1/* vi: set sw=4 ts=4: */ 2/* 3 * Mini ar implementation for busybox 4 * 5 * Copyright (C) 2000 by Glenn McGrath 6 * Written by Glenn McGrath <bug1@iinet.net.au> 1 June 2000 7 * 8 * Based in part on BusyBox tar, Debian dpkg-deb and GNU ar. 9 * 10 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. 11 * 12 * There is no single standard to adhere to so ar may not portable 13 * between different systems 14 * http://www.unix-systems.org/single_unix_specification_v2/xcu/ar.html 15 */ 16 17#include "libbb.h" 18#include "unarchive.h" 19 20static void header_verbose_list_ar(const file_header_t *file_header) 21{ 22 const char *mode = bb_mode_string(file_header->mode); 23 char *mtime; 24 25 mtime = ctime(&file_header->mtime); 26 mtime[16] = ' '; 27 memmove(&mtime[17], &mtime[20], 4); 28 mtime[21] = '\0'; 29 printf("%s %d/%d%7d %s %s\n", &mode[1], file_header->uid, file_header->gid, 30 (int) file_header->size, &mtime[4], file_header->name); 31} 32 33#define AR_CTX_PRINT 0x01 34#define AR_CTX_LIST 0x02 35#define AR_CTX_EXTRACT 0x04 36#define AR_OPT_PRESERVE_DATE 0x08 37#define AR_OPT_VERBOSE 0x10 38#define AR_OPT_CREATE 0x20 39#define AR_OPT_INSERT 0x40 40 41int ar_main(int argc, char **argv); 42int ar_main(int argc, char **argv) 43{ 44 static const char msg_unsupported_err[] ALIGN1 = 45 "archive %s is not supported"; 46 47 archive_handle_t *archive_handle; 48 unsigned opt; 49 char magic[8]; 50 51 archive_handle = init_handle(); 52 53 /* Prepend '-' to the first argument if required */ 54 opt_complementary = "--:p:t:x:-1:p--tx:t--px:x--pt"; 55 opt = getopt32(argv, "ptxovcr"); 56 57 if (opt & AR_CTX_PRINT) { 58 archive_handle->action_data = data_extract_to_stdout; 59 } 60 if (opt & AR_CTX_LIST) { 61 archive_handle->action_header = header_list; 62 } 63 if (opt & AR_CTX_EXTRACT) { 64 archive_handle->action_data = data_extract_all; 65 } 66 if (opt & AR_OPT_PRESERVE_DATE) { 67 archive_handle->flags |= ARCHIVE_PRESERVE_DATE; 68 } 69 if (opt & AR_OPT_VERBOSE) { 70 archive_handle->action_header = header_verbose_list_ar; 71 } 72 if (opt & AR_OPT_CREATE) { 73 bb_error_msg_and_die(msg_unsupported_err, "creation"); 74 } 75 if (opt & AR_OPT_INSERT) { 76 bb_error_msg_and_die(msg_unsupported_err, "insertion"); 77 } 78 79 archive_handle->src_fd = xopen(argv[optind++], O_RDONLY); 80 81 while (optind < argc) { 82 archive_handle->filter = filter_accept_list; 83 llist_add_to(&(archive_handle->accept), argv[optind++]); 84 } 85 86 xread(archive_handle->src_fd, magic, 7); 87 if (strncmp(magic, "!<arch>", 7) != 0) { 88 bb_error_msg_and_die("invalid ar magic"); 89 } 90 archive_handle->offset += 7; 91 92 while (get_header_ar(archive_handle) == EXIT_SUCCESS) 93 continue; 94 95 return EXIT_SUCCESS; 96} 97