contrib/elftoolchain/ar/read.c

   1 /*-
   2  * Copyright (c) 2007 Kai Wang
   3  * Copyright (c) 2007 Tim Kientzle
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer
  11  *    in this position and unchanged.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
  17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  19  * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
  20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26  */
  27
  28 #include <sys/queue.h>
  29 #include <sys/stat.h>
  30
  31 #include <archive.h>
  32 #include <archive_entry.h>
  33 #include <assert.h>
  34 #include <errno.h>
  35 #include <libgen.h>
  36 #include <stdio.h>
  37 #include <string.h>
  38
  39 #include "ar.h"
  40
  41 ELFTC_VCSID("$Id: read.c 3180 2015-04-09 15:13:57Z emaste $");
  42
  43 /*
  44  * Handle read modes: 'x', 't' and 'p'.
  45  */
  46 void
  47 ar_read_archive(struct bsdar *bsdar, int mode)
  48 {
  49         FILE                     *out;
  50         struct archive           *a;
  51         struct archive_entry     *entry;
  52         struct stat               sb;
  53         struct tm                *tp;
  54         const char               *bname;
  55         const char               *name;
  56         mode_t                    md;
  57         size_t                    size;
  58         time_t                    mtime;
  59         uid_t                     uid;
  60         gid_t                     gid;
  61         char                    **av;
  62         char                      buf[25];
  63         char                      find;
  64         int                       i, flags, r;
  65
  66         assert(mode == 'p' || mode == 't' || mode == 'x');
  67
  68         if ((a = archive_read_new()) == NULL)
  69                 bsdar_errc(bsdar, 0, "archive_read_new failed");
  70         archive_read_support_format_ar(a);
  71         AC(archive_read_open_filename(a, bsdar->filename, DEF_BLKSZ));
  72
  73         out = bsdar->output;
  74
  75         for (;;) {
  76                 r = archive_read_next_header(a, &entry);
  77                 if (r == ARCHIVE_WARN || r == ARCHIVE_RETRY ||
  78                     r == ARCHIVE_FATAL)
  79                         bsdar_warnc(bsdar, 0, "%s", archive_error_string(a));
  80                 if (r == ARCHIVE_EOF || r == ARCHIVE_FATAL)
  81                         break;
  82                 if (r == ARCHIVE_RETRY) {
  83                         bsdar_warnc(bsdar, 0, "Retrying...");
  84                         continue;
  85                 }
  86
  87                 if (archive_format(a) == ARCHIVE_FORMAT_AR_BSD)
  88                         bsdar->options |= AR_BSD;
  89                 else
  90                         bsdar->options &= ~AR_BSD;
  91
  92                 if ((name = archive_entry_pathname(entry)) == NULL)
  93                         break;
  94
  95                 /* Skip pseudo members. */
  96                 if (bsdar_is_pseudomember(bsdar, name))
  97                         continue;
  98
  99                 if (bsdar->argc > 0) {
 100                         find = 0;
 101                         for(i = 0; i < bsdar->argc; i++) {
 102                                 av = &bsdar->argv[i];
 103                                 if (*av == NULL)
 104                                         continue;
 105                                 if ((bname = basename(*av)) == NULL)
 106                                         bsdar_errc(bsdar, errno,
 107                                             "basename failed");
 108                                 if (strcmp(bname, name) != 0)
 109                                         continue;
 110
 111                                 *av = NULL;
 112                                 find = 1;
 113                                 break;
 114                         }
 115                         if (!find)
 116                                 continue;
 117                 }
 118
 119                 if (mode == 't') {
 120                         if (bsdar->options & AR_V) {
 121                                 md = archive_entry_mode(entry);
 122                                 uid = archive_entry_uid(entry);
 123                                 gid = archive_entry_gid(entry);
 124                                 size = archive_entry_size(entry);
 125                                 mtime = archive_entry_mtime(entry);
 126                                 (void)fprintf(out, "%s %6d/%-6d %8ju ",
 127                                     bsdar_strmode(md) + 1, uid, gid,
 128                                     (uintmax_t)size);
 129                                 tp = localtime(&mtime);
 130                                 (void)strftime(buf, sizeof(buf),
 131                                     "%b %e %H:%M %Y", tp);
 132                                 (void)fprintf(out, "%s %s", buf, name);
 133                         } else
 134                                 (void)fprintf(out, "%s", name);
 135                         r = archive_read_data_skip(a);
 136                         if (r == ARCHIVE_WARN || r == ARCHIVE_RETRY ||
 137                             r == ARCHIVE_FATAL) {
 138                                 (void)fprintf(out, "\n");
 139                                 bsdar_warnc(bsdar, 0, "%s",
 140                                     archive_error_string(a));
 141                         }
 142
 143                         if (r == ARCHIVE_FATAL)
 144                                 break;
 145
 146                         (void)fprintf(out, "\n");
 147                 } else {
 148                         /* mode == 'x' || mode = 'p' */
 149                         if (mode == 'p') {
 150                                 if (bsdar->options & AR_V) {
 151                                         (void)fprintf(out, "\n<%s>\n\n",
 152                                             name);
 153                                         fflush(out);
 154                                 }
 155                                 r = archive_read_data_into_fd(a, fileno(out));
 156                         } else {
 157                                 /* mode == 'x' */
 158                                 if (stat(name, &sb) != 0) {
 159                                         if (errno != ENOENT) {
 160                                                 bsdar_warnc(bsdar, 0,
 161                                                     "stat %s failed",
 162                                                     bsdar->filename);
 163                                                 continue;
 164                                         }
 165                                 } else {
 166                                         /* stat success, file exist */
 167                                         if (bsdar->options & AR_CC)
 168                                                 continue;
 169                                         if (bsdar->options & AR_U &&
 170                                             archive_entry_mtime(entry) <=
 171                                             sb.st_mtime)
 172                                                 continue;
 173                                 }
 174
 175                                 if (bsdar->options & AR_V)
 176                                         (void)fprintf(out, "x - %s\n", name);
 177                                 /* Disallow absolute paths. */
 178                                 if (name[0] == '/') {
 179                                         bsdar_warnc(bsdar, 0,
 180                                             "Absolute path '%s'", name);
 181                                         continue;
 182                                 }
 183                                 /* Basic path security flags. */
 184                                 flags = ARCHIVE_EXTRACT_SECURE_SYMLINKS |
 185                                     ARCHIVE_EXTRACT_SECURE_NODOTDOT;
 186                                 if (bsdar->options & AR_O)
 187                                         flags |= ARCHIVE_EXTRACT_TIME;
 188
 189                                 r = archive_read_extract(a, entry, flags);
 190                         }
 191
 192                         if (r)
 193                                 bsdar_warnc(bsdar, 0, "%s",
 194                                     archive_error_string(a));
 195                 }
 196         }
 197         AC(archive_read_close(a));
 198         ACV(archive_read_free(a));
 199 }