sl@0: /* $LP: LPlib/source/LPdir_vms.c,v 1.20 2004/08/26 13:36:05 _cvs_levitte Exp $ */
sl@0: /*
sl@0:  * Copyright (c) 2004, Richard Levitte <richard@levitte.org>
sl@0:  * All rights reserved.
sl@0:  *
sl@0:  * Redistribution and use in source and binary forms, with or without
sl@0:  * modification, are permitted provided that the following conditions
sl@0:  * are met:
sl@0:  * 1. Redistributions of source code must retain the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer.
sl@0:  * 2. Redistributions in binary form must reproduce the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer in the
sl@0:  *    documentation and/or other materials provided with the distribution.
sl@0:  * 
sl@0:  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
sl@0:  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
sl@0:  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
sl@0:  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
sl@0:  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
sl@0:  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
sl@0:  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
sl@0:  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
sl@0:  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
sl@0:  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
sl@0:  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
sl@0:  */
sl@0: 
sl@0: #include <stddef.h>
sl@0: #include <stdlib.h>
sl@0: #include <string.h>
sl@0: #include <errno.h>
sl@0: #include <descrip.h>
sl@0: #include <namdef.h>
sl@0: #include <rmsdef.h>
sl@0: #include <libfildef.h>
sl@0: #include <lib$routines.h>
sl@0: #include <strdef.h>
sl@0: #include <str$routines.h>
sl@0: #include <stsdef.h>
sl@0: #ifndef LPDIR_H
sl@0: #include "LPdir.h"
sl@0: #endif
sl@0: 
sl@0: /* Because some compiler options hide this macor */
sl@0: #ifndef EVMSERR
sl@0: #define EVMSERR		65535  /* error for non-translatable VMS errors */
sl@0: #endif
sl@0: 
sl@0: struct LP_dir_context_st
sl@0: {
sl@0:   unsigned long VMS_context;
sl@0: #ifdef NAML$C_MAXRSS
sl@0:   char filespec[NAML$C_MAXRSS+1];
sl@0:   char result[NAML$C_MAXRSS+1];
sl@0: #else
sl@0:   char filespec[256];
sl@0:   char result[256];
sl@0: #endif
sl@0:   struct dsc$descriptor_d filespec_dsc;
sl@0:   struct dsc$descriptor_d result_dsc;
sl@0: };
sl@0: 
sl@0: const char *LP_find_file(LP_DIR_CTX **ctx, const char *directory)
sl@0: {
sl@0:   int status;
sl@0:   char *p, *r;
sl@0:   size_t l;
sl@0:   unsigned long flags = 0;
sl@0: #ifdef NAML$C_MAXRSS
sl@0:   flags |= LIB$M_FIL_LONG_NAMES;
sl@0: #endif
sl@0: 
sl@0:   if (ctx == NULL || directory == NULL)
sl@0:     {
sl@0:       errno = EINVAL;
sl@0:       return 0;
sl@0:     }
sl@0: 
sl@0:   errno = 0;
sl@0:   if (*ctx == NULL)
sl@0:     {
sl@0:       size_t filespeclen = strlen(directory);
sl@0:       char *filespec = NULL;
sl@0: 
sl@0:       /* MUST be a VMS directory specification!  Let's estimate if it is. */
sl@0:       if (directory[filespeclen-1] != ']'
sl@0: 	  && directory[filespeclen-1] != '>'
sl@0: 	  && directory[filespeclen-1] != ':')
sl@0: 	{
sl@0: 	  errno = EINVAL;
sl@0: 	  return 0;
sl@0: 	}
sl@0: 
sl@0:       filespeclen += 4;		/* "*.*;" */
sl@0: 
sl@0:       if (filespeclen >
sl@0: #ifdef NAML$C_MAXRSS
sl@0: 	  NAML$C_MAXRSS
sl@0: #else
sl@0: 	  255
sl@0: #endif
sl@0: 	  )
sl@0: 	{
sl@0: 	  errno = ENAMETOOLONG;
sl@0: 	  return 0;
sl@0: 	}
sl@0: 
sl@0:       *ctx = (LP_DIR_CTX *)malloc(sizeof(LP_DIR_CTX));
sl@0:       if (*ctx == NULL)
sl@0: 	{
sl@0: 	  errno = ENOMEM;
sl@0: 	  return 0;
sl@0: 	}
sl@0:       memset(*ctx, '\0', sizeof(LP_DIR_CTX));
sl@0: 
sl@0:       strcpy((*ctx)->filespec,directory);
sl@0:       strcat((*ctx)->filespec,"*.*;");
sl@0:       (*ctx)->filespec_dsc.dsc$w_length = filespeclen;
sl@0:       (*ctx)->filespec_dsc.dsc$b_dtype = DSC$K_DTYPE_T;
sl@0:       (*ctx)->filespec_dsc.dsc$b_class = DSC$K_CLASS_S;
sl@0:       (*ctx)->filespec_dsc.dsc$a_pointer = (*ctx)->filespec;
sl@0:       (*ctx)->result_dsc.dsc$w_length = 0;
sl@0:       (*ctx)->result_dsc.dsc$b_dtype = DSC$K_DTYPE_T;
sl@0:       (*ctx)->result_dsc.dsc$b_class = DSC$K_CLASS_D;
sl@0:       (*ctx)->result_dsc.dsc$a_pointer = 0;
sl@0:     }
sl@0: 
sl@0:   (*ctx)->result_dsc.dsc$w_length = 0;
sl@0:   (*ctx)->result_dsc.dsc$b_dtype = DSC$K_DTYPE_T;
sl@0:   (*ctx)->result_dsc.dsc$b_class = DSC$K_CLASS_D;
sl@0:   (*ctx)->result_dsc.dsc$a_pointer = 0;
sl@0: 
sl@0:   status = lib$find_file(&(*ctx)->filespec_dsc, &(*ctx)->result_dsc,
sl@0: 			 &(*ctx)->VMS_context, 0, 0, 0, &flags);
sl@0: 
sl@0:   if (status == RMS$_NMF)
sl@0:     {
sl@0:       errno = 0;
sl@0:       vaxc$errno = status;
sl@0:       return NULL;
sl@0:     }
sl@0: 
sl@0:   if(!$VMS_STATUS_SUCCESS(status))
sl@0:     {
sl@0:       errno = EVMSERR;
sl@0:       vaxc$errno = status;
sl@0:       return NULL;
sl@0:     }
sl@0: 
sl@0:   /* Quick, cheap and dirty way to discard any device and directory,
sl@0:      since we only want file names */
sl@0:   l = (*ctx)->result_dsc.dsc$w_length;
sl@0:   p = (*ctx)->result_dsc.dsc$a_pointer;
sl@0:   r = p;
sl@0:   for (; *p; p++)
sl@0:     {
sl@0:       if (*p == '^' && p[1] != '\0') /* Take care of ODS-5 escapes */
sl@0: 	{
sl@0: 	  p++;
sl@0: 	}
sl@0:       else if (*p == ':' || *p == '>' || *p == ']')
sl@0: 	{
sl@0: 	  l -= p + 1 - r;
sl@0: 	  r = p + 1;
sl@0: 	}
sl@0:       else if (*p == ';')
sl@0: 	{
sl@0: 	  l = p - r;
sl@0: 	  break;
sl@0: 	}
sl@0:     }
sl@0: 
sl@0:   strncpy((*ctx)->result, r, l);
sl@0:   (*ctx)->result[l] = '\0';
sl@0:   str$free1_dx(&(*ctx)->result_dsc);
sl@0: 
sl@0:   return (*ctx)->result;
sl@0: }
sl@0: 
sl@0: int LP_find_file_end(LP_DIR_CTX **ctx)
sl@0: {
sl@0:   if (ctx != NULL && *ctx != NULL)
sl@0:     {
sl@0:       int status = lib$find_file_end(&(*ctx)->VMS_context);
sl@0: 
sl@0:       free(*ctx);
sl@0: 
sl@0:       if(!$VMS_STATUS_SUCCESS(status))
sl@0: 	{
sl@0: 	  errno = EVMSERR;
sl@0: 	  vaxc$errno = status;
sl@0: 	  return 0;
sl@0: 	}
sl@0:       return 1;
sl@0:     }
sl@0:   errno = EINVAL;
sl@0:   return 0;
sl@0: }
sl@0: