 		{
 		DSOerr(DSO_F_DL_BIND_VAR,DSO_R_NULL_HANDLE);
 		return(NULL);
 		}
 	if (shl_findsym(&ptr, symname, TYPE_UNDEFINED, &sym) < 0)
 		{
 		DSOerr(DSO_F_DL_BIND_VAR,DSO_R_SYM_FAILURE);
 		ERR_add_error_data(4, "symname(", symname, "): ",
 			strerror(errno));
 		return(NULL);
 		}
 	return(sym);
 	}

 static DSO_FUNC_TYPE dl_bind_func(DSO *dso, const char *symname)
 	{
 	shl_t ptr;
 	void *sym;

 	if((dso == NULL) || (symname == NULL))
 		{
 		DSOerr(DSO_F_DL_BIND_FUNC,ERR_R_PASSED_NULL_PARAMETER);
 		return(NULL);
 		}
 	if(sk_num(dso->meth_data) < 1)
 		{
 		DSOerr(DSO_F_DL_BIND_FUNC,DSO_R_STACK_ERROR);
 		return(NULL);
 		}
 	ptr = (shl_t)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
 	if(ptr == NULL)
 		{
 		DSOerr(DSO_F_DL_BIND_FUNC,DSO_R_NULL_HANDLE);
 		return(NULL);
 		}
 	if (shl_findsym(&ptr, symname, TYPE_UNDEFINED, &sym) < 0)
 		{
 		DSOerr(DSO_F_DL_BIND_FUNC,DSO_R_SYM_FAILURE);
 		ERR_add_error_data(4, "symname(", symname, "): ",
 			strerror(errno));
 		return(NULL);
 		}
 	return((DSO_FUNC_TYPE)sym);
 	}

 static char *dl_merger(DSO *dso, const char *filespec1, const char *filespec2)
 	{
 	char *merged;

 	if(!filespec1 && !filespec2)
 		{
 		DSOerr(DSO_F_DL_MERGER,
 				ERR_R_PASSED_NULL_PARAMETER);
 		return(NULL);
 		}
 	/* If the first file specification is a rooted path, it rules.
 	   same goes if the second file specification is missing. */
 	if (!filespec2 || filespec1[0] == '/')
 		{
 		merged = OPENSSL_malloc(strlen(filespec1) + 1);
 		if(!merged)
 			{
 			DSOerr(DSO_F_DL_MERGER,
 				ERR_R_MALLOC_FAILURE);
 			return(NULL);
 			}
 		strcpy(merged, filespec1);
 		}
 	/* If the first file specification is missing, the second one rules. */
 	else if (!filespec1)
 		{
 		merged = OPENSSL_malloc(strlen(filespec2) + 1);
 		if(!merged)
 			{
 			DSOerr(DSO_F_DL_MERGER,
 				ERR_R_MALLOC_FAILURE);
 			return(NULL);
 			}
 		strcpy(merged, filespec2);
 		}
 	else
 		/* This part isn't as trivial as it looks.  It assumes that
 		   the second file specification really is a directory, and
 		   makes no checks whatsoever.  Therefore, the result becomes
 		   the concatenation of filespec2 followed by a slash followed
 		   by filespec1. */
 		{
 		int spec2len, len;

 		spec2len = (filespec2 ? strlen(filespec2) : 0);
 		len = spec2len + (filespec1 ? strlen(filespec1) : 0);

 		if(filespec2 && filespec2[spec2len - 1] == '/')
 			{
 			spec2len--;
 			len--;
 			}
 		merged = OPENSSL_malloc(len + 2);
 		if(!merged)
 			{
 			DSOerr(DSO_F_DL_MERGER,
 				ERR_R_MALLOC_FAILURE);
 			return(NULL);
 			}
 		strcpy(merged, filespec2);
 		merged[spec2len] = '/';
 		strcpy(&merged[spec2len + 1], filespec1);
 		}
 	return(merged);
 	}

 /* This function is identical to the one in dso_dlfcn.c, but as it is highly
  * unlikely that both the "dl" *and* "dlfcn" variants are being compiled at the
  * same time, there's no great duplicating the code. Figuring out an elegant
  * way to share one copy of the code would be more difficult and would not
  * leave the implementations independant. */
 #if defined(__hpux)
 static const char extension[] = ".sl";
 #else
 static const char extension[] = ".so";
 #endif
 static char *dl_name_converter(DSO *dso, const char *filename)
 	{
 	char *translated;
 	int len, rsize, transform;

 	len = strlen(filename);
 	rsize = len + 1;
 	transform = (strstr(filename, "/") == NULL);
 		{
 		/* We will convert this to "%s.s?" or "lib%s.s?" */
 		rsize += strlen(extension);/* The length of ".s?" */
 		if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0)
 			rsize += 3; /* The length of "lib" */
 		}
 	translated = OPENSSL_malloc(rsize);
 	if(translated == NULL)
 		{
 		DSOerr(DSO_F_DL_NAME_CONVERTER,
 				DSO_R_NAME_TRANSLATION_FAILED);
 		return(NULL);
 		}
 	if(transform)
 		{
 		if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0)
 			sprintf(translated, "lib%s%s", filename, extension);
 		else
 			sprintf(translated, "%s%s", filename, extension);
 		}
 	else
 		sprintf(translated, "%s", filename);
 	return(translated);
 	}

 #endif /* DSO_DL */
	/* dso_dl.c -- mode:C; c-file-style: "eay" -- */
	/* Written by Richard Levitte (richard@levitte.org) for the OpenSSL
	* project 2000.
	*/
	/* ====================================================================
	* Copyright (c) 2000 The OpenSSL Project. All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	*
	* 1. Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	*
	* 2. Redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in
	* the documentation and/or other materials provided with the
	* distribution.
	*
	* 3. All advertising materials mentioning features or use of this
	* software must display the following acknowledgment:
	* "This product includes software developed by the OpenSSL Project
	* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
	*
	* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
	* endorse or promote products derived from this software without
	* prior written permission. For written permission, please contact
	* licensing@OpenSSL.org.
	*
	* 5. Products derived from this software may not be called "OpenSSL"
	* nor may "OpenSSL" appear in their names without prior written
	* permission of the OpenSSL Project.
	*
	* 6. Redistributions of any form whatsoever must retain the following
	* acknowledgment:
	* "This product includes software developed by the OpenSSL Project
	* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
	*
	* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
	* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
	* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
	* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
	* OF THE POSSIBILITY OF SUCH DAMAGE.
	* ====================================================================
	*
	* This product includes cryptographic software written by Eric Young
	* (eay@cryptsoft.com). This product includes software written by Tim
	* Hudson (tjh@cryptsoft.com).
	*
	*/

	#include <stdio.h>
	#include "cryptlib.h"
	#include <openssl/dso.h>

	#ifndef DSO_DL
	DSO_METHOD *DSO_METHOD_dl(void)
	{
	return NULL;
	}
	#else

	#include <dl.h>

	/* Part of the hack in "dl_load" ... */
	#define DSO_MAX_TRANSLATED_SIZE 256

	static int dl_load(DSO *dso);
	static int dl_unload(DSO *dso);
	static void dl_bind_var(DSO dso, const char *symname);
	static DSO_FUNC_TYPE dl_bind_func(DSO dso, const char symname);
	#if 0
	static int dl_unbind_var(DSO dso, char symname, void *symptr);
	static int dl_unbind_func(DSO dso, char symname, DSO_FUNC_TYPE symptr);
	static int dl_init(DSO *dso);
	static int dl_finish(DSO *dso);
	static int dl_ctrl(DSO dso, int cmd, long larg, void parg);
	#endif
	static char dl_name_converter(DSO dso, const char *filename);
	static char dl_merger(DSO dso, const char filespec1, const char filespec2);

	static DSO_METHOD dso_meth_dl = {
	"OpenSSL 'dl' shared library method",
	dl_load,
	dl_unload,
	dl_bind_var,
	dl_bind_func,
	/* For now, "unbind" doesn't exist */
	#if 0
	NULL, /* unbind_var */
	NULL, /* unbind_func */
	#endif
	NULL, /* ctrl */
	dl_name_converter,
	dl_merger,
	NULL, /* init */
	NULL /* finish */
	};

	DSO_METHOD *DSO_METHOD_dl(void)
	{
	return(&dso_meth_dl);
	}

	/* For this DSO_METHOD, our meth_data STACK will contain;
	* (i) the handle (shl_t) returned from shl_load().
	* NB: I checked on HPUX11 and shl_t is itself a pointer
	* type so the cast is safe.
	*/

	static int dl_load(DSO *dso)
	{
	shl_t ptr = NULL;
	/* We don't do any fancy retries or anything, just take the method's
	* (or DSO's if it has the callback set) best translation of the
	* platform-independant filename and try once with that. */
	char *filename= DSO_convert_filename(dso, NULL);

	if(filename == NULL)
	{
	DSOerr(DSO_F_DL_LOAD,DSO_R_NO_FILENAME);
	goto err;
	}
	ptr = shl_load(filename, BIND_IMMEDIATE \|
	(dso->flags&DSO_FLAG_NO_NAME_TRANSLATION?0:DYNAMIC_PATH), 0L);
	if(ptr == NULL)
	{
	DSOerr(DSO_F_DL_LOAD,DSO_R_LOAD_FAILED);
	ERR_add_error_data(4, "filename(", filename, "): ",
	strerror(errno));
	goto err;
	}
	if(!sk_push(dso->meth_data, (char *)ptr))
	{
	DSOerr(DSO_F_DL_LOAD,DSO_R_STACK_ERROR);
	goto err;
	}
	/* Success, stick the converted filename we've loaded under into the DSO
	* (it also serves as the indicator that we are currently loaded). */
	dso->loaded_filename = filename;
	return(1);
	err:
	/* Cleanup! */
	if(filename != NULL)
	OPENSSL_free(filename);
	if(ptr != NULL)
	shl_unload(ptr);
	return(0);
	}

	static int dl_unload(DSO *dso)
	{
	shl_t ptr;
	if(dso == NULL)
	{
	DSOerr(DSO_F_DL_UNLOAD,ERR_R_PASSED_NULL_PARAMETER);
	return(0);
	}
	if(sk_num(dso->meth_data) < 1)
	return(1);
	/* Is this statement legal? */
	ptr = (shl_t)sk_pop(dso->meth_data);
	if(ptr == NULL)
	{
	DSOerr(DSO_F_DL_UNLOAD,DSO_R_NULL_HANDLE);
	/* Should push the value back onto the stack in
	* case of a retry. */
	sk_push(dso->meth_data, (char *)ptr);
	return(0);
	}
	shl_unload(ptr);
	return(1);
	}

	static void dl_bind_var(DSO dso, const char *symname)
	{
	shl_t ptr;
	void *sym;

	if((dso == NULL) \|\| (symname == NULL))
	{
	DSOerr(DSO_F_DL_BIND_VAR,ERR_R_PASSED_NULL_PARAMETER);
	return(NULL);
	}
	if(sk_num(dso->meth_data) < 1)
	{
	DSOerr(DSO_F_DL_BIND_VAR,DSO_R_STACK_ERROR);
	return(NULL);
	}
	ptr = (shl_t)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
	if(ptr == NULL)
	{
	DSOerr(DSO_F_DL_BIND_VAR,DSO_R_NULL_HANDLE);
	return(NULL);
	}
	if (shl_findsym(&ptr, symname, TYPE_UNDEFINED, &sym) < 0)
	{
	DSOerr(DSO_F_DL_BIND_VAR,DSO_R_SYM_FAILURE);
	ERR_add_error_data(4, "symname(", symname, "): ",
	strerror(errno));
	return(NULL);
	}
	return(sym);
	}

	static DSO_FUNC_TYPE dl_bind_func(DSO dso, const char symname)
	{
	shl_t ptr;
	void *sym;

	if((dso == NULL) \|\| (symname == NULL))
	{
	DSOerr(DSO_F_DL_BIND_FUNC,ERR_R_PASSED_NULL_PARAMETER);
	return(NULL);
	}
	if(sk_num(dso->meth_data) < 1)
	{
	DSOerr(DSO_F_DL_BIND_FUNC,DSO_R_STACK_ERROR);
	return(NULL);
	}
	ptr = (shl_t)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
	if(ptr == NULL)
	{
	DSOerr(DSO_F_DL_BIND_FUNC,DSO_R_NULL_HANDLE);
	return(NULL);
	}
	if (shl_findsym(&ptr, symname, TYPE_UNDEFINED, &sym) < 0)
	{
	DSOerr(DSO_F_DL_BIND_FUNC,DSO_R_SYM_FAILURE);
	ERR_add_error_data(4, "symname(", symname, "): ",
	strerror(errno));
	return(NULL);
	}
	return((DSO_FUNC_TYPE)sym);
	}

	static char dl_merger(DSO dso, const char filespec1, const char filespec2)
	{
	char *merged;

	if(!filespec1 && !filespec2)
	{
	DSOerr(DSO_F_DL_MERGER,
	ERR_R_PASSED_NULL_PARAMETER);
	return(NULL);
	}
	/* If the first file specification is a rooted path, it rules.
	same goes if the second file specification is missing. */
	if (!filespec2 \|\| filespec1[0] == '/')
	{
	merged = OPENSSL_malloc(strlen(filespec1) + 1);
	if(!merged)
	{
	DSOerr(DSO_F_DL_MERGER,
	ERR_R_MALLOC_FAILURE);
	return(NULL);
	}
	strcpy(merged, filespec1);
	}
	/* If the first file specification is missing, the second one rules. */
	else if (!filespec1)
	{
	merged = OPENSSL_malloc(strlen(filespec2) + 1);
	if(!merged)
	{
	DSOerr(DSO_F_DL_MERGER,
	ERR_R_MALLOC_FAILURE);
	return(NULL);
	}
	strcpy(merged, filespec2);
	}
	else
	/* This part isn't as trivial as it looks. It assumes that
	the second file specification really is a directory, and
	makes no checks whatsoever. Therefore, the result becomes
	the concatenation of filespec2 followed by a slash followed
	by filespec1. */
	{
	int spec2len, len;

	spec2len = (filespec2 ? strlen(filespec2) : 0);
	len = spec2len + (filespec1 ? strlen(filespec1) : 0);

	if(filespec2 && filespec2[spec2len - 1] == '/')
	{
	spec2len--;
	len--;
	}
	merged = OPENSSL_malloc(len + 2);
	if(!merged)
	{
	DSOerr(DSO_F_DL_MERGER,
	ERR_R_MALLOC_FAILURE);
	return(NULL);
	}
	strcpy(merged, filespec2);
	merged[spec2len] = '/';
	strcpy(&merged[spec2len + 1], filespec1);
	}
	return(merged);
	}

	/* This function is identical to the one in dso_dlfcn.c, but as it is highly
	* unlikely that both the "dl" and "dlfcn" variants are being compiled at the
	* same time, there's no great duplicating the code. Figuring out an elegant
	* way to share one copy of the code would be more difficult and would not
	* leave the implementations independant. */
	#if defined(__hpux)
	static const char extension[] = ".sl";
	#else
	static const char extension[] = ".so";
	#endif
	static char dl_name_converter(DSO dso, const char *filename)
	{
	char *translated;
	int len, rsize, transform;

	len = strlen(filename);
	rsize = len + 1;
	transform = (strstr(filename, "/") == NULL);
	{
	/* We will convert this to "%s.s?" or "lib%s.s?" */
	rsize += strlen(extension);/* The length of ".s?" */
	if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0)
	rsize += 3; /* The length of "lib" */
	}
	translated = OPENSSL_malloc(rsize);
	if(translated == NULL)
	{
	DSOerr(DSO_F_DL_NAME_CONVERTER,
	DSO_R_NAME_TRANSLATION_FAILED);
	return(NULL);
	}
	if(transform)
	{
	if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0)
	sprintf(translated, "lib%s%s", filename, extension);
	else
	sprintf(translated, "%s%s", filename, extension);
	}
	else
	sprintf(translated, "%s", filename);
	return(translated);
	}

	#endif /* DSO_DL */