Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 1 | /* |
| 2 | |
| 3 | /usr/src/ext2ed/dir_com.c |
| 4 | |
| 5 | A part of the extended file system 2 disk editor. |
| 6 | |
| 7 | -------------------- |
| 8 | Handles directories. |
| 9 | -------------------- |
| 10 | |
| 11 | This file contains the codes which allows the user to handle directories. |
| 12 | |
| 13 | Most of the functions use the global variable file_info (along with the special directory fields there) to save |
| 14 | information and pass it between them. |
| 15 | |
| 16 | Since a directory is just a big file which is composed of directory entries, you will find that |
| 17 | the functions here are a superset of those in the file_com.c source. |
| 18 | |
| 19 | We assume that the user reached here using the dir command of the inode type and not by using settype dir, so |
| 20 | that init_dir_info is indeed called to gather the required information. |
| 21 | |
Theodore Ts'o | 598ff01 | 2005-12-09 19:16:40 -0500 | [diff] [blame] | 22 | type_data is not changed! It still contains the inode of the file - We handle the directory in our own |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 23 | variables, so that settype ext2_inode will "go back" to the inode of this directory. |
| 24 | |
| 25 | First written on: April 28 1995 |
| 26 | |
| 27 | Copyright (C) 1995 Gadi Oxman |
| 28 | |
| 29 | */ |
| 30 | |
| 31 | #include <stdio.h> |
| 32 | #include <stdlib.h> |
| 33 | #include <string.h> |
| 34 | |
| 35 | #include "ext2ed.h" |
| 36 | |
| 37 | char name_search [80]; |
| 38 | long entry_num_search; |
| 39 | |
| 40 | int init_dir_info (struct struct_file_info *info_ptr) |
| 41 | |
| 42 | /* |
| 43 | |
| 44 | This function is called by the inode of the directory when the user issues the dir command from the inode. |
| 45 | It is used to gather information about the inode and to reset some variables which we need in order to handle |
| 46 | directories. |
| 47 | |
| 48 | */ |
| 49 | |
| 50 | { |
| 51 | struct ext2_inode *ptr; |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 52 | |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 53 | ptr=&type_data.u.t_ext2_inode; /* type_data contains the inode */ |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 54 | |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 55 | info_ptr->inode_ptr=ptr; |
| 56 | info_ptr->inode_offset=device_offset; /* device offset contains the inode's offset */ |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 57 | |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 58 | /* Reset the current position to the start */ |
| 59 | |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 60 | info_ptr->global_block_num=ptr->i_block [0]; |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 61 | info_ptr->global_block_offset=ptr->i_block [0]*file_system_info.block_size; |
| 62 | info_ptr->block_num=0; |
| 63 | info_ptr->file_offset=0; |
| 64 | /* Set the size of the directory */ |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 65 | |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 66 | info_ptr->blocks_count=(ptr->i_size+file_system_info.block_size-1)/file_system_info.block_size; |
| 67 | info_ptr->file_length=ptr->i_size; |
| 68 | |
| 69 | info_ptr->level=0; /* We start using direct blocks */ |
| 70 | info_ptr->display=HEX; /* This is not actually used */ |
| 71 | |
| 72 | info_ptr->dir_entry_num=0;info_ptr->dir_entries_count=0; /* We'll start at the first directory entry */ |
| 73 | info_ptr->dir_entry_offset=0; |
| 74 | |
| 75 | /* Find dir_entries_count */ |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 76 | |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 77 | info_ptr->dir_entries_count=count_dir_entries (); /* Set the total number of entries */ |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 78 | |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 79 | return (1); |
| 80 | } |
| 81 | |
| 82 | struct struct_file_info search_dir_entries (int (*action) (struct struct_file_info *info),int *status) |
| 83 | |
| 84 | /* |
| 85 | This is the main function in this source file. Various actions are implemented using this basic function. |
| 86 | |
| 87 | This routine runs on all directory entries in the current directory. |
| 88 | For each entry, action is called. We'll act according to the return code of action: |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 89 | |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 90 | ABORT - Current dir entry is returned. |
| 91 | CONTINUE - Continue searching. |
| 92 | FOUND - Current dir entry is returned. |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 93 | |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 94 | If the last entry is reached, it is returned, along with an ABORT status. |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 95 | |
| 96 | status is updated to the returned code of action. |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 97 | */ |
| 98 | |
| 99 | { |
| 100 | struct struct_file_info info; /* Temporary variables used to */ |
Theodore Ts'o | 0f31c73 | 2002-05-11 13:03:25 -0400 | [diff] [blame] | 101 | struct ext2_dir_entry_2 *dir_entry_ptr; /* contain the current search entries */ |
Theodore Ts'o | 93599d0 | 2002-09-30 00:12:10 -0400 | [diff] [blame] | 102 | int return_code, next; |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 103 | |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 104 | info=first_file_info; /* Start from the first entry - Read it */ |
| 105 | low_read (info.buffer,file_system_info.block_size,info.global_block_offset); |
Theodore Ts'o | 0f31c73 | 2002-05-11 13:03:25 -0400 | [diff] [blame] | 106 | dir_entry_ptr=(struct ext2_dir_entry_2 *) (info.buffer+info.dir_entry_offset); |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 107 | |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 108 | while (info.file_offset < info.file_length) { /* While we haven't reached the end */ |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 109 | |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 110 | *status=return_code=action (&info); /* Call the client function to test */ |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 111 | /* the current entry */ |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 112 | if (return_code==ABORT || return_code==FOUND) |
| 113 | return (info); /* Stop, if so asked */ |
| 114 | |
| 115 | /* Pass to the next entry */ |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 116 | |
Theodore Ts'o | 0f31c73 | 2002-05-11 13:03:25 -0400 | [diff] [blame] | 117 | dir_entry_ptr=(struct ext2_dir_entry_2 *) (info.buffer+info.dir_entry_offset); |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 118 | |
| 119 | info.dir_entry_num++; |
Theodore Ts'o | 93599d0 | 2002-09-30 00:12:10 -0400 | [diff] [blame] | 120 | next = dir_entry_ptr->rec_len; |
| 121 | if (!next) |
| 122 | next = file_system_info.block_size - info.dir_entry_offset; |
| 123 | info.dir_entry_offset += next; |
| 124 | info.file_offset += next; |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 125 | |
| 126 | if (info.file_offset >= info.file_length) break; |
| 127 | |
| 128 | if (info.dir_entry_offset >= file_system_info.block_size) { /* We crossed a block boundary */ |
| 129 | /* Find the next block, */ |
| 130 | info.block_num++; |
| 131 | info.global_block_num=file_block_to_global_block (info.block_num,&info); |
| 132 | info.global_block_offset=info.global_block_num*file_system_info.block_size; |
| 133 | info.file_offset=info.block_num*file_system_info.block_size; |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 134 | info.dir_entry_offset=0; |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 135 | /* read it and update the pointer */ |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 136 | |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 137 | low_read (info.buffer,file_system_info.block_size,info.global_block_offset); |
Theodore Ts'o | 0f31c73 | 2002-05-11 13:03:25 -0400 | [diff] [blame] | 138 | dir_entry_ptr=(struct ext2_dir_entry_2 *) (info.buffer+info.dir_entry_offset); |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 139 | |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 140 | } |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 141 | |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 142 | } |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 143 | |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 144 | *status=ABORT;return (info); /* There was no match */ |
| 145 | } |
| 146 | |
| 147 | long count_dir_entries (void) |
| 148 | |
| 149 | /* |
| 150 | |
| 151 | This function counts the number of entries in the directory. We just call search_dir_entries till the end. |
| 152 | The client function is action_count, which just tell search_dir_entries to continue. |
| 153 | |
| 154 | */ |
| 155 | |
| 156 | { |
| 157 | int status; |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 158 | |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 159 | return (search_dir_entries (&action_count,&status).dir_entry_num); |
| 160 | } |
| 161 | |
| 162 | int action_count (struct struct_file_info *info) |
| 163 | |
| 164 | /* |
| 165 | |
| 166 | Used by count_dir_entries above - This function is called by search_dir_entries, and it tells it to continue |
| 167 | searching, until we get to the last entry. |
| 168 | |
| 169 | */ |
| 170 | |
| 171 | { |
| 172 | return (CONTINUE); /* Just continue searching */ |
| 173 | } |
| 174 | |
| 175 | void type_dir___cd (char *command_line) |
| 176 | |
| 177 | /* |
| 178 | Changes to a directory, relative to the current directory. |
| 179 | |
| 180 | This is a complicated operation, so I would repeat here the explanation from the design and |
| 181 | implementation document. |
| 182 | |
| 183 | 1. The path is checked that it is not an absolute path (from /). If it is, we let the general cd to do the job by |
| 184 | calling directly type_ext2___cd. |
| 185 | |
| 186 | 2. The path is divided into the nearest path and the rest of the path. For example, cd 1/2/3/4 is divided into |
| 187 | 1 and into 2/3/4. |
| 188 | |
| 189 | 3. It is the first part of the path that we need to search for in the current directory. We search for it using |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 190 | search_dir_entries, which accepts the action_name function as the client function. |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 191 | |
| 192 | 4. search_dir_entries will scan the entire entries and will call our action_name function for each entry. |
| 193 | In action_name, the required name will be checked against the name of the current entry, and FOUND will be |
| 194 | returned when a match occurs. |
| 195 | |
| 196 | 5. If the required entry is found, we dispatch a remember command to insert the current inode (remember that |
| 197 | type_data is still intact and contains the inode of the current directory) into the object memory. |
| 198 | This is required to easily support symbolic links - If we find later that the inode pointed by the entry is |
| 199 | actually a symbolic link, we'll need to return to this point, and the above inode doesn't have (and can't have, |
| 200 | because of hard links) the information necessary to "move back". |
| 201 | |
| 202 | 6. We then dispatch a followinode command to reach the inode pointed by the required entry. This command will |
| 203 | automatically change the type to ext2_inode - We are now at an inode, and all the inode commands are available. |
| 204 | |
| 205 | 7. We check the inode's type to see if it is a directory. If it is, we dispatch a dir command to "enter the directory", |
| 206 | and recursively call ourself (The type is dir again) by dispatching a cd command, with the rest of the path |
| 207 | as an argument. |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 208 | |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 209 | 8. If the inode's type is a symbolic link (only fast symbolic link were meanwhile implemented. I guess this is |
| 210 | typically the case.), we note the path it is pointing at, the saved inode is recalled, we dispatch dir to |
| 211 | get back to the original directory, and we call ourself again with the link path/rest of the path argument. |
| 212 | |
| 213 | 9. In any other case, we just stop at the resulting inode. |
| 214 | |
| 215 | */ |
| 216 | |
| 217 | { |
| 218 | int status; |
| 219 | char *ptr,full_dir_name [500],dir_name [500],temp [500],temp2 [500]; |
| 220 | struct struct_file_info info; |
Theodore Ts'o | 0f31c73 | 2002-05-11 13:03:25 -0400 | [diff] [blame] | 221 | struct ext2_dir_entry_2 *dir_entry_ptr; |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 222 | |
Theodore Ts'o | 0f31c73 | 2002-05-11 13:03:25 -0400 | [diff] [blame] | 223 | dir_entry_ptr=(struct ext2_dir_entry_2 *) (file_info.buffer+file_info.dir_entry_offset); |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 224 | |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 225 | ptr=parse_word (command_line,dir_name); |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 226 | |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 227 | if (*ptr==0) { /* cd alone will enter the highlighted directory */ |
| 228 | strncpy (full_dir_name,dir_entry_ptr->name,dir_entry_ptr->name_len); |
| 229 | full_dir_name [dir_entry_ptr->name_len]=0; |
| 230 | } |
| 231 | else |
| 232 | ptr=parse_word (ptr,full_dir_name); |
| 233 | |
| 234 | ptr=strchr (full_dir_name,'/'); |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 235 | |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 236 | if (ptr==full_dir_name) { /* Pathname is from root - Let the general cd do the job */ |
| 237 | sprintf (temp,"cd %s",full_dir_name);type_ext2___cd (temp);return; |
| 238 | } |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 239 | |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 240 | if (ptr==NULL) { |
| 241 | strcpy (dir_name,full_dir_name); |
| 242 | full_dir_name [0]=0; |
| 243 | } |
| 244 | |
| 245 | else { |
| 246 | strncpy (dir_name,full_dir_name,ptr-full_dir_name); |
| 247 | dir_name [ptr-full_dir_name]=0; |
| 248 | strcpy (full_dir_name,++ptr); |
| 249 | } |
| 250 | /* dir_name contains the current entry, while */ |
| 251 | /* full_dir_name contains the rest */ |
| 252 | |
| 253 | strcpy (name_search,dir_name); /* name_search is used to hold the required entry name */ |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 254 | |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 255 | if (dir_entry_ptr->name_len != strlen (dir_name) || |
| 256 | strncmp (dir_name,dir_entry_ptr->name,dir_entry_ptr->name_len)!=0) |
| 257 | info=search_dir_entries (&action_name,&status); /* Search for the entry. Answer in info. */ |
| 258 | else { |
| 259 | status=FOUND;info=file_info; |
| 260 | } |
| 261 | |
| 262 | if (status==FOUND) { /* If found */ |
| 263 | file_info=info; /* Switch to it, by setting the global file_info */ |
| 264 | dispatch ("remember internal_variable"); /* Move the inode into the objects memory */ |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 265 | |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 266 | dispatch ("followinode"); /* Go to the inode pointed by this directory entry */ |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 267 | |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 268 | if (S_ISLNK (type_data.u.t_ext2_inode.i_mode)) {/* Symbolic link ? */ |
| 269 | |
| 270 | if (type_data.u.t_ext2_inode.i_size > 60) { /* I'm lazy, I guess :-) */ |
| 271 | wprintw (command_win,"Error - Sorry, Only fast symbolic link following is currently supported\n"); |
| 272 | refresh_command_win (); |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 273 | return; |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 274 | } |
| 275 | /* Get the pointed name and append the previous path */ |
| 276 | |
| 277 | strcpy (temp2,(unsigned char *) &type_data.u.t_ext2_inode.i_block); |
| 278 | strcat (temp2,"/"); |
| 279 | strcat (temp2,full_dir_name); |
| 280 | |
| 281 | dispatch ("recall internal_variable"); /* Return to the original inode */ |
| 282 | dispatch ("dir"); /* and to the directory */ |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 283 | |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 284 | sprintf (temp,"cd %s",temp2); /* And continue from there by dispatching a cd command */ |
| 285 | dispatch (temp); /* (which can call ourself or the general cd) */ |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 286 | |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 287 | return; |
| 288 | } |
| 289 | |
| 290 | if (S_ISDIR (type_data.u.t_ext2_inode.i_mode)) { /* Is it an inode of a directory ? */ |
| 291 | |
| 292 | dispatch ("dir"); /* Yes - Pass to the pointed directory */ |
| 293 | |
| 294 | if (full_dir_name [0] != 0) { /* And call ourself with the rest of the pathname */ |
| 295 | sprintf (temp,"cd %s",full_dir_name); |
| 296 | dispatch (temp); |
| 297 | } |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 298 | |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 299 | return; |
| 300 | } |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 301 | |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 302 | else { /* If we can't continue from here, we'll just stop */ |
| 303 | wprintw (command_win,"Can\'t continue - Stopping at last inode\n");refresh_command_win (); |
| 304 | return; |
| 305 | } |
| 306 | } |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 307 | |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 308 | wprintw (command_win,"Error - Directory entry %s not found.\n",dir_name); /* Hmm, an invalid path somewhere */ |
| 309 | refresh_command_win (); |
| 310 | } |
| 311 | |
| 312 | int action_name (struct struct_file_info *info) |
| 313 | |
| 314 | /* |
| 315 | |
| 316 | Compares the current search entry name (somewhere inside info) with the required name (in name_search). |
| 317 | Returns FOUND if found, or CONTINUE if not found. |
| 318 | |
| 319 | */ |
| 320 | |
| 321 | { |
Theodore Ts'o | 0f31c73 | 2002-05-11 13:03:25 -0400 | [diff] [blame] | 322 | struct ext2_dir_entry_2 *dir_entry_ptr; |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 323 | |
Theodore Ts'o | 0f31c73 | 2002-05-11 13:03:25 -0400 | [diff] [blame] | 324 | dir_entry_ptr=(struct ext2_dir_entry_2 *) (info->buffer+info->dir_entry_offset); |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 325 | |
| 326 | if (dir_entry_ptr->name_len != strlen (name_search)) |
| 327 | return (CONTINUE); |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 328 | |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 329 | if (strncmp (dir_entry_ptr->name,name_search,dir_entry_ptr->name_len)==0) |
| 330 | return (FOUND); |
| 331 | |
| 332 | return (CONTINUE); |
| 333 | } |
| 334 | |
| 335 | void type_dir___entry (char *command_line) |
| 336 | |
| 337 | /* |
| 338 | |
| 339 | Selects a directory entry according to its number. |
| 340 | search_dir_entries is used along with action_entry_num, in the same fashion as the previous usage of search_dir_entries. |
| 341 | |
| 342 | */ |
| 343 | |
| 344 | { |
| 345 | int status; |
| 346 | struct struct_file_info info; |
| 347 | char *ptr,buffer [80]; |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 348 | |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 349 | ptr=parse_word (command_line,buffer); |
| 350 | if (*ptr==0) { |
| 351 | wprintw (command_win,"Error - Argument_not_specified\n");wrefresh (command_win); |
| 352 | return; |
| 353 | } |
| 354 | ptr=parse_word (ptr,buffer); |
| 355 | entry_num_search=atol (buffer); |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 356 | |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 357 | if (entry_num_search < 0 || entry_num_search >= file_info.dir_entries_count) { |
| 358 | wprintw (command_win,"Error - Entry number out of range\n");wrefresh (command_win); |
| 359 | return; |
| 360 | } |
| 361 | |
| 362 | info=search_dir_entries (&action_entry_num,&status); |
| 363 | if (status==FOUND) { |
| 364 | file_info=info; |
| 365 | dispatch ("show"); |
| 366 | return; |
| 367 | } |
| 368 | #ifdef DEBUG |
| 369 | internal_error ("dir_com","type_dir___entry","According to our gathered data, we should have found this entry"); |
| 370 | #endif |
| 371 | } |
| 372 | |
| 373 | int action_entry_num (struct struct_file_info *info) |
| 374 | |
| 375 | /* |
| 376 | |
| 377 | Used by the above function. Just compares the current number (in info) with the required one. |
| 378 | |
| 379 | */ |
| 380 | |
| 381 | { |
| 382 | if (info->dir_entry_num == entry_num_search) |
| 383 | return (FOUND); |
| 384 | |
| 385 | return (CONTINUE); |
| 386 | } |
| 387 | |
| 388 | void type_dir___followinode (char *command_line) |
| 389 | |
| 390 | /* |
| 391 | |
| 392 | Here we pass to the inode pointed by the current entry. |
| 393 | It involves computing the device offset of the inode and using directly the setoffset and settype commands. |
| 394 | |
| 395 | */ |
| 396 | { |
| 397 | long inode_offset; |
| 398 | char buffer [80]; |
| 399 | |
Theodore Ts'o | 0f31c73 | 2002-05-11 13:03:25 -0400 | [diff] [blame] | 400 | struct ext2_dir_entry_2 *dir_entry_ptr; |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 401 | |
| 402 | low_read (file_info.buffer,file_system_info.block_size,file_info.global_block_offset); |
Theodore Ts'o | 0f31c73 | 2002-05-11 13:03:25 -0400 | [diff] [blame] | 403 | dir_entry_ptr=(struct ext2_dir_entry_2 *) (file_info.buffer+file_info.dir_entry_offset); |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 404 | |
| 405 | inode_offset=inode_num_to_inode_offset (dir_entry_ptr->inode); /* Compute the inode's offset */ |
| 406 | sprintf (buffer,"setoffset %ld",inode_offset);dispatch (buffer); /* Move to it */ |
| 407 | sprintf (buffer,"settype ext2_inode");dispatch (buffer); /* and set the type to an inode */ |
| 408 | } |
| 409 | |
| 410 | void type_dir___inode (char *command_line) |
| 411 | |
| 412 | /* |
| 413 | |
| 414 | Returns to the parent inode of the current directory. |
| 415 | This is trivial, as we type_data is still intact and contains the parent inode ! |
| 416 | |
| 417 | */ |
| 418 | |
| 419 | { |
| 420 | dispatch ("settype ext2_inode"); |
| 421 | } |
| 422 | |
| 423 | |
| 424 | void type_dir___show (char *command_line) |
| 425 | |
| 426 | /* |
| 427 | |
| 428 | We use search_dir_entries to run on all the entries. Each time, action_show will be called to show one entry. |
| 429 | |
| 430 | */ |
| 431 | |
| 432 | { |
| 433 | int status; |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 434 | |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 435 | wmove (show_pad,0,0); |
| 436 | show_pad_info.max_line=-1; |
| 437 | |
| 438 | search_dir_entries (&action_show,&status); |
| 439 | show_pad_info.line=file_info.dir_entry_num-show_pad_info.display_lines/2; |
| 440 | refresh_show_pad (); |
| 441 | show_dir_status (); |
| 442 | } |
| 443 | |
| 444 | int action_show (struct struct_file_info *info) |
| 445 | |
| 446 | /* |
| 447 | |
| 448 | Show the current search entry (info) in one line. If the entry happens to be the current edited entry, it is highlighted. |
| 449 | |
| 450 | */ |
| 451 | |
| 452 | { |
| 453 | unsigned char temp [80]; |
Theodore Ts'o | 0f31c73 | 2002-05-11 13:03:25 -0400 | [diff] [blame] | 454 | struct ext2_dir_entry_2 *dir_entry_ptr; |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 455 | |
Theodore Ts'o | 0f31c73 | 2002-05-11 13:03:25 -0400 | [diff] [blame] | 456 | dir_entry_ptr=(struct ext2_dir_entry_2 *) (info->buffer+info->dir_entry_offset); |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 457 | |
| 458 | if (info->dir_entry_num == file_info.dir_entry_num) /* Highlight the current entry */ |
| 459 | wattrset (show_pad,A_REVERSE); |
| 460 | |
| 461 | strncpy (temp,dir_entry_ptr->name,dir_entry_ptr->name_len); /* The name is not terminated */ |
| 462 | temp [dir_entry_ptr->name_len]=0; |
| 463 | if (dir_entry_ptr->name_len > (COLS - 55) && COLS > 55) |
| 464 | temp [COLS-55]=0; |
| 465 | wprintw (show_pad,"inode = %-8lu rec_len = %-4lu name_len = %-3lu name = %s\n", /* Display the various fields */ |
| 466 | dir_entry_ptr->inode,dir_entry_ptr->rec_len,dir_entry_ptr->name_len,temp); |
| 467 | |
| 468 | show_pad_info.max_line++; |
| 469 | |
| 470 | if (info->dir_entry_num == file_info.dir_entry_num) |
| 471 | wattrset (show_pad,A_NORMAL); |
| 472 | |
| 473 | return (CONTINUE); /* And pass to the next */ |
| 474 | } |
| 475 | |
| 476 | void type_dir___next (char *command_line) |
| 477 | |
| 478 | /* |
| 479 | |
| 480 | This function moves to the next directory entry. It just uses the current information and the entry command. |
| 481 | |
| 482 | */ |
| 483 | |
| 484 | { |
| 485 | int offset=1; |
| 486 | char *ptr,buffer [80]; |
| 487 | |
| 488 | ptr=parse_word (command_line,buffer); |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 489 | |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 490 | if (*ptr!=0) { |
| 491 | ptr=parse_word (ptr,buffer); |
| 492 | offset*=atol (buffer); |
| 493 | } |
| 494 | |
| 495 | sprintf (buffer,"entry %ld",file_info.dir_entry_num+offset);dispatch (buffer); |
| 496 | |
| 497 | } |
| 498 | |
| 499 | void type_dir___prev (char *command_line) |
| 500 | |
| 501 | { |
| 502 | int offset=1; |
| 503 | char *ptr,buffer [80]; |
| 504 | |
| 505 | ptr=parse_word (command_line,buffer); |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 506 | |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 507 | if (*ptr!=0) { |
| 508 | ptr=parse_word (ptr,buffer); |
| 509 | offset*=atol (buffer); |
| 510 | } |
| 511 | |
| 512 | sprintf (buffer,"entry %ld",file_info.dir_entry_num-offset);dispatch (buffer); |
| 513 | } |
| 514 | |
| 515 | void show_dir_status (void) |
| 516 | |
| 517 | /* |
| 518 | |
| 519 | Various statistics about the directory. |
| 520 | |
| 521 | */ |
| 522 | |
| 523 | { |
| 524 | long inode_num; |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 525 | |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 526 | wmove (show_win,0,0); |
| 527 | wprintw (show_win,"Directory listing. Block %ld. ",file_info.global_block_num); |
| 528 | wprintw (show_win,"Directory entry %ld of %ld.\n",file_info.dir_entry_num,file_info.dir_entries_count-1); |
| 529 | wprintw (show_win,"Directory Offset %ld of %ld. ",file_info.file_offset,file_info.file_length-1); |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 530 | |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 531 | inode_num=inode_offset_to_inode_num (file_info.inode_offset); |
| 532 | wprintw (show_win,"File inode %ld. Indirection level %ld.\n",inode_num,file_info.level); |
| 533 | |
| 534 | refresh_show_win (); |
| 535 | } |
| 536 | |
| 537 | void type_dir___remember (char *command_line) |
| 538 | |
| 539 | /* |
| 540 | |
| 541 | This is overrided here because we don't remember a directory - It is too complicated. Instead, we remember the |
| 542 | inode of the current directory. |
| 543 | |
| 544 | */ |
| 545 | |
| 546 | { |
| 547 | int found=0; |
| 548 | long entry_num; |
| 549 | char *ptr,buffer [80]; |
| 550 | struct struct_descriptor *descriptor_ptr; |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 551 | |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 552 | ptr=parse_word (command_line,buffer); |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 553 | |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 554 | if (*ptr==0) { |
| 555 | wprintw (command_win,"Error - Argument not specified\n");wrefresh (command_win); |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 556 | return; |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 557 | } |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 558 | |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 559 | ptr=parse_word (ptr,buffer); |
| 560 | |
| 561 | entry_num=remember_lifo.entries_count++; |
| 562 | if (entry_num>REMEMBER_COUNT-1) { |
| 563 | entry_num=0; |
| 564 | remember_lifo.entries_count--; |
| 565 | } |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 566 | |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 567 | descriptor_ptr=first_type; |
| 568 | while (descriptor_ptr!=NULL && !found) { |
| 569 | if (strcmp (descriptor_ptr->name,"ext2_inode")==0) |
| 570 | found=1; |
| 571 | else |
| 572 | descriptor_ptr=descriptor_ptr->next; |
| 573 | } |
| 574 | |
| 575 | |
| 576 | remember_lifo.offset [entry_num]=device_offset; |
| 577 | remember_lifo.type [entry_num]=descriptor_ptr; |
| 578 | strcpy (remember_lifo.name [entry_num],buffer); |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 579 | |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 580 | wprintw (command_win,"Object %s in Offset %ld remembered as %s\n",descriptor_ptr->name,device_offset,buffer); |
| 581 | wrefresh (command_win); |
| 582 | } |
| 583 | |
| 584 | void type_dir___set (char *command_line) |
| 585 | |
| 586 | /* |
| 587 | |
| 588 | Since the dir object doesn't have variables, we provide the impression that it has here. ext2_dir_entry was not used |
| 589 | because it is of variable length. |
| 590 | |
| 591 | */ |
| 592 | |
| 593 | { |
| 594 | int found=0; |
| 595 | unsigned char *ptr,buffer [80],variable [80],value [80],temp [80]; |
Theodore Ts'o | 0f31c73 | 2002-05-11 13:03:25 -0400 | [diff] [blame] | 596 | struct ext2_dir_entry_2 *dir_entry_ptr; |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 597 | |
Theodore Ts'o | 0f31c73 | 2002-05-11 13:03:25 -0400 | [diff] [blame] | 598 | dir_entry_ptr=(struct ext2_dir_entry_2 *) (file_info.buffer+file_info.dir_entry_offset); |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 599 | |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 600 | ptr=parse_word (command_line,buffer); |
| 601 | if (*ptr==0) { |
| 602 | wprintw (command_win,"Error - Missing arguments\n");refresh_command_win (); |
| 603 | return; |
| 604 | } |
| 605 | parse_word (ptr,buffer); |
| 606 | ptr=strchr (buffer,'='); |
| 607 | if (ptr==NULL) { |
| 608 | wprintw (command_win,"Error - Bad syntax\n");refresh_command_win ();return; |
| 609 | } |
| 610 | strncpy (variable,buffer,ptr-buffer);variable [ptr-buffer]=0; |
| 611 | strcpy (value,++ptr); |
| 612 | |
| 613 | if (strcasecmp ("inode",variable)==0) { |
| 614 | found=1; |
| 615 | dir_entry_ptr->inode=atol (value); |
| 616 | wprintw (command_win,"Variable %s set to %lu\n",variable,dir_entry_ptr->inode);refresh_command_win (); |
| 617 | |
| 618 | } |
| 619 | |
| 620 | if (strcasecmp ("rec_len",variable)==0) { |
| 621 | found=1; |
| 622 | dir_entry_ptr->rec_len=(unsigned int) atol (value); |
| 623 | wprintw (command_win,"Variable %s set to %lu\n",variable,dir_entry_ptr->rec_len);refresh_command_win (); |
| 624 | |
| 625 | } |
| 626 | |
| 627 | if (strcasecmp ("name_len",variable)==0) { |
| 628 | found=1; |
| 629 | dir_entry_ptr->name_len=(unsigned int) atol (value); |
| 630 | wprintw (command_win,"Variable %s set to %lu\n",variable,dir_entry_ptr->name_len);refresh_command_win (); |
| 631 | |
| 632 | } |
| 633 | |
| 634 | if (strcasecmp ("name",variable)==0) { |
| 635 | found=1; |
| 636 | if (strlen (value) > dir_entry_ptr->name_len) { |
| 637 | wprintw (command_win,"Error - Length of name greater then name_len\n"); |
| 638 | refresh_command_win ();return; |
| 639 | } |
| 640 | strncpy (dir_entry_ptr->name,value,strlen (value)); |
| 641 | wprintw (command_win,"Variable %s set to %s\n",variable,value);refresh_command_win (); |
| 642 | |
| 643 | } |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 644 | |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 645 | if (found) { |
| 646 | wattrset (show_pad,A_REVERSE); |
| 647 | strncpy (temp,dir_entry_ptr->name,dir_entry_ptr->name_len); |
| 648 | temp [dir_entry_ptr->name_len]=0; |
| 649 | wmove (show_pad,file_info.dir_entry_num,0); |
| 650 | wprintw (show_pad,"inode = %-8lu rec_len = %-4lu name_len = %-3lu name = %s\n", |
| 651 | dir_entry_ptr->inode,dir_entry_ptr->rec_len,dir_entry_ptr->name_len,temp); |
| 652 | wattrset (show_pad,A_NORMAL); |
| 653 | show_pad_info.line=file_info.dir_entry_num-show_pad_info.display_lines/2; |
| 654 | refresh_show_pad (); |
| 655 | show_dir_status (); |
| 656 | } |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 657 | |
Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 658 | else { |
| 659 | wprintw (command_win,"Error - Variable %s not found\n",variable); |
| 660 | refresh_command_win (); |
| 661 | } |
| 662 | |
| 663 | } |
| 664 | |
| 665 | void type_dir___writedata (char *command_line) |
| 666 | |
| 667 | /* |
| 668 | |
| 669 | We need to override this since the data is not in type_data. Instead, we have to write the buffer which corresponds |
| 670 | to the current block. |
| 671 | |
| 672 | */ |
| 673 | |
| 674 | { |
| 675 | low_write (file_info.buffer,file_system_info.block_size,file_info.global_block_offset); |
| 676 | return; |
| 677 | } |