1 | /* |
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2 | * $Source: /afs/dev.mit.edu/source/repository/athena/bin/delete/delete.c,v $ |
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3 | * $Author: danw $ |
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4 | * |
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5 | * This program is a replacement for rm. Instead of actually deleting |
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6 | * files, it marks them for deletion by prefixing them with a ".#" |
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7 | * prefix. |
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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-copying.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_delete_c[] = "$Header: /afs/dev.mit.edu/source/repository/athena/bin/delete/delete.c,v 1.31 1997-12-31 22:35:58 danw Exp $"; |
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15 | #endif |
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16 | |
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17 | #include <sys/types.h> |
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18 | #ifdef AFS_MOUNTPOINTS |
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19 | #include <sys/time.h> |
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20 | #endif |
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21 | #include <stdio.h> |
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22 | #include <dirent.h> |
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23 | #include <string.h> |
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24 | #include <unistd.h> |
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25 | |
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26 | #include <sys/param.h> |
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27 | #include <errno.h> |
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28 | #include "errors.h" |
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29 | #include "delete_errs.h" |
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30 | #include "util.h" |
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31 | #include "delete.h" |
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32 | #include "mit-copying.h" |
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33 | |
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34 | |
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35 | |
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36 | /* |
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37 | * ALGORITHM: |
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38 | * |
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39 | * 1. Parse command-line arguments and set flags. |
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40 | * 2. Call the function delete() for each filename command-line argument. |
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41 | * |
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42 | * delete(): |
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43 | * |
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44 | * 1. Can the file be lstat'd? |
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45 | * no -- abort |
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46 | * yes -- continue |
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47 | * 2. Is the file a directory? |
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48 | * yes -- is it a dotfile? |
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49 | * yes -- abort |
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50 | * no -- continue |
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51 | * -- is the filesonly option set? |
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52 | * yes -- is the recursive option specified? |
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53 | * yes -- continue |
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54 | * no -- abort |
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55 | * no -- is the directory empty? |
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56 | * yes -- remove it |
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57 | * no -- is the directoriesonly option set? |
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58 | * yes -- abort |
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59 | * no -- continue |
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60 | * -- is the recursive option specified? |
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61 | * yes -- continue |
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62 | * no -- abort |
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63 | * no -- is the directoriesonly option set? |
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64 | * yes -- abort |
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65 | * no -- continue |
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66 | * 3. If the file is a file, remove it. |
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67 | * 4. If the file is a directory, open it and pass each of its members |
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68 | * (excluding . files) to delete(). |
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69 | */ |
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70 | |
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71 | |
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72 | int force, interactive, recursive, noop, verbose, filesonly, directoriesonly; |
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73 | int emulate_rm, linked_to_rm, linked_to_rmdir; |
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74 | #ifdef AFS_MOUNTPOINTS |
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75 | struct timeval tvp[2]; |
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76 | #endif |
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77 | |
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78 | main(argc, argv) |
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79 | int argc; |
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80 | char *argv[]; |
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81 | { |
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82 | extern char *optarg; |
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83 | extern int optind; |
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84 | int arg; |
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85 | |
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86 | whoami = lastpart(argv[0]); |
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87 | |
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88 | initialize_del_error_table(); |
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89 | |
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90 | #ifdef AFS_MOUNTPOINTS |
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91 | gettimeofday(&tvp[0], (struct timezone *)0); |
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92 | tvp[1] = tvp[0]; |
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93 | #endif |
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94 | |
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95 | force = interactive = recursive = noop = verbose = filesonly = |
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96 | directoriesonly = emulate_rm = linked_to_rm = linked_to_rmdir = 0; |
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97 | |
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98 | if (!strcmp(whoami, "rm")) |
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99 | emulate_rm++, filesonly++, linked_to_rm++; |
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100 | if (!strcmp(whoami, "rmdir") || !strcmp(whoami, "rd")) |
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101 | emulate_rm++, directoriesonly++, linked_to_rmdir++; |
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102 | |
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103 | while ((arg = getopt(argc, argv, "efirnvFD")) != -1) { |
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104 | switch (arg) { |
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105 | case 'r': |
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106 | recursive++; |
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107 | if (directoriesonly) { |
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108 | fprintf(stderr, "%s: -r and -D are mutually exclusive.\n", |
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109 | whoami); |
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110 | usage(); |
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111 | exit(1); |
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112 | } |
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113 | break; |
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114 | case 'f': |
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115 | force++; |
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116 | break; |
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117 | case 'i': |
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118 | interactive++; |
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119 | break; |
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120 | case 'n': |
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121 | noop++; |
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122 | break; |
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123 | case 'v': |
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124 | verbose++; |
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125 | break; |
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126 | case 'e': |
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127 | emulate_rm++; |
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128 | break; |
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129 | case 'F': |
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130 | filesonly++; |
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131 | if (directoriesonly) { |
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132 | fprintf(stderr, "%s: -F and -D are mutually exclusive.\n", |
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133 | whoami); |
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134 | usage(); |
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135 | exit(1); |
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136 | } |
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137 | break; |
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138 | case 'D': |
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139 | directoriesonly++; |
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140 | if (recursive) { |
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141 | fprintf(stderr, "%s: -r and -D are mutually exclusive.\n", |
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142 | whoami); |
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143 | usage(); |
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144 | exit(1); |
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145 | } |
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146 | if (filesonly) { |
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147 | fprintf(stderr, "%s: -F and -D are mutually exclusive.\n", |
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148 | whoami); |
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149 | usage(); |
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150 | exit(1); |
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151 | } |
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152 | break; |
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153 | default: |
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154 | usage(); |
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155 | exit(1); |
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156 | } |
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157 | } |
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158 | report_errors = ! (force || emulate_rm); |
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159 | |
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160 | if (optind == argc) { |
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161 | if (! force) { |
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162 | fprintf(stderr, "%s: no files specified.\n", whoami); |
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163 | usage(); |
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164 | } |
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165 | exit(force ? 0 : 1); |
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166 | } |
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167 | while (optind < argc) { |
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168 | if (delete(argv[optind], 0)) |
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169 | error(argv[optind]); |
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170 | optind++; |
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171 | } |
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172 | exit(((! force) && error_occurred) ? 1 : 0); |
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173 | } |
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174 | |
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175 | |
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176 | |
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177 | usage() |
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178 | { |
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179 | printf("Usage: %s [ options ] filename ...\n", whoami); |
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180 | printf("Options are:\n"); |
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181 | if (! linked_to_rmdir) |
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182 | printf(" -r recursive\n"); |
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183 | printf(" -i interactive\n"); |
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184 | printf(" -f force\n"); |
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185 | printf(" -n noop\n"); |
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186 | printf(" -v verbose\n"); |
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187 | if (! (linked_to_rmdir || linked_to_rm)) { |
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188 | printf(" -e emulate rm/rmdir\n"); |
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189 | printf(" -F files only\n"); |
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190 | printf(" -D directories only\n"); |
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191 | } |
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192 | printf(" -- end options and start filenames\n"); |
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193 | if (! (linked_to_rmdir || linked_to_rm)) { |
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194 | printf("-r and -D are mutually exclusive\n"); |
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195 | printf("-F and -D are mutually exclusive\n"); |
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196 | } |
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197 | } |
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198 | |
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199 | |
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200 | |
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201 | |
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202 | delete(filename, recursed) |
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203 | char *filename; |
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204 | int recursed; |
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205 | { |
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206 | struct stat stat_buf; |
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207 | int retval; |
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208 | |
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209 | /* can the file be lstat'd? */ |
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210 | if (lstat(filename, &stat_buf) == -1) { |
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211 | set_error(errno); |
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212 | if (emulate_rm && (! force)) |
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213 | fprintf(stderr, "%s: %s nonexistent\n", whoami, filename); |
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214 | error(filename); |
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215 | return error_code; |
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216 | } |
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217 | |
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218 | /* is the file a directory? */ |
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219 | if ((stat_buf.st_mode & S_IFMT) == S_IFDIR) { |
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220 | /* is the file a dot file? */ |
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221 | if (is_dotfile(lastpart(filename))) { |
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222 | set_error(DELETE_IS_DOTFILE); |
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223 | if (emulate_rm && (! force)) |
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224 | fprintf(stderr, "%s: cannot remove `.' or `..'\n", whoami); |
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225 | error(filename); |
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226 | return error_code; |
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227 | } |
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228 | |
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229 | /* is the filesonly option set? */ |
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230 | if (filesonly) { |
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231 | /* is the recursive option specified? */ |
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232 | if (recursive) { |
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233 | if (retval = recursive_delete(filename, stat_buf, |
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234 | recursed)) { |
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235 | error(filename); |
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236 | return retval; |
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237 | } |
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238 | } |
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239 | else { |
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240 | if (emulate_rm && (! force)) |
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241 | fprintf(stderr, "%s: %s directory\n", whoami, |
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242 | filename); |
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243 | set_error(DELETE_CANT_DEL_DIR); |
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244 | error(filename); |
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245 | return error_code; |
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246 | } |
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247 | } |
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248 | else { |
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249 | /* is the directory empty? */ |
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250 | if ((retval = empty_directory(filename)) < 0) { |
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251 | error(filename); |
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252 | if (! emulate_rm) |
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253 | return error_code; |
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254 | } |
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255 | |
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256 | if (retval > 0) { |
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257 | /* remove it */ |
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258 | if (retval = do_move(filename, stat_buf, 0)) { |
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259 | error(filename); |
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260 | return error_code; |
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261 | } |
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262 | } |
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263 | else { |
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264 | /* is the directoriesonly option set? */ |
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265 | if (directoriesonly) { |
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266 | if (emulate_rm && (! force)) |
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267 | fprintf(stderr, "%s: %s: Directory not empty\n", |
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268 | whoami, filename); |
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269 | set_error(DELETE_DIR_NOT_EMPTY); |
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270 | error(filename); |
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271 | return error_code; |
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272 | } |
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273 | else { |
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274 | /* is the recursive option specified? */ |
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275 | if (recursive) { |
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276 | if (retval = recursive_delete(filename, stat_buf, |
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277 | recursed)) { |
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278 | error(filename); |
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279 | return error_code; |
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280 | } |
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281 | } |
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282 | else { |
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283 | if (emulate_rm && (! force)) |
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284 | fprintf(stderr, "%s: %s not empty\n", |
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285 | whoami, filename); |
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286 | set_error(DELETE_DIR_NOT_EMPTY); |
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287 | error(filename); |
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288 | return error_code; |
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289 | } |
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290 | } |
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291 | } |
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292 | } |
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293 | } |
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294 | else { |
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295 | /* is the directoriesonly option set? */ |
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296 | if (directoriesonly) { |
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297 | if (emulate_rm && (! force)) |
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298 | fprintf(stderr, "%s: %s: Not a directory\n", whoami, |
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299 | filename); |
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300 | set_error(DELETE_CANT_DEL_FILE); |
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301 | error(filename); |
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302 | return error_code; |
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303 | } |
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304 | else { |
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305 | if (retval = do_move(filename, stat_buf, 0)) { |
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306 | error(filename); |
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307 | return error_code; |
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308 | } |
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309 | } |
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310 | } |
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311 | return 0; |
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312 | } |
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313 | |
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314 | |
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315 | |
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316 | |
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317 | |
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318 | empty_directory(filename) |
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319 | char *filename; |
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320 | { |
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321 | DIR *dirp; |
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322 | struct dirent *dp; |
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323 | |
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324 | dirp = Opendir(filename); |
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325 | if (! dirp) { |
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326 | set_error(errno); |
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327 | error(filename); |
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328 | return -1; |
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329 | } |
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330 | for (dp = readdir(dirp); dp != NULL; dp = readdir(dirp)) { |
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331 | if (is_dotfile(dp->d_name)) |
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332 | continue; |
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333 | if (is_deleted(dp->d_name)) |
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334 | continue; |
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335 | else { |
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336 | closedir(dirp); |
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337 | return 0; |
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338 | } |
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339 | } |
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340 | closedir(dirp); |
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341 | return 1; |
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342 | } |
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343 | |
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344 | |
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345 | |
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346 | |
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347 | recursive_delete(filename, stat_buf, recursed) |
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348 | char *filename; |
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349 | struct stat stat_buf; |
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350 | int recursed; |
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351 | { |
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352 | DIR *dirp; |
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353 | struct dirent *dp; |
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354 | int status = 0; |
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355 | char newfile[MAXPATHLEN]; |
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356 | int retval = 0; |
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357 | |
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358 | if (interactive && recursed) { |
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359 | printf("%s: remove directory %s? ", whoami, filename); |
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360 | if (! yes()) { |
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361 | set_status(DELETE_NOT_DELETED); |
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362 | return error_code; |
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363 | } |
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364 | } |
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365 | dirp = Opendir(filename); |
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366 | if (! dirp) { |
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367 | if (emulate_rm && (! force)) |
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368 | fprintf(stderr, "%s: %s not changed\n", whoami, filename); |
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369 | set_error(errno); |
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370 | error(filename); |
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371 | return error_code; |
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372 | } |
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373 | for (dp = readdir(dirp); dp != NULL; dp = readdir(dirp)) { |
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374 | if (is_dotfile(dp->d_name)) |
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375 | continue; |
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376 | if (is_deleted(dp->d_name)) |
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377 | continue; |
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378 | else { |
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379 | (void) strcpy(newfile, append(filename, dp->d_name)); |
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380 | if (! *newfile) { |
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381 | error(filename); |
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382 | status = error_code; |
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383 | } |
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384 | |
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385 | retval = delete(newfile, 1); |
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386 | if (retval) { |
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387 | error(newfile); |
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388 | status = retval; |
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389 | } |
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390 | } |
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391 | } |
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392 | closedir(dirp); |
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393 | |
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394 | if (status && (! emulate_rm)) { |
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395 | set_warning(DELETE_DIR_NOT_EMPTY); |
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396 | error(filename); |
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397 | } |
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398 | else |
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399 | retval = do_move(filename, stat_buf, status); |
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400 | |
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401 | if (retval) |
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402 | status = retval; |
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403 | |
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404 | return status; |
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405 | } |
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406 | |
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407 | |
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408 | |
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409 | |
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410 | |
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411 | |
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412 | do_move(filename, stat_buf, subs_not_deleted) |
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413 | char *filename; |
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414 | struct stat stat_buf; |
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415 | int subs_not_deleted; /* If the file in question is a directory, and */ |
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416 | /* there is something underneath it that hasn't */ |
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417 | /* been removed, this will be set to true. */ |
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418 | /* The program asks if the user wants to delete */ |
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419 | /* the directory, and if the user says yes, */ |
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420 | /* checks the value of subs_not_deleted. If */ |
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421 | /* it's true, an error results. */ |
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422 | /* This is used only when emulating rm. */ |
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423 | { |
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424 | char *last; |
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425 | char buf[MAXPATHLEN]; |
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426 | char name[MAXNAMLEN]; |
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427 | struct stat deleted_buf; |
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428 | |
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429 | (void) strncpy(buf, filename, MAXPATHLEN); |
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430 | last = lastpart(buf); |
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431 | if (strlen(last) > MAXNAMLEN) { |
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432 | if (emulate_rm && (! force)) |
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433 | fprintf(stderr, "%s: %s: filename too long\n", whoami, |
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434 | filename); |
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435 | set_error(ENAMETOOLONG); |
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436 | error(filename); |
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437 | return error_code; |
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438 | } |
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439 | (void) strcpy(name, last); |
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440 | if (strlen(buf) + 3 > MAXPATHLEN) { |
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441 | if (emulate_rm && (! force)) |
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442 | fprintf(stderr, "%s: %s: pathname too long\n", whoami, |
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443 | filename); |
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444 | set_error(ENAMETOOLONG); |
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445 | error(filename); |
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446 | return error_code; |
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447 | } |
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448 | *last = '\0'; |
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449 | (void) strcat(buf, ".#"); |
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450 | (void) strcat(buf, name); |
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451 | if (interactive) { |
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452 | printf("%s: remove %s? ", whoami, filename); |
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453 | if (! yes()) { |
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454 | set_status(DELETE_NOT_DELETED); |
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455 | return error_code; |
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456 | } |
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457 | } |
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458 | else if ((! force) |
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459 | #ifdef S_IFLNK |
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460 | && ((stat_buf.st_mode & S_IFMT) != S_IFLNK) |
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461 | #endif |
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462 | && access(filename, W_OK)) { |
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463 | if (emulate_rm) |
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464 | printf("%s: override protection %o for %s? ", whoami, |
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465 | stat_buf.st_mode & 0777, filename); |
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466 | else |
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467 | printf("%s: File %s not writeable. Delete anyway? ", whoami, |
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468 | filename); |
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469 | if (! yes()) { |
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470 | set_status(DELETE_NOT_DELETED); |
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471 | return error_code; |
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472 | } |
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473 | } |
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474 | if (emulate_rm && subs_not_deleted) { |
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475 | if (! force) |
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476 | fprintf(stderr, "%s: %s not removed\n", whoami, filename); |
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477 | return 1; |
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478 | } |
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479 | if (noop) { |
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480 | fprintf(stderr, "%s: %s would be removed\n", whoami, filename); |
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481 | return 0; |
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482 | } |
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483 | if ((! lstat(buf, &deleted_buf)) && unlink_completely(buf)) { |
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484 | if (emulate_rm && (! force)) |
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485 | fprintf(stderr, "%s: %s not removed\n", whoami, filename); |
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486 | error(filename); |
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487 | return error_code; |
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488 | } |
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489 | if (rename(filename, buf)) { |
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490 | if (emulate_rm && (! force)) |
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491 | fprintf(stderr, "%s: %s not removed\n", whoami, filename); |
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492 | set_error(errno); |
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493 | error(filename); |
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494 | return error_code; |
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495 | } |
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496 | else { |
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497 | if (verbose) |
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498 | fprintf(stderr, "%s: %s removed\n", whoami, filename); |
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499 | #ifdef AFS_MOUNTPOINTS |
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500 | /* |
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501 | * Normally, expunge uses the ctime to determine how long |
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502 | * ago a file was deleted (since the ctime is normally |
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503 | * updated when a file is renamed). However, in AFS, |
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504 | * renaming a file does not change the ctime, mtime OR |
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505 | * atime, so we have to use utimes to force the change. |
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506 | * This unfortunately causes the loss of the real mtime, but |
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507 | * there's nothing we can do about that, if we want expunge |
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508 | * to be able to do the right thing. |
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509 | * |
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510 | * Don't bother checking for errors, because we can't do |
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511 | * anything about them anyway, and in any case, this isn't a |
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512 | * *really* important operation. |
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513 | */ |
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514 | utimes(buf, tvp); |
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515 | #endif |
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516 | return 0; |
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517 | } |
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518 | } |
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519 | |
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520 | |
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521 | |
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522 | unlink_completely(filename) |
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523 | char *filename; |
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524 | { |
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525 | char buf[MAXPATHLEN]; |
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526 | struct stat stat_buf; |
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527 | DIR *dirp; |
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528 | struct dirent *dp; |
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529 | int status = 0; |
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530 | int retval; |
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531 | |
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532 | if (lstat(filename, &stat_buf)) { |
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533 | set_error(errno); |
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534 | error(filename); |
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535 | return error_code; |
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536 | } |
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537 | |
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538 | if ((stat_buf.st_mode & S_IFMT) == S_IFDIR) { |
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539 | dirp = Opendir(filename); |
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540 | if (! dirp) { |
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541 | set_error(errno); |
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542 | error(filename); |
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543 | return error_code; |
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544 | } |
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545 | |
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546 | for (dp = readdir(dirp); dp != NULL; dp = readdir(dirp)) { |
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547 | if (is_dotfile(dp->d_name)) |
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548 | continue; |
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549 | (void) strcpy(buf, append(filename, dp->d_name)); |
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550 | if (! *buf) { |
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551 | status = error_code; |
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552 | error(filename); |
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553 | continue; |
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554 | } |
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555 | retval = unlink_completely(buf); |
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556 | if (retval) { |
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557 | status = retval; |
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558 | error(filename); |
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559 | } |
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560 | } |
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561 | closedir(dirp); |
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562 | |
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563 | if (status) |
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564 | return status; |
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565 | |
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566 | retval = rmdir(filename); |
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567 | if (retval) { |
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568 | set_error(errno); |
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569 | error(filename); |
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570 | return errno; |
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571 | } |
---|
572 | } |
---|
573 | else { |
---|
574 | retval = unlink(filename); |
---|
575 | if (retval) { |
---|
576 | set_error(errno); |
---|
577 | error(filename); |
---|
578 | return error_code; |
---|
579 | } |
---|
580 | else |
---|
581 | return 0; |
---|
582 | } |
---|
583 | return 0; |
---|
584 | } |
---|