1/*
2 * Copyright (c) 2004, Richard Levitte <richard@levitte.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
15 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
16 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
17 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
18 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
19 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
20 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include <stddef.h>
28#include <stdlib.h>
29#include <string.h>
30#include <errno.h>
31#include <descrip.h>
32#include <namdef.h>
33#include <rmsdef.h>
34#include <libfildef.h>
35#include <lib$routines.h>
36#include <strdef.h>
37#include <str$routines.h>
38#include <stsdef.h>
39#ifndef LPDIR_H
40#include "LPdir.h"
41#endif
42#include "vms_rms.h"
43
44/* Some compiler options hide EVMSERR. */
45#ifndef EVMSERR
46# define EVMSERR	65535  /* error for non-translatable VMS errors */
47#endif
48
49struct LP_dir_context_st
50{
51  unsigned long VMS_context;
52  char filespec[ NAMX_MAXRSS+ 1];
53  char result[ NAMX_MAXRSS+ 1];
54  struct dsc$descriptor_d filespec_dsc;
55  struct dsc$descriptor_d result_dsc;
56};
57
58const char *LP_find_file(LP_DIR_CTX **ctx, const char *directory)
59{
60  int status;
61  char *p, *r;
62  size_t l;
63  unsigned long flags = 0;
64
65/* Arrange 32-bit pointer to (copied) string storage, if needed. */
66#if __INITIAL_POINTER_SIZE == 64
67# pragma pointer_size save
68# pragma pointer_size 32
69        char *ctx_filespec_32p;
70# pragma pointer_size restore
71        char ctx_filespec_32[ NAMX_MAXRSS+ 1];
72#endif /* __INITIAL_POINTER_SIZE == 64 */
73
74#ifdef NAML$C_MAXRSS
75  flags |= LIB$M_FIL_LONG_NAMES;
76#endif
77
78  if (ctx == NULL || directory == NULL)
79    {
80      errno = EINVAL;
81      return 0;
82    }
83
84  errno = 0;
85  if (*ctx == NULL)
86    {
87      size_t filespeclen = strlen(directory);
88      char *filespec = NULL;
89
90      if (filespeclen == 0)
91	{
92	  errno = ENOENT;
93	  return 0;
94	}
95
96      /* MUST be a VMS directory specification!  Let's estimate if it is. */
97      if (directory[filespeclen-1] != ']'
98	  && directory[filespeclen-1] != '>'
99	  && directory[filespeclen-1] != ':')
100	{
101	  errno = EINVAL;
102	  return 0;
103	}
104
105      filespeclen += 4;		/* "*.*;" */
106
107      if (filespeclen > NAMX_MAXRSS)
108	{
109	  errno = ENAMETOOLONG;
110	  return 0;
111	}
112
113      *ctx = (LP_DIR_CTX *)malloc(sizeof(LP_DIR_CTX));
114      if (*ctx == NULL)
115	{
116	  errno = ENOMEM;
117	  return 0;
118	}
119      memset(*ctx, '\0', sizeof(LP_DIR_CTX));
120
121      strcpy((*ctx)->filespec,directory);
122      strcat((*ctx)->filespec,"*.*;");
123
124/* Arrange 32-bit pointer to (copied) string storage, if needed. */
125#if __INITIAL_POINTER_SIZE == 64
126# define CTX_FILESPEC ctx_filespec_32p
127        /* Copy the file name to storage with a 32-bit pointer. */
128        ctx_filespec_32p = ctx_filespec_32;
129        strcpy( ctx_filespec_32p, (*ctx)->filespec);
130#else /* __INITIAL_POINTER_SIZE == 64 */
131# define CTX_FILESPEC (*ctx)->filespec
132#endif /* __INITIAL_POINTER_SIZE == 64 [else] */
133
134      (*ctx)->filespec_dsc.dsc$w_length = filespeclen;
135      (*ctx)->filespec_dsc.dsc$b_dtype = DSC$K_DTYPE_T;
136      (*ctx)->filespec_dsc.dsc$b_class = DSC$K_CLASS_S;
137      (*ctx)->filespec_dsc.dsc$a_pointer = CTX_FILESPEC;
138    }
139
140  (*ctx)->result_dsc.dsc$w_length = 0;
141  (*ctx)->result_dsc.dsc$b_dtype = DSC$K_DTYPE_T;
142  (*ctx)->result_dsc.dsc$b_class = DSC$K_CLASS_D;
143  (*ctx)->result_dsc.dsc$a_pointer = 0;
144
145  status = lib$find_file(&(*ctx)->filespec_dsc, &(*ctx)->result_dsc,
146			 &(*ctx)->VMS_context, 0, 0, 0, &flags);
147
148  if (status == RMS$_NMF)
149    {
150      errno = 0;
151      vaxc$errno = status;
152      return NULL;
153    }
154
155  if(!$VMS_STATUS_SUCCESS(status))
156    {
157      errno = EVMSERR;
158      vaxc$errno = status;
159      return NULL;
160    }
161
162  /* Quick, cheap and dirty way to discard any device and directory,
163     since we only want file names */
164  l = (*ctx)->result_dsc.dsc$w_length;
165  p = (*ctx)->result_dsc.dsc$a_pointer;
166  r = p;
167  for (; *p; p++)
168    {
169      if (*p == '^' && p[1] != '\0') /* Take care of ODS-5 escapes */
170	{
171	  p++;
172	}
173      else if (*p == ':' || *p == '>' || *p == ']')
174	{
175	  l -= p + 1 - r;
176	  r = p + 1;
177	}
178      else if (*p == ';')
179	{
180	  l = p - r;
181	  break;
182	}
183    }
184
185  strncpy((*ctx)->result, r, l);
186  (*ctx)->result[l] = '\0';
187  str$free1_dx(&(*ctx)->result_dsc);
188
189  return (*ctx)->result;
190}
191
192int LP_find_file_end(LP_DIR_CTX **ctx)
193{
194  if (ctx != NULL && *ctx != NULL)
195    {
196      int status = lib$find_file_end(&(*ctx)->VMS_context);
197
198      free(*ctx);
199
200      if(!$VMS_STATUS_SUCCESS(status))
201	{
202	  errno = EVMSERR;
203	  vaxc$errno = status;
204	  return 0;
205	}
206      return 1;
207    }
208  errno = EINVAL;
209  return 0;
210}
211
212