1 /*
2 * Copyright 2015-2021 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10 #include <stdlib.h>
11 #include <openssl/crypto.h>
12 #include "platform.h" /* for copy_argv() */
13
14 char **newargv = NULL;
15
cleanup_argv(void)16 static void cleanup_argv(void)
17 {
18 OPENSSL_free(newargv);
19 newargv = NULL;
20 }
21
copy_argv(int * argc,char * argv[])22 char **copy_argv(int *argc, char *argv[])
23 {
24 /*-
25 * The note below is for historical purpose. On VMS now we always
26 * copy argv "safely."
27 *
28 * 2011-03-22 SMS.
29 * If we have 32-bit pointers everywhere, then we're safe, and
30 * we bypass this mess, as on non-VMS systems.
31 * Problem 1: Compaq/HP C before V7.3 always used 32-bit
32 * pointers for argv[].
33 * Fix 1: For a 32-bit argv[], when we're using 64-bit pointers
34 * everywhere else, we always allocate and use a 64-bit
35 * duplicate of argv[].
36 * Problem 2: Compaq/HP C V7.3 (Alpha, IA64) before ECO1 failed
37 * to NULL-terminate a 64-bit argv[]. (As this was written, the
38 * compiler ECO was available only on IA64.)
39 * Fix 2: Unless advised not to (VMS_TRUST_ARGV), we test a
40 * 64-bit argv[argc] for NULL, and, if necessary, use a
41 * (properly) NULL-terminated (64-bit) duplicate of argv[].
42 * The same code is used in either case to duplicate argv[].
43 * Some of these decisions could be handled in preprocessing,
44 * but the code tends to get even uglier, and the penalty for
45 * deciding at compile- or run-time is tiny.
46 */
47
48 int i, count = *argc;
49 char **p = newargv;
50
51 cleanup_argv();
52
53 /*
54 * We purposefully use OPENSSL_malloc() rather than app_malloc() here,
55 * to avoid symbol name clashes in test programs that would otherwise
56 * get them when linking with all of libapps.a.
57 * See comment in test/build.info.
58 */
59 newargv = OPENSSL_malloc(sizeof(*newargv) * (count + 1));
60 if (newargv == NULL)
61 return NULL;
62
63 /* Register automatic cleanup on first use */
64 if (p == NULL)
65 OPENSSL_atexit(cleanup_argv);
66
67 for (i = 0; i < count; i++)
68 newargv[i] = argv[i];
69 newargv[i] = NULL;
70 *argc = i;
71 return newargv;
72 }
73