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