crypto/LPdir_vms.c

   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
  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
 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 }