[thirdparty/openssl.git] / crypto / dso / dso_vms.c

/* dso_vms.c */
/* 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 <string.h>
#include <errno.h>
#ifdef VMS
#pragma message disable DOLLARID
#include <lib$routines.h>
#include <libfisdef.h>
#include <stsdef.h>
#include <descrip.h>
#include <starlet.h>
#endif
#include "cryptlib.h"
#include <openssl/dso.h>

#ifndef VMS
DSO_METHOD *DSO_METHOD_vms(void)
	{
	return NULL;
	}
#else
#pragma message disable DOLLARID

static int vms_load(DSO *dso);
static int vms_unload(DSO *dso);
static void *vms_bind_var(DSO *dso, const char *symname);
static DSO_FUNC_TYPE vms_bind_func(DSO *dso, const char *symname);
#if 0
static int vms_unbind_var(DSO *dso, char *symname, void *symptr);
static int vms_unbind_func(DSO *dso, char *symname, DSO_FUNC_TYPE symptr);
static int vms_init(DSO *dso);
static int vms_finish(DSO *dso);
static long vms_ctrl(DSO *dso, int cmd, long larg, void *parg);
#endif
static char *vms_name_converter(DSO *dso);

static DSO_METHOD dso_meth_vms = {
	"OpenSSL 'VMS' shared library method",
	vms_load,
	NULL, /* unload */
	vms_bind_var,
	vms_bind_func,
/* For now, "unbind" doesn't exist */
#if 0
	NULL, /* unbind_var */
	NULL, /* unbind_func */
#endif
	NULL, /* ctrl */
	vms_name_converter,
	NULL, /* init */
	NULL  /* finish */
	};

/* On VMS, the only "handle" is the file name.  LIB$FIND_IMAGE_SYMBOL depends
 * on the reference to the file name being the same for all calls regarding
 * one shared image, so we'll just store it in an instance of the following
 * structure and put a pointer to that instance in the meth_data stack.
 */
typedef struct dso_internal_st
	{
	/* This should contain the name only, no directory,
	 * no extension, nothing but a name. */
	struct dsc$descriptor_s filename_dsc;
	char filename[FILENAME_MAX+1];
	/* This contains whatever is not in filename, if needed.
	 * Normally not defined. */
	struct dsc$descriptor_s imagename_dsc;
	char imagename[FILENAME_MAX+1];
	} DSO_VMS_INTERNAL;


DSO_METHOD *DSO_METHOD_vms(void)
	{
	return(&dso_meth_vms);
	}

static int vms_load(DSO *dso)
	{
#if 0
	DSO_VMS_INTERNAL *p;
	const char *sp1, *sp2;	/* Search result */

	/* A file specification may look like this:
	 *
	 *	node::dev:[dir-spec]name.type;ver
	 *
	 * or (for compatibility with TOPS-20):
	 *
	 *	node::dev:<dir-spec>name.type;ver
	 *
	 * and the dir-spec uses '.' as separator.  Also, a dir-spec
	 * may consist of several parts, with mixed use of [] and <>:
	 *
	 *	[dir1.]<dir2>
	 *
	 * We need to split the file specification into the name and
	 * the rest (both before and after the name itself).
	 */
	/* Start with trying to find the end of a dir-spec, and save the
	   position of the byte after in sp1 */
	sp1 = strrchr(filename, ']');
	sp2 = strrchr(filename, '>');
	if (sp1 == NULL) sp1 = sp2;
	if (sp2 != NULL && sp2 > sp1) sp1 = sp2;
	if (sp1 == NULL) sp1 = strrchr(filename, ':');
	if (sp1 == NULL)
		sp1 = filename;
	else
		sp1++;		/* The byte after the found character */
	/* Now, let's see if there's a type, and save the position in sp2 */
	sp2 = strchr(sp1, '.');
	/* If we found it, that's where we'll cut.  Otherwise, look for a
	   version number and save the position in sp2 */
	if (sp2 == NULL) sp2 = strchr(sp1, ';');
	/* If there was still nothing to find, set sp2 to point at the end of
	   the string */
	if (sp2 == NULL) sp2 = sp1 + strlen(sp1);

	/* Check that we won't get buffer overflows */
	if (sp2 - sp1 > FILENAME_MAX
		|| (sp1 - filename) + strlen(sp2) > FILENAME_MAX)
		{
		DSOerr(DSO_F_VMS_LOAD,DSO_R_FILENAME_TOO_BIG);
		return(0);
		}

	p = (DSO_VMS_INTERNAL *)OPENSSL_malloc(sizeof(DSO_VMS_INTERNAL));
	if(p == NULL)
		{
		DSOerr(DSO_F_VMS_LOAD,ERR_R_MALLOC_FAILURE);
		return(0);
		}

	strncpy(p->filename, sp1, sp2-sp1);
	p->filename[sp2-sp1] = '\0';

	strncpy(p->imagename, filename, sp1-filename);
	p->imagename[sp1-filename] = '\0';
	strcat(p->imagename, sp2);

	p->filename_dsc.dsc$w_length = strlen(p->filename);
	p->filename_dsc.dsc$b_dtype = DSC$K_DTYPE_T;
	p->filename_dsc.dsc$b_class = DSC$K_CLASS_S;
	p->filename_dsc.dsc$a_pointer = p->filename;
	p->imagename_dsc.dsc$w_length = strlen(p->imagename);
	p->imagename_dsc.dsc$b_dtype = DSC$K_DTYPE_T;
	p->imagename_dsc.dsc$b_class = DSC$K_CLASS_S;
	p->imagename_dsc.dsc$a_pointer = p->imagename;

	if(!sk_push(dso->meth_data, (char *)p))
		{
		DSOerr(DSO_F_VMS_LOAD,DSO_R_STACK_ERROR);
		OPENSSL_free(p);
		return(0);
		}
	return(1);
#else
	/* See the comments lower down in the vms_name_converter
	 * "implementation" :-) */
	please_break_compilation();
	return(bother_richard);
#endif
	}

/* Note that this doesn't actually unload the shared image, as there is no
 * such thing in VMS.  Next time it get loaded again, a new copy will
 * actually be loaded.
 */
static int vms_unload(DSO *dso)
	{
	DSO_VMS_INTERNAL *p;
	if(dso == NULL)
		{
		DSOerr(DSO_F_VMS_UNLOAD,ERR_R_PASSED_NULL_PARAMETER);
		return(0);
		}
	if(sk_num(dso->meth_data) < 1)
		return(1);
	p = (DSO_VMS_INTERNAL *)sk_pop(dso->meth_data);
	if(p == NULL)
		{
		DSOerr(DSO_F_VMS_UNLOAD,DSO_R_NULL_HANDLE);
		return(0);
		}
	/* Cleanup */
	OPENSSL_free(p);
	return(1);
	}

/* We must do this in a separate function because of the way the exception
   handler works (it makes this function return */
static int do_find_symbol(DSO_VMS_INTERNAL *ptr,
	struct dsc$descriptor_s *symname_dsc, void **sym,
	unsigned long flags)
	{
	/* Make sure that signals are caught and returned instead of
	   aborting the program.  The exception handler gets unestablished
	   automatically on return from this function.  */
	lib$establish(lib$sig_to_ret);

	if(ptr->imagename_dsc.dsc$w_length)
		return lib$find_image_symbol(&ptr->filename_dsc,
			symname_dsc, sym,
			&ptr->imagename_dsc, flags);
	else
		return lib$find_image_symbol(&ptr->filename_dsc,
			symname_dsc, sym,
			0, flags);
	}

void vms_bind_sym(DSO *dso, const char *symname, void **sym)
	{
	DSO_VMS_INTERNAL *ptr;
	int status;
	int flags = LIB$M_FIS_MIXEDCASE;
	struct dsc$descriptor_s symname_dsc;
	*sym = NULL;

	symname_dsc.dsc$w_length = strlen(symname);
	symname_dsc.dsc$b_dtype = DSC$K_DTYPE_T;
	symname_dsc.dsc$b_class = DSC$K_CLASS_S;
	symname_dsc.dsc$a_pointer = (char *)symname; /* The cast is needed */

	if((dso == NULL) || (symname == NULL))
		{
		DSOerr(DSO_F_VMS_BIND_VAR,ERR_R_PASSED_NULL_PARAMETER);
		return;
		}
	if(sk_num(dso->meth_data) < 1)
		{
		DSOerr(DSO_F_VMS_BIND_VAR,DSO_R_STACK_ERROR);
		return;
		}
	ptr = (DSO_VMS_INTERNAL *)sk_value(dso->meth_data,
		sk_num(dso->meth_data) - 1);
	if(ptr == NULL)
		{
		DSOerr(DSO_F_VMS_BIND_VAR,DSO_R_NULL_HANDLE);
		return;
		}

	if(dso->flags & DSO_FLAG_UPCASE_SYMBOL) flags = 0;

	status = do_find_symbol(ptr, &symname_dsc, sym, flags);

	if(!$VMS_STATUS_SUCCESS(status))
		{
		unsigned short length;
		char errstring[257];
		struct dsc$descriptor_s errstring_dsc;

		errstring_dsc.dsc$w_length = sizeof(errstring);
		errstring_dsc.dsc$b_dtype = DSC$K_DTYPE_T;
		errstring_dsc.dsc$b_class = DSC$K_CLASS_S;
		errstring_dsc.dsc$a_pointer = errstring;

		*sym = NULL;

		status = sys$getmsg(status, &length, &errstring_dsc, 1, 0);

		if (!$VMS_STATUS_SUCCESS(status))
			lib$signal(status); /* This is really bad.  Abort!  */
		else
			{
			errstring[length] = '\0';

			DSOerr(DSO_F_VMS_BIND_VAR,DSO_R_SYM_FAILURE);
			if (ptr->imagename_dsc.dsc$w_length)
				ERR_add_error_data(9,
					"Symbol ", symname,
					" in ", ptr->filename,
					" (", ptr->imagename, ")",
					": ", errstring);
			else
				ERR_add_error_data(6,
					"Symbol ", symname,
					" in ", ptr->filename,
					": ", errstring);
			}
		return;
		}
	return;
	}

static void *vms_bind_var(DSO *dso, const char *symname)
	{
	void *sym = 0;
	vms_bind_sym(dso, symname, &sym);
	return sym;
	}

static DSO_FUNC_TYPE vms_bind_func(DSO *dso, const char *symname)
	{
	DSO_FUNC_TYPE sym = 0;
	vms_bind_sym(dso, symname, (void **)&sym);
	return sym;
	}

static char *vms_name_converter(DSO *dso)
	{
	/* Implementation note: on VMS is it preferable to do real conversions
	 * here, or to actually have it performed in-line with the bind calls
	 * (given that VMS never actually does a load except implicitly within
	 * the bind functions). Another note: normally (eg. dlfcn), the
	 * DSO_load call will either load, put the loaded filename into the DSO
	 * (which marks it effectively as "read-only"), and return success - or
	 * it will fail. VMS needs to work out what to do - otherwise DSO_load
	 * will always succeed, but leave the DSO looking unloaded (because the
	 * loaded_filename will be NULL still) and then real loading (and
	 * setting of loaded_filename) will only happen during the first bind
	 * call (which should have error checking anyway to prevent you calling
	 * it on an "unloaded" DSO - thus giving VMS *serious* grief). Richard,
	 * what do you think? Is it worth having DSO_load() try to find and pin
	 * itself to a library file (and populate loaded_filename) even though
	 * it's unecessary to actually do a load prior to the first bind call?
	 * I leave it to you ... :-) */
	deliberately_break_compilation_here();
	return(1);
	}

#endif /* VMS */
Commit	Line	Data
0e05f545 RL	1	/* dso_vms.c */
	2	/* Written by Richard Levitte (richard@levitte.org) for the OpenSSL
	3	* project 2000.
	4	*/
	5	/* ====================================================================
	6	* Copyright (c) 2000 The OpenSSL Project. All rights reserved.
	7	*
	8	* Redistribution and use in source and binary forms, with or without
	9	* modification, are permitted provided that the following conditions
	10	* are met:
	11	*
	12	* 1. Redistributions of source code must retain the above copyright
	13	* notice, this list of conditions and the following disclaimer.
	14	*
	15	* 2. Redistributions in binary form must reproduce the above copyright
	16	* notice, this list of conditions and the following disclaimer in
	17	* the documentation and/or other materials provided with the
	18	* distribution.
	19	*
	20	* 3. All advertising materials mentioning features or use of this
	21	* software must display the following acknowledgment:
	22	* "This product includes software developed by the OpenSSL Project
	23	* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
	24	*
	25	* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
	26	* endorse or promote products derived from this software without
	27	* prior written permission. For written permission, please contact
	28	* licensing@OpenSSL.org.
	29	*
	30	* 5. Products derived from this software may not be called "OpenSSL"
	31	* nor may "OpenSSL" appear in their names without prior written
	32	* permission of the OpenSSL Project.
	33	*
	34	* 6. Redistributions of any form whatsoever must retain the following
	35	* acknowledgment:
	36	* "This product includes software developed by the OpenSSL Project
	37	* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
	38	*
	39	* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
	40	* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	41	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	42	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
	43	* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	44	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	45	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
	46	* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	47	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	48	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	49	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
	50	* OF THE POSSIBILITY OF SUCH DAMAGE.
	51	* ====================================================================
	52	*
	53	* This product includes cryptographic software written by Eric Young
	54	* (eay@cryptsoft.com). This product includes software written by Tim
	55	* Hudson (tjh@cryptsoft.com).
	56	*
	57	*/
	58
	59	#include <stdio.h>
	60	#include <string.h>
	61	#include <errno.h>
ea4e4149	62	#ifdef VMS
3aa477f6	63	#pragma message disable DOLLARID
0e05f545 RL	64	#include <lib$routines.h>
	65	#include <libfisdef.h>
	66	#include <stsdef.h>
	67	#include <descrip.h>
	68	#include <starlet.h>
ea4e4149	69	#endif
0e05f545 RL	70	#include "cryptlib.h"
	71	#include <openssl/dso.h>
	72
	73	#ifndef VMS
	74	DSO_METHOD *DSO_METHOD_vms(void)
	75	{
	76	return NULL;
	77	}
	78	#else
	79	#pragma message disable DOLLARID
	80
51c8dc37	81	static int vms_load(DSO *dso);
0e05f545 RL	82	static int vms_unload(DSO *dso);
	83	static void vms_bind_var(DSO dso, const char *symname);
	84	static DSO_FUNC_TYPE vms_bind_func(DSO dso, const char symname);
	85	#if 0
	86	static int vms_unbind_var(DSO dso, char symname, void *symptr);
	87	static int vms_unbind_func(DSO dso, char symname, DSO_FUNC_TYPE symptr);
	88	static int vms_init(DSO *dso);
	89	static int vms_finish(DSO *dso);
0e05f545	90	static long vms_ctrl(DSO dso, int cmd, long larg, void parg);
75a382bd	91	#endif
51c8dc37	92	static char vms_name_converter(DSO dso);
0e05f545 RL	93
	94	static DSO_METHOD dso_meth_vms = {
	95	"OpenSSL 'VMS' shared library method",
	96	vms_load,
	97	NULL, /* unload */
	98	vms_bind_var,
	99	vms_bind_func,
	100	/* For now, "unbind" doesn't exist */
	101	#if 0
	102	NULL, /* unbind_var */
	103	NULL, /* unbind_func */
	104	#endif
75a382bd	105	NULL, /* ctrl */
51c8dc37	106	vms_name_converter,
0e05f545 RL	107	NULL, /* init */
	108	NULL /* finish */
	109	};
	110
	111	/* On VMS, the only "handle" is the file name. LIB$FIND_IMAGE_SYMBOL depends
	112	* on the reference to the file name being the same for all calls regarding
	113	* one shared image, so we'll just store it in an instance of the following
	114	* structure and put a pointer to that instance in the meth_data stack.
	115	*/
	116	typedef struct dso_internal_st
	117	{
	118	/* This should contain the name only, no directory,
	119	* no extension, nothing but a name. */
	120	struct dsc$descriptor_s filename_dsc;
	121	char filename[FILENAME_MAX+1];
	122	/* This contains whatever is not in filename, if needed.
	123	* Normally not defined. */
	124	struct dsc$descriptor_s imagename_dsc;
	125	char imagename[FILENAME_MAX+1];
	126	} DSO_VMS_INTERNAL;
	127
	128
	129	DSO_METHOD *DSO_METHOD_vms(void)
	130	{
	131	return(&dso_meth_vms);
	132	}
	133
51c8dc37	134	static int vms_load(DSO *dso)
0e05f545	135	{
51c8dc37	136	#if 0
0e05f545 RL	137	DSO_VMS_INTERNAL *p;
	138	const char sp1, sp2; /* Search result */
	139
	140	/* A file specification may look like this:
	141	*
	142	* node::dev:[dir-spec]name.type;ver
	143	*
	144	* or (for compatibility with TOPS-20):
	145	*
	146	* node::dev:<dir-spec>name.type;ver
	147	*
	148	* and the dir-spec uses '.' as separator. Also, a dir-spec
	149	* may consist of several parts, with mixed use of [] and <>:
	150	*
	151	* [dir1.]<dir2>
	152	*
	153	* We need to split the file specification into the name and
	154	* the rest (both before and after the name itself).
	155	*/
	156	/* Start with trying to find the end of a dir-spec, and save the
	157	position of the byte after in sp1 */
	158	sp1 = strrchr(filename, ']');
	159	sp2 = strrchr(filename, '>');
	160	if (sp1 == NULL) sp1 = sp2;
	161	if (sp2 != NULL && sp2 > sp1) sp1 = sp2;
	162	if (sp1 == NULL) sp1 = strrchr(filename, ':');
	163	if (sp1 == NULL)
	164	sp1 = filename;
	165	else
	166	sp1++; /* The byte after the found character */
	167	/* Now, let's see if there's a type, and save the position in sp2 */
	168	sp2 = strchr(sp1, '.');
	169	/* If we found it, that's where we'll cut. Otherwise, look for a
	170	version number and save the position in sp2 */
	171	if (sp2 == NULL) sp2 = strchr(sp1, ';');
	172	/* If there was still nothing to find, set sp2 to point at the end of
	173	the string */
	174	if (sp2 == NULL) sp2 = sp1 + strlen(sp1);
	175
	176	/* Check that we won't get buffer overflows */
	177	if (sp2 - sp1 > FILENAME_MAX
	178	\|\| (sp1 - filename) + strlen(sp2) > FILENAME_MAX)
	179	{
	180	DSOerr(DSO_F_VMS_LOAD,DSO_R_FILENAME_TOO_BIG);
	181	return(0);
	182	}
	183
	184	p = (DSO_VMS_INTERNAL *)OPENSSL_malloc(sizeof(DSO_VMS_INTERNAL));
	185	if(p == NULL)
	186	{
	187	DSOerr(DSO_F_VMS_LOAD,ERR_R_MALLOC_FAILURE);
	188	return(0);
	189	}
	190
	191	strncpy(p->filename, sp1, sp2-sp1);
	192	p->filename[sp2-sp1] = '\0';
	193
	194	strncpy(p->imagename, filename, sp1-filename);
	195	p->imagename[sp1-filename] = '\0';
	196	strcat(p->imagename, sp2);
	197
	198	p->filename_dsc.dsc$w_length = strlen(p->filename);
	199	p->filename_dsc.dsc$b_dtype = DSC$K_DTYPE_T;
	200	p->filename_dsc.dsc$b_class = DSC$K_CLASS_S;
201	p->filename_dsc.dsc$a_pointer = p->filename;
202	p->imagename_dsc.dsc$w_length = strlen(p->imagename);
203	p->imagename_dsc.dsc$b_dtype = DSC$K_DTYPE_T;
204	p->imagename_dsc.dsc$b_class = DSC$K_CLASS_S;
205	p->imagename_dsc.dsc$a_pointer = p->imagename;
206
207	if(!sk_push(dso->meth_data, (char *)p))
208	{
209	DSOerr(DSO_F_VMS_LOAD,DSO_R_STACK_ERROR);
210	OPENSSL_free(p);
211	return(0);
212	}
213	return(1);
51c8dc37 GT	214	#else
	215	/* See the comments lower down in the vms_name_converter
	216	* "implementation" :-) */
	217	please_break_compilation();
	218	return(bother_richard);
	219	#endif
0e05f545 RL	220	}
	221
	222	/* Note that this doesn't actually unload the shared image, as there is no
	223	* such thing in VMS. Next time it get loaded again, a new copy will
	224	* actually be loaded.
	225	*/
	226	static int vms_unload(DSO *dso)
	227	{
	228	DSO_VMS_INTERNAL *p;
	229	if(dso == NULL)
	230	{
	231	DSOerr(DSO_F_VMS_UNLOAD,ERR_R_PASSED_NULL_PARAMETER);
	232	return(0);
	233	}
	234	if(sk_num(dso->meth_data) < 1)
	235	return(1);
	236	p = (DSO_VMS_INTERNAL *)sk_pop(dso->meth_data);
	237	if(p == NULL)
	238	{
	239	DSOerr(DSO_F_VMS_UNLOAD,DSO_R_NULL_HANDLE);
	240	return(0);
	241	}
	242	/* Cleanup */
	243	OPENSSL_free(p);
	244	return(1);
	245	}
	246
	247	/* We must do this in a separate function because of the way the exception
	248	handler works (it makes this function return */
	249	static int do_find_symbol(DSO_VMS_INTERNAL *ptr,
	250	struct dsc$descriptor_s symname_dsc, void *sym,
	251	unsigned long flags)
	252	{
	253	/* Make sure that signals are caught and returned instead of
	254	aborting the program. The exception handler gets unestablished
	255	automatically on return from this function. */
	256	lib$establish(lib$sig_to_ret);
	257
	258	if(ptr->imagename_dsc.dsc$w_length)
	259	return lib$find_image_symbol(&ptr->filename_dsc,
	260	symname_dsc, sym,
	261	&ptr->imagename_dsc, flags);
	262	else
	263	return lib$find_image_symbol(&ptr->filename_dsc,
	264	symname_dsc, sym,
	265	0, flags);
	266	}
	267
3aa477f6	268	void vms_bind_sym(DSO dso, const char symname, void **sym)
0e05f545 RL	269	{
0e05f545 RL	270	DSO_VMS_INTERNAL *ptr;
0e05f545 RL	271	int status;
	272	int flags = LIB$M_FIS_MIXEDCASE;
	273	struct dsc$descriptor_s symname_dsc;
3aa477f6	274	*sym = NULL;
0e05f545 RL	275
	276	symname_dsc.dsc$w_length = strlen(symname);
	277	symname_dsc.dsc$b_dtype = DSC$K_DTYPE_T;
	278	symname_dsc.dsc$b_class = DSC$K_CLASS_S;
	279	symname_dsc.dsc$a_pointer = (char )symname; / The cast is needed */
	280
	281	if((dso == NULL) \|\| (symname == NULL))
	282	{
	283	DSOerr(DSO_F_VMS_BIND_VAR,ERR_R_PASSED_NULL_PARAMETER);
3aa477f6	284	return;
0e05f545 RL	285	}
	286	if(sk_num(dso->meth_data) < 1)
	287	{
	288	DSOerr(DSO_F_VMS_BIND_VAR,DSO_R_STACK_ERROR);
3aa477f6	289	return;
0e05f545 RL	290	}
	291	ptr = (DSO_VMS_INTERNAL *)sk_value(dso->meth_data,
	292	sk_num(dso->meth_data) - 1);
	293	if(ptr == NULL)
	294	{
	295	DSOerr(DSO_F_VMS_BIND_VAR,DSO_R_NULL_HANDLE);
3aa477f6	296	return;
0e05f545 RL	297	}
	298
	299	if(dso->flags & DSO_FLAG_UPCASE_SYMBOL) flags = 0;
	300
3aa477f6	301	status = do_find_symbol(ptr, &symname_dsc, sym, flags);
0e05f545 RL	302
	303	if(!$VMS_STATUS_SUCCESS(status))
	304	{
	305	unsigned short length;
	306	char errstring[257];
	307	struct dsc$descriptor_s errstring_dsc;
	308
	309	errstring_dsc.dsc$w_length = sizeof(errstring);
	310	errstring_dsc.dsc$b_dtype = DSC$K_DTYPE_T;
	311	errstring_dsc.dsc$b_class = DSC$K_CLASS_S;
	312	errstring_dsc.dsc$a_pointer = errstring;
	313
3aa477f6 RL	314	*sym = NULL;
3aa477f6 RL	315
0e05f545 RL	316	status = sys$getmsg(status, &length, &errstring_dsc, 1, 0);
	317
	318	if (!$VMS_STATUS_SUCCESS(status))
	319	lib$signal(status); /* This is really bad. Abort! */
	320	else
	321	{
	322	errstring[length] = '\0';
	323
	324	DSOerr(DSO_F_VMS_BIND_VAR,DSO_R_SYM_FAILURE);
	325	if (ptr->imagename_dsc.dsc$w_length)
	326	ERR_add_error_data(9,
	327	"Symbol ", symname,
	328	" in ", ptr->filename,
	329	" (", ptr->imagename, ")",
	330	": ", errstring);
	331	else
	332	ERR_add_error_data(6,
	333	"Symbol ", symname,
	334	" in ", ptr->filename,
	335	": ", errstring);
	336	}
3aa477f6	337	return;
0e05f545	338	}
3aa477f6	339	return;
0e05f545 RL	340	}
	341
	342	static void vms_bind_var(DSO dso, const char *symname)
	343	{
3aa477f6 RL	344	void *sym = 0;
	345	vms_bind_sym(dso, symname, &sym);
	346	return sym;
0e05f545 RL	347	}
	348
	349	static DSO_FUNC_TYPE vms_bind_func(DSO dso, const char symname)
	350	{
3aa477f6	351	DSO_FUNC_TYPE sym = 0;
4534fb1c	352	vms_bind_sym(dso, symname, (void **)&sym);
3aa477f6	353	return sym;
0e05f545 RL	354	}
0e05f545 RL	355
51c8dc37 GT	356	static char vms_name_converter(DSO dso)
	357	{
	358	/* Implementation note: on VMS is it preferable to do real conversions
	359	* here, or to actually have it performed in-line with the bind calls
	360	* (given that VMS never actually does a load except implicitly within
	361	* the bind functions). Another note: normally (eg. dlfcn), the
	362	* DSO_load call will either load, put the loaded filename into the DSO
	363	* (which marks it effectively as "read-only"), and return success - or
	364	* it will fail. VMS needs to work out what to do - otherwise DSO_load
	365	* will always succeed, but leave the DSO looking unloaded (because the
	366	* loaded_filename will be NULL still) and then real loading (and
	367	* setting of loaded_filename) will only happen during the first bind
	368	* call (which should have error checking anyway to prevent you calling
	369	* it on an "unloaded" DSO - thus giving VMS serious grief). Richard,
	370	* what do you think? Is it worth having DSO_load() try to find and pin
	371	* itself to a library file (and populate loaded_filename) even though
	372	* it's unecessary to actually do a load prior to the first bind call?
	373	* I leave it to you ... :-) */
	374	deliberately_break_compilation_here();
	375	return(1);
	376	}
	377
0e05f545	378	#endif /* VMS */