get_pathname.c revision c4e3d3f374b409500e3dd05c0b0eca6ac98a6b4e
13839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o/* 23839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o * get_pathname.c --- do directry/inode -> name translation 33839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o * 419c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * Copyright (C) 1993, 1994, 1995 Theodore Ts'o. 519c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * 619c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * %Begin-Header% 719c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * This file may be redistributed under the terms of the GNU Public 819c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * License. 919c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * %End-Header% 1019c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * 1119c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * ext2fs_get_pathname(fs, dir, ino, name) 1219c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * 1319c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * This function translates takes two inode numbers into a 1419c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * string, placing the result in <name>. <dir> is the containing 1519c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * directory inode, and <ino> is the inode number itself. If 1619c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * <ino> is zero, then ext2fs_get_pathname will return pathname 1719c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * of the the directory <dir>. 1819c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * 193839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o */ 203839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o 213839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o#include <stdio.h> 223839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o#include <string.h> 234cbe8af4b0d0c72fb28bb500c1bd8a46b00fdde3Theodore Ts'o#if HAVE_UNISTD_H 243839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o#include <unistd.h> 254cbe8af4b0d0c72fb28bb500c1bd8a46b00fdde3Theodore Ts'o#endif 26f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o 27b5abe6fac9c9e7caf4710501d1657d30e4857ef6Theodore Ts'o#include "ext2_fs.h" 283839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o#include "ext2fs.h" 293839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o 303839e65723771b85975f4263102dd3ceec4523cTheodore Ts'ostruct get_pathname_struct { 3131dbecd482405e0d3a67eb58e1a1c8cb9f2ad83eTheodore Ts'o ext2_ino_t search_ino; 3231dbecd482405e0d3a67eb58e1a1c8cb9f2ad83eTheodore Ts'o ext2_ino_t parent; 333839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o char *name; 343839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o errcode_t errcode; 353839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o}; 363839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o 374cbe8af4b0d0c72fb28bb500c1bd8a46b00fdde3Theodore Ts'o#ifdef __TURBOC__ 3831dbecd482405e0d3a67eb58e1a1c8cb9f2ad83eTheodore Ts'o #pragma argsused 394cbe8af4b0d0c72fb28bb500c1bd8a46b00fdde3Theodore Ts'o#endif 403839e65723771b85975f4263102dd3ceec4523cTheodore Ts'ostatic int get_pathname_proc(struct ext2_dir_entry *dirent, 413839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o int offset, 423839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o int blocksize, 433839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o char *buf, 44b5abe6fac9c9e7caf4710501d1657d30e4857ef6Theodore Ts'o void *priv_data) 453839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o{ 463839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o struct get_pathname_struct *gp; 477b4e4534f9361b21d3fafdd88a58f133decee38cTheodore Ts'o errcode_t retval; 483839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o 49b5abe6fac9c9e7caf4710501d1657d30e4857ef6Theodore Ts'o gp = (struct get_pathname_struct *) priv_data; 503839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o 51674a4ee1e3e05133ddad701730bfc21c283272a4Theodore Ts'o if (((dirent->name_len & 0xFF) == 2) && 523839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o !strncmp(dirent->name, "..", 2)) 533839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o gp->parent = dirent->inode; 543839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o if (dirent->inode == gp->search_ino) { 55674a4ee1e3e05133ddad701730bfc21c283272a4Theodore Ts'o retval = ext2fs_get_mem((dirent->name_len & 0xFF) + 1, 56c4e3d3f374b409500e3dd05c0b0eca6ac98a6b4eTheodore Ts'o &gp->name); 572eb374c9401079aa56aa12f0047ca3866e69b754Theodore Ts'o if (retval) { 582eb374c9401079aa56aa12f0047ca3866e69b754Theodore Ts'o gp->errcode = retval; 593839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o return DIRENT_ABORT; 603839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o } 61674a4ee1e3e05133ddad701730bfc21c283272a4Theodore Ts'o strncpy(gp->name, dirent->name, (dirent->name_len & 0xFF)); 62674a4ee1e3e05133ddad701730bfc21c283272a4Theodore Ts'o gp->name[dirent->name_len & 0xFF] = '\0'; 633839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o return DIRENT_ABORT; 643839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o } 653839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o return 0; 663839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o} 673839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o 6831dbecd482405e0d3a67eb58e1a1c8cb9f2ad83eTheodore Ts'ostatic errcode_t ext2fs_get_pathname_int(ext2_filsys fs, ext2_ino_t dir, 6931dbecd482405e0d3a67eb58e1a1c8cb9f2ad83eTheodore Ts'o ext2_ino_t ino, int maxdepth, 7031dbecd482405e0d3a67eb58e1a1c8cb9f2ad83eTheodore Ts'o char *buf, char **name) 713839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o{ 723839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o struct get_pathname_struct gp; 733839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o char *parent_name, *ret; 743839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o errcode_t retval; 753839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o 763839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o if (dir == ino) { 77c4e3d3f374b409500e3dd05c0b0eca6ac98a6b4eTheodore Ts'o retval = ext2fs_get_mem(2, name); 787b4e4534f9361b21d3fafdd88a58f133decee38cTheodore Ts'o if (retval) 797b4e4534f9361b21d3fafdd88a58f133decee38cTheodore Ts'o return retval; 803839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o strcpy(*name, (dir == EXT2_ROOT_INO) ? "/" : "."); 813839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o return 0; 823839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o } 833839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o 843839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o if (!dir || (maxdepth < 0)) { 85c4e3d3f374b409500e3dd05c0b0eca6ac98a6b4eTheodore Ts'o retval = ext2fs_get_mem(4, name); 867b4e4534f9361b21d3fafdd88a58f133decee38cTheodore Ts'o if (retval) 877b4e4534f9361b21d3fafdd88a58f133decee38cTheodore Ts'o return retval; 883839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o strcpy(*name, "..."); 893839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o return 0; 903839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o } 913839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o 923839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o gp.search_ino = ino; 933839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o gp.parent = 0; 943839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o gp.name = 0; 953839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o gp.errcode = 0; 963839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o 973839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o retval = ext2fs_dir_iterate(fs, dir, 0, buf, get_pathname_proc, &gp); 983839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o if (retval) 993839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o goto cleanup; 1003839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o if (gp.errcode) { 1013839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o retval = gp.errcode; 1023839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o goto cleanup; 1033839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o } 1043839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o 1053839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o retval = ext2fs_get_pathname_int(fs, gp.parent, dir, maxdepth-1, 1063839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o buf, &parent_name); 1073839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o if (retval) 1083839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o goto cleanup; 1093839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o if (!ino) { 1103839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o *name = parent_name; 1113839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o return 0; 1123839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o } 1133839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o 114f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o if (gp.name) 1157b4e4534f9361b21d3fafdd88a58f133decee38cTheodore Ts'o retval = ext2fs_get_mem(strlen(parent_name)+strlen(gp.name)+2, 116c4e3d3f374b409500e3dd05c0b0eca6ac98a6b4eTheodore Ts'o &ret); 117f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o else 118c4e3d3f374b409500e3dd05c0b0eca6ac98a6b4eTheodore Ts'o retval = ext2fs_get_mem(strlen(parent_name)+5, &ret); 1197b4e4534f9361b21d3fafdd88a58f133decee38cTheodore Ts'o if (retval) 1203839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o goto cleanup; 1217b4e4534f9361b21d3fafdd88a58f133decee38cTheodore Ts'o 1223839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o ret[0] = 0; 1233839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o if (parent_name[1]) 1243839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o strcat(ret, parent_name); 1253839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o strcat(ret, "/"); 1263839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o if (gp.name) 1273839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o strcat(ret, gp.name); 1283839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o else 1293839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o strcat(ret, "???"); 1303839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o *name = ret; 131c4e3d3f374b409500e3dd05c0b0eca6ac98a6b4eTheodore Ts'o ext2fs_free_mem(&parent_name); 1323839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o retval = 0; 1333839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o 1343839e65723771b85975f4263102dd3ceec4523cTheodore Ts'ocleanup: 1353839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o if (gp.name) 136c4e3d3f374b409500e3dd05c0b0eca6ac98a6b4eTheodore Ts'o ext2fs_free_mem(&gp.name); 1373839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o return retval; 1383839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o} 1393839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o 14031dbecd482405e0d3a67eb58e1a1c8cb9f2ad83eTheodore Ts'oerrcode_t ext2fs_get_pathname(ext2_filsys fs, ext2_ino_t dir, ext2_ino_t ino, 1413839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o char **name) 1423839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o{ 1433839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o char *buf; 1443839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o errcode_t retval; 1453839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o 146f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS); 147f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o 148c4e3d3f374b409500e3dd05c0b0eca6ac98a6b4eTheodore Ts'o retval = ext2fs_get_mem(fs->blocksize, &buf); 1497b4e4534f9361b21d3fafdd88a58f133decee38cTheodore Ts'o if (retval) 1507b4e4534f9361b21d3fafdd88a58f133decee38cTheodore Ts'o return retval; 1513839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o if (dir == ino) 1523839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o ino = 0; 1533839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o retval = ext2fs_get_pathname_int(fs, dir, ino, 32, buf, name); 154c4e3d3f374b409500e3dd05c0b0eca6ac98a6b4eTheodore Ts'o ext2fs_free_mem(&buf); 1553839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o return retval; 1563839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o 1573839e65723771b85975f4263102dd3ceec4523cTheodore Ts'o} 158