1 | /* |
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2 | * $Source: /afs/dev.mit.edu/source/repository/athena/bin/delete/undelete.c,v $ |
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3 | * $Author: jik $ |
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4 | * |
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5 | * This program is part of a package including delete, undelete, |
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6 | * lsdel, expunge and purge. The software suite is meant as a |
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7 | * replacement for rm which allows for file recovery. |
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8 | * |
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9 | * Copyright (c) 1989 by the Massachusetts Institute of Technology. |
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10 | * For copying and distribution information, see the file "mit-copyright.h." |
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11 | */ |
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12 | |
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13 | #if (!defined(lint) && !defined(SABER)) |
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14 | static char rcsid_undelete_c[] = "$Header: /afs/dev.mit.edu/source/repository/athena/bin/delete/undelete.c,v 1.16 1989-10-23 13:10:32 jik Exp $"; |
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15 | #endif |
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16 | |
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17 | #include <stdio.h> |
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18 | #include <sys/types.h> |
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19 | #include <sys/dir.h> |
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20 | #include <sys/param.h> |
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21 | #include <strings.h> |
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22 | #include <sys/stat.h> |
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23 | #include <com_err.h> |
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24 | #include <errno.h> |
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25 | #include "delete_errs.h" |
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26 | #include "directories.h" |
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27 | #include "pattern.h" |
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28 | #include "util.h" |
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29 | #include "undelete.h" |
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30 | #include "shell_regexp.h" |
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31 | #include "mit-copyright.h" |
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32 | #include "errors.h" |
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33 | |
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34 | extern char *malloc(), *realloc(); |
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35 | extern int errno; |
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36 | |
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37 | int interactive, recursive, verbose, directoriesonly, noop, force; |
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38 | |
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39 | |
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40 | |
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41 | main(argc, argv) |
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42 | int argc; |
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43 | char *argv[]; |
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44 | { |
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45 | extern char *optarg; |
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46 | extern int optind; |
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47 | int arg; |
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48 | int retval; |
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49 | |
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50 | initialize_del_error_table(); |
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51 | |
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52 | whoami = lastpart(argv[0]); |
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53 | interactive = recursive = verbose = directoriesonly = noop = force = 0; |
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54 | |
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55 | while ((arg = getopt(argc, argv, "firvnR")) != -1) { |
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56 | switch (arg) { |
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57 | case 'f': |
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58 | force++; |
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59 | break; |
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60 | case 'i': |
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61 | interactive++; |
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62 | break; |
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63 | case 'r': |
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64 | recursive++; |
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65 | if (directoriesonly) { |
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66 | fprintf(stderr, "%s: -r and -R and mutually exclusive.\n", |
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67 | whoami); |
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68 | usage(); |
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69 | exit(1); |
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70 | } |
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71 | break; |
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72 | case 'v': |
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73 | verbose++; |
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74 | break; |
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75 | case 'n': |
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76 | noop++; |
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77 | break; |
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78 | case 'R': |
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79 | directoriesonly++; |
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80 | if (recursive) { |
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81 | fprintf(stderr, "%s: -r and -R are mutually exclusive.\n", |
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82 | whoami); |
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83 | usage(); |
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84 | exit(1); |
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85 | } |
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86 | break; |
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87 | default: |
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88 | usage(); |
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89 | exit(1); |
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90 | } |
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91 | } |
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92 | |
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93 | report_errors = ! force; |
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94 | |
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95 | if (optind == argc) { |
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96 | if (interactive_mode()) |
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97 | error("interactive_mode"); |
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98 | } |
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99 | else while (optind < argc) { |
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100 | retval = undelete(argv[optind]); |
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101 | if (retval) |
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102 | error(argv[optind]); |
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103 | optind++; |
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104 | } |
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105 | exit(((! force) && error_occurred) ? 1 : 0); |
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106 | } |
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107 | |
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108 | |
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109 | |
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110 | interactive_mode() |
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111 | { |
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112 | char buf[MAXPATHLEN]; |
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113 | char *ptr; |
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114 | int status = 0; |
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115 | int retval; |
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116 | |
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117 | if (verbose) { |
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118 | printf("Enter the files to be undeleted, one file per line.\n"); |
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119 | printf("Hit <RETURN> on a line by itself to exit.\n\n"); |
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120 | } |
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121 | do { |
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122 | printf("%s: ", whoami); |
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123 | ptr = fgets(buf, MAXPATHLEN, stdin); |
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124 | if (! ptr) { |
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125 | printf("\n"); |
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126 | return status; |
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127 | } |
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128 | ptr = index(buf, '\n'); /* fgets breakage */ |
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129 | if (ptr) |
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130 | *ptr = '\0'; |
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131 | if (! *buf) |
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132 | return status; |
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133 | retval = undelete(buf); |
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134 | if (retval) { |
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135 | error(buf); |
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136 | status = retval; |
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137 | } |
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138 | } while (*buf); |
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139 | return status; |
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140 | } |
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141 | |
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142 | |
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143 | |
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144 | usage() |
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145 | { |
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146 | fprintf(stderr, "Usage: %s [ options ] [filename ...]\n", whoami); |
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147 | fprintf(stderr, "Options are:\n"); |
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148 | fprintf(stderr, " -r recursive\n"); |
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149 | fprintf(stderr, " -i interactive\n"); |
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150 | fprintf(stderr, " -f force\n"); |
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151 | fprintf(stderr, " -v verbose\n"); |
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152 | fprintf(stderr, " -n noop\n"); |
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153 | fprintf(stderr, " -R directories only (i.e. no recursion)\n"); |
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154 | fprintf(stderr, " -- end options and start filenames\n"); |
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155 | fprintf(stderr, "-r and -D are mutually exclusive\n"); |
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156 | } |
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157 | |
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158 | undelete(file_exp) |
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159 | char *file_exp; |
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160 | { |
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161 | char *file_re; |
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162 | char **found_files; |
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163 | int num_found; |
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164 | char *startdir; |
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165 | int status = 0; |
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166 | filerec *current; |
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167 | int retval; |
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168 | |
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169 | if (*file_exp == '/') { |
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170 | startdir = "/"; |
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171 | file_re = file_exp + 1; |
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172 | } |
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173 | else { |
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174 | startdir = ""; |
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175 | file_re = file_exp; |
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176 | } |
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177 | |
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178 | if (retval = get_the_files(startdir, file_re, &num_found, |
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179 | &found_files)) { |
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180 | error(file_exp); |
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181 | return retval; |
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182 | } |
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183 | |
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184 | if (num_found) { |
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185 | if (retval = process_files(found_files, num_found)) { |
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186 | error(file_exp); |
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187 | return retval; |
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188 | } |
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189 | if (*file_exp == '/') |
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190 | current = get_root_tree(); |
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191 | else |
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192 | current = get_cwd_tree(); |
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193 | |
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194 | status = recurs_and_undelete(current); |
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195 | if (status) { |
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196 | error(file_exp); |
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197 | return status; |
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198 | } |
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199 | } |
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200 | else { |
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201 | if (no_wildcards(file_exp)) { |
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202 | set_error(ENOENT) |
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203 | } |
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204 | else |
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205 | set_error(ENOMATCH); |
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206 | error(file_exp); |
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207 | return error_code; |
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208 | } |
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209 | |
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210 | return status; |
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211 | } |
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212 | |
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213 | |
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214 | |
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215 | |
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216 | |
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217 | int recurs_and_undelete(leaf) |
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218 | filerec *leaf; |
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219 | { |
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220 | int status = 0; |
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221 | int retval; |
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222 | |
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223 | if (leaf->specified) { |
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224 | retval = do_undelete(leaf); |
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225 | if (retval) { |
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226 | error("do_undelete"); |
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227 | return retval; |
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228 | } |
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229 | } |
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230 | |
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231 | if (leaf->dirs) { |
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232 | retval = recurs_and_undelete(leaf->dirs); |
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233 | if (retval) { |
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234 | error("recurs_and_undelete"); |
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235 | status = retval; |
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236 | } |
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237 | } |
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238 | |
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239 | if (leaf->files) { |
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240 | retval = recurs_and_undelete(leaf->files); |
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241 | if (retval) { |
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242 | error("recurs_and_undelete"); |
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243 | status = retval; |
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244 | } |
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245 | } |
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246 | |
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247 | if (leaf->next) { |
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248 | retval = recurs_and_undelete(leaf->next); |
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249 | if (retval) { |
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250 | error("recurs_and_undelete"); |
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251 | status = retval; |
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252 | } |
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253 | } |
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254 | |
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255 | if (retval = free_leaf(leaf)) { |
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256 | error("free_leaf"); |
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257 | status = retval; |
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258 | } |
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259 | |
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260 | return status; |
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261 | } |
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262 | |
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263 | |
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264 | |
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265 | |
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266 | |
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267 | |
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268 | int process_files(files, num) |
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269 | char **files; |
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270 | int num; |
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271 | { |
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272 | int i; |
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273 | listrec *filelist; |
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274 | struct filrec *not_needed; |
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275 | int retval; |
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276 | |
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277 | filelist = (listrec *) malloc((unsigned) (sizeof(listrec) * num)); |
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278 | if (! filelist) { |
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279 | set_error(errno); |
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280 | error("process_files"); |
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281 | return error_code; |
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282 | } |
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283 | |
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284 | for (i = 0; i < num; i++) { |
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285 | filelist[i].real_name = malloc((unsigned) (strlen(files[i]) + 1)); |
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286 | if (! filelist[i].real_name) { |
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287 | set_error(errno); |
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288 | error("process_files"); |
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289 | return error_code; |
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290 | } |
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291 | (void) strcpy(filelist[i].real_name, files[i]); |
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292 | filelist[i].user_name = malloc((unsigned) (strlen(files[i]) + 1)); |
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293 | if (! filelist[i].user_name) { |
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294 | set_error(errno); |
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295 | error("process_files"); |
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296 | return error_code; |
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297 | } |
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298 | convert_to_user_name(files[i], filelist[i].user_name); |
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299 | free(files[i]); |
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300 | } |
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301 | free((char *) files); |
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302 | |
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303 | if (retval = sort_files(filelist, num)) { |
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304 | error("sort_files"); |
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305 | return retval; |
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306 | } |
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307 | if (retval = unique(&filelist, &num)) { |
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308 | error("unique"); |
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309 | return retval; |
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310 | } |
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311 | if (retval = initialize_tree()) { |
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312 | error("initialize_tree"); |
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313 | return retval; |
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314 | } |
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315 | |
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316 | for (i = 0; i < num; i++) { |
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317 | if (retval = add_path_to_tree(filelist[i].real_name, ¬_needed)) { |
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318 | error("add_path_to_tree"); |
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319 | return retval; |
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320 | } |
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321 | else { |
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322 | free(filelist[i].real_name); |
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323 | free(filelist[i].user_name); |
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324 | } |
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325 | } |
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326 | free((char *) filelist); |
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327 | return 0; |
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328 | } |
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329 | |
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330 | |
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331 | |
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332 | |
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333 | |
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334 | |
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335 | |
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336 | |
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337 | do_undelete(file_ent) |
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338 | filerec *file_ent; |
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339 | { |
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340 | struct stat stat_buf; |
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341 | char user_name[MAXPATHLEN], real_name[MAXPATHLEN]; |
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342 | int retval; |
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343 | |
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344 | if (retval = get_leaf_path(file_ent, real_name)) { |
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345 | if (! force) |
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346 | fprintf(stderr, "%s: %s: %s\n", whoami, "get_leaf_path", |
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347 | error_message(retval)); |
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348 | return retval; |
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349 | } |
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350 | |
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351 | convert_to_user_name(real_name, user_name); |
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352 | |
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353 | if (interactive) { |
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354 | if ((file_ent->specs.st_mode & S_IFMT) == S_IFDIR) |
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355 | printf("%s: Undelete directory %s? ", whoami, user_name); |
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356 | else |
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357 | printf("%s: Undelete %s? ", whoami, user_name); |
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358 | if (! yes()) { |
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359 | set_status(UNDEL_NOT_UNDELETED); |
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360 | return error_code; |
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361 | } |
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362 | } |
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363 | if (! lstat(user_name, &stat_buf)) if (! force) { |
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364 | printf("%s: An undeleted %s already exists.\n", whoami, user_name); |
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365 | printf("Do you wish to continue with the undelete and overwrite that version? "); |
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366 | if (! yes()) { |
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367 | set_status(UNDEL_NOT_UNDELETED); |
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368 | return error_code; |
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369 | } |
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370 | if (! noop) if (retval = unlink_completely(user_name)) { |
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371 | error(user_name); |
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372 | return retval; |
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373 | } |
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374 | } |
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375 | if (noop) { |
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376 | printf("%s: %s would be undeleted\n", whoami, user_name); |
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377 | return 0; |
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378 | } |
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379 | |
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380 | if (retval = do_file_rename(real_name, user_name)) { |
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381 | error("do_file_rename"); |
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382 | return retval; |
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383 | } |
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384 | else { |
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385 | if (verbose) |
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386 | printf("%s: %s undeleted\n", whoami, user_name); |
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387 | return 0; |
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388 | } |
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389 | } |
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390 | |
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391 | |
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392 | |
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393 | |
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394 | do_file_rename(real_name, user_name) |
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395 | char *real_name, *user_name; |
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396 | { |
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397 | char *ptr; |
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398 | int retval; |
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399 | char error_buf[MAXPATHLEN+MAXPATHLEN+14]; |
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400 | char old_name[MAXPATHLEN], new_name[MAXPATHLEN]; |
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401 | char buf[MAXPATHLEN]; |
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402 | |
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403 | (void) strcpy(old_name, real_name); |
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404 | (void) strcpy(new_name, real_name); |
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405 | |
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406 | while (ptr = strrindex(new_name, ".#")) { |
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407 | convert_to_user_name(ptr, ptr); |
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408 | (void) strcpy(ptr, firstpart(ptr, buf)); |
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409 | (void) strcpy(&old_name[ptr - new_name], |
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410 | firstpart(&old_name[ptr - new_name], buf)); |
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411 | if (rename(old_name, new_name)) { |
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412 | set_error(errno); |
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413 | (void) sprintf(error_buf, "renaming %s to %s", |
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414 | old_name, new_name); |
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415 | error(error_buf); |
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416 | return error_code; |
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417 | } |
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418 | if (ptr > new_name) { |
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419 | *--ptr = '\0'; |
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420 | old_name[ptr - new_name] = '\0'; |
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421 | } |
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422 | } |
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423 | if (retval = change_path(real_name, user_name)) { |
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424 | error("change_path"); |
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425 | return retval; |
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426 | } |
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427 | |
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428 | return 0; |
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429 | } |
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430 | |
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431 | |
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432 | |
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433 | |
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434 | |
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435 | |
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436 | filecmp(file1, file2) |
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437 | listrec *file1, *file2; |
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438 | { |
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439 | return(strcmp(file1->user_name, file2->user_name)); |
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440 | } |
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441 | |
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442 | |
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443 | |
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444 | int sort_files(data, num_data) |
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445 | listrec *data; |
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446 | int num_data; |
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447 | { |
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448 | qsort((char *) data, num_data, sizeof(listrec), filecmp); |
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449 | |
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450 | return 0; |
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451 | } |
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452 | |
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453 | |
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454 | |
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455 | |
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456 | |
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457 | int unique(the_files, number) |
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458 | listrec **the_files; |
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459 | int *number; |
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460 | { |
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461 | int i, last; |
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462 | int offset; |
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463 | listrec *files; |
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464 | |
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465 | files = *the_files; |
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466 | for (last = 0, i = 1; i < *number; i++) { |
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467 | if (! strcmp(files[last].user_name, files[i].user_name)) { |
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468 | int better; |
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469 | |
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470 | better = choose_better(files[last].real_name, |
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471 | files[i].real_name); |
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472 | if (better == 1) { /* the first one is better */ |
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473 | free (files[i].real_name); |
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474 | free (files[i].user_name); |
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475 | files[i].real_name = (char *) NULL; |
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476 | } |
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477 | else { |
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478 | free (files[last].real_name); |
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479 | free (files[last].user_name); |
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480 | files[last].real_name = (char *) NULL; |
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481 | last = i; |
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482 | } |
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483 | } |
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484 | else |
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485 | last = i; |
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486 | } |
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487 | |
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488 | for (offset = 0, i = 0; i + offset < *number; i++) { |
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489 | if (! files[i].real_name) |
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490 | offset++; |
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491 | if (i + offset < *number) |
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492 | files[i] = files[i + offset]; |
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493 | } |
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494 | *number -= offset; |
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495 | files = (listrec *) realloc((char *) files, |
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496 | (unsigned) (sizeof(listrec) * *number)); |
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497 | if (! files) { |
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498 | set_error(errno); |
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499 | error("realloc"); |
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500 | return errno; |
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501 | } |
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502 | |
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503 | *the_files = files; |
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504 | return 0; |
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505 | } |
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506 | |
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507 | |
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508 | |
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509 | |
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510 | choose_better(str1, str2) |
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511 | char *str1, *str2; |
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512 | { |
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513 | char *pos1, *pos2; |
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514 | |
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515 | pos1 = strindex(str1, ".#"); |
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516 | pos2 = strindex(str2, ".#"); |
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517 | while (pos1 && pos2) { |
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518 | if (pos1 - str1 < pos2 - str2) |
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519 | return(2); |
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520 | else if (pos2 - str2 < pos1 - str1) |
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521 | return(1); |
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522 | pos1 = strindex(pos1 + 1, ".#"); |
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523 | pos2 = strindex(pos2 + 1, ".#"); |
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524 | } |
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525 | if (! pos1) |
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526 | return(1); |
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527 | else |
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528 | return(2); |
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529 | } |
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530 | |
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531 | |
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532 | |
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533 | |
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534 | |
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535 | unlink_completely(filename) |
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536 | char *filename; |
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537 | { |
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538 | char buf[MAXPATHLEN]; |
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539 | struct stat stat_buf; |
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540 | DIR *dirp; |
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541 | struct direct *dp; |
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542 | int retval; |
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543 | int status = 0; |
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544 | |
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545 | if (lstat(filename, &stat_buf)) { |
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546 | set_error(errno); |
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547 | error(filename); |
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548 | return error_code; |
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549 | } |
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550 | |
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551 | if ((stat_buf.st_mode & S_IFMT) == S_IFDIR) { |
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552 | dirp = opendir(filename); |
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553 | if (! dirp) { |
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554 | set_error(errno); |
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555 | error(filename); |
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556 | return error_code; |
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557 | } |
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558 | |
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559 | for (dp = readdir(dirp); dp != NULL; dp = readdir(dirp)) { |
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560 | if (is_dotfile(dp->d_name)) |
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561 | continue; |
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562 | (void) strcpy(buf, append(filename, dp->d_name)); |
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563 | if (retval = unlink_completely(buf)) { |
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564 | error(buf); |
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565 | status = retval; |
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566 | } |
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567 | } |
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568 | closedir(dirp); |
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569 | if (retval = rmdir(filename)) { |
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570 | set_error(errno); |
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571 | error(filename); |
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572 | return error_code; |
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573 | } |
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574 | } |
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575 | else if (retval = unlink(filename)) { |
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576 | set_error(errno); |
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577 | error(filename); |
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578 | return error_code; |
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579 | } |
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580 | |
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581 | return status; |
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582 | } |
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583 | |
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584 | |
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585 | |
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586 | |
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587 | int get_the_files(base, reg_exp, num_found, found) |
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588 | char *base, *reg_exp; |
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589 | int *num_found; |
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590 | char ***found; |
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591 | { |
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592 | char **matches; |
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593 | int num_matches; |
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594 | int num; |
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595 | int i; |
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596 | int retval; |
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597 | |
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598 | *found = (char **) malloc(0); |
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599 | num = 0; |
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600 | |
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601 | if (retval = find_matches(base, reg_exp, &num_matches, &matches)) { |
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602 | error("find_matches"); |
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603 | return retval; |
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604 | } |
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605 | if (recursive) { |
---|
606 | char **recurs_found; |
---|
607 | int recurs_num; |
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608 | |
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609 | for (i = 0; i < num_matches; free(matches[i]), i++) { |
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610 | if (is_deleted(lastpart(matches[i]))) { |
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611 | if (retval = add_str(found, num, matches[i])) { |
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612 | error("add_str"); |
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613 | return retval; |
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614 | } |
---|
615 | num++; |
---|
616 | } |
---|
617 | if (retval = find_deleted_recurses(matches[i], &recurs_num, |
---|
618 | &recurs_found)) { |
---|
619 | error(matches[i]); |
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620 | return retval; |
---|
621 | } |
---|
622 | if (retval = add_arrays(found, &num, &recurs_found, |
---|
623 | &recurs_num)) { |
---|
624 | error("add_arrays"); |
---|
625 | return retval; |
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626 | } |
---|
627 | } |
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628 | } |
---|
629 | else { |
---|
630 | struct stat stat_buf; |
---|
631 | char **contents_found; |
---|
632 | int num_contents; |
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633 | |
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634 | for (i = 0; i < num_matches; free(matches[i]), i++) { |
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635 | if (is_deleted(lastpart(matches[i]))) { |
---|
636 | if (retval = add_str(found, num, matches[i])) { |
---|
637 | error("add_str"); |
---|
638 | return retval; |
---|
639 | } |
---|
640 | num++; |
---|
641 | } |
---|
642 | else if (! directoriesonly) { |
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643 | if (lstat(matches[i], &stat_buf)) |
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644 | continue; |
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645 | if ((stat_buf.st_mode & S_IFMT) == S_IFDIR) { |
---|
646 | if (retval = |
---|
647 | find_deleted_contents(matches[i], &num_contents, |
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648 | &contents_found)) { |
---|
649 | error(matches[i]); |
---|
650 | return retval; |
---|
651 | } |
---|
652 | if (retval = add_arrays(found, &num, &contents_found, |
---|
653 | &num_contents)) { |
---|
654 | error("add_arrays"); |
---|
655 | return retval; |
---|
656 | } |
---|
657 | } |
---|
658 | } |
---|
659 | } |
---|
660 | |
---|
661 | } |
---|
662 | free((char *) matches); |
---|
663 | *num_found = num; |
---|
664 | return 0; |
---|
665 | } |
---|