| 1 | // |
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| 2 | // TxWin, Textmode Windowing Library |
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| 3 | // |
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| 4 | // Original code Copyright (c) 1995-2005 Fsys Software and Jan van Wijk |
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| 5 | // |
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| 6 | // ========================================================================== |
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| 7 | // |
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| 8 | // This file contains Original Code and/or Modifications of Original Code as |
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| 9 | // defined in and that are subject to the GNU Lesser General Public License. |
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| 10 | // You may not use this file except in compliance with the License. |
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| 11 | // BY USING THIS FILE YOU AGREE TO ALL TERMS AND CONDITIONS OF THE LICENSE. |
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| 12 | // A copy of the License is provided with the Original Code and Modifications, |
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| 13 | // and is also available at http://www.dfsee.com/txwin/lgpl.htm |
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| 14 | // |
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| 15 | // This library is free software; you can redistribute it and/or modify |
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| 16 | // it under the terms of the GNU Lesser General Public License as published |
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| 17 | // by the Free Software Foundation; either version 2.1 of the License, |
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| 18 | // or (at your option) any later version. |
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| 19 | // |
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| 20 | // This library is distributed in the hope that it will be useful, |
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| 21 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 22 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
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| 23 | // See the GNU Lesser General Public License for more details. |
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| 24 | // |
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| 25 | // You should have received a copy of the GNU Lesser General Public License |
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| 26 | // along with this library; (lgpl.htm) if not, write to the Free Software |
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| 27 | // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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| 28 | // |
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| 29 | // Questions on TxWin licensing can be directed to: txwin@fsys.nl |
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| 30 | // |
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| 31 | // ========================================================================== |
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| 32 | // |
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| 33 | // TxLib filesystem functions, file-exist section |
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| 34 | // |
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| 35 | |
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| 36 | #include <txlib.h> // TxLib interface |
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| 37 | |
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| 38 | #include <sys/stat.h> // for low level stuff |
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| 39 | |
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| 40 | |
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| 41 | /*****************************************************************************/ |
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| 42 | // Create empty file with specified path/name, prompt to replace existing |
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| 43 | /*****************************************************************************/ |
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| 44 | ULONG TxCreateEmptyFile |
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| 45 | ( |
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| 46 | char *fname, // IN path and filename |
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| 47 | BOOL prompt // IN prompt on replace |
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| 48 | ) |
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| 49 | { |
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| 50 | ULONG rc = NO_ERROR; // function return |
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| 51 | FILE *fp; |
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| 52 | |
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| 53 | ENTER(); |
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| 54 | TRACES(( "Fname:'%s' prompt:%s\n", fname, (prompt) ? "YES" : "NO")); |
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| 55 | |
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| 56 | if (prompt && (TxFileExists( fname))) |
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| 57 | { |
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| 58 | if (!TxConfirm( 0, "File '%s' exists, replace ? [Y/N] : ", fname)) |
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| 59 | { |
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| 60 | rc = TX_ABORTED; |
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| 61 | } |
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| 62 | } |
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| 63 | if (rc == NO_ERROR) |
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| 64 | { |
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| 65 | if ((fp = fopen( fname, "w")) != NULL) |
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| 66 | { |
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| 67 | fclose( fp); |
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| 68 | } |
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| 69 | else |
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| 70 | { |
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| 71 | rc = TX_ACCESS_DENIED; |
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| 72 | } |
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| 73 | } |
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| 74 | RETURN (rc); |
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| 75 | } // end 'TxCreateEmptyFile' |
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| 76 | /*---------------------------------------------------------------------------*/ |
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| 77 | |
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| 78 | |
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| 79 | /*****************************************************************************/ |
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| 80 | // Test if exact (path+) filename is accessible; supports > 2GiB files |
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| 81 | /*****************************************************************************/ |
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| 82 | BOOL TxFileExists // RET file is accessible |
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| 83 | ( |
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| 84 | char *fname // IN filename string |
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| 85 | ) |
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| 86 | { |
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| 87 | BOOL rc = FALSE; // function return |
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| 88 | TXHFILE fh = 0; |
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| 89 | |
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| 90 | #if defined (DEV32) // test large file support APIs |
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| 91 | ULONG action; // action taken on open |
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| 92 | TXF_OS2LFAPI api; // large file API |
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| 93 | |
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| 94 | if (TxLargeFileApiOS2( &api)) |
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| 95 | { |
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| 96 | (api.DosOpenLarge)( fname, &fh, &action, 0, FILE_NORMAL, FILE_OPEN, |
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| 97 | OPEN_ACCESS_READONLY | OPEN_SHARE_DENYNONE, NULL); |
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| 98 | } |
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| 99 | else |
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| 100 | { |
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| 101 | DosOpen( fname, &fh, &action, 0, FILE_NORMAL, FILE_OPEN, |
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| 102 | OPEN_ACCESS_READONLY | OPEN_SHARE_DENYNONE, NULL); |
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| 103 | } |
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| 104 | #elif defined (WIN32) |
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| 105 | fh = CreateFile( fname, GENERIC_READ, FILE_SHARE_READ, NULL, |
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| 106 | OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL); |
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| 107 | #elif defined (LINUX) |
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| 108 | fh = open( fname, O_RDONLY); |
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| 109 | #else |
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| 110 | fh = fopen( fname, "r"); |
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| 111 | #endif |
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| 112 | |
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| 113 | if ((fh != 0) && (fh != ((TXHFILE) -1))) |
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| 114 | { |
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| 115 | (void) TxClose( fh); |
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| 116 | rc = TRUE; |
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| 117 | } |
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| 118 | return( rc); |
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| 119 | } // end 'TxFileExists' |
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| 120 | /*---------------------------------------------------------------------------*/ |
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