contrib/libarchive/libarchive/archive_entry_stat.c

   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 1.2 2008/09/30 03:53:03 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 #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 = archive_entry_gid(entry);
  74         st->st_uid = archive_entry_uid(entry);
  75         st->st_ino = archive_entry_ino(entry);
  76         st->st_nlink = archive_entry_nlink(entry);
  77         st->st_rdev = archive_entry_rdev(entry);
  78         st->st_size = archive_entry_size(entry);
  79         st->st_mode = archive_entry_mode(entry);
  80
  81         /*
  82          * On systems that support high-res timestamps, copy that
  83          * information into struct stat.
  84          */
  85 #if HAVE_STRUCT_STAT_ST_MTIMESPEC_TV_NSEC
  86         st->st_atimespec.tv_nsec = archive_entry_atime_nsec(entry);
  87         st->st_ctimespec.tv_nsec = archive_entry_ctime_nsec(entry);
  88         st->st_mtimespec.tv_nsec = archive_entry_mtime_nsec(entry);
  89 #elif HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC
  90         st->st_atim.tv_nsec = archive_entry_atime_nsec(entry);
  91         st->st_ctim.tv_nsec = archive_entry_ctime_nsec(entry);
  92         st->st_mtim.tv_nsec = archive_entry_mtime_nsec(entry);
  93 #elif HAVE_STRUCT_STAT_ST_MTIME_N
  94         st->st_atime_n = archive_entry_atime_nsec(entry);
  95         st->st_ctime_n = archive_entry_ctime_nsec(entry);
  96         st->st_mtime_n = archive_entry_mtime_nsec(entry);
  97 #elif HAVE_STRUCT_STAT_ST_UMTIME
  98         st->st_uatime = archive_entry_atime_nsec(entry) / 1000;
  99         st->st_uctime = archive_entry_ctime_nsec(entry) / 1000;
 100         st->st_umtime = archive_entry_mtime_nsec(entry) / 1000;
 101 #elif HAVE_STRUCT_STAT_ST_MTIME_USEC
 102         st->st_atime_usec = archive_entry_atime_nsec(entry) / 1000;
 103         st->st_ctime_usec = archive_entry_ctime_nsec(entry) / 1000;
 104         st->st_mtime_usec = archive_entry_mtime_nsec(entry) / 1000;
 105 #endif
 106 #if HAVE_STRUCT_STAT_ST_BIRTHTIMESPEC_TV_NSEC
 107         st->st_birthtimespec.tv_nsec = archive_entry_birthtime_nsec(entry);
 108 #endif
 109
 110         /*
 111          * TODO: On Linux, store 32 or 64 here depending on whether
 112          * the cached stat structure is a stat32 or a stat64.  This
 113          * will allow us to support both variants interchangably.
 114          */
 115         entry->stat_valid = 1;
 116
 117         return (st);
 118 }