diff options
Diffstat (limited to 'release/src/router/busybox/archival/unzip.c')
| -rw-r--r-- | release/src/router/busybox/archival/unzip.c | 245 |
1 files changed, 245 insertions, 0 deletions
diff --git a/release/src/router/busybox/archival/unzip.c b/release/src/router/busybox/archival/unzip.c new file mode 100644 index 00000000..f2d7f491 --- /dev/null +++ b/release/src/router/busybox/archival/unzip.c @@ -0,0 +1,245 @@ +/* vi: set sw=4 ts=4: */ +/* + * Mini unzip implementation for busybox + * + * Copyright (C) 2001 by Laurence Anderson + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +/* For reference to format see http://www.pkware.com/support/appnote.html */ + +/* TODO Endian issues, exclude, should we accept input from stdin ? */ + +#include <fcntl.h> +#include <getopt.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include "unarchive.h" +#include "busybox.h" + +#define ZIP_FILEHEADER_MAGIC 0x04034b50 +#define ZIP_CDS_MAGIC 0x02014b50 +#define ZIP_CDS_END_MAGIC 0x06054b50 +#define ZIP_DD_MAGIC 0x08074b50 + +extern unsigned int gunzip_crc; +extern unsigned int gunzip_bytes_out; + +static void header_list_unzip(const file_header_t *file_header) +{ + printf(" inflating: %s\n", file_header->name); +} + +static void header_verbose_list_unzip(const file_header_t *file_header) +{ + unsigned int dostime = (unsigned int) file_header->mtime; + + /* can printf arguments cut of the decade component ? */ + unsigned short year = 1980 + ((dostime & 0xfe000000) >> 25); + while (year >= 100) { + year -= 100; + } + + printf("%9u %02u-%02u-%02u %02u:%02u %s\n", + (unsigned int) file_header->size, + (dostime & 0x01e00000) >> 21, + (dostime & 0x001f0000) >> 16, + year, + (dostime & 0x0000f800) >> 11, + (dostime & 0x000007e0) >> 5, + file_header->name); +} + +extern int unzip_main(int argc, char **argv) +{ + union { + unsigned char raw[26]; + struct { + unsigned short version; /* 0-1 */ + unsigned short flags; /* 2-3 */ + unsigned short method; /* 4-5 */ + unsigned short modtime; /* 6-7 */ + unsigned short moddate; /* 8-9 */ + unsigned int crc32 __attribute__ ((packed)); /* 10-13 */ + unsigned int cmpsize __attribute__ ((packed));; /* 14-17 */ + unsigned int ucmpsize __attribute__ ((packed));; /* 18-21 */ + unsigned short filename_len; /* 22-23 */ + unsigned short extra_len; /* 24-25 */ + } formated __attribute__ ((packed)); + } zip_header; + + archive_handle_t *archive_handle; + unsigned int total_size = 0; + unsigned int total_entries = 0; + char *base_dir = NULL; + int opt = 0; + + /* Initialise */ + archive_handle = init_handle(); + archive_handle->action_data = NULL; + archive_handle->action_header = header_list_unzip; + + while ((opt = getopt(argc, argv, "lnopqd:")) != -1) { + switch (opt) { + case 'l': /* list */ + archive_handle->action_header = header_verbose_list_unzip; + archive_handle->action_data = data_skip; + break; + case 'n': /* never overwright existing files */ + break; + case 'o': + archive_handle->flags = ARCHIVE_EXTRACT_UNCONDITIONAL; + break; + case 'p': /* extract files to stdout */ + archive_handle->action_data = data_extract_to_stdout; + break; + case 'q': /* Extract files quietly */ + archive_handle->action_header = header_skip; + break; + case 'd': /* Extract files to specified base directory*/ + base_dir = optarg; + break; +#if 0 + case 'x': /* Exclude the specified files */ + archive_handle->filter = filter_accept_reject_list; + break; +#endif + default: + bb_show_usage(); + } + } + + if (argc == optind) { + bb_show_usage(); + } + + printf("Archive: %s\n", argv[optind]); + if (archive_handle->action_header == header_verbose_list_unzip) { + printf(" Length Date Time Name\n"); + printf(" -------- ---- ---- ----\n"); + } + + if (*argv[optind] == '-') { + archive_handle->src_fd = fileno(stdin); + archive_handle->seek = seek_by_char; + } else { + archive_handle->src_fd = bb_xopen(argv[optind++], O_RDONLY); + } + + if ((base_dir) && (chdir(base_dir))) { + bb_perror_msg_and_die("Couldnt chdir"); + } + + while (optind < argc) { + archive_handle->filter = filter_accept_list; + archive_handle->accept = llist_add_to(archive_handle->accept, argv[optind]); + optind++; + } + + while (1) { + unsigned int magic; + int dst_fd; + + /* TODO Endian issues */ + archive_xread_all(archive_handle, &magic, 4); + archive_handle->offset += 4; + + if (magic == ZIP_CDS_MAGIC) { + break; + } + else if (magic != ZIP_FILEHEADER_MAGIC) { + bb_error_msg_and_die("Invlaide zip magic"); + } + + /* Read the file header */ + archive_xread_all(archive_handle, zip_header.raw, 26); + archive_handle->offset += 26; + archive_handle->file_header->mode = S_IFREG | 0777; + + if (zip_header.formated.method != 8) { + bb_error_msg_and_die("Unsupported compression method %d\n", zip_header.formated.method); + } + + /* Read filename */ + archive_handle->file_header->name = xmalloc(zip_header.formated.filename_len + 1); + archive_xread_all(archive_handle, archive_handle->file_header->name, zip_header.formated.filename_len); + archive_handle->offset += zip_header.formated.filename_len; + archive_handle->file_header->name[zip_header.formated.filename_len] = '\0'; + + /* Skip extra header bits */ + archive_handle->file_header->size = zip_header.formated.extra_len; + data_skip(archive_handle); + archive_handle->offset += zip_header.formated.extra_len; + + /* Handle directories */ + archive_handle->file_header->mode = S_IFREG | 0777; + if (last_char_is(archive_handle->file_header->name, '/')) { + archive_handle->file_header->mode ^= S_IFREG; + archive_handle->file_header->mode |= S_IFDIR; + } + + /* Data section */ + archive_handle->file_header->size = zip_header.formated.cmpsize; + if (archive_handle->action_data) { + archive_handle->action_data(archive_handle); + } else { + dst_fd = bb_xopen(archive_handle->file_header->name, O_WRONLY | O_CREAT); + inflate(archive_handle->src_fd, dst_fd); + close(dst_fd); + chmod(archive_handle->file_header->name, archive_handle->file_header->mode); + + /* Validate decompression - crc */ + if (zip_header.formated.crc32 != (gunzip_crc ^ 0xffffffffL)) { + bb_error_msg("Invalid compressed data--crc error"); + } + + /* Validate decompression - size */ + if (gunzip_bytes_out != zip_header.formated.ucmpsize) { + bb_error_msg("Invalid compressed data--length error"); + } + } + + /* local file descriptor section */ + archive_handle->offset += zip_header.formated.cmpsize; + /* This ISNT unix time */ + archive_handle->file_header->mtime = zip_header.formated.modtime | (zip_header.formated.moddate << 16); + archive_handle->file_header->size = zip_header.formated.ucmpsize; + total_size += archive_handle->file_header->size; + total_entries++; + + archive_handle->action_header(archive_handle->file_header); + + /* Data descriptor section */ + if (zip_header.formated.flags & 4) { + /* skip over duplicate crc, compressed size and uncompressed size */ + unsigned short i; + for (i = 0; i != 12; i++) { + archive_xread_char(archive_handle); + } + archive_handle->offset += 12; + } + } + /* Central directory section */ + + if (archive_handle->action_header == header_verbose_list_unzip) { + printf(" -------- -------\n"); + printf("%9d %d files\n", total_size, total_entries); + } + + return(EXIT_SUCCESS); +} |