1 /*- 2 * Copyright (c) 2003-2007 Tim Kientzle 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT, 18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #include "archive_platform.h" 27 __FBSDID("$FreeBSD: src/lib/libarchive/archive_entry_stat.c,v 1.1 2007/05/29 01:00:18 kientzle Exp $"); 28 29 #ifdef HAVE_SYS_STAT_H 30 #include <sys/stat.h> 31 #endif 32 #ifdef HAVE_STDLIB_H 33 #include <stdlib.h> 34 #endif 35 36 #include "archive_entry.h" 37 #include "archive_entry_private.h" 38 39 const struct stat * 40 archive_entry_stat(struct archive_entry *entry) 41 { 42 struct stat *st; 43 if (entry->stat == NULL) { 44 entry->stat = malloc(sizeof(*st)); 45 if (entry->stat == NULL) 46 return (NULL); 47 entry->stat_valid = 0; 48 } 49 50 /* 51 * If none of the underlying fields have been changed, we 52 * don't need to regenerate. In theory, we could use a bitmap 53 * here to flag only those items that have changed, but the 54 * extra complexity probably isn't worth it. It will be very 55 * rare for anyone to change just one field then request a new 56 * stat structure. 57 */ 58 if (entry->stat_valid) 59 return (entry->stat); 60 61 st = entry->stat; 62 /* 63 * Use the public interfaces to extract items, so that 64 * the appropriate conversions get invoked. 65 */ 66 st->st_atime = archive_entry_atime(entry); 67 st->st_ctime = archive_entry_ctime(entry); 68 st->st_mtime = archive_entry_mtime(entry); 69 st->st_dev = archive_entry_dev(entry); 70 st->st_gid = archive_entry_gid(entry); 71 st->st_uid = archive_entry_uid(entry); 72 st->st_ino = archive_entry_ino(entry); 73 st->st_nlink = archive_entry_nlink(entry); 74 st->st_rdev = archive_entry_rdev(entry); 75 st->st_size = archive_entry_size(entry); 76 st->st_mode = archive_entry_mode(entry); 77 78 /* 79 * On systems that support high-res timestamps, copy that 80 * information into struct stat. 81 */ 82 #if HAVE_STRUCT_STAT_ST_MTIMESPEC_TV_NSEC 83 st->st_atimespec.tv_nsec = archive_entry_atime_nsec(entry); 84 st->st_ctimespec.tv_nsec = archive_entry_ctime_nsec(entry); 85 st->st_mtimespec.tv_nsec = archive_entry_mtime_nsec(entry); 86 #elif HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC 87 st->st_atim.tv_nsec = archive_entry_atime_nsec(entry); 88 st->st_ctim.tv_nsec = archive_entry_ctime_nsec(entry); 89 st->st_mtim.tv_nsec = archive_entry_mtime_nsec(entry); 90 #endif 91 92 /* 93 * TODO: On Linux, store 32 or 64 here depending on whether 94 * the cached stat structure is a stat32 or a stat64. This 95 * will allow us to support both variants interchangably. 96 */ 97 entry->stat_valid = 1; 98 99 return (st); 100 } 101