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annotate app/src/main/java/ch/ethz/ssh2/SFTPClient.java @ 518:9acc51a5a98f

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Added tag stable-1.9.4-6 for changeset 947ea334735d
author Carl Byington <carl@five-ten-sg.com>
date Fri, 31 May 2024 13:35:44 -0600
parents d29cce60f393
children
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1 package ch.ethz.ssh2;
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2
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3 import java.io.IOException;
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4 import java.util.List;
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5
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6 /**
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7 * @version $Id: SFTPClient.java 151 2014-04-28 10:03:39Z dkocher@sudo.ch $
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8 */
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9 public interface SFTPClient {
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10
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11 /**
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12 * Retrieve the file attributes of an open file.
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13 *
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14 * @param handle a SFTPv3FileHandle handle.
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15 * @return a SFTPv3FileAttributes object.
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16 * @throws IOException
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17 */
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18 SFTPFileAttributes fstat(SFTPFileHandle handle) throws IOException;
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19
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20 /**
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21 * Retrieve the file attributes of a file. This method
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22 * follows symbolic links on the server.
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23 *
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24 * @param path See the {@link SFTPClient comment} for the class for more details.
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25 * @return a SFTPv3FileAttributes object.
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26 * @throws IOException
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27 * @see #lstat(String)
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28 */
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29 SFTPFileAttributes stat(String path) throws IOException;
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30
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31 /**
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32 * Retrieve the file attributes of a file. This method
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33 * does NOT follow symbolic links on the server.
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34 *
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35 * @param path See the {@link SFTPClient comment} for the class for more details.
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36 * @return a SFTPv3FileAttributes object.
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37 * @throws IOException
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38 * @see #stat(String)
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39 */
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40 SFTPFileAttributes lstat(String path) throws IOException;
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41
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42 /**
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43 * Read the target of a symbolic link. Note: OpenSSH (as of version 4.4) gets very upset
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44 * (SSH_FX_BAD_MESSAGE error) if you want to read the target of a file that is not a
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45 * symbolic link. Better check first with {@link #lstat(String)}.
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46 *
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47 * @param path See the {@link SFTPClient comment} for the class for more details.
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48 * @return The target of the link.
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49 * @throws IOException
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50 */
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51 String readLink(String path) throws IOException;
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52
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53 /**
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54 * Modify the attributes of a file. Used for operations such as changing
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55 * the ownership, permissions or access times, as well as for truncating a file.
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56 *
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57 * @param path See the {@link SFTPClient comment} for the class for more details.
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58 * @param attr A SFTPv3FileAttributes object. Specifies the modifications to be
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59 * made to the attributes of the file. Empty fields will be ignored.
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60 * @throws IOException
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61 */
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62 void setstat(String path, SFTPFileAttributes attr) throws IOException;
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63
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64 /**
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65 * Modify the attributes of a file. Used for operations such as changing
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66 * the ownership, permissions or access times, as well as for truncating a file.
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67 *
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68 * @param handle a SFTPv3FileHandle handle
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69 * @param attr A SFTPv3FileAttributes object. Specifies the modifications to be
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70 * made to the attributes of the file. Empty fields will be ignored.
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71 * @throws IOException
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72 */
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73 void fsetstat(SFTPFileHandle handle, SFTPFileAttributes attr) throws IOException;
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74
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75 /**
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76 * Create a symbolic link on the server. Creates a link "src" that points
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77 * to "target".
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78 *
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79 * @param src See the {@link SFTPClient comment} for the class for more details.
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80 * @param target See the {@link SFTPClient comment} for the class for more details.
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81 * @throws IOException
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82 */
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83 void createSymlink(String src, String target) throws IOException;
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84
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85 /**
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86 * Create a symbolic link on the server. Creates a link "src" that points
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87 * to "target".
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88 *
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89 * @param src See the {@link SFTPClient comment} for the class for more details.
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90 * @param target See the {@link SFTPClient comment} for the class for more details.
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91 * @throws IOException
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92 */
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93 void createHardlink(String src, String target) throws IOException;
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94
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95 /**
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96 * Have the server canonicalize any given path name to an absolute path.
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97 * This is useful for converting path names containing ".." components or
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98 * relative pathnames without a leading slash into absolute paths.
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99 *
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100 * @param path See the {@link SFTPClient comment} for the class for more details.
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101 * @return An absolute path.
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102 * @throws IOException
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103 */
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104 String canonicalPath(String path) throws IOException;
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105
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106 void setCharset(String charset) throws IOException;
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107
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108 String getCharset();
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109
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110 SFTPFileHandle openDirectory(String path) throws IOException;
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111
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112 boolean isConnected();
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113
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114 void close();
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115
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116 List<? extends SFTPDirectoryEntry> ls(String dirName) throws IOException;
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117
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118 /**
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119 * Create a new directory.
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120 *
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121 * @param name See the {@link SFTPClient comment} for the class for more details.
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122 * @param posixPermissions the permissions for this directory, e.g., "0700" (remember that
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123 * this is octal noation). The server will likely apply a umask.
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124 * @throws IOException
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125 */
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126 void mkdir(String name, int posixPermissions) throws IOException;
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127
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128 /**
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129 * Remove a file.
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130 *
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131 * @param filename See the {@link SFTPClient comment} for the class for more details.
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132 * @throws IOException
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133 */
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134 void rm(String filename) throws IOException;
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135
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136 /**
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137 * Remove an empty directory.
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138 *
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139 * @param dirName See the {@link SFTPClient comment} for the class for more details.
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140 * @throws IOException
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141 */
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142 void rmdir(String dirName) throws IOException;
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143
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144 /**
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145 * Move a file or directory.
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146 *
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147 * @param oldPath See the {@link SFTPClient comment} for the class for more details.
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148 * @param newPath See the {@link SFTPClient comment} for the class for more details.
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149 * @throws IOException
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150 */
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151 void mv(String oldPath, String newPath) throws IOException;
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152
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153 /**
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154 * Create a file and open it for reading and writing.
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155 * Same as {@link #createFile(String, SFTPFileAttributes) createFile(filename, null)}.
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156 *
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157 * @param filename See the {@link SFTPClient comment} for the class for more details.
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158 * @return a SFTPv3FileHandle handle
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159 * @throws IOException
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160 */
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161 SFTPFileHandle createFile(String filename) throws IOException;
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162
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163 /**
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164 * Create a file and open it for reading and writing.
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165 * You can specify the default attributes of the file (the server may or may
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166 * not respect your wishes).
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167 *
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168 * @param filename See the {@link SFTPv3Client comment} for the class for more details.
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169 * @param attr may be <code>null</code> to use server defaults. Probably only
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170 * the <code>uid</code>, <code>gid</code> and <code>permissions</code>
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171 * (remember the server may apply a umask) entries of the {@link SFTPv3FileHandle}
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172 * structure make sense. You need only to set those fields where you want
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173 * to override the server's defaults.
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174 * @return a SFTPv3FileHandle handle
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175 * @throws IOException
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176 */
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177 SFTPFileHandle createFile(String filename, SFTPFileAttributes attr) throws IOException;
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178
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179 SFTPFileHandle openFile(String filename, int flags) throws IOException;
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180
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181 /**
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182 * Read bytes from a file in a parallel fashion. As many bytes as you want will be read.
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183 * <p/>
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184 * <ul>
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185 * <li>The server will read as many bytes as it can from the file (up to <code>len</code>),
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186 * and return them.</li>
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187 * <li>If EOF is encountered before reading any data, <code>-1</code> is returned.
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188 * <li>If an error occurs, an exception is thrown</li>.
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189 * <li>For normal disk files, it is guaranteed that the server will return the specified
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190 * number of bytes, or up to end of file. For, e.g., device files this may return
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191 * fewer bytes than requested.</li>
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192 * </ul>
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193 *
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194 * @param handle a SFTPv3FileHandle handle
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195 * @param fileOffset offset (in bytes) in the file
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196 * @param dst the destination byte array
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197 * @param dstoff offset in the destination byte array
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198 * @param len how many bytes to read, 0 &lt; len
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199 * @return the number of bytes that could be read, may be less than requested if
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200 * the end of the file is reached, -1 is returned in case of <code>EOF</code>
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201 * @throws IOException
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202 */
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203 int read(SFTPFileHandle handle, long fileOffset, byte[] dst, int dstoff, int len) throws IOException;
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204
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205 /**
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206 * Write bytes to a file. If <code>len</code> &gt; 32768, then the write operation will
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207 * be split into multiple writes.
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208 *
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209 * @param handle a SFTPv3FileHandle handle.
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210 * @param fileOffset offset (in bytes) in the file.
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211 * @param src the source byte array.
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212 * @param srcoff offset in the source byte array.
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213 * @param len how many bytes to write.
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214 * @throws IOException
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215 */
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216 void write(SFTPFileHandle handle, long fileOffset, byte[] src, int srcoff, int len) throws IOException;
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217
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218 /**
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219 * Close a file.
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220 *
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221 * @param handle a file handle
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222 * @throws IOException
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223 */
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224 void closeFile(SFTPFileHandle handle) throws IOException;
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225 }