1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 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 __FBSDID("$FreeBSD$"); 32 33 #include <sys/queue.h> 34 #include <sys/stat.h> 35 #include <archive.h> 36 #include <archive_entry.h> 37 #include <errno.h> 38 #include <libgen.h> 39 #include <stdio.h> 40 #include <string.h> 41 #include <sysexits.h> 42 43 #include "ar.h" 44 45 static void read_archive(struct bsdar *bsdar, char mode); 46 47 void 48 ar_mode_p(struct bsdar *bsdar) 49 { 50 51 read_archive(bsdar, 'p'); 52 } 53 54 void 55 ar_mode_t(struct bsdar *bsdar) 56 { 57 58 read_archive(bsdar, 't'); 59 } 60 61 void 62 ar_mode_x(struct bsdar *bsdar) 63 { 64 65 read_archive(bsdar, 'x'); 66 } 67 68 /* 69 * Handle read modes: 'x', 't' and 'p'. 70 */ 71 static void 72 read_archive(struct bsdar *bsdar, char mode) 73 { 74 struct archive *a; 75 struct archive_entry *entry; 76 struct stat sb; 77 struct tm *tp; 78 const char *bname; 79 const char *name; 80 mode_t md; 81 size_t size; 82 time_t mtime; 83 uid_t uid; 84 gid_t gid; 85 char **av; 86 char buf[25]; 87 char find; 88 int flags, r, i; 89 90 if ((a = archive_read_new()) == NULL) 91 bsdar_errc(bsdar, EX_SOFTWARE, 0, "archive_read_new failed"); 92 archive_read_support_format_ar(a); 93 AC(archive_read_open_filename(a, bsdar->filename, DEF_BLKSZ)); 94 95 for (;;) { 96 r = archive_read_next_header(a, &entry); 97 if (r == ARCHIVE_WARN || r == ARCHIVE_RETRY || 98 r == ARCHIVE_FATAL) 99 bsdar_warnc(bsdar, 0, "%s", archive_error_string(a)); 100 if (r == ARCHIVE_EOF || r == ARCHIVE_FATAL) 101 break; 102 if (r == ARCHIVE_RETRY) { 103 bsdar_warnc(bsdar, 0, "Retrying..."); 104 continue; 105 } 106 107 if ((name = archive_entry_pathname(entry)) == NULL) 108 break; 109 110 /* Skip pseudo members. */ 111 if (strcmp(name, "/") == 0 || strcmp(name, "//") == 0) 112 continue; 113 114 if (bsdar->argc > 0) { 115 find = 0; 116 for(i = 0; i < bsdar->argc; i++) { 117 av = &bsdar->argv[i]; 118 if (*av == NULL) 119 continue; 120 if ((bname = basename(*av)) == NULL) 121 bsdar_errc(bsdar, EX_SOFTWARE, errno, 122 "basename failed"); 123 if (strcmp(bname, name) != 0) 124 continue; 125 126 *av = NULL; 127 find = 1; 128 break; 129 } 130 if (!find) 131 continue; 132 } 133 134 if (mode == 't') { 135 if (bsdar->options & AR_V) { 136 md = archive_entry_mode(entry); 137 uid = archive_entry_uid(entry); 138 gid = archive_entry_gid(entry); 139 size = archive_entry_size(entry); 140 mtime = archive_entry_mtime(entry); 141 (void)strmode(md, buf); 142 (void)fprintf(stdout, "%s %6d/%-6d %8ju ", 143 buf + 1, uid, gid, (uintmax_t)size); 144 tp = localtime(&mtime); 145 (void)strftime(buf, sizeof(buf), 146 "%b %e %H:%M %Y", tp); 147 (void)fprintf(stdout, "%s %s", buf, name); 148 } else 149 (void)fprintf(stdout, "%s", name); 150 r = archive_read_data_skip(a); 151 if (r == ARCHIVE_WARN || r == ARCHIVE_RETRY || 152 r == ARCHIVE_FATAL) { 153 (void)fprintf(stdout, "\n"); 154 bsdar_warnc(bsdar, 0, "%s", 155 archive_error_string(a)); 156 } 157 158 if (r == ARCHIVE_FATAL) 159 break; 160 161 (void)fprintf(stdout, "\n"); 162 } else { 163 /* mode == 'x' || mode = 'p' */ 164 if (mode == 'p') { 165 if (bsdar->options & AR_V) { 166 (void)fprintf(stdout, "\n<%s>\n\n", 167 name); 168 fflush(stdout); 169 } 170 r = archive_read_data_into_fd(a, 1); 171 } else { 172 /* mode == 'x' */ 173 if (stat(name, &sb) != 0) { 174 if (errno != ENOENT) { 175 bsdar_warnc(bsdar, 0, 176 "stat %s failed", 177 bsdar->filename); 178 continue; 179 } 180 } else { 181 /* stat success, file exist */ 182 if (bsdar->options & AR_CC) 183 continue; 184 if (bsdar->options & AR_U && 185 archive_entry_mtime(entry) <= 186 sb.st_mtime) 187 continue; 188 } 189 190 if (bsdar->options & AR_V) 191 (void)fprintf(stdout, "x - %s\n", name); 192 /* Disallow absolute paths. */ 193 if (name[0] == '/') { 194 bsdar_warnc(bsdar, 0, 195 "Absolute path '%s'", name); 196 continue; 197 } 198 /* Basic path security flags. */ 199 flags = ARCHIVE_EXTRACT_SECURE_SYMLINKS | 200 ARCHIVE_EXTRACT_SECURE_NODOTDOT; 201 if (bsdar->options & AR_O) 202 flags |= ARCHIVE_EXTRACT_TIME; 203 204 r = archive_read_extract(a, entry, flags); 205 } 206 207 if (r) 208 bsdar_warnc(bsdar, 0, "%s", 209 archive_error_string(a)); 210 } 211 } 212 AC(archive_read_close(a)); 213 AC(archive_read_free(a)); 214 } 215