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/* $LP: LPlib/source/LPdir_vms.c,v 1.20 2004/08/26 13:36:05 _cvs_levitte Exp $ */
/*
* Copyright (c) 2004, Richard Levitte <richard@levitte.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <descrip.h>
#include <namdef.h>
#include <rmsdef.h>
#include <libfildef.h>
#include <lib$routines.h>
#include <strdef.h>
#include <str$routines.h>
#include <stsdef.h>
#ifndef LPDIR_H
#include "LPdir.h"
#endif
#include "vms_rms.h"
/* Some compiler options hide EVMSERR. */
#ifndef EVMSERR
# define EVMSERR 65535 /* error for non-translatable VMS errors */
#endif
struct LP_dir_context_st
{
unsigned long VMS_context;
char filespec[ NAMX_MAXRSS+ 1];
char result[ NAMX_MAXRSS+ 1];
struct dsc$descriptor_d filespec_dsc;
struct dsc$descriptor_d result_dsc;
};
const char *LP_find_file(LP_DIR_CTX **ctx, const char *directory)
{
int status;
char *p, *r;
size_t l;
unsigned long flags = 0;
/* Arrange 32-bit pointer to (copied) string storage, if needed. */
#if __INITIAL_POINTER_SIZE == 64
# pragma pointer_size save
# pragma pointer_size 32
char *ctx_filespec_32p;
# pragma pointer_size restore
char ctx_filespec_32[ NAMX_MAXRSS+ 1];
#endif /* __INITIAL_POINTER_SIZE == 64 */
#ifdef NAML$C_MAXRSS
flags |= LIB$M_FIL_LONG_NAMES;
#endif
if (ctx == NULL || directory == NULL)
{
errno = EINVAL;
return 0;
}
errno = 0;
if (*ctx == NULL)
{
size_t filespeclen = strlen(directory);
char *filespec = NULL;
/* MUST be a VMS directory specification! Let's estimate if it is. */
if (directory[filespeclen-1] != ']'
&& directory[filespeclen-1] != '>'
&& directory[filespeclen-1] != ':')
{
errno = EINVAL;
return 0;
}
filespeclen += 4; /* "*.*;" */
if (filespeclen > NAMX_MAXRSS)
{
errno = ENAMETOOLONG;
return 0;
}
*ctx = (LP_DIR_CTX *)malloc(sizeof(LP_DIR_CTX));
if (*ctx == NULL)
{
errno = ENOMEM;
return 0;
}
memset(*ctx, '\0', sizeof(LP_DIR_CTX));
strcpy((*ctx)->filespec,directory);
strcat((*ctx)->filespec,"*.*;");
/* Arrange 32-bit pointer to (copied) string storage, if needed. */
#if __INITIAL_POINTER_SIZE == 64
# define CTX_FILESPEC ctx_filespec_32p
/* Copy the file name to storage with a 32-bit pointer. */
ctx_filespec_32p = ctx_filespec_32;
strcpy( ctx_filespec_32p, (*ctx)->filespec);
#else /* __INITIAL_POINTER_SIZE == 64 */
# define CTX_FILESPEC (*ctx)->filespec
#endif /* __INITIAL_POINTER_SIZE == 64 [else] */
(*ctx)->filespec_dsc.dsc$w_length = filespeclen;
(*ctx)->filespec_dsc.dsc$b_dtype = DSC$K_DTYPE_T;
(*ctx)->filespec_dsc.dsc$b_class = DSC$K_CLASS_S;
(*ctx)->filespec_dsc.dsc$a_pointer = CTX_FILESPEC;
}
(*ctx)->result_dsc.dsc$w_length = 0;
(*ctx)->result_dsc.dsc$b_dtype = DSC$K_DTYPE_T;
(*ctx)->result_dsc.dsc$b_class = DSC$K_CLASS_D;
(*ctx)->result_dsc.dsc$a_pointer = 0;
status = lib$find_file(&(*ctx)->filespec_dsc, &(*ctx)->result_dsc,
&(*ctx)->VMS_context, 0, 0, 0, &flags);
if (status == RMS$_NMF)
{
errno = 0;
vaxc$errno = status;
return NULL;
}
if(!$VMS_STATUS_SUCCESS(status))
{
errno = EVMSERR;
vaxc$errno = status;
return NULL;
}
/* Quick, cheap and dirty way to discard any device and directory,
since we only want file names */
l = (*ctx)->result_dsc.dsc$w_length;
p = (*ctx)->result_dsc.dsc$a_pointer;
r = p;
for (; *p; p++)
{
if (*p == '^' && p[1] != '\0') /* Take care of ODS-5 escapes */
{
p++;
}
else if (*p == ':' || *p == '>' || *p == ']')
{
l -= p + 1 - r;
r = p + 1;
}
else if (*p == ';')
{
l = p - r;
break;
}
}
strncpy((*ctx)->result, r, l);
(*ctx)->result[l] = '\0';
str$free1_dx(&(*ctx)->result_dsc);
return (*ctx)->result;
}
int LP_find_file_end(LP_DIR_CTX **ctx)
{
if (ctx != NULL && *ctx != NULL)
{
int status = lib$find_file_end(&(*ctx)->VMS_context);
free(*ctx);
if(!$VMS_STATUS_SUCCESS(status))
{
errno = EVMSERR;
vaxc$errno = status;
return 0;
}
return 1;
}
errno = EINVAL;
return 0;
}
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