xref: /openssl/crypto/LPdir_vms.c (revision 0e9725bc)
1 /*
2  * Copyright 2004-2016 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 /*
11  * This file is dual-licensed and is also available under the following
12  * terms:
13  *
14  * Copyright (c) 2004, Richard Levitte <richard@levitte.org>
15  * All rights reserved.
16  *
17  * Redistribution and use in source and binary forms, with or without
18  * modification, are permitted provided that the following conditions
19  * are met:
20  * 1. Redistributions of source code must retain the above copyright
21  *    notice, this list of conditions and the following disclaimer.
22  * 2. Redistributions in binary form must reproduce the above copyright
23  *    notice, this list of conditions and the following disclaimer in the
24  *    documentation and/or other materials provided with the distribution.
25  *
26  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
28  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
29  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
30  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
31  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
32  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
33  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
34  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
35  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
36  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
37  */
38 
39 #include <stddef.h>
40 #include <stdlib.h>
41 #include <string.h>
42 #include <errno.h>
43 #include <descrip.h>
44 #include <namdef.h>
45 #include <rmsdef.h>
46 #include <libfildef.h>
47 #include <lib$routines.h>
48 #include <strdef.h>
49 #include <str$routines.h>
50 #include <stsdef.h>
51 #ifndef LPDIR_H
52 # include "LPdir.h"
53 #endif
54 #include "vms_rms.h"
55 
56 /* Some compiler options hide EVMSERR. */
57 #ifndef EVMSERR
58 # define EVMSERR        65535   /* error for non-translatable VMS errors */
59 #endif
60 
61 struct LP_dir_context_st {
62     unsigned long VMS_context;
63     char filespec[NAMX_MAXRSS + 1];
64     char result[NAMX_MAXRSS + 1];
65     struct dsc$descriptor_d filespec_dsc;
66     struct dsc$descriptor_d result_dsc;
67 };
68 
LP_find_file(LP_DIR_CTX ** ctx,const char * directory)69 const char *LP_find_file(LP_DIR_CTX **ctx, const char *directory)
70 {
71     int status;
72     char *p, *r;
73     size_t l;
74     unsigned long flags = 0;
75 
76 /* Arrange 32-bit pointer to (copied) string storage, if needed. */
77 #if __INITIAL_POINTER_SIZE == 64
78 # pragma pointer_size save
79 # pragma pointer_size 32
80     char *ctx_filespec_32p;
81 # pragma pointer_size restore
82     char ctx_filespec_32[NAMX_MAXRSS + 1];
83 #endif                          /* __INITIAL_POINTER_SIZE == 64 */
84 
85 #ifdef NAML$C_MAXRSS
86     flags |= LIB$M_FIL_LONG_NAMES;
87 #endif
88 
89     if (ctx == NULL || directory == NULL) {
90         errno = EINVAL;
91         return 0;
92     }
93 
94     errno = 0;
95     if (*ctx == NULL) {
96         size_t filespeclen = strlen(directory);
97         char *filespec = NULL;
98 
99         if (filespeclen == 0) {
100             errno = ENOENT;
101             return 0;
102         }
103 
104         /* MUST be a VMS directory specification!  Let's estimate if it is. */
105         if (directory[filespeclen - 1] != ']'
106             && directory[filespeclen - 1] != '>'
107             && directory[filespeclen - 1] != ':') {
108             errno = EINVAL;
109             return 0;
110         }
111 
112         filespeclen += 4;       /* "*.*;" */
113 
114         if (filespeclen > NAMX_MAXRSS) {
115             errno = ENAMETOOLONG;
116             return 0;
117         }
118 
119         *ctx = malloc(sizeof(**ctx));
120         if (*ctx == NULL) {
121             errno = ENOMEM;
122             return 0;
123         }
124         memset(*ctx, 0, sizeof(**ctx));
125 
126         strcpy((*ctx)->filespec, directory);
127         strcat((*ctx)->filespec, "*.*;");
128 
129 /* Arrange 32-bit pointer to (copied) string storage, if needed. */
130 #if __INITIAL_POINTER_SIZE == 64
131 # define CTX_FILESPEC ctx_filespec_32p
132         /* Copy the file name to storage with a 32-bit pointer. */
133         ctx_filespec_32p = ctx_filespec_32;
134         strcpy(ctx_filespec_32p, (*ctx)->filespec);
135 #else                           /* __INITIAL_POINTER_SIZE == 64 */
136 # define CTX_FILESPEC (*ctx)->filespec
137 #endif                          /* __INITIAL_POINTER_SIZE == 64 [else] */
138 
139         (*ctx)->filespec_dsc.dsc$w_length = filespeclen;
140         (*ctx)->filespec_dsc.dsc$b_dtype = DSC$K_DTYPE_T;
141         (*ctx)->filespec_dsc.dsc$b_class = DSC$K_CLASS_S;
142         (*ctx)->filespec_dsc.dsc$a_pointer = CTX_FILESPEC;
143     }
144 
145     (*ctx)->result_dsc.dsc$w_length = 0;
146     (*ctx)->result_dsc.dsc$b_dtype = DSC$K_DTYPE_T;
147     (*ctx)->result_dsc.dsc$b_class = DSC$K_CLASS_D;
148     (*ctx)->result_dsc.dsc$a_pointer = 0;
149 
150     status = lib$find_file(&(*ctx)->filespec_dsc, &(*ctx)->result_dsc,
151                            &(*ctx)->VMS_context, 0, 0, 0, &flags);
152 
153     if (status == RMS$_NMF) {
154         errno = 0;
155         vaxc$errno = status;
156         return NULL;
157     }
158 
159     if (!$VMS_STATUS_SUCCESS(status)) {
160         errno = EVMSERR;
161         vaxc$errno = status;
162         return NULL;
163     }
164 
165     /*
166      * Quick, cheap and dirty way to discard any device and directory, since
167      * we only want file names
168      */
169     l = (*ctx)->result_dsc.dsc$w_length;
170     p = (*ctx)->result_dsc.dsc$a_pointer;
171     r = p;
172     for (; *p; p++) {
173         if (*p == '^' && p[1] != '\0') { /* Take care of ODS-5 escapes */
174             p++;
175         } else if (*p == ':' || *p == '>' || *p == ']') {
176             l -= p + 1 - r;
177             r = p + 1;
178         } else if (*p == ';') {
179             l = p - r;
180             break;
181         }
182     }
183 
184     strncpy((*ctx)->result, r, l);
185     (*ctx)->result[l] = '\0';
186     str$free1_dx(&(*ctx)->result_dsc);
187 
188     return (*ctx)->result;
189 }
190 
LP_find_file_end(LP_DIR_CTX ** ctx)191 int LP_find_file_end(LP_DIR_CTX **ctx)
192 {
193     if (ctx != NULL && *ctx != NULL) {
194         int status = lib$find_file_end(&(*ctx)->VMS_context);
195 
196         free(*ctx);
197 
198         if (!$VMS_STATUS_SUCCESS(status)) {
199             errno = EVMSERR;
200             vaxc$errno = status;
201             return 0;
202         }
203         return 1;
204     }
205     errno = EINVAL;
206     return 0;
207 }
208