1 | /* |
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2 | * delete_file.java |
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3 | * |
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4 | * Copyright (C) 2003-2005 Peter Graves |
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5 | * $Id: delete_file.java 15569 2022-03-19 12:50:18Z mevenson $ |
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6 | * |
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7 | * This program is free software; you can redistribute it and/or |
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8 | * modify it under the terms of the GNU General Public License |
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9 | * as published by the Free Software Foundation; either version 2 |
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10 | * of the License, or (at your option) any later version. |
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11 | * |
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12 | * This program is distributed in the hope that it will be useful, |
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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15 | * GNU General Public License for more details. |
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16 | * |
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17 | * You should have received a copy of the GNU General Public License |
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18 | * along with this program; if not, write to the Free Software |
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19 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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20 | * |
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21 | * As a special exception, the copyright holders of this library give you |
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22 | * permission to link this library with independent modules to produce an |
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23 | * executable, regardless of the license terms of these independent |
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24 | * modules, and to copy and distribute the resulting executable under |
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25 | * terms of your choice, provided that you also meet, for each linked |
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26 | * independent module, the terms and conditions of the license of that |
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27 | * module. An independent module is a module which is not derived from |
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28 | * or based on this library. If you modify this library, you may extend |
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29 | * this exception to your version of the library, but you are not |
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30 | * obligated to do so. If you do not wish to do so, delete this |
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31 | * exception statement from your version. |
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32 | */ |
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33 | |
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34 | package org.armedbear.lisp; |
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35 | |
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36 | import static org.armedbear.lisp.Lisp.*; |
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37 | |
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38 | import java.io.File; |
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39 | import java.io.IOException; |
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40 | |
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41 | public final class delete_file extends Primitive |
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42 | { |
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43 | private delete_file() |
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44 | { |
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45 | super("delete-file", "filespec"); |
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46 | } |
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47 | |
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48 | // ### delete-file filespec => t |
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49 | @Override |
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50 | public LispObject execute(LispObject arg) |
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51 | { |
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52 | // Don't follow symlinks! We want to delete the symlink itself, not |
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53 | // the linked-to file. |
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54 | Pathname pathname = coerceToPathname(arg); |
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55 | if (arg instanceof Stream) |
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56 | ((Stream)arg)._close(); |
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57 | if (pathname instanceof LogicalPathname) |
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58 | pathname = LogicalPathname.translateLogicalPathname((LogicalPathname)pathname); |
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59 | if (pathname.isWild()) |
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60 | return error(new FileError("Bad place for a wild pathname.", |
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61 | pathname)); |
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62 | final Pathname defaultedPathname |
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63 | = Pathname.mergePathnames(pathname, |
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64 | coerceToPathname(Symbol.DEFAULT_PATHNAME_DEFAULTS.symbolValue()), |
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65 | NIL); |
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66 | |
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67 | File file; |
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68 | if (defaultedPathname.isRemote()) { |
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69 | return error(new FileError("Unable to delete remote pathnames", defaultedPathname)); |
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70 | } else if (defaultedPathname instanceof JarPathname) { |
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71 | JarPathname jar = (JarPathname)defaultedPathname; |
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72 | Pathname root = (Pathname)jar.getRootJar(); |
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73 | Cons jars = (Cons)jar.getJars(); |
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74 | |
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75 | if (jar.isArchiveEntry() |
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76 | || jars.length() > 1) { |
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77 | return error(new FileError("Unable to delete entries within JAR-PATHNAME", jar)); |
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78 | } |
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79 | ZipCache.remove(jar); |
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80 | file = root.getFile(); |
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81 | } else { |
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82 | file = defaultedPathname.getFile(); |
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83 | } |
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84 | |
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85 | if (file.exists()) { |
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86 | // File exists. |
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87 | for (int i = 0; i < 2; i++) { |
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88 | if (file.delete()) { |
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89 | return T; |
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90 | } |
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91 | // Under Windows our fasls get placed in the ZipCache when compiled |
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92 | ZipCache.remove(defaultedPathname); |
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93 | System.gc(); |
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94 | Thread.yield(); |
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95 | } |
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96 | Pathname truename = (Pathname)Pathname.create(file.getAbsolutePath()); |
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97 | StringBuilder sb = new StringBuilder("Unable to delete "); |
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98 | sb.append(file.isDirectory() ? "directory " : "file "); |
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99 | sb.append(truename.princToString()); |
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100 | sb.append('.'); |
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101 | return error(new FileError(sb.toString(), truename)); |
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102 | } else { |
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103 | // File does not exist. |
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104 | return T; |
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105 | } |
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106 | } |
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107 | |
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108 | private static final Primitive DELETE_FILE = new delete_file(); |
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109 | } |
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