1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2007 Kai Wang 5 * Copyright (c) 2007 Tim Kientzle 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 #include <sys/queue.h> 32 #include <sys/stat.h> 33 #include <archive.h> 34 #include <archive_entry.h> 35 #include <assert.h> 36 #include <errno.h> 37 #include <libgen.h> 38 #include <stdio.h> 39 #include <stdlib.h> 40 #include <string.h> 41 42 #include "ar.h" 43 44 /* 45 * Handle read modes: 'x', 't' and 'p'. 46 */ 47 int 48 ar_read_archive(struct bsdar *bsdar, int mode, FILE *out) 49 { 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 exitcode, flags, r, i; 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 exitcode = EXIT_SUCCESS; 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, archive_errno(a), "%s", 80 archive_error_string(a)); 81 if (r == ARCHIVE_EOF || r == ARCHIVE_FATAL) 82 break; 83 if (r == ARCHIVE_RETRY) { 84 bsdar_warnc(bsdar, 0, "Retrying..."); 85 continue; 86 } 87 88 if ((name = archive_entry_pathname(entry)) == NULL) 89 break; 90 91 /* Skip pseudo members. */ 92 if (strcmp(name, "/") == 0 || strcmp(name, "//") == 0 || 93 strcmp(name, "/SYM64/") == 0) 94 continue; 95 96 if (bsdar->argc > 0) { 97 find = 0; 98 for(i = 0; i < bsdar->argc; i++) { 99 av = &bsdar->argv[i]; 100 if (*av == NULL) 101 continue; 102 if ((bname = basename(*av)) == NULL) 103 bsdar_errc(bsdar, errno, 104 "basename failed"); 105 if (strcmp(bname, name) != 0) 106 continue; 107 108 *av = NULL; 109 find = 1; 110 break; 111 } 112 if (!find) 113 continue; 114 } 115 116 if (mode == 't') { 117 if (bsdar->options & AR_V) { 118 md = archive_entry_mode(entry); 119 uid = archive_entry_uid(entry); 120 gid = archive_entry_gid(entry); 121 size = archive_entry_size(entry); 122 mtime = archive_entry_mtime(entry); 123 (void)strmode(md, buf); 124 (void)fprintf(out, "%s %6d/%-6d %8ju ", 125 buf + 1, uid, gid, (uintmax_t)size); 126 tp = localtime(&mtime); 127 (void)strftime(buf, sizeof(buf), 128 "%b %e %H:%M %Y", tp); 129 (void)fprintf(out, "%s %s", buf, name); 130 } else 131 (void)fprintf(out, "%s", name); 132 r = archive_read_data_skip(a); 133 if (r == ARCHIVE_WARN || r == ARCHIVE_RETRY || 134 r == ARCHIVE_FATAL) { 135 (void)fprintf(out, "\n"); 136 bsdar_warnc(bsdar, archive_errno(a), "%s", 137 archive_error_string(a)); 138 } 139 140 if (r == ARCHIVE_FATAL) 141 break; 142 143 (void)fprintf(out, "\n"); 144 } else { 145 /* mode == 'x' || mode = 'p' */ 146 if (mode == 'p') { 147 if (bsdar->options & AR_V) { 148 (void)fprintf(out, "\n<%s>\n\n", 149 name); 150 fflush(out); 151 } 152 r = archive_read_data_into_fd(a, 1); 153 } else { 154 /* mode == 'x' */ 155 if (stat(name, &sb) != 0) { 156 if (errno != ENOENT) { 157 bsdar_warnc(bsdar, 0, 158 "stat %s failed", 159 bsdar->filename); 160 continue; 161 } 162 } else { 163 /* stat success, file exist */ 164 if (bsdar->options & AR_CC) 165 continue; 166 if (bsdar->options & AR_U && 167 archive_entry_mtime(entry) <= 168 sb.st_mtime) 169 continue; 170 } 171 172 if (bsdar->options & AR_V) 173 (void)fprintf(out, "x - %s\n", name); 174 /* Disallow absolute paths. */ 175 if (name[0] == '/') { 176 bsdar_warnc(bsdar, 0, 177 "Absolute path '%s'", name); 178 continue; 179 } 180 /* Basic path security flags. */ 181 flags = ARCHIVE_EXTRACT_SECURE_SYMLINKS | 182 ARCHIVE_EXTRACT_SECURE_NODOTDOT; 183 if (bsdar->options & AR_O) 184 flags |= ARCHIVE_EXTRACT_TIME; 185 186 r = archive_read_extract(a, entry, flags); 187 } 188 189 if (r) { 190 bsdar_warnc(bsdar, archive_errno(a), "%s", 191 archive_error_string(a)); 192 exitcode = EXIT_FAILURE; 193 } 194 } 195 } 196 197 if (r == ARCHIVE_FATAL) 198 exitcode = EXIT_FAILURE; 199 200 AC(archive_read_close(a)); 201 AC(archive_read_free(a)); 202 203 return (exitcode); 204 } 205