crypto/LPdir_vms.c

   1 /* $LP: LPlib/source/LPdir_vms.c,v 1.20 2004/08/26 13:36:05 _cvs_levitte Exp $ */
   2 /*
   3  * Copyright (c) 2004, Richard Levitte <richard@levitte.org>
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  16  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  17  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  18  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  19  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  20  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  21  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  25  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26  */
  27
  28 #include <stddef.h>
  29 #include <stdlib.h>
  30 #include <string.h>
  31 #include <errno.h>
  32 #include <descrip.h>
  33 #include <namdef.h>
  34 #include <rmsdef.h>
  35 #include <libfildef.h>
  36 #include <lib$routines.h>
  37 #include <strdef.h>
  38 #include <str$routines.h>
  39 #include <stsdef.h>
  40 #ifndef LPDIR_H
  41 #include "LPdir.h"
  42 #endif
  43 #include "vms_rms.h"
  44
  45 /* Some compiler options hide EVMSERR. */
  46 #ifndef EVMSERR
  47 # define EVMSERR        65535  /* error for non-translatable VMS errors */
  48 #endif
  49
  50 struct LP_dir_context_st
  51 {
  52   unsigned long VMS_context;
  53   char filespec[ NAMX_MAXRSS+ 1];
  54   char result[ NAMX_MAXRSS+ 1];
  55   struct dsc$descriptor_d filespec_dsc;
  56   struct dsc$descriptor_d result_dsc;
  57 };
  58
  59 const char *LP_find_file(LP_DIR_CTX **ctx, const char *directory)
  60 {
  61   int status;
  62   char *p, *r;
  63   size_t l;
  64   unsigned long flags = 0;
  65
  66 /* Arrange 32-bit pointer to (copied) string storage, if needed. */
  67 #if __INITIAL_POINTER_SIZE == 64
  68 # pragma pointer_size save
  69 # pragma pointer_size 32
  70         char *ctx_filespec_32p;
  71 # pragma pointer_size restore
  72         char ctx_filespec_32[ NAMX_MAXRSS+ 1];
  73 #endif /* __INITIAL_POINTER_SIZE == 64 */
  74
  75 #ifdef NAML$C_MAXRSS
  76   flags |= LIB$M_FIL_LONG_NAMES;
  77 #endif
  78
  79   if (ctx == NULL || directory == NULL)
  80     {
  81       errno = EINVAL;
  82       return 0;
  83     }
  84
  85   errno = 0;
  86   if (*ctx == NULL)
  87     {
  88       size_t filespeclen = strlen(directory);
  89       char *filespec = NULL;
  90
  91       /* MUST be a VMS directory specification!  Let's estimate if it is. */
  92       if (directory[filespeclen-1] != ']'
  93           && directory[filespeclen-1] != '>'
  94           && directory[filespeclen-1] != ':')
  95         {
  96           errno = EINVAL;
  97           return 0;
  98         }
  99
 100       filespeclen += 4;         /* "*.*;" */
 101
 102       if (filespeclen > NAMX_MAXRSS)
 103         {
 104           errno = ENAMETOOLONG;
 105           return 0;
 106         }
 107
 108       *ctx = (LP_DIR_CTX *)malloc(sizeof(LP_DIR_CTX));
 109       if (*ctx == NULL)
 110         {
 111           errno = ENOMEM;
 112           return 0;
 113         }
 114       memset(*ctx, '\0', sizeof(LP_DIR_CTX));
 115
 116       strcpy((*ctx)->filespec,directory);
 117       strcat((*ctx)->filespec,"*.*;");
 118
 119 /* Arrange 32-bit pointer to (copied) string storage, if needed. */
 120 #if __INITIAL_POINTER_SIZE == 64
 121 # define CTX_FILESPEC ctx_filespec_32p
 122         /* Copy the file name to storage with a 32-bit pointer. */
 123         ctx_filespec_32p = ctx_filespec_32;
 124         strcpy( ctx_filespec_32p, (*ctx)->filespec);
 125 #else /* __INITIAL_POINTER_SIZE == 64 */
 126 # define CTX_FILESPEC (*ctx)->filespec
 127 #endif /* __INITIAL_POINTER_SIZE == 64 [else] */
 128
 129       (*ctx)->filespec_dsc.dsc$w_length = filespeclen;
 130       (*ctx)->filespec_dsc.dsc$b_dtype = DSC$K_DTYPE_T;
 131       (*ctx)->filespec_dsc.dsc$b_class = DSC$K_CLASS_S;
 132       (*ctx)->filespec_dsc.dsc$a_pointer = CTX_FILESPEC;
 133     }
 134
 135   (*ctx)->result_dsc.dsc$w_length = 0;
 136   (*ctx)->result_dsc.dsc$b_dtype = DSC$K_DTYPE_T;
 137   (*ctx)->result_dsc.dsc$b_class = DSC$K_CLASS_D;
 138   (*ctx)->result_dsc.dsc$a_pointer = 0;
 139
 140   status = lib$find_file(&(*ctx)->filespec_dsc, &(*ctx)->result_dsc,
 141                          &(*ctx)->VMS_context, 0, 0, 0, &flags);
 142
 143   if (status == RMS$_NMF)
 144     {
 145       errno = 0;
 146       vaxc$errno = status;
 147       return NULL;
 148     }
 149
 150   if(!$VMS_STATUS_SUCCESS(status))
 151     {
 152       errno = EVMSERR;
 153       vaxc$errno = status;
 154       return NULL;
 155     }
 156
 157   /* Quick, cheap and dirty way to discard any device and directory,
 158      since we only want file names */
 159   l = (*ctx)->result_dsc.dsc$w_length;
 160   p = (*ctx)->result_dsc.dsc$a_pointer;
 161   r = p;
 162   for (; *p; p++)
 163     {
 164       if (*p == '^' && p[1] != '\0') /* Take care of ODS-5 escapes */
 165         {
 166           p++;
 167         }
 168       else if (*p == ':' || *p == '>' || *p == ']')
 169         {
 170           l -= p + 1 - r;
 171           r = p + 1;
 172         }
 173       else if (*p == ';')
 174         {
 175           l = p - r;
 176           break;
 177         }
 178     }
 179
 180   strncpy((*ctx)->result, r, l);
 181   (*ctx)->result[l] = '\0';
 182   str$free1_dx(&(*ctx)->result_dsc);
 183
 184   return (*ctx)->result;
 185 }
 186
 187 int LP_find_file_end(LP_DIR_CTX **ctx)
 188 {
 189   if (ctx != NULL && *ctx != NULL)
 190     {
 191       int status = lib$find_file_end(&(*ctx)->VMS_context);
 192
 193       free(*ctx);
 194
 195       if(!$VMS_STATUS_SUCCESS(status))
 196         {
 197           errno = EVMSERR;
 198           vaxc$errno = status;
 199           return 0;
 200         }
 201       return 1;
 202     }
 203   errno = EINVAL;
 204   return 0;
 205 }
 206