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 1.13 1989-10-23 13:40:43 jik Exp $"; |
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15 | #endif |
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16 | |
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17 | #include <stdio.h> |
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18 | #include <sys/types.h> |
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19 | #include <sys/stat.h> |
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20 | #include <sys/param.h> |
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21 | #include <sys/dir.h> |
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22 | #include <strings.h> |
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23 | #include <errno.h> |
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24 | #include <com_err.h> |
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25 | #include "delete_errs.h" |
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26 | #include "directories.h" |
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27 | #include "util.h" |
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28 | #include "mit-copyright.h" |
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29 | #include "errors.h" |
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30 | |
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31 | extern char *malloc(), *realloc(); |
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32 | extern long time(); |
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33 | extern int errno; |
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34 | |
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35 | static filerec root_tree; |
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36 | static filerec cwd_tree; |
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37 | |
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38 | /* these are not static because external routines need to be able to */ |
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39 | /* access them. */ |
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40 | long current_time; |
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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 | (filerec *) NULL, |
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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 | False, |
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51 | False, |
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52 | {0} |
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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 | (filerec *) NULL, |
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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 | False, |
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63 | False, |
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64 | {0} |
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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 | (filerec *) NULL, |
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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 | False, |
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75 | False, |
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76 | {0} |
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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 | (filerec *) NULL, |
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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 | False, |
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87 | False, |
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88 | {0} |
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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 | int initialize_tree() |
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106 | { |
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107 | int retval; |
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108 | |
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109 | root_tree = default_root; |
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110 | cwd_tree = default_cwd; |
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111 | |
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112 | current_time = time((time_t *)0); |
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113 | if (retval = get_specs(".", &cwd_tree.specs, FOLLOW_LINKS)) { |
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114 | error("get_specs on ."); |
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115 | return retval; |
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116 | } |
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117 | if (retval = get_specs("/", &root_tree.specs, FOLLOW_LINKS)) { |
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118 | error("get_specs on /"); |
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119 | return retval; |
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120 | } |
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121 | return 0; |
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122 | } |
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123 | |
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124 | |
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125 | int add_path_to_tree(path, leaf) |
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126 | char *path; |
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127 | filerec **leaf; |
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128 | { |
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129 | filerec *parent; |
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130 | char next_name[MAXNAMLEN]; |
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131 | char lpath[MAXPATHLEN], built_path[MAXPATHLEN], *ptr; |
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132 | struct stat specs; |
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133 | int retval; |
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134 | |
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135 | if (retval = get_specs(path, &specs, DONT_FOLLOW_LINKS)) { |
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136 | char error_buf[MAXPATHLEN+14]; |
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137 | |
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138 | (void) sprintf(error_buf, "get_specs on %s", path); |
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139 | error(error_buf); |
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140 | return retval; |
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141 | } |
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142 | |
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143 | (void) strcpy(lpath, path); /* we don't want to damage the user's */ |
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144 | /* string */ |
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145 | ptr = lpath; |
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146 | if (*ptr == '/') { |
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147 | parent = &root_tree; |
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148 | ptr++; |
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149 | (void) strcpy(built_path, "/"); |
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150 | } |
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151 | else if (! strncmp(ptr, "./", 2)) { |
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152 | parent = &cwd_tree; |
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153 | ptr += 2; |
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154 | *built_path = '\0'; |
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155 | } |
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156 | else { |
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157 | parent = &cwd_tree; |
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158 | *built_path = '\0'; |
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159 | } |
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160 | |
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161 | (void) strcpy(next_name, firstpart(ptr, ptr)); |
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162 | while (*ptr) { |
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163 | (void) strcat(built_path, next_name); |
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164 | if (retval = add_directory_to_parent(parent, next_name, False, |
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165 | &parent)) { |
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166 | error("add_directory_to_parent"); |
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167 | return retval; |
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168 | } |
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169 | (void) strcpy(next_name, firstpart(ptr, ptr)); |
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170 | if (retval = get_specs(built_path, &parent->specs, FOLLOW_LINKS)) { |
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171 | char error_buf[MAXPATHLEN+14]; |
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172 | |
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173 | (void) sprintf(error_buf, "get_specs on %s", built_path); |
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174 | error(error_buf); |
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175 | return retval; |
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176 | } |
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177 | (void) strcat(built_path, "/"); |
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178 | } |
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179 | if ((specs.st_mode & S_IFMT) == S_IFDIR) { |
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180 | retval = add_directory_to_parent(parent, next_name, True, leaf); |
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181 | if (retval) { |
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182 | error("add_directory_to_parent"); |
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183 | return retval; |
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184 | } |
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185 | } |
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186 | else { |
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187 | retval = add_file_to_parent(parent, next_name, True, leaf); |
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188 | if (retval) { |
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189 | error("add_file_to_parent"); |
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190 | return retval; |
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191 | } |
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192 | } |
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193 | |
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194 | (*leaf)->specs = specs; |
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195 | |
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196 | return 0; |
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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 | int get_specs(path, specs, follow) |
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203 | char *path; |
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204 | struct stat *specs; |
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205 | int follow; /* follow symlinks or not? */ |
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206 | { |
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207 | int status; |
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208 | |
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209 | if (strlen(path)) if ((path[strlen(path) - 1] == '/') && |
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210 | (strlen(path) != 1)) |
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211 | path[strlen(path) - 1] = '\0'; |
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212 | if (follow == FOLLOW_LINKS) |
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213 | status = stat(path, specs); |
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214 | else |
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215 | status = lstat(path, specs); |
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216 | |
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217 | if (status) { |
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218 | set_error(errno); |
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219 | error(path); |
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220 | return error_code; |
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221 | } |
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222 | |
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223 | return 0; |
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224 | } |
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225 | |
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226 | |
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227 | |
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228 | filerec *next_leaf(leaf) |
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229 | filerec *leaf; |
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230 | { |
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231 | filerec *new; |
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232 | |
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233 | if ((leaf->specs.st_mode & S_IFMT) == S_IFDIR) { |
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234 | new = first_in_directory(leaf); |
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235 | if (new) |
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236 | return(new); |
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237 | new = next_directory(leaf); |
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238 | return(new); |
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239 | } |
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240 | else { |
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241 | new = next_in_directory(leaf); |
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242 | return(new); |
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243 | } |
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244 | } |
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245 | |
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246 | |
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247 | filerec *next_specified_leaf(leaf) |
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248 | filerec *leaf; |
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249 | { |
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250 | while (leaf = next_leaf(leaf)) |
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251 | if (leaf->specified) |
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252 | return(leaf); |
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253 | return((filerec *) NULL); |
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254 | } |
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255 | |
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256 | |
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257 | filerec *next_directory(leaf) |
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258 | filerec *leaf; |
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259 | { |
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260 | filerec *ret; |
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261 | if ((leaf->specs.st_mode & S_IFMT) != S_IFDIR) |
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262 | leaf = leaf->parent; |
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263 | if (leaf) |
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264 | ret = leaf->next; |
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265 | else |
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266 | ret = (filerec *) NULL; |
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267 | if (ret) if (ret->freed) |
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268 | ret = next_directory(ret); |
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269 | return(ret); |
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270 | } |
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271 | |
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272 | |
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273 | filerec *next_specified_directory(leaf) |
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274 | filerec *leaf; |
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275 | { |
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276 | while (leaf = next_directory(leaf)) |
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277 | if (leaf->specified) |
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278 | return(leaf); |
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279 | return ((filerec *) NULL); |
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280 | } |
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281 | |
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282 | |
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283 | |
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284 | filerec *next_in_directory(leaf) |
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285 | filerec *leaf; |
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286 | { |
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287 | filerec *ret; |
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288 | |
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289 | if (leaf->next) |
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290 | ret = leaf->next; |
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291 | else if (((leaf->specs.st_mode & S_IFMT) != S_IFDIR) && leaf->parent) |
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292 | ret = leaf->parent->dirs; |
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293 | else |
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294 | ret = (filerec *) NULL; |
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295 | if (ret) if (ret->freed) |
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296 | ret = next_in_directory(ret); |
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297 | return (ret); |
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298 | } |
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299 | |
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300 | |
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301 | |
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302 | |
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303 | filerec *next_specified_in_directory(leaf) |
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304 | filerec *leaf; |
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305 | { |
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306 | while (leaf = next_in_directory(leaf)) |
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307 | if (leaf->specified) |
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308 | return(leaf); |
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309 | return ((filerec *) NULL); |
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310 | } |
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311 | |
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312 | |
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313 | |
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314 | filerec *first_in_directory(leaf) |
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315 | filerec *leaf; |
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316 | { |
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317 | filerec *ret; |
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318 | |
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319 | if ((leaf->specs.st_mode & S_IFMT) != S_IFDIR) |
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320 | ret = (filerec *) NULL; |
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321 | else if (leaf->files) |
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322 | ret = leaf->files; |
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323 | else if (leaf->dirs) |
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324 | ret = leaf->dirs; |
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325 | else |
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326 | ret = (filerec *) NULL; |
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327 | if (ret) if (ret->freed) |
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328 | ret = next_in_directory(ret); |
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329 | return(ret); |
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330 | } |
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331 | |
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332 | |
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333 | filerec *first_specified_in_directory(leaf) |
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334 | filerec *leaf; |
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335 | { |
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336 | leaf = first_in_directory(leaf); |
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337 | if (! leaf) |
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338 | return((filerec *) NULL); |
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339 | |
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340 | if (leaf->specified) |
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341 | return(leaf); |
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342 | else |
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343 | leaf = next_specified_in_directory(leaf); |
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344 | return (leaf); |
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345 | } |
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346 | |
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347 | |
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348 | print_paths_from(leaf) |
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349 | filerec *leaf; |
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350 | { |
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351 | char buf[MAXPATHLEN]; |
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352 | |
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353 | printf("%s\n", get_leaf_path(leaf, buf)); |
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354 | if (leaf->dirs) |
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355 | print_paths_from(leaf->dirs); |
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356 | if (leaf->files) |
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357 | print_paths_from(leaf->files); |
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358 | if (leaf->next) |
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359 | print_paths_from(leaf->next); |
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360 | return(0); |
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361 | } |
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362 | |
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363 | |
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364 | print_specified_paths_from(leaf) |
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365 | filerec *leaf; |
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366 | { |
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367 | char buf[MAXPATHLEN]; |
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368 | |
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369 | if (leaf->specified) |
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370 | printf("%s\n", get_leaf_path(leaf, buf)); |
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371 | if (leaf->dirs) |
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372 | print_specified_paths_from(leaf->dirs); |
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373 | if (leaf->files) |
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374 | print_specified_paths_from(leaf->files); |
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375 | if (leaf->next) |
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376 | print_specified_paths_from(leaf->next); |
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377 | return(0); |
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378 | } |
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379 | |
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380 | |
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381 | int add_file_to_parent(parent, name, specified, last) |
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382 | filerec *parent, **last; |
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383 | char *name; |
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384 | Boolean specified; |
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385 | { |
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386 | filerec *files; |
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387 | |
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388 | *last = files = (filerec *) NULL; |
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389 | files = parent->files; |
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390 | while (files) { |
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391 | if (! strcmp(files->name, name)) |
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392 | break; |
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393 | *last = files; |
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394 | files = files->next; |
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395 | } |
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396 | if (files) { |
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397 | files->specified = (files->specified || specified); |
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398 | *last = files; |
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399 | return 0; |
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400 | } |
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401 | if (*last) { |
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402 | (*last)->next = (filerec *) malloc((unsigned) sizeof(filerec)); |
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403 | if (! (*last)->next) { |
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404 | set_error(errno); |
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405 | error("malloc"); |
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406 | return error_code; |
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407 | } |
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408 | *(*last)->next = default_file; |
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409 | (*last)->next->previous = *last; |
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410 | (*last)->next->parent = parent; |
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411 | (*last) = (*last)->next; |
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412 | } |
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413 | else { |
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414 | parent->files = (filerec *) malloc(sizeof(filerec)); |
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415 | if (! parent->files) { |
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416 | set_error(errno); |
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417 | error("malloc"); |
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418 | return error_code; |
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419 | } |
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420 | *parent->files = default_file; |
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421 | parent->files->parent = parent; |
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422 | parent->files->previous = (filerec *) NULL; |
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423 | *last = parent->files; |
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424 | } |
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425 | (void) strcpy((*last)->name, name); |
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426 | (*last)->specified = specified; |
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427 | return 0; |
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428 | } |
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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 | int add_directory_to_parent(parent, name, specified, last) |
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435 | filerec *parent, **last; |
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436 | char *name; |
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437 | Boolean specified; |
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438 | { |
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439 | filerec *directories; |
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440 | |
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441 | *last = (filerec *) NULL; |
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442 | directories = parent->dirs; |
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443 | while (directories) { |
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444 | if (! strcmp(directories->name, name)) |
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445 | break; |
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446 | (*last) = directories; |
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447 | directories = directories->next; |
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448 | } |
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449 | if (directories) { |
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450 | directories->specified = (directories->specified || specified); |
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451 | *last = directories; |
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452 | return 0; |
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453 | } |
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454 | if (*last) { |
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455 | (*last)->next = (filerec *) malloc(sizeof(filerec)); |
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456 | if (! (*last)->next) { |
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457 | set_error(errno); |
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458 | error("malloc"); |
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459 | return error_code; |
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460 | } |
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461 | *(*last)->next = default_directory; |
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462 | (*last)->next->previous = *last; |
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463 | (*last)->next->parent = parent; |
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464 | (*last) = (*last)->next; |
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465 | } |
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466 | else { |
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467 | parent->dirs = (filerec *) malloc(sizeof(filerec)); |
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468 | if (! parent->dirs) { |
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469 | set_error(errno); |
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470 | error("malloc"); |
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471 | return error_code; |
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472 | } |
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473 | *parent->dirs = default_directory; |
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474 | parent->dirs->parent = parent; |
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475 | parent->dirs->previous = (filerec *) NULL; |
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476 | (*last) = parent->dirs; |
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477 | } |
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478 | (void) strcpy((*last)->name, name); |
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479 | (*last)->specified = specified; |
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480 | return 0; |
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481 | } |
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482 | |
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483 | |
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484 | |
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485 | |
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486 | |
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487 | int free_leaf(leaf) |
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488 | filerec *leaf; |
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489 | { |
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490 | int retval; |
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491 | |
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492 | leaf->freed = True; |
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493 | if (! (leaf->dirs || leaf->files)) { |
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494 | if (leaf->previous) |
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495 | leaf->previous->next = leaf->next; |
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496 | if (leaf->next) |
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497 | leaf->next->previous = leaf->previous; |
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498 | if (leaf->parent) { |
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499 | if ((leaf->specs.st_mode & S_IFMT) == S_IFDIR) { |
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500 | if (leaf->parent->dirs == leaf) { |
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501 | leaf->parent->dirs = leaf->next; |
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502 | if (leaf->parent->freed) |
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503 | if (retval = free_leaf(leaf->parent)) |
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504 | return retval; |
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505 | } |
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506 | } |
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507 | else { |
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508 | if (leaf->parent->files == leaf) { |
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509 | leaf->parent->files = leaf->next; |
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510 | if (leaf->parent->freed) |
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511 | if (retval = free_leaf(leaf->parent)) |
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512 | return retval; |
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513 | } |
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514 | } |
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515 | free((char *) leaf); |
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516 | } |
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517 | } |
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518 | return 0; |
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519 | } |
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520 | |
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521 | |
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522 | |
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523 | int find_child(directory, name, child) |
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524 | filerec *directory, **child; |
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525 | char *name; |
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526 | { |
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527 | filerec *ptr; |
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528 | |
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529 | *child = (filerec *) NULL; |
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530 | if ((directory->specs.st_mode & S_IFMT) != S_IFDIR) |
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531 | return DIR_NOT_DIRECTORY; |
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532 | ptr = directory->dirs; |
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533 | while (ptr) |
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534 | if (strcmp(ptr->name, name)) |
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535 | ptr = ptr->next; |
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536 | else |
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537 | break; |
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538 | if (ptr) { |
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539 | *child = ptr; |
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540 | return DIR_MATCH; |
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541 | } |
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542 | ptr = directory->files; |
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543 | while (ptr) |
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544 | if (strcmp(ptr->name, name)) |
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545 | ptr = ptr->next; |
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546 | else |
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547 | break; |
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548 | if (ptr) { |
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549 | *child = ptr; |
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550 | return DIR_MATCH; |
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551 | } |
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552 | set_status(DIR_NO_MATCH); |
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553 | return DIR_NO_MATCH; |
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554 | } |
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555 | |
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556 | |
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557 | |
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558 | |
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559 | |
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560 | int change_path(old_path, new_path) |
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561 | char *old_path, *new_path; |
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562 | { |
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563 | char next_old[MAXNAMLEN], next_new[MAXNAMLEN]; |
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564 | char rest_old[MAXPATHLEN], rest_new[MAXPATHLEN]; |
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565 | int retval; |
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566 | filerec *current; |
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567 | |
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568 | if (*old_path == '/') { |
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569 | current = &root_tree; |
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570 | old_path++; |
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571 | new_path++; |
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572 | } |
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573 | else if (! strncmp(old_path, "./", 2)) { |
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574 | current = &cwd_tree; |
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575 | old_path += 2; |
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576 | new_path += 2; |
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577 | } |
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578 | else |
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579 | current = &cwd_tree; |
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580 | |
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581 | (void) strcpy(next_old, firstpart(old_path, rest_old)); |
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582 | (void) strcpy(next_new, firstpart(new_path, rest_new)); |
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583 | while (*next_old && *next_new) { |
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584 | retval = find_child(current, next_old, ¤t); |
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585 | if (retval == DIR_MATCH) { |
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586 | if (current) { |
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587 | (void) strcpy(current->name, next_new); |
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588 | current->specified = False; |
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589 | } |
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590 | else { |
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591 | set_error(INTERNAL_ERROR); |
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592 | error("change_path"); |
---|
593 | return error_code; |
---|
594 | } |
---|
595 | } |
---|
596 | else { |
---|
597 | error("change_path"); |
---|
598 | return retval; |
---|
599 | } |
---|
600 | |
---|
601 | (void) strcpy(next_old, firstpart(rest_old, rest_old)); |
---|
602 | (void) strcpy(next_new, firstpart(rest_new, rest_new)); |
---|
603 | } |
---|
604 | return 0; |
---|
605 | } |
---|
606 | |
---|
607 | |
---|
608 | int get_leaf_path(leaf, leaf_buf) |
---|
609 | filerec *leaf; |
---|
610 | char leaf_buf[]; /* RETURN */ |
---|
611 | { |
---|
612 | char *name_ptr; |
---|
613 | |
---|
614 | name_ptr = malloc(1); |
---|
615 | if (! name_ptr) { |
---|
616 | set_error(errno); |
---|
617 | error("malloc"); |
---|
618 | *leaf_buf = '\0'; |
---|
619 | return error_code; |
---|
620 | } |
---|
621 | *name_ptr = '\0'; |
---|
622 | do { |
---|
623 | name_ptr = realloc((char *) name_ptr, (unsigned) |
---|
624 | (strlen(leaf->name) + strlen(name_ptr) + 2)); |
---|
625 | if (! name_ptr) { |
---|
626 | set_error(errno); |
---|
627 | *leaf_buf = '\0'; |
---|
628 | error("realloc"); |
---|
629 | return error_code; |
---|
630 | } |
---|
631 | (void) strcpy(leaf_buf, name_ptr); |
---|
632 | *name_ptr = '\0'; |
---|
633 | if (leaf->parent) if (leaf->parent->parent) |
---|
634 | (void) strcat(name_ptr, "/"); |
---|
635 | (void) strcat(name_ptr, leaf->name); |
---|
636 | (void) strcat(name_ptr, leaf_buf); |
---|
637 | leaf = leaf->parent; |
---|
638 | } while (leaf); |
---|
639 | (void) strcpy(leaf_buf, name_ptr); |
---|
640 | return 0; |
---|
641 | } |
---|
642 | |
---|
643 | |
---|
644 | |
---|
645 | |
---|
646 | |
---|
647 | int accumulate_names(leaf, in_strings, num) |
---|
648 | filerec *leaf; |
---|
649 | char ***in_strings; |
---|
650 | int *num; |
---|
651 | { |
---|
652 | char newname[MAXPATHLEN]; |
---|
653 | char **strings; |
---|
654 | int retval; |
---|
655 | |
---|
656 | strings = *in_strings; |
---|
657 | if (leaf->specified) { |
---|
658 | *num += 1; |
---|
659 | strings = (char **) realloc((char *) strings, (unsigned) |
---|
660 | (sizeof(char *) * (*num))); |
---|
661 | if (! strings) { |
---|
662 | set_error(errno); |
---|
663 | error("realloc"); |
---|
664 | return error_code; |
---|
665 | } |
---|
666 | if (retval = get_leaf_path(leaf, newname)) { |
---|
667 | error("get_leaf_path"); |
---|
668 | return retval; |
---|
669 | } |
---|
670 | convert_to_user_name(newname, newname); |
---|
671 | strings[*num - 1] = malloc((unsigned) (strlen(newname) + 1)); |
---|
672 | if (! strings[*num - 1]) { |
---|
673 | set_error(errno); |
---|
674 | error("malloc"); |
---|
675 | return error_code; |
---|
676 | } |
---|
677 | (void) strcpy(strings[*num - 1], newname); |
---|
678 | } |
---|
679 | if (leaf->files) if (retval = accumulate_names(leaf->files, &strings, |
---|
680 | num)) { |
---|
681 | error("accumulate_names"); |
---|
682 | return retval; |
---|
683 | } |
---|
684 | if (leaf->dirs) if (retval = accumulate_names(leaf->dirs, &strings, |
---|
685 | num)) { |
---|
686 | error("accumulate_names"); |
---|
687 | return retval; |
---|
688 | } |
---|
689 | if (leaf->next) if (retval = accumulate_names(leaf->next, &strings, |
---|
690 | num)) { |
---|
691 | error("accumulate_names"); |
---|
692 | return retval; |
---|
693 | } |
---|
694 | |
---|
695 | *in_strings = strings; |
---|
696 | return 0; |
---|
697 | } |
---|