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
28 #ifdef HAVE_SYS_STAT_H
29 #include <sys/stat.h>
30 #endif
31 #ifdef HAVE_STDLIB_H
32 #include <stdlib.h>
33 #endif
34
35 #include "archive_entry.h"
36 #include "archive_entry_private.h"
37
38 const struct stat *
archive_entry_stat(struct archive_entry * entry)39 archive_entry_stat(struct archive_entry *entry)
40 {
41 int64_t size;
42 struct stat *st;
43 if (entry->stat == NULL) {
44 entry->stat = calloc(1, 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 #if HAVE_STRUCT_STAT_ST_BIRTHTIME
68 st->st_birthtime = archive_entry_birthtime(entry);
69 #endif
70 st->st_ctime = archive_entry_ctime(entry);
71 st->st_mtime = archive_entry_mtime(entry);
72 st->st_dev = archive_entry_dev(entry);
73 st->st_gid = (gid_t)archive_entry_gid(entry);
74 st->st_uid = (uid_t)archive_entry_uid(entry);
75 st->st_ino = (ino_t)archive_entry_ino64(entry);
76 st->st_nlink = archive_entry_nlink(entry);
77 st->st_rdev = archive_entry_rdev(entry);
78 size = archive_entry_size(entry);
79 st->st_size = (off_t)size;
80 if (st->st_size < 0 || (int64_t)st->st_size != size)
81 st->st_size = 0;
82 st->st_mode = archive_entry_mode(entry);
83
84 /*
85 * On systems that support high-res timestamps, copy that
86 * information into struct stat.
87 */
88 #if HAVE_STRUCT_STAT_ST_MTIMESPEC_TV_NSEC
89 st->st_atimespec.tv_nsec = archive_entry_atime_nsec(entry);
90 st->st_ctimespec.tv_nsec = archive_entry_ctime_nsec(entry);
91 st->st_mtimespec.tv_nsec = archive_entry_mtime_nsec(entry);
92 #elif HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC
93 st->st_atim.tv_nsec = archive_entry_atime_nsec(entry);
94 st->st_ctim.tv_nsec = archive_entry_ctime_nsec(entry);
95 st->st_mtim.tv_nsec = archive_entry_mtime_nsec(entry);
96 #elif HAVE_STRUCT_STAT_ST_MTIME_N
97 st->st_atime_n = archive_entry_atime_nsec(entry);
98 st->st_ctime_n = archive_entry_ctime_nsec(entry);
99 st->st_mtime_n = archive_entry_mtime_nsec(entry);
100 #elif HAVE_STRUCT_STAT_ST_UMTIME
101 st->st_uatime = archive_entry_atime_nsec(entry) / 1000;
102 st->st_uctime = archive_entry_ctime_nsec(entry) / 1000;
103 st->st_umtime = archive_entry_mtime_nsec(entry) / 1000;
104 #elif HAVE_STRUCT_STAT_ST_MTIME_USEC
105 st->st_atime_usec = archive_entry_atime_nsec(entry) / 1000;
106 st->st_ctime_usec = archive_entry_ctime_nsec(entry) / 1000;
107 st->st_mtime_usec = archive_entry_mtime_nsec(entry) / 1000;
108 #endif
109 #if HAVE_STRUCT_STAT_ST_BIRTHTIMESPEC_TV_NSEC
110 st->st_birthtimespec.tv_nsec = archive_entry_birthtime_nsec(entry);
111 #endif
112
113 /*
114 * TODO: On Linux, store 32 or 64 here depending on whether
115 * the cached stat structure is a stat32 or a stat64. This
116 * will allow us to support both variants interchangeably.
117 */
118 entry->stat_valid = 1;
119
120 return (st);
121 }
122