1/*
2 * Copyright 2010-2016 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#if defined( __VMS) && !defined( OPENSSL_NO_DECC_INIT) && \
11 defined( __DECC) && !defined( __VAX) && (__CRTL_VER >= 70301000)
12# define USE_DECC_INIT 1
13#endif
14
15#ifdef USE_DECC_INIT
16
17/*
18 * ----------------------------------------------------------------------
19 * decc_init() On non-VAX systems, uses LIB$INITIALIZE to set a collection
20 * of C RTL features without using the DECC$* logical name method.
21 * ----------------------------------------------------------------------
22 */
23
24# include <stdio.h>
25# include <stdlib.h>
26# include <unixlib.h>
27
28/* Global storage. */
29
30/* Flag to sense if decc_init() was called. */
31
32int decc_init_done = -1;
33
34/* Structure to hold a DECC$* feature name and its desired value. */
35
36typedef struct {
37    char *name;
38    int value;
39} decc_feat_t;
40
41/*
42 * Array of DECC$* feature names and their desired values. Note:
43 * DECC$ARGV_PARSE_STYLE is the urgent one.
44 */
45
46decc_feat_t decc_feat_array[] = {
47    /* Preserve command-line case with SET PROCESS/PARSE_STYLE=EXTENDED */
48    {"DECC$ARGV_PARSE_STYLE", 1},
49
50    /* Preserve case for file names on ODS5 disks. */
51    {"DECC$EFS_CASE_PRESERVE", 1},
52
53    /*
54     * Enable multiple dots (and most characters) in ODS5 file names, while
55     * preserving VMS-ness of ";version".
56     */
57    {"DECC$EFS_CHARSET", 1},
58
59    /* List terminator. */
60    {(char *)NULL, 0}
61};
62
63
64/* LIB$INITIALIZE initialization function. */
65
66static void decc_init(void)
67{
68    char *openssl_debug_decc_init;
69    int verbose = 0;
70    int feat_index;
71    int feat_value;
72    int feat_value_max;
73    int feat_value_min;
74    int i;
75    int sts;
76
77    /* Get debug option. */
78    openssl_debug_decc_init = getenv("OPENSSL_DEBUG_DECC_INIT");
79    if (openssl_debug_decc_init != NULL) {
80        verbose = strtol(openssl_debug_decc_init, NULL, 10);
81        if (verbose <= 0) {
82            verbose = 1;
83        }
84    }
85
86    /* Set the global flag to indicate that LIB$INITIALIZE worked. */
87    decc_init_done = 1;
88
89    /* Loop through all items in the decc_feat_array[]. */
90
91    for (i = 0; decc_feat_array[i].name != NULL; i++) {
92        /* Get the feature index. */
93        feat_index = decc$feature_get_index(decc_feat_array[i].name);
94        if (feat_index >= 0) {
95            /* Valid item.  Collect its properties. */
96            feat_value = decc$feature_get_value(feat_index, 1);
97            feat_value_min = decc$feature_get_value(feat_index, 2);
98            feat_value_max = decc$feature_get_value(feat_index, 3);
99
100            /* Check the validity of our desired value. */
101            if ((decc_feat_array[i].value >= feat_value_min) &&
102                (decc_feat_array[i].value <= feat_value_max)) {
103                /* Valid value.  Set it if necessary. */
104                if (feat_value != decc_feat_array[i].value) {
105                    sts = decc$feature_set_value(feat_index,
106                                                 1, decc_feat_array[i].value);
107
108                    if (verbose > 1) {
109                        fprintf(stderr, " %s = %d, sts = %d.\n",
110                                decc_feat_array[i].name,
111                                decc_feat_array[i].value, sts);
112                    }
113                }
114            } else {
115                /* Invalid DECC feature value. */
116                fprintf(stderr,
117                        " INVALID DECC$FEATURE VALUE, %d: %d <= %s <= %d.\n",
118                        feat_value,
119                        feat_value_min, decc_feat_array[i].name,
120                        feat_value_max);
121            }
122        } else {
123            /* Invalid DECC feature name. */
124            fprintf(stderr,
125                    " UNKNOWN DECC$FEATURE: %s.\n", decc_feat_array[i].name);
126        }
127    }
128
129    if (verbose > 0) {
130        fprintf(stderr, " DECC_INIT complete.\n");
131    }
132}
133
134/* Get "decc_init()" into a valid, loaded LIB$INITIALIZE PSECT. */
135
136# pragma nostandard
137
138/*
139 * Establish the LIB$INITIALIZE PSECTs, with proper alignment and other
140 * attributes.  Note that "nopic" is significant only on VAX.
141 */
142# pragma extern_model save
143
144# if __INITIAL_POINTER_SIZE == 64
145#  define PSECT_ALIGN 3
146# else
147#  define PSECT_ALIGN 2
148# endif
149
150# pragma extern_model strict_refdef "LIB$INITIALIZ" PSECT_ALIGN, nopic, nowrt
151const int spare[8] = { 0 };
152
153# pragma extern_model strict_refdef "LIB$INITIALIZE" PSECT_ALIGN, nopic, nowrt
154void (*const x_decc_init) () = decc_init;
155
156# pragma extern_model restore
157
158/* Fake reference to ensure loading the LIB$INITIALIZE PSECT. */
159
160# pragma extern_model save
161
162int LIB$INITIALIZE(void);
163
164# pragma extern_model strict_refdef
165int dmy_lib$initialize = (int)LIB$INITIALIZE;
166
167# pragma extern_model restore
168
169# pragma standard
170
171#else                           /* def USE_DECC_INIT */
172
173/* Dummy code to avoid a %CC-W-EMPTYFILE complaint. */
174int decc_init_dummy(void);
175
176#endif                          /* def USE_DECC_INIT */
177