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 } 200