usr.bin/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/cdefs.h>
  29 __FBSDID("$FreeBSD$");
  30
  31 #include <sys/queue.h>
  32 #include <sys/stat.h>
  33 #include <archive.h>
  34 #include <archive_entry.h>
  35 #include <errno.h>
  36 #include <libgen.h>
  37 #include <stdio.h>
  38 #include <string.h>
  39 #include <sysexits.h>
  40
  41 #include "ar.h"
  42
  43 static void read_archive(struct bsdar *bsdar, char mode);
  44
  45 void
  46 ar_mode_p(struct bsdar *bsdar)
  47 {
  48
  49         read_archive(bsdar, 'p');
  50 }
  51
  52 void
  53 ar_mode_t(struct bsdar *bsdar)
  54 {
  55
  56         read_archive(bsdar, 't');
  57 }
  58
  59 void
  60 ar_mode_x(struct bsdar *bsdar)
  61 {
  62
  63         read_archive(bsdar, 'x');
  64 }
  65
  66 /*
  67  * Handle read modes: 'x', 't' and 'p'.
  68  */
  69 static void
  70 read_archive(struct bsdar *bsdar, char mode)
  71 {
  72         struct archive           *a;
  73         struct archive_entry     *entry;
  74         struct stat               sb;
  75         struct tm                *tp;
  76         const char               *bname;
  77         const char               *name;
  78         mode_t                    md;
  79         size_t                    size;
  80         time_t                    mtime;
  81         uid_t                     uid;
  82         gid_t                     gid;
  83         char                    **av;
  84         char                      buf[25];
  85         char                      find;
  86         int                       flags, r, i;
  87
  88         if ((a = archive_read_new()) == NULL)
  89                 bsdar_errc(bsdar, EX_SOFTWARE, 0, "archive_read_new failed");
  90         archive_read_support_compression_none(a);
  91         archive_read_support_format_ar(a);
  92         AC(archive_read_open_file(a, bsdar->filename, DEF_BLKSZ));
  93
  94         for (;;) {
  95                 r = archive_read_next_header(a, &entry);
  96                 if (r == ARCHIVE_WARN || r == ARCHIVE_RETRY ||
  97                     r == ARCHIVE_FATAL)
  98                         bsdar_warnc(bsdar, 0, "%s", archive_error_string(a));
  99                 if (r == ARCHIVE_EOF || r == ARCHIVE_FATAL)
 100                         break;
 101                 if (r == ARCHIVE_RETRY) {
 102                         bsdar_warnc(bsdar, 0, "Retrying...");
 103                         continue;
 104                 }
 105
 106                 name = archive_entry_pathname(entry);
 107
 108                 /* Skip pseudo members. */
 109                 if (strcmp(name, "/") == 0 || strcmp(name, "//") == 0)
 110                         continue;
 111
 112                 if (bsdar->argc > 0) {
 113                         find = 0;
 114                         for(i = 0; i < bsdar->argc; i++) {
 115                                 av = &bsdar->argv[i];
 116                                 if (*av == NULL)
 117                                         continue;
 118                                 if ((bname = basename(*av)) == NULL)
 119                                         bsdar_errc(bsdar, EX_SOFTWARE, errno,
 120                                             "basename failed");
 121                                 if (strcmp(bname, name) != 0)
 122                                         continue;
 123
 124                                 *av = NULL;
 125                                 find = 1;
 126                                 break;
 127                         }
 128                         if (!find)
 129                                 continue;
 130                 }
 131
 132                 if (mode == 't') {
 133                         if (bsdar->options & AR_V) {
 134                                 md = archive_entry_mode(entry);
 135                                 uid = archive_entry_uid(entry);
 136                                 gid = archive_entry_gid(entry);
 137                                 size = archive_entry_size(entry);
 138                                 mtime = archive_entry_mtime(entry);
 139                                 (void)strmode(md, buf);
 140                                 (void)fprintf(stdout, "%s %6d/%-6d %8ju ",
 141                                     buf + 1, uid, gid, (uintmax_t)size);
 142                                 tp = localtime(&mtime);
 143                                 (void)strftime(buf, sizeof(buf),
 144                                     "%b %e %H:%M %Y", tp);
 145                                 (void)fprintf(stdout, "%s %s", buf, name);
 146                         } else
 147                                 (void)fprintf(stdout, "%s", name);
 148                         r = archive_read_data_skip(a);
 149                         if (r == ARCHIVE_WARN || r == ARCHIVE_RETRY ||
 150                             r == ARCHIVE_FATAL) {
 151                                 (void)fprintf(stdout, "\n");
 152                                 bsdar_warnc(bsdar, 0, "%s",
 153                                     archive_error_string(a));
 154                         }
 155
 156                         if (r == ARCHIVE_FATAL)
 157                                 break;
 158
 159                         (void)fprintf(stdout, "\n");
 160                 } else {
 161                         /* mode == 'x' || mode = 'p' */
 162                         if (mode == 'p') {
 163                                 if (bsdar->options & AR_V) {
 164                                         (void)fprintf(stdout, "\n<%s>\n\n",
 165                                             name);
 166                                         fflush(stdout);
 167                                 }
 168                                 r = archive_read_data_into_fd(a, 1);
 169                         } else {
 170                                 /* mode == 'x' */
 171                                 if (stat(name, &sb) != 0) {
 172                                         if (errno != ENOENT) {
 173                                                 bsdar_warnc(bsdar, 0,
 174                                                     "stat %s failed",
 175                                                     bsdar->filename);
 176                                                 continue;
 177                                         }
 178                                 } else {
 179                                         /* stat success, file exist */
 180                                         if (bsdar->options & AR_CC)
 181                                                 continue;
 182                                         if (bsdar->options & AR_U &&
 183                                             archive_entry_mtime(entry) <=
 184                                             sb.st_mtime)
 185                                                 continue;
 186                                 }
 187
 188                                 if (bsdar->options & AR_V)
 189                                         (void)fprintf(stdout, "x - %s\n", name);
 190                                 flags = 0;
 191                                 if (bsdar->options & AR_O)
 192                                         flags |= ARCHIVE_EXTRACT_TIME;
 193
 194                                 r = archive_read_extract(a, entry, flags);
 195                         }
 196
 197                         if (r)
 198                                 bsdar_warnc(bsdar, 0, "%s",
 199                                     archive_error_string(a));
 200                 }
 201         }
 202         AC(archive_read_close(a));
 203         AC(archive_read_finish(a));
 204 }