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/*
* Copyright 2015-2019 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <stdlib.h>
#include <openssl/crypto.h>
#include "platform.h" /* for copy_argv() */
char **newargv = NULL;
static void cleanup_argv(void)
{
OPENSSL_free(newargv);
newargv = NULL;
}
char **copy_argv(int *argc, char *argv[])
{
/*-
* The note below is for historical purpose. On VMS now we always
* copy argv "safely."
*
* 2011-03-22 SMS.
* If we have 32-bit pointers everywhere, then we're safe, and
* we bypass this mess, as on non-VMS systems.
* Problem 1: Compaq/HP C before V7.3 always used 32-bit
* pointers for argv[].
* Fix 1: For a 32-bit argv[], when we're using 64-bit pointers
* everywhere else, we always allocate and use a 64-bit
* duplicate of argv[].
* Problem 2: Compaq/HP C V7.3 (Alpha, IA64) before ECO1 failed
* to NULL-terminate a 64-bit argv[]. (As this was written, the
* compiler ECO was available only on IA64.)
* Fix 2: Unless advised not to (VMS_TRUST_ARGV), we test a
* 64-bit argv[argc] for NULL, and, if necessary, use a
* (properly) NULL-terminated (64-bit) duplicate of argv[].
* The same code is used in either case to duplicate argv[].
* Some of these decisions could be handled in preprocessing,
* but the code tends to get even uglier, and the penalty for
* deciding at compile- or run-time is tiny.
*/
int i, count = *argc;
char **p = newargv;
cleanup_argv();
/*
* We purposefully use OPENSSL_malloc() rather than app_malloc() here,
* to avoid symbol name clashes in test programs that would otherwise
* get them when linking with all of libapps.a.
* See comment in test/build.info.
*/
newargv = OPENSSL_malloc(sizeof(*newargv) * (count + 1));
if (newargv == NULL)
return NULL;
/* Register automatic cleanup on first use */
if (p == NULL)
OPENSSL_atexit(cleanup_argv);
for (i = 0; i < count; i++)
newargv[i] = argv[i];
newargv[i] = NULL;
*argc = i;
return newargv;
}
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