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 } 206 207