X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=archival%2Flibunarchive%2Fget_header_ar.c;h=cabb4101ba52c0da246f41ad8de5e0685e9fc164;hb=5d725462d44268f9a86030daaa6f6396d32f796c;hp=25fc83781225c93a34accb5bf29a975ef7a418f4;hpb=91e464632b391ff06cb56ef2b7c1efbaf9592f42;p=oweals%2Fbusybox.git diff --git a/archival/libunarchive/get_header_ar.c b/archival/libunarchive/get_header_ar.c index 25fc83781..cabb4101b 100644 --- a/archival/libunarchive/get_header_ar.c +++ b/archival/libunarchive/get_header_ar.c @@ -1,105 +1,94 @@ -/* - * 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. +/* vi: set sw=4 ts=4: */ +/* Copyright 2001 Glenn McGrath. * - * 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 Library 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. + * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. */ -#include -#include -#include -#include -#include "unarchive.h" #include "libbb.h" +#include "unarchive.h" -extern char get_header_ar(archive_handle_t *archive_handle) +char get_header_ar(archive_handle_t *archive_handle) { file_header_t *typed = archive_handle->file_header; union { char raw[60]; - struct { - char name[16]; - char date[12]; - char uid[6]; - char gid[6]; - char mode[8]; - char size[10]; - char magic[2]; - } formated; + struct { + char name[16]; + char date[12]; + char uid[6]; + char gid[6]; + char mode[8]; + char size[10]; + char magic[2]; + } formatted; } ar; #ifdef CONFIG_FEATURE_AR_LONG_FILENAMES static char *ar_long_names; static unsigned int ar_long_name_size; #endif - /* dont use bb_xread as we want to handle the error ourself */ + /* dont use xread as we want to handle the error ourself */ if (read(archive_handle->src_fd, ar.raw, 60) != 60) { /* End Of File */ return(EXIT_FAILURE); } - /* Some ar entries have a trailing '\n' after the previous data entry */ + /* ar header starts on an even byte (2 byte aligned) + * '\n' is used for padding + */ if (ar.raw[0] == '\n') { /* fix up the header, we started reading 1 byte too early */ memmove(ar.raw, &ar.raw[1], 59); - ar.raw[59] = bb_xread_char(archive_handle->src_fd); + ar.raw[59] = xread_char(archive_handle->src_fd); archive_handle->offset++; } archive_handle->offset += 60; /* align the headers based on the header magic */ - if ((ar.formated.magic[0] != '`') || (ar.formated.magic[1] != '\n')) { + if ((ar.formatted.magic[0] != '`') || (ar.formatted.magic[1] != '\n')) { bb_error_msg_and_die("Invalid ar header"); } - typed->mode = strtol(ar.formated.mode, NULL, 8); - typed->mtime = atoi(ar.formated.date); - typed->uid = atoi(ar.formated.uid); - typed->gid = atoi(ar.formated.gid); - typed->size = atoi(ar.formated.size); + typed->mode = strtol(ar.formatted.mode, NULL, 8); + typed->mtime = atoi(ar.formatted.date); + typed->uid = atoi(ar.formatted.uid); + typed->gid = atoi(ar.formatted.gid); + typed->size = atoi(ar.formatted.size); /* long filenames have '/' as the first character */ - if (ar.formated.name[0] == '/') { + if (ar.formatted.name[0] == '/') { #ifdef CONFIG_FEATURE_AR_LONG_FILENAMES - if (ar.formated.name[1] == '/') { + if (ar.formatted.name[1] == '/') { /* If the second char is a '/' then this entries data section * stores long filename for multiple entries, they are stored * in static variable long_names for use in future entries */ ar_long_name_size = typed->size; ar_long_names = xmalloc(ar_long_name_size); - bb_xread_all(archive_handle->src_fd, ar_long_names, ar_long_name_size); + xread(archive_handle->src_fd, ar_long_names, ar_long_name_size); archive_handle->offset += ar_long_name_size; /* This ar entries data section only contained filenames for other records * they are stored in the static ar_long_names for future reference */ return (get_header_ar(archive_handle)); /* Return next header */ - } else if (ar.formated.name[1] == ' ') { + } else if (ar.formatted.name[1] == ' ') { /* This is the index of symbols in the file for compilers */ data_skip(archive_handle); + archive_handle->offset += typed->size; return (get_header_ar(archive_handle)); /* Return next header */ } else { /* The number after the '/' indicates the offset in the ar data section (saved in variable long_name) that conatains the real filename */ - const unsigned int long_offset = atoi(&ar.formated.name[1]); + const unsigned int long_offset = atoi(&ar.formatted.name[1]); if (long_offset >= ar_long_name_size) { bb_error_msg_and_die("Cant resolve long filename"); } - typed->name = bb_xstrdup(ar_long_names + long_offset); + typed->name = xstrdup(ar_long_names + long_offset); } #else bb_error_msg_and_die("long filenames not supported"); #endif } else { /* short filenames */ - typed->name = bb_xstrndup(ar.formated.name, 16); + typed->name = xstrndup(ar.formatted.name, 16); } typed->name[strcspn(typed->name, " /")] = '\0'; @@ -112,7 +101,7 @@ extern char get_header_ar(archive_handle_t *archive_handle) archive_handle->action_data(archive_handle); } } else { - data_skip(archive_handle); + data_skip(archive_handle); } archive_handle->offset += typed->size; @@ -121,4 +110,3 @@ extern char get_header_ar(archive_handle_t *archive_handle) return(EXIT_SUCCESS); } -