Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 1 | /* |
| 2 | * get_pathname.c --- do directry/inode -> name translation |
| 3 | * |
Theodore Ts'o | 19c78dc | 1997-04-29 16:17:09 +0000 | [diff] [blame] | 4 | * Copyright (C) 1993, 1994, 1995 Theodore Ts'o. |
| 5 | * |
| 6 | * %Begin-Header% |
| 7 | * This file may be redistributed under the terms of the GNU Public |
| 8 | * License. |
| 9 | * %End-Header% |
| 10 | * |
| 11 | * ext2fs_get_pathname(fs, dir, ino, name) |
| 12 | * |
| 13 | * This function translates takes two inode numbers into a |
| 14 | * string, placing the result in <name>. <dir> is the containing |
| 15 | * directory inode, and <ino> is the inode number itself. If |
| 16 | * <ino> is zero, then ext2fs_get_pathname will return pathname |
| 17 | * of the the directory <dir>. |
| 18 | * |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 19 | */ |
| 20 | |
| 21 | #include <stdio.h> |
| 22 | #include <string.h> |
Theodore Ts'o | 4cbe8af | 1997-08-10 23:07:40 +0000 | [diff] [blame] | 23 | #if HAVE_UNISTD_H |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 24 | #include <unistd.h> |
Theodore Ts'o | 4cbe8af | 1997-08-10 23:07:40 +0000 | [diff] [blame] | 25 | #endif |
Theodore Ts'o | f3db356 | 1997-04-26 13:34:30 +0000 | [diff] [blame] | 26 | |
Theodore Ts'o | b5abe6f | 1998-01-19 14:47:53 +0000 | [diff] [blame] | 27 | #if EXT2_FLAT_INCLUDES |
| 28 | #include "ext2_fs.h" |
| 29 | #else |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 30 | #include <linux/ext2_fs.h> |
Theodore Ts'o | b5abe6f | 1998-01-19 14:47:53 +0000 | [diff] [blame] | 31 | #endif |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 32 | |
| 33 | #include "ext2fs.h" |
| 34 | |
| 35 | struct get_pathname_struct { |
Theodore Ts'o | 4cbe8af | 1997-08-10 23:07:40 +0000 | [diff] [blame] | 36 | ino_t search_ino; |
| 37 | ino_t parent; |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 38 | char *name; |
| 39 | errcode_t errcode; |
| 40 | }; |
| 41 | |
Theodore Ts'o | 4cbe8af | 1997-08-10 23:07:40 +0000 | [diff] [blame] | 42 | #ifdef __TURBOC__ |
| 43 | #pragma argsused |
| 44 | #endif |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 45 | static int get_pathname_proc(struct ext2_dir_entry *dirent, |
| 46 | int offset, |
| 47 | int blocksize, |
| 48 | char *buf, |
Theodore Ts'o | b5abe6f | 1998-01-19 14:47:53 +0000 | [diff] [blame] | 49 | void *priv_data) |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 50 | { |
| 51 | struct get_pathname_struct *gp; |
Theodore Ts'o | 7b4e453 | 1997-10-26 03:41:24 +0000 | [diff] [blame] | 52 | errcode_t retval; |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 53 | |
Theodore Ts'o | b5abe6f | 1998-01-19 14:47:53 +0000 | [diff] [blame] | 54 | gp = (struct get_pathname_struct *) priv_data; |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 55 | |
Theodore Ts'o | 674a4ee | 1998-03-23 02:06:52 +0000 | [diff] [blame] | 56 | if (((dirent->name_len & 0xFF) == 2) && |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 57 | !strncmp(dirent->name, "..", 2)) |
| 58 | gp->parent = dirent->inode; |
| 59 | if (dirent->inode == gp->search_ino) { |
Theodore Ts'o | 674a4ee | 1998-03-23 02:06:52 +0000 | [diff] [blame] | 60 | retval = ext2fs_get_mem((dirent->name_len & 0xFF) + 1, |
Theodore Ts'o | 7b4e453 | 1997-10-26 03:41:24 +0000 | [diff] [blame] | 61 | (void **) &gp->name); |
Theodore Ts'o | 2eb374c | 1998-09-03 01:22:57 +0000 | [diff] [blame^] | 62 | if (retval) { |
| 63 | gp->errcode = retval; |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 64 | return DIRENT_ABORT; |
| 65 | } |
Theodore Ts'o | 674a4ee | 1998-03-23 02:06:52 +0000 | [diff] [blame] | 66 | strncpy(gp->name, dirent->name, (dirent->name_len & 0xFF)); |
| 67 | gp->name[dirent->name_len & 0xFF] = '\0'; |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 68 | return DIRENT_ABORT; |
| 69 | } |
| 70 | return 0; |
| 71 | } |
| 72 | |
| 73 | static errcode_t ext2fs_get_pathname_int(ext2_filsys fs, ino_t dir, ino_t ino, |
| 74 | int maxdepth, char *buf, char **name) |
| 75 | { |
| 76 | struct get_pathname_struct gp; |
| 77 | char *parent_name, *ret; |
| 78 | errcode_t retval; |
| 79 | |
| 80 | if (dir == ino) { |
Theodore Ts'o | 7b4e453 | 1997-10-26 03:41:24 +0000 | [diff] [blame] | 81 | retval = ext2fs_get_mem(2, (void **)name); |
| 82 | if (retval) |
| 83 | return retval; |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 84 | strcpy(*name, (dir == EXT2_ROOT_INO) ? "/" : "."); |
| 85 | return 0; |
| 86 | } |
| 87 | |
| 88 | if (!dir || (maxdepth < 0)) { |
Theodore Ts'o | 7b4e453 | 1997-10-26 03:41:24 +0000 | [diff] [blame] | 89 | retval = ext2fs_get_mem(4, (void **)name); |
| 90 | if (retval) |
| 91 | return retval; |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 92 | strcpy(*name, "..."); |
| 93 | return 0; |
| 94 | } |
| 95 | |
| 96 | gp.search_ino = ino; |
| 97 | gp.parent = 0; |
| 98 | gp.name = 0; |
| 99 | gp.errcode = 0; |
| 100 | |
| 101 | retval = ext2fs_dir_iterate(fs, dir, 0, buf, get_pathname_proc, &gp); |
| 102 | if (retval) |
| 103 | goto cleanup; |
| 104 | if (gp.errcode) { |
| 105 | retval = gp.errcode; |
| 106 | goto cleanup; |
| 107 | } |
| 108 | |
| 109 | retval = ext2fs_get_pathname_int(fs, gp.parent, dir, maxdepth-1, |
| 110 | buf, &parent_name); |
| 111 | if (retval) |
| 112 | goto cleanup; |
| 113 | if (!ino) { |
| 114 | *name = parent_name; |
| 115 | return 0; |
| 116 | } |
| 117 | |
Theodore Ts'o | f3db356 | 1997-04-26 13:34:30 +0000 | [diff] [blame] | 118 | if (gp.name) |
Theodore Ts'o | 7b4e453 | 1997-10-26 03:41:24 +0000 | [diff] [blame] | 119 | retval = ext2fs_get_mem(strlen(parent_name)+strlen(gp.name)+2, |
| 120 | (void **) &ret); |
Theodore Ts'o | f3db356 | 1997-04-26 13:34:30 +0000 | [diff] [blame] | 121 | else |
Theodore Ts'o | 7b4e453 | 1997-10-26 03:41:24 +0000 | [diff] [blame] | 122 | retval = ext2fs_get_mem(strlen(parent_name)+5, |
| 123 | (void **) &ret); |
| 124 | if (retval) |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 125 | goto cleanup; |
Theodore Ts'o | 7b4e453 | 1997-10-26 03:41:24 +0000 | [diff] [blame] | 126 | |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 127 | ret[0] = 0; |
| 128 | if (parent_name[1]) |
| 129 | strcat(ret, parent_name); |
| 130 | strcat(ret, "/"); |
| 131 | if (gp.name) |
| 132 | strcat(ret, gp.name); |
| 133 | else |
| 134 | strcat(ret, "???"); |
| 135 | *name = ret; |
Theodore Ts'o | 7b4e453 | 1997-10-26 03:41:24 +0000 | [diff] [blame] | 136 | ext2fs_free_mem((void **) &parent_name); |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 137 | retval = 0; |
| 138 | |
| 139 | cleanup: |
| 140 | if (gp.name) |
Theodore Ts'o | 7b4e453 | 1997-10-26 03:41:24 +0000 | [diff] [blame] | 141 | ext2fs_free_mem((void **) &gp.name); |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 142 | return retval; |
| 143 | } |
| 144 | |
| 145 | errcode_t ext2fs_get_pathname(ext2_filsys fs, ino_t dir, ino_t ino, |
| 146 | char **name) |
| 147 | { |
| 148 | char *buf; |
| 149 | errcode_t retval; |
| 150 | |
Theodore Ts'o | f3db356 | 1997-04-26 13:34:30 +0000 | [diff] [blame] | 151 | EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS); |
| 152 | |
Theodore Ts'o | 7b4e453 | 1997-10-26 03:41:24 +0000 | [diff] [blame] | 153 | retval = ext2fs_get_mem(fs->blocksize, (void **) &buf); |
| 154 | if (retval) |
| 155 | return retval; |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 156 | if (dir == ino) |
| 157 | ino = 0; |
| 158 | retval = ext2fs_get_pathname_int(fs, dir, ino, 32, buf, name); |
Theodore Ts'o | 7b4e453 | 1997-10-26 03:41:24 +0000 | [diff] [blame] | 159 | ext2fs_free_mem((void **) &buf); |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 160 | return retval; |
| 161 | |
| 162 | } |