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: jik $ |
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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-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_delete_c[] = "$Header: /afs/dev.mit.edu/source/repository/athena/bin/delete/delete.c,v 1.16 1989-03-08 09:57:54 jik 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 | #include <stdio.h> |
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19 | #include <sys/stat.h> |
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20 | #include <sys/dir.h> |
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21 | #include <strings.h> |
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22 | #include <sys/param.h> |
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23 | #include <sys/file.h> |
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24 | #include "util.h" |
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25 | #include "delete.h" |
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26 | |
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27 | |
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28 | |
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29 | |
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30 | |
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31 | /* |
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32 | * ALGORITHM: |
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33 | * |
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34 | * 1. Parse command-line arguments and set flags. |
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35 | * 2. Call the function delete() for each filename command-line argument. |
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36 | * |
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37 | * delete(): |
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38 | * |
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39 | * 1. Can the file be lstat'd? |
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40 | * no -- abort |
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41 | * yes -- continue |
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42 | * 2. Is the file a directory? |
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43 | * yes -- is it a dotfile? |
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44 | * yes -- abort |
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45 | * no -- continue |
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46 | * -- is the filesonly option set? |
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47 | * yes -- is the recursive option specified? |
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48 | * yes -- continue |
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49 | * no -- abort |
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50 | * no -- is the directory empty? |
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51 | * yes -- remove it |
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52 | * no -- is the directoriesonly option set? |
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53 | * yes -- abort |
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54 | * no -- continue |
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55 | * -- is the recursive option specified? |
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56 | * yes -- continue |
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57 | * no -- abort |
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58 | * no -- is the directoriesonly option set? |
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59 | * yes -- abort |
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60 | * no -- continue |
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61 | * 3. If the file is a file, remove it. |
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62 | * 4. If the file is a directory, open it and pass each of its members |
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63 | * (excluding . files) to delete(). |
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64 | */ |
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65 | |
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66 | |
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67 | int force, interactive, recursive, noop, verbose, filesonly, directoriesonly; |
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68 | char *whoami; |
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69 | char *malloc(); |
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70 | |
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71 | main(argc, argv) |
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72 | int argc; |
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73 | char *argv[]; |
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74 | { |
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75 | extern char *optarg; |
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76 | extern int optind; |
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77 | int arg; |
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78 | int status = 0; |
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79 | |
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80 | whoami = lastpart(argv[0]); |
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81 | |
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82 | force = interactive = recursive = noop = verbose = filesonly = |
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83 | directoriesonly = 0; |
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84 | while ((arg = getopt(argc, argv, "firnvFD")) != -1) { |
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85 | switch (arg) { |
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86 | case 'r': |
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87 | recursive++; |
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88 | if (directoriesonly) { |
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89 | fprintf(stderr, "%s: -r and -D are mutually exclusive.\n", |
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90 | whoami); |
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91 | usage(); |
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92 | exit(! force); |
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93 | } |
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94 | break; |
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95 | case 'f': |
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96 | force++; |
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97 | break; |
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98 | case 'i': |
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99 | interactive++; |
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100 | break; |
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101 | case 'n': |
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102 | noop++; |
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103 | break; |
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104 | case 'v': |
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105 | verbose++; |
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106 | break; |
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107 | case 'F': |
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108 | filesonly++; |
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109 | if (directoriesonly) { |
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110 | fprintf(stderr, "%s: -F and -D are mutually exclusive.\n", |
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111 | whoami); |
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112 | usage(); |
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113 | exit(! force); |
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114 | } |
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115 | break; |
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116 | case 'D': |
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117 | directoriesonly++; |
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118 | if (recursive) { |
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119 | fprintf(stderr, "%s: -r and -D are mutually exclusive.\n", |
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120 | whoami); |
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121 | usage(); |
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122 | exit(! force); |
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123 | } |
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124 | if (filesonly) { |
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125 | fprintf(stderr, "%s: -F and -D are mutually exclusive.\n", |
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126 | whoami); |
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127 | usage(); |
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128 | exit(! force); |
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129 | } |
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130 | break; |
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131 | default: |
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132 | usage(); |
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133 | exit(! force); |
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134 | } |
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135 | } |
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136 | if (optind == argc) { |
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137 | fprintf(stderr, "%s: no files specified.\n", whoami); |
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138 | usage(); |
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139 | exit(! force); |
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140 | } |
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141 | while (optind < argc) { |
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142 | status = status | delete(argv[optind], 0); |
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143 | optind++; |
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144 | } |
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145 | exit((! force) && (status & ERROR_MASK)); |
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146 | } |
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147 | |
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148 | |
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149 | |
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150 | |
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151 | usage() |
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152 | { |
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153 | printf("Usage: %s [ options ] filename ...\n", whoami); |
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154 | printf("Options are:\n"); |
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155 | printf(" -r recursive\n"); |
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156 | printf(" -i interactive\n"); |
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157 | printf(" -f force\n"); |
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158 | printf(" -n noop\n"); |
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159 | printf(" -v verbose\n"); |
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160 | printf(" -F files only\n"); |
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161 | printf(" -D directories only\n"); |
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162 | printf(" -- end options and start filenames\n"); |
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163 | printf("-r and -D are mutually exclusive\n"); |
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164 | printf("-F and -D are mutually exclusive\n"); |
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165 | } |
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166 | |
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167 | |
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168 | |
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169 | |
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170 | |
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171 | |
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172 | delete(filename, recursed) |
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173 | char *filename; |
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174 | int recursed; |
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175 | { |
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176 | struct stat stat_buf; |
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177 | |
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178 | /* can the file be lstat'd? */ |
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179 | if (lstat(filename, &stat_buf) == -1) { |
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180 | if (! force) |
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181 | fprintf(stderr, "%s: %s nonexistent\n", whoami, filename); |
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182 | return(ERROR_MASK); |
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183 | } |
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184 | |
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185 | /* is the file a directory? */ |
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186 | if ((stat_buf.st_mode & S_IFMT) == S_IFDIR) { |
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187 | /* is the file a dot file? */ |
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188 | if (is_dotfile(filename)) { |
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189 | if (! force) |
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190 | fprintf(stderr, "%s: cannot remove `.' or `..'\n", |
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191 | whoami); |
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192 | return(ERROR_MASK); |
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193 | } |
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194 | /* is the filesonly option set? */ |
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195 | if (filesonly) { |
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196 | /* is the recursive option specified? */ |
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197 | if (recursive) { |
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198 | return(recursive_delete(filename, stat_buf, recursed)); |
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199 | } |
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200 | else { |
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201 | if (! force) |
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202 | fprintf(stderr, "%s: %s directory\n", whoami, |
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203 | filename); |
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204 | return(ERROR_MASK); |
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205 | } |
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206 | } |
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207 | else { |
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208 | /* is the directory empty? */ |
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209 | if (empty_directory(filename)) { |
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210 | /* remove it */ |
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211 | return(do_move(filename, stat_buf, 0)); |
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212 | } |
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213 | else { |
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214 | /* is the directoriesonly option set? */ |
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215 | if (directoriesonly) { |
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216 | if (! force) |
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217 | fprintf(stderr, "%s: %s: Directory not empty\n", |
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218 | whoami, filename); |
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219 | return(ERROR_MASK); |
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220 | } |
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221 | else { |
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222 | /* is the recursive option specified? */ |
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223 | if (recursive) { |
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224 | return(recursive_delete(filename, stat_buf, |
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225 | recursed)); |
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226 | } |
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227 | else { |
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228 | if (! force) |
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229 | fprintf(stderr, "%s: %s not empty\n", |
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230 | whoami, filename); |
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231 | return(ERROR_MASK); |
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232 | } |
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233 | } |
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234 | } |
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235 | } |
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236 | } |
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237 | else { |
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238 | /* is the directoriesonly option set? */ |
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239 | if (directoriesonly) { |
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240 | if (! force) |
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241 | fprintf(stderr, "%s: %s: Not a directory\n", whoami, |
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242 | filename); |
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243 | return(ERROR_MASK); |
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244 | } |
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245 | else |
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246 | return(do_move(filename, stat_buf, 0)); |
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247 | } |
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248 | } |
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249 | |
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250 | |
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251 | |
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252 | |
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253 | empty_directory(filename) |
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254 | char *filename; |
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255 | { |
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256 | DIR *dirp; |
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257 | struct direct *dp; |
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258 | |
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259 | dirp = opendir(filename); |
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260 | if (! dirp) { |
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261 | return(0); |
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262 | } |
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263 | for (dp = readdir(dirp); dp != NULL; dp = readdir(dirp)) { |
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264 | if (is_dotfile(dp->d_name)) |
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265 | continue; |
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266 | if (is_deleted(dp->d_name)) |
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267 | continue; |
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268 | else { |
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269 | closedir(dirp); |
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270 | return(0); |
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271 | } |
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272 | } |
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273 | closedir(dirp); |
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274 | return(1); |
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275 | } |
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276 | |
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277 | |
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278 | |
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279 | |
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280 | recursive_delete(filename, stat_buf, recursed) |
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281 | char *filename; |
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282 | struct stat stat_buf; |
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283 | int recursed; |
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284 | { |
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285 | DIR *dirp; |
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286 | struct direct *dp; |
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287 | int status = 0; |
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288 | char newfile[MAXPATHLEN]; |
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289 | |
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290 | if (interactive && recursed) { |
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291 | printf("%s: remove directory %s? ", whoami, filename); |
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292 | if (! yes()) |
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293 | return(NO_DELETE_MASK); |
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294 | } |
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295 | dirp = opendir(filename); |
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296 | if (! dirp) { |
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297 | if (! force) |
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298 | fprintf(stderr, "%s: %s not changed\n", whoami, filename); |
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299 | return(ERROR_MASK); |
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300 | } |
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301 | for (dp = readdir(dirp); dp != NULL; dp = readdir(dirp)) { |
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302 | if (is_dotfile(dp->d_name)) |
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303 | continue; |
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304 | if (is_deleted(dp->d_name)) |
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305 | continue; |
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306 | else { |
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307 | strcpy(newfile, append(filename, dp->d_name, !force)); |
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308 | if (*newfile) |
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309 | status = status | delete(newfile, 1); |
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310 | else |
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311 | status = ERROR_MASK; |
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312 | } |
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313 | } |
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314 | closedir(dirp); |
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315 | status = status | do_move(filename, stat_buf, status); |
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316 | return(status); |
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317 | } |
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318 | |
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319 | |
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320 | |
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321 | |
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322 | |
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323 | |
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324 | do_move(filename, stat_buf, err_mask) |
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325 | char *filename; |
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326 | struct stat stat_buf; |
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327 | int err_mask; |
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328 | { |
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329 | char *last; |
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330 | char buf[MAXPATHLEN]; |
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331 | char name[MAXNAMLEN]; |
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332 | struct stat deleted_buf; |
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333 | |
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334 | strncpy(buf, filename, MAXPATHLEN); |
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335 | last = lastpart(buf); |
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336 | if (strlen(last) > MAXNAMLEN) { |
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337 | if (! force) |
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338 | fprintf(stderr, "%s: %s: filename too long\n", whoami, |
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339 | filename); |
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340 | return(ERROR_MASK); |
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341 | } |
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342 | strcpy(name, last); |
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343 | if (strlen(buf) + 3 > MAXPATHLEN) { |
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344 | if (! force) |
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345 | fprintf(stderr, "%s: %s: pathname too long\n", whoami, |
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346 | filename); |
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347 | return(ERROR_MASK); |
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348 | } |
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349 | *last = '\0'; |
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350 | strcat(buf, ".#"); |
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351 | strcat(buf, name); |
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352 | if (err_mask) { |
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353 | if (! force) |
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354 | fprintf(stderr, "%s: %s not removed\n", whoami, filename); |
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355 | return(err_mask); |
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356 | } |
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357 | if (interactive) { |
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358 | printf("%s: remove %s? ", whoami, filename); |
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359 | if (! yes()) |
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360 | return(NO_DELETE_MASK); |
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361 | } |
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362 | else if ((! force) && ((stat_buf.st_mode & S_IFMT) != S_IFLNK) |
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363 | && access(filename, W_OK)) { |
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364 | printf("%s: override protection %o for %s? ", whoami, |
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365 | stat_buf.st_mode & 0777, filename); |
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366 | if (! yes()) |
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367 | return(NO_DELETE_MASK); |
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368 | } |
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369 | if (noop) { |
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370 | fprintf(stderr, "%s: %s would be removed\n", whoami, filename); |
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371 | return(0); |
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372 | } |
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373 | if (! lstat(buf, &deleted_buf)) |
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374 | unlink_completely(buf); |
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375 | if (rename(filename, buf)) { |
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376 | if (! force) |
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377 | fprintf(stderr, "%s: %s not removed\n", whoami, filename); |
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378 | return(ERROR_MASK); |
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379 | } |
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380 | else { |
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381 | if (verbose) |
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382 | fprintf(stderr, "%s: %s removed\n", whoami, filename); |
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383 | return(0); |
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384 | } |
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385 | } |
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386 | |
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387 | |
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388 | |
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389 | unlink_completely(filename) |
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390 | char *filename; |
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391 | { |
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392 | char buf[MAXPATHLEN]; |
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393 | struct stat stat_buf; |
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394 | DIR *dirp; |
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395 | struct direct *dp; |
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396 | int status = 0; |
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397 | |
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398 | if (lstat(filename, &stat_buf)) |
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399 | return(1); |
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400 | |
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401 | if ((stat_buf.st_mode & S_IFMT) == S_IFDIR) { |
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402 | dirp = opendir(filename); |
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403 | if (! dirp) |
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404 | return(1); |
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405 | readdir(dirp); readdir(dirp); /* get rid of . and .. */ |
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406 | for (dp = readdir(dirp); dp != NULL; dp = readdir(dirp)) { |
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407 | strcpy(buf, append(filename, dp->d_name, 0)); |
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408 | if (! buf) { |
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409 | status = 1; |
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410 | continue; |
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411 | } |
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412 | status = status | unlink_completely(buf); |
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413 | } |
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414 | closedir(dirp); |
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415 | status = status | rmdir(filename); |
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416 | return(status); |
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417 | } |
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418 | else |
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419 | return(unlink(filename) == -1); |
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420 | } |
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421 | |
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