1 /* 2 * Test file removal semantics. 3 * 4 * Copyright (C) 2019, 2021, 2022 Paul Boddie <paul@boddie.org.uk> 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License as 8 * published by the Free Software Foundation; either version 2 of 9 * the License, or (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, 19 * Boston, MA 02110-1301, USA 20 */ 21 22 #include <stdio.h> 23 #include <stdlib.h> 24 #include <string.h> 25 26 #include <sys/types.h> 27 #include <sys/stat.h> 28 29 #include <ext2fs/ext2fs.h> 30 31 #include "file.h" 32 #include "format.h" 33 #include "image.h" 34 #include "path.h" 35 #include "utils.h" 36 37 38 39 /* Buffer size for file access. */ 40 41 const int BUFSIZE = 4096; 42 43 /* Number of open files. */ 44 45 const int FILES = 20; 46 47 48 49 int main(int argc, char *argv[]) 50 { 51 int flags = EXT2_FLAG_RW; 52 char *fsname; 53 ext2_filsys fs = NULL; 54 errcode_t retval; 55 int exitcode = 0; 56 char basename[32]; 57 ext2_ino_t ino, inos[FILES]; 58 ext2_file_t file, files[FILES]; 59 char buf[BUFSIZE]; 60 unsigned int transferred; 61 int i; 62 63 if (argc < 2) 64 { 65 printf("Usage: %s <device or image file>\n", argv[0]); 66 return 1; 67 } 68 69 fsname = argv[1]; 70 71 /* Open the filesystem image using the POSIX file access mechanism. */ 72 73 retval = ext2fs_open(fsname, flags, 0, 0, unix_io_manager, &fs); 74 if (retval) 75 { 76 printf("Could not open filesystem using %s\n", fsname); 77 return 1; 78 } 79 80 retval = ext2fs_read_bitmaps(fs); 81 if (retval) 82 { 83 printf("Could not read bitmaps from %s\n", fsname); 84 return 1; 85 } 86 87 printf("Filesystem with blocksize %d\n", fs->blocksize); 88 89 /* Create some files. */ 90 91 for (i = 1; i <= FILES; i++) 92 { 93 sprintf(basename, "file%04d", i); 94 95 retval = image_create_file(fs, EXT2_ROOT_INO, basename, 0644, 96 1000, 1000, &ino); 97 98 if (retval) 99 { 100 printf("Could not create file %s\n", basename); 101 return 1; 102 } 103 104 if (ext2fs_file_open(fs, ino, EXT2_FILE_WRITE | EXT2_FILE_CREATE, &file)) 105 { 106 printf("Could not open file %s\n", basename); 107 return 1; 108 } 109 110 sprintf(buf, "writing to file%04d", i); 111 112 if (ext2fs_file_write(file, buf, strlen(buf), &transferred)) 113 { 114 printf("Could not write to file %s\n", basename); 115 return 1; 116 } 117 118 ext2fs_file_flush(file); 119 120 files[i - 1] = file; 121 inos[i - 1] = ino; 122 } 123 124 utils_list_dir(fs, ""); 125 printf("----\n"); 126 127 /* Unlink the files. */ 128 129 for (i = 1; i <= FILES; i++) 130 { 131 sprintf(basename, "file%04d", i); 132 133 if (ext2fs_unlink(fs, EXT2_ROOT_INO, basename, 0, 0)) 134 { 135 printf("Could not unlink file %s\n", basename); 136 return 1; 137 } 138 } 139 140 utils_list_dir(fs, ""); 141 printf("----\n"); 142 143 /* Access and close unlinked files. */ 144 145 for (i = 1; i <= FILES; i++) 146 { 147 sprintf(basename, "file%04d", i); 148 sprintf(buf, "; writing to file%04d", i); 149 150 file = files[i - 1]; 151 152 if (ext2fs_file_write(file, buf, strlen(buf), &transferred)) 153 { 154 printf("Could not write to file %s\n", basename); 155 return 1; 156 } 157 158 ext2fs_file_flush(file); 159 ext2fs_file_close(file); 160 } 161 162 utils_list_dir(fs, ""); 163 printf("----\n"); 164 165 /* Create some more files. */ 166 167 for (i = 1; i <= FILES; i++) 168 { 169 sprintf(basename, "file%04d", i + FILES); 170 171 retval = image_create_file(fs, EXT2_ROOT_INO, basename, 0644, 172 1000, 1000, &ino); 173 174 if (retval) 175 { 176 printf("Could not create file %s\n", basename); 177 return 1; 178 } 179 180 if (ext2fs_file_open(fs, ino, EXT2_FILE_WRITE | EXT2_FILE_CREATE, &file)) 181 { 182 printf("Could not write file %s\n", basename); 183 return 1; 184 } 185 186 ext2fs_file_flush(file); 187 ext2fs_file_close(file); 188 } 189 190 utils_list_dir(fs, ""); 191 printf("----\n"); 192 193 /* Re-open the original files and read from them. */ 194 195 for (i = 1; i <= FILES; i++) 196 { 197 sprintf(basename, "file%04d", i); 198 199 ino = inos[i - 1]; 200 201 if (ext2fs_file_open(fs, ino, 0, &file)) 202 { 203 printf("Could not open file %s\n", basename); 204 return 1; 205 } 206 207 if (ext2fs_file_read(file, buf, BUFSIZE, &transferred)) 208 { 209 printf("Could not read from file %s\n", basename); 210 return 1; 211 } 212 213 buf[transferred] = '\0'; 214 printf("Read from %s: %s\n", basename, buf); 215 216 ext2fs_file_close(file); 217 } 218 219 /* Create some more files with the same names as the original ones. */ 220 221 for (i = 1; i <= FILES; i++) 222 { 223 sprintf(basename, "file%04d", i); 224 225 retval = image_create_file(fs, EXT2_ROOT_INO, basename, 0644, 226 1000, 1000, &ino); 227 228 if (retval) 229 { 230 printf("Could not create file %s\n", basename); 231 return 1; 232 } 233 234 if (ext2fs_file_open(fs, ino, EXT2_FILE_WRITE | EXT2_FILE_CREATE, &file)) 235 { 236 printf("Could not write file %s\n", basename); 237 return 1; 238 } 239 240 ext2fs_file_flush(file); 241 ext2fs_file_close(file); 242 } 243 244 utils_list_dir(fs, ""); 245 printf("----\n"); 246 247 /* Re-open the original files and read from them again. */ 248 249 for (i = 1; i <= FILES; i++) 250 { 251 sprintf(basename, "file%04d", i); 252 253 ino = inos[i - 1]; 254 255 if (ext2fs_file_open(fs, ino, 0, &file)) 256 { 257 printf("Could not open file %s\n", basename); 258 return 1; 259 } 260 261 if (ext2fs_file_read(file, buf, BUFSIZE, &transferred)) 262 { 263 printf("Could not read from file %s\n", basename); 264 return 1; 265 } 266 267 buf[transferred] = '\0'; 268 printf("Read from %s: %s\n", basename, buf); 269 270 ext2fs_file_close(file); 271 } 272 273 /* Close the filesystem image. */ 274 275 retval = ext2fs_flush(fs); 276 if (retval) 277 { 278 printf("Error flushing filesystem in %s\n", fsname); 279 exitcode = 1; 280 } 281 282 retval = ext2fs_close(fs); 283 if (retval) 284 { 285 printf("Error closing filesystem in %s\n", fsname); 286 exitcode = 1; 287 } 288 289 ext2fs_free(fs); 290 return exitcode; 291 }