1 | /* |
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2 | * $Source: /afs/dev.mit.edu/source/repository/athena/bin/delete/directories.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_directories_c = "$Header: /afs/dev.mit.edu/source/repository/athena/bin/delete/directories.c,v 1.6 1989-01-27 03:13:24 jik Exp $"; |
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15 | #endif |
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16 | |
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17 | /* |
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18 | * Things that needed to be added: |
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19 | * |
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20 | * 1) Check to see if the cwd is /, and if so, use only one root node. |
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21 | */ |
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22 | |
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23 | |
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24 | #include <sys/types.h> |
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25 | #include <sys/stat.h> |
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26 | #include <sys/param.h> |
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27 | #include <sys/dir.h> |
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28 | #include <strings.h> |
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29 | #include <errno.h> |
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30 | #include "directories.h" |
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31 | #include "util.h" |
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32 | |
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33 | extern char *malloc(), *realloc(); |
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34 | extern char *whoami; |
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35 | extern int errno; |
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36 | |
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37 | static filerec root_tree; |
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38 | static filerec cwd_tree; |
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39 | static char *error_buf; |
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40 | |
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41 | |
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42 | |
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43 | static filerec default_cwd = { |
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44 | ".", |
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45 | FtDirectory, |
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46 | (filerec *) NULL, |
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47 | (filerec *) NULL, |
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48 | (filerec *) NULL, |
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49 | (filerec *) NULL, |
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50 | (filerec *) NULL, |
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51 | False, |
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52 | False |
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53 | }; |
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54 | |
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55 | static filerec default_root = { |
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56 | "", |
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57 | FtDirectory, |
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58 | (filerec *) NULL, |
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59 | (filerec *) NULL, |
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60 | (filerec *) NULL, |
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61 | (filerec *) NULL, |
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62 | (filerec *) NULL, |
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63 | False, |
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64 | False |
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65 | }; |
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66 | |
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67 | static filerec default_directory = { |
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68 | "", |
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69 | FtDirectory, |
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70 | (filerec *) NULL, |
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71 | (filerec *) NULL, |
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72 | (filerec *) NULL, |
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73 | (filerec *) NULL, |
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74 | (filerec *) NULL, |
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75 | False, |
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76 | False |
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77 | }; |
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78 | |
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79 | static filerec default_file = { |
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80 | "", |
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81 | FtFile, |
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82 | (filerec *) NULL, |
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83 | (filerec *) NULL, |
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84 | (filerec *) NULL, |
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85 | (filerec *) NULL, |
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86 | (filerec *) NULL, |
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87 | False, |
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88 | False |
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89 | }; |
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90 | |
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91 | |
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92 | filerec *get_root_tree() |
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93 | { |
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94 | return(&root_tree); |
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95 | } |
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96 | |
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97 | |
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98 | |
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99 | filerec *get_cwd_tree() |
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100 | { |
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101 | return(&cwd_tree); |
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102 | } |
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103 | |
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104 | |
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105 | initialize_tree() |
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106 | { |
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107 | root_tree = default_root; |
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108 | cwd_tree = default_cwd; |
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109 | |
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110 | error_buf = (char *) malloc(MAXPATHLEN + strlen(whoami) + 5); |
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111 | if (! error_buf) { |
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112 | perror(whoami); |
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113 | return(1); |
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114 | } |
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115 | return(0); |
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116 | } |
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117 | |
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118 | |
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119 | filerec *add_path_to_tree(path, ftype) |
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120 | char *path; |
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121 | filetype ftype; |
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122 | { |
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123 | filerec *parent, *leaf; |
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124 | char next_name[MAXNAMLEN]; |
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125 | char lpath[MAXPATHLEN], *ptr; |
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126 | |
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127 | ptr = strcpy(lpath, path); /* we don't want to damage the user's string */ |
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128 | if (ftype == FtUnknown) |
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129 | ftype = find_file_type(ptr); |
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130 | |
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131 | if (*ptr == '/') { |
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132 | parent = &root_tree; |
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133 | ptr++; |
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134 | } |
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135 | else if (! strncmp(ptr, "./", 2)) { |
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136 | parent = &cwd_tree; |
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137 | ptr += 2; |
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138 | } |
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139 | else |
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140 | parent = &cwd_tree; |
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141 | |
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142 | strcpy(next_name, firstpart(ptr, ptr)); |
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143 | while (*ptr) { |
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144 | parent = add_directory_to_parent(parent, next_name, False); |
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145 | if (! parent) { |
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146 | perror(whoami); |
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147 | return ((filerec *) NULL); |
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148 | } |
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149 | strcpy(next_name, firstpart(ptr, ptr)); |
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150 | } |
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151 | if (ftype == FtFile) |
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152 | leaf = add_file_to_parent(parent, next_name, True); |
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153 | else |
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154 | leaf = add_directory_to_parent(parent, next_name, True); |
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155 | |
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156 | if (! leaf) { |
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157 | perror(whoami); |
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158 | return ((filerec *) NULL); |
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159 | } |
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160 | return(leaf); |
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161 | } |
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162 | |
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163 | |
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164 | |
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165 | |
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166 | filetype find_file_type(path) |
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167 | char *path; |
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168 | { |
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169 | struct stat buf; |
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170 | |
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171 | if ((path[strlen(path) - 1] == '/') && (strlen(path) != 1)) |
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172 | path[strlen(path) - 1] = '\0'; |
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173 | if (lstat(path, &buf)) |
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174 | return (FtUnknown); |
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175 | else if (buf.st_mode & S_IFDIR) |
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176 | return (FtDirectory); |
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177 | else |
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178 | return (FtFile); |
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179 | } |
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180 | |
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181 | |
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182 | |
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183 | filerec *next_leaf(leaf) |
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184 | filerec *leaf; |
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185 | { |
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186 | filerec *new; |
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187 | |
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188 | if (leaf->ftype == FtDirectory) { |
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189 | new = first_in_directory(leaf); |
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190 | if (new) |
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191 | return(new); |
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192 | new = next_directory(leaf); |
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193 | return(new); |
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194 | } |
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195 | else { |
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196 | new = next_in_directory(leaf); |
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197 | return(new); |
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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 | filerec *next_specified_leaf(leaf) |
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203 | filerec *leaf; |
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204 | { |
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205 | while (leaf = next_leaf(leaf)) |
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206 | if (leaf->specified) |
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207 | return(leaf); |
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208 | return((filerec *) NULL); |
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209 | } |
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210 | |
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211 | |
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212 | filerec *next_directory(leaf) |
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213 | filerec *leaf; |
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214 | { |
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215 | filerec *ret; |
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216 | if (leaf->ftype == FtFile) |
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217 | leaf = leaf->parent; |
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218 | if (leaf) |
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219 | ret = leaf->next; |
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220 | else |
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221 | ret = (filerec *) NULL; |
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222 | if (ret) if (ret->freed) |
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223 | ret = next_directory(ret); |
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224 | return(ret); |
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225 | } |
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226 | |
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227 | |
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228 | filerec *next_specified_directory(leaf) |
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229 | filerec *leaf; |
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230 | { |
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231 | while (leaf = next_directory(leaf)) |
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232 | if (leaf->specified) |
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233 | return(leaf); |
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234 | return ((filerec *) NULL); |
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235 | } |
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236 | |
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237 | |
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238 | |
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239 | filerec *next_in_directory(leaf) |
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240 | filerec *leaf; |
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241 | { |
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242 | filerec *ret; |
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243 | |
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244 | if (leaf->next) |
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245 | ret = leaf->next; |
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246 | else if ((leaf->ftype == FtFile) && leaf->parent) |
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247 | ret = leaf->parent->dirs; |
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248 | else |
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249 | ret = (filerec *) NULL; |
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250 | if (ret) if (ret->freed) |
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251 | ret = next_in_directory(ret); |
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252 | return (ret); |
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253 | } |
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254 | |
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255 | |
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256 | |
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257 | |
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258 | filerec *next_specified_in_directory(leaf) |
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259 | filerec *leaf; |
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260 | { |
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261 | while (leaf = next_in_directory(leaf)) |
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262 | if (leaf->specified) |
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263 | return(leaf); |
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264 | return ((filerec *) NULL); |
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265 | } |
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266 | |
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267 | |
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268 | |
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269 | filerec *first_in_directory(leaf) |
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270 | filerec *leaf; |
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271 | { |
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272 | filerec *ret; |
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273 | |
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274 | if (leaf->ftype != FtDirectory) |
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275 | ret = (filerec *) NULL; |
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276 | else if (leaf->files) |
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277 | ret = leaf->files; |
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278 | else if (leaf->dirs) |
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279 | ret = leaf->dirs; |
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280 | else |
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281 | ret = (filerec *) NULL; |
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282 | if (ret) if (ret->freed) |
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283 | ret = next_in_directory(ret); |
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284 | return(ret); |
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285 | } |
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286 | |
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287 | |
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288 | filerec *first_specified_in_directory(leaf) |
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289 | filerec *leaf; |
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290 | { |
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291 | leaf = first_in_directory(leaf); |
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292 | |
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293 | if (! leaf) |
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294 | return((filerec *) NULL); |
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295 | |
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296 | if (leaf->specified) |
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297 | return(leaf); |
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298 | else |
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299 | leaf = next_specified_in_directory(leaf); |
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300 | return ((filerec *) NULL); |
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301 | } |
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302 | |
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303 | |
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304 | print_paths_from(leaf) |
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305 | filerec *leaf; |
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306 | { |
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307 | char buf[MAXPATHLEN]; |
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308 | |
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309 | printf("%s\n", get_leaf_path(leaf, buf)); |
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310 | if (leaf->dirs) |
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311 | print_paths_from(leaf->dirs); |
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312 | if (leaf->files) |
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313 | print_paths_from(leaf->files); |
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314 | if (leaf->next) |
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315 | print_paths_from(leaf->next); |
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316 | return(0); |
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317 | } |
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318 | |
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319 | |
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320 | print_specified_paths_from(leaf) |
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321 | filerec *leaf; |
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322 | { |
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323 | char buf[MAXPATHLEN]; |
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324 | |
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325 | if (leaf->specified) |
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326 | printf("%s\n", get_leaf_path(leaf, buf)); |
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327 | if (leaf->dirs) |
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328 | print_specified_paths_from(leaf->dirs); |
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329 | if (leaf->files) |
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330 | print_specified_paths_from(leaf->files); |
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331 | if (leaf->next) |
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332 | print_specified_paths_from(leaf->next); |
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333 | return(0); |
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334 | } |
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335 | |
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336 | |
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337 | filerec *add_file_to_parent(parent, name, specified) |
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338 | filerec *parent; |
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339 | char *name; |
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340 | Boolean specified; |
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341 | { |
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342 | filerec *files, *last = (filerec *) NULL; |
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343 | |
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344 | files = parent->files; |
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345 | while (files) { |
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346 | if (! strcmp(files->name, name)) |
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347 | break; |
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348 | last = files; |
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349 | files = files->next; |
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350 | } |
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351 | if (files) { |
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352 | files->specified = (files->specified || specified); |
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353 | return(files); |
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354 | } |
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355 | if (last) { |
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356 | last->next = (filerec *) malloc(sizeof(filerec)); |
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357 | if (! last->next) { |
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358 | perror(whoami); |
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359 | return((filerec *) NULL); |
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360 | } |
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361 | *last->next = default_file; |
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362 | last->next->previous = last; |
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363 | last->next->parent = parent; |
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364 | last = last->next; |
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365 | } |
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366 | else { |
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367 | parent->files = (filerec *) malloc(sizeof(filerec)); |
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368 | if (! parent->files) { |
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369 | perror(whoami); |
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370 | return((filerec *) NULL); |
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371 | } |
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372 | *parent->files = default_file; |
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373 | parent->files->parent = parent; |
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374 | parent->files->previous = (filerec *) NULL; |
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375 | last = parent->files; |
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376 | } |
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377 | strcpy(last->name, name); |
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378 | last->specified = specified; |
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379 | return(last); |
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380 | } |
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381 | |
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382 | |
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383 | |
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384 | |
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385 | |
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386 | filerec *add_directory_to_parent(parent, name, specified) |
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387 | filerec *parent; |
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388 | char *name; |
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389 | Boolean specified; |
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390 | { |
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391 | filerec *directories, *last = (filerec *) NULL; |
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392 | |
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393 | directories = parent->dirs; |
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394 | while (directories) { |
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395 | if (! strcmp(directories->name, name)) |
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396 | break; |
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397 | last = directories; |
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398 | directories = directories->next; |
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399 | } |
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400 | if (directories) { |
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401 | directories->specified = (directories->specified || specified); |
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402 | return(directories); |
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403 | } |
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404 | if (last) { |
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405 | last->next = (filerec *) malloc(sizeof(filerec)); |
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406 | if (! last->next) { |
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407 | perror(whoami); |
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408 | return((filerec *) NULL); |
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409 | } |
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410 | *last->next = default_directory; |
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411 | last->next->previous = last; |
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412 | last->next->parent = parent; |
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413 | last = last->next; |
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414 | } |
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415 | else { |
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416 | parent->dirs = (filerec *) malloc(sizeof(filerec)); |
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417 | if (! parent->dirs) { |
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418 | perror(whoami); |
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419 | return((filerec *) NULL); |
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420 | } |
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421 | *parent->dirs = default_directory; |
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422 | parent->dirs->parent = parent; |
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423 | parent->dirs->previous = (filerec *) NULL; |
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424 | last = parent->dirs; |
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425 | } |
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426 | strcpy(last->name, name); |
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427 | last->specified = specified; |
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428 | return(last); |
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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 | free_leaf(leaf) |
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436 | filerec *leaf; |
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437 | { |
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438 | leaf->freed = True; |
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439 | if (! (leaf->dirs || leaf->files)) { |
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440 | if (leaf->previous) |
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441 | leaf->previous->next = leaf->next; |
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442 | if (leaf->next) |
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443 | leaf->next->previous = leaf->previous; |
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444 | if (leaf->ftype == FtDirectory) { |
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445 | if (leaf->parent->dirs == leaf) { |
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446 | leaf->parent->dirs = leaf->next; |
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447 | if (leaf->parent->freed) |
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448 | free_leaf(leaf->parent); |
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449 | } |
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450 | } |
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451 | else { |
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452 | if (leaf->parent->files == leaf) { |
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453 | leaf->parent->files = leaf->next; |
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454 | if (leaf->parent->freed) |
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455 | free_leaf(leaf->parent); |
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456 | } |
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457 | } |
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458 | if (leaf->parent) { /* we don't want to call this on a tree root! */ |
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459 | free(leaf); |
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460 | } |
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461 | } |
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462 | return(0); |
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463 | } |
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464 | |
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465 | |
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466 | |
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467 | filerec *find_child(directory, name) |
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468 | filerec *directory; |
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469 | char *name; |
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470 | { |
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471 | filerec *ptr; |
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472 | |
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473 | if (directory->ftype != FtDirectory) |
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474 | return ((filerec *) NULL); |
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475 | ptr = directory->dirs; |
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476 | while (ptr) |
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477 | if (strcmp(ptr->name, name)) |
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478 | ptr = ptr->next; |
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479 | else |
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480 | break; |
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481 | if (ptr) |
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482 | return (ptr); |
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483 | ptr = directory->files; |
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484 | while (ptr) |
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485 | if (strcmp(ptr->name, name)) |
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486 | ptr = ptr->next; |
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487 | else |
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488 | break; |
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489 | if (ptr) |
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490 | return (ptr); |
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491 | return ((filerec *) NULL); |
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492 | } |
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493 | |
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494 | |
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495 | change_path(old_path, new_path) |
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496 | char *old_path, *new_path; |
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497 | { |
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498 | char next_old[MAXNAMLEN], next_new[MAXNAMLEN]; |
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499 | char rest_old[MAXPATHLEN], rest_new[MAXPATHLEN]; |
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500 | |
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501 | filerec *current; |
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502 | |
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503 | if (*old_path == '/') { |
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504 | current = &root_tree; |
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505 | old_path++; |
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506 | new_path++; |
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507 | } |
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508 | else if (! strncmp(old_path, "./", 2)) { |
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509 | current = &cwd_tree; |
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510 | old_path += 2; |
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511 | new_path += 2; |
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512 | } |
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513 | else |
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514 | current = &cwd_tree; |
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515 | |
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516 | strcpy(next_old, firstpart(old_path, rest_old)); |
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517 | strcpy(next_new, firstpart(new_path, rest_new)); |
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518 | while (*next_old && *next_new) { |
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519 | current = find_child(current, next_old); |
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520 | if (current) |
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521 | strcpy(current->name, next_new); |
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522 | else |
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523 | return(1); |
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524 | strcpy(next_old, firstpart(rest_old, rest_old)); |
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525 | strcpy(next_new, firstpart(rest_new, rest_new)); |
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526 | } |
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527 | if (! (*next_old || *next_new)) |
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528 | return(0); |
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529 | else |
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530 | return(1); |
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531 | } |
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532 | |
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533 | |
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534 | char *get_leaf_path(leaf, leaf_buf) |
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535 | filerec *leaf; |
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536 | char leaf_buf[]; /* RETURN */ |
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537 | { |
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538 | char *name_ptr; |
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539 | |
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540 | name_ptr = malloc(1); |
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541 | *name_ptr = '\0'; |
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542 | do { |
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543 | name_ptr = realloc(name_ptr, strlen(leaf->name) + |
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544 | strlen(name_ptr) + 2); |
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545 | strcpy(leaf_buf, name_ptr); |
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546 | *name_ptr = '\0'; |
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547 | if (leaf->parent) |
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548 | strcat(name_ptr, "/"); |
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549 | strcat(name_ptr, leaf->name); |
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550 | strcat(name_ptr, leaf_buf); |
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551 | leaf = leaf->parent; |
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552 | } while (leaf); |
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553 | strcpy(leaf_buf, name_ptr); |
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554 | return(leaf_buf); |
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555 | } |
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