| /*- |
| * Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies). |
| * Author: Jonas Gastal <jgastal@profusion.mobi> |
| * Copyright (c) 2011-2012 Michihiro NAKAJIMA |
| * |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "archive_platform.h" |
| __FBSDID("$FreeBSD: head/lib/libarchive/archive_write_set_format_gnu_tar.c 191579 2009-04-27 18:35:03Z gastal $"); |
| |
| |
| #ifdef HAVE_ERRNO_H |
| #include <errno.h> |
| #endif |
| #include <stdio.h> |
| #ifdef HAVE_STDLIB_H |
| #include <stdlib.h> |
| #endif |
| #ifdef HAVE_STRING_H |
| #include <string.h> |
| #endif |
| |
| #include "archive.h" |
| #include "archive_entry.h" |
| #include "archive_entry_locale.h" |
| #include "archive_private.h" |
| #include "archive_write_private.h" |
| |
| struct gnutar { |
| uint64_t entry_bytes_remaining; |
| uint64_t entry_padding; |
| const char * linkname; |
| size_t linkname_length; |
| const char * pathname; |
| size_t pathname_length; |
| const char * uname; |
| size_t uname_length; |
| const char * gname; |
| size_t gname_length; |
| struct archive_string_conv *opt_sconv; |
| struct archive_string_conv *sconv_default; |
| int init_default_conversion; |
| }; |
| |
| /* |
| * Define structure of GNU tar header. |
| */ |
| #define GNUTAR_name_offset 0 |
| #define GNUTAR_name_size 100 |
| #define GNUTAR_mode_offset 100 |
| #define GNUTAR_mode_size 7 |
| #define GNUTAR_mode_max_size 8 |
| #define GNUTAR_uid_offset 108 |
| #define GNUTAR_uid_size 7 |
| #define GNUTAR_uid_max_size 8 |
| #define GNUTAR_gid_offset 116 |
| #define GNUTAR_gid_size 7 |
| #define GNUTAR_gid_max_size 8 |
| #define GNUTAR_size_offset 124 |
| #define GNUTAR_size_size 11 |
| #define GNUTAR_size_max_size 12 |
| #define GNUTAR_mtime_offset 136 |
| #define GNUTAR_mtime_size 11 |
| #define GNUTAR_mtime_max_size 11 |
| #define GNUTAR_checksum_offset 148 |
| #define GNUTAR_checksum_size 8 |
| #define GNUTAR_typeflag_offset 156 |
| #define GNUTAR_typeflag_size 1 |
| #define GNUTAR_linkname_offset 157 |
| #define GNUTAR_linkname_size 100 |
| #define GNUTAR_magic_offset 257 |
| #define GNUTAR_magic_size 6 |
| #define GNUTAR_version_offset 263 |
| #define GNUTAR_version_size 2 |
| #define GNUTAR_uname_offset 265 |
| #define GNUTAR_uname_size 32 |
| #define GNUTAR_gname_offset 297 |
| #define GNUTAR_gname_size 32 |
| #define GNUTAR_rdevmajor_offset 329 |
| #define GNUTAR_rdevmajor_size 6 |
| #define GNUTAR_rdevmajor_max_size 8 |
| #define GNUTAR_rdevminor_offset 337 |
| #define GNUTAR_rdevminor_size 6 |
| #define GNUTAR_rdevminor_max_size 8 |
| |
| /* |
| * A filled-in copy of the header for initialization. |
| */ |
| static const char template_header[] = { |
| /* name: 100 bytes */ |
| 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, |
| 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, |
| 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, |
| 0,0,0,0, |
| /* Mode, null termination: 8 bytes */ |
| '0','0','0','0','0','0', '0','\0', |
| /* uid, null termination: 8 bytes */ |
| '0','0','0','0','0','0', '0','\0', |
| /* gid, null termination: 8 bytes */ |
| '0','0','0','0','0','0', '0','\0', |
| /* size, space termination: 12 bytes */ |
| '0','0','0','0','0','0','0','0','0','0','0', '\0', |
| /* mtime, space termination: 12 bytes */ |
| '0','0','0','0','0','0','0','0','0','0','0', '\0', |
| /* Initial checksum value: 8 spaces */ |
| ' ',' ',' ',' ',' ',' ',' ',' ', |
| /* Typeflag: 1 byte */ |
| '0', /* '0' = regular file */ |
| /* Linkname: 100 bytes */ |
| 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, |
| 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, |
| 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, |
| 0,0,0,0, |
| /* Magic: 8 bytes */ |
| 'u','s','t','a','r',' ', ' ','\0', |
| /* Uname: 32 bytes */ |
| 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, |
| /* Gname: 32 bytes */ |
| 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, |
| /* rdevmajor + null padding: 8 bytes */ |
| '\0','\0','\0','\0','\0','\0', '\0','\0', |
| /* rdevminor + null padding: 8 bytes */ |
| '\0','\0','\0','\0','\0','\0', '\0','\0', |
| /* Padding: 167 bytes */ |
| 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, |
| 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, |
| 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, |
| 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, |
| 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, |
| 0,0,0,0,0,0,0 |
| }; |
| |
| static int archive_write_gnutar_options(struct archive_write *, |
| const char *, const char *); |
| static int archive_format_gnutar_header(struct archive_write *, char h[512], |
| struct archive_entry *, int tartype); |
| static int archive_write_gnutar_header(struct archive_write *, |
| struct archive_entry *entry); |
| static ssize_t archive_write_gnutar_data(struct archive_write *a, const void *buff, |
| size_t s); |
| static int archive_write_gnutar_free(struct archive_write *); |
| static int archive_write_gnutar_close(struct archive_write *); |
| static int archive_write_gnutar_finish_entry(struct archive_write *); |
| static int format_256(int64_t, char *, int); |
| static int format_number(int64_t, char *, int size, int maxsize); |
| static int format_octal(int64_t, char *, int); |
| |
| /* |
| * Set output format to 'GNU tar' format. |
| */ |
| int |
| archive_write_set_format_gnutar(struct archive *_a) |
| { |
| struct archive_write *a = (struct archive_write *)_a; |
| struct gnutar *gnutar; |
| |
| gnutar = (struct gnutar *)calloc(1, sizeof(*gnutar)); |
| if (gnutar == NULL) { |
| archive_set_error(&a->archive, ENOMEM, |
| "Can't allocate gnutar data"); |
| return (ARCHIVE_FATAL); |
| } |
| a->format_data = gnutar; |
| a->format_name = "gnutar"; |
| a->format_options = archive_write_gnutar_options; |
| a->format_write_header = archive_write_gnutar_header; |
| a->format_write_data = archive_write_gnutar_data; |
| a->format_close = archive_write_gnutar_close; |
| a->format_free = archive_write_gnutar_free; |
| a->format_finish_entry = archive_write_gnutar_finish_entry; |
| a->archive.archive_format = ARCHIVE_FORMAT_TAR_GNUTAR; |
| a->archive.archive_format_name = "GNU tar"; |
| return (ARCHIVE_OK); |
| } |
| |
| static int |
| archive_write_gnutar_options(struct archive_write *a, const char *key, |
| const char *val) |
| { |
| struct gnutar *gnutar = (struct gnutar *)a->format_data; |
| int ret = ARCHIVE_FAILED; |
| |
| if (strcmp(key, "hdrcharset") == 0) { |
| if (val == NULL || val[0] == 0) |
| archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, |
| "%s: hdrcharset option needs a character-set name", |
| a->format_name); |
| else { |
| gnutar->opt_sconv = archive_string_conversion_to_charset( |
| &a->archive, val, 0); |
| if (gnutar->opt_sconv != NULL) |
| ret = ARCHIVE_OK; |
| else |
| ret = ARCHIVE_FATAL; |
| } |
| return (ret); |
| } |
| |
| /* Note: The "warn" return is just to inform the options |
| * supervisor that we didn't handle it. It will generate |
| * a suitable error if no one used this option. */ |
| return (ARCHIVE_WARN); |
| } |
| |
| static int |
| archive_write_gnutar_close(struct archive_write *a) |
| { |
| return (__archive_write_nulls(a, 512*2)); |
| } |
| |
| static int |
| archive_write_gnutar_free(struct archive_write *a) |
| { |
| struct gnutar *gnutar; |
| |
| gnutar = (struct gnutar *)a->format_data; |
| free(gnutar); |
| a->format_data = NULL; |
| return (ARCHIVE_OK); |
| } |
| |
| static int |
| archive_write_gnutar_finish_entry(struct archive_write *a) |
| { |
| struct gnutar *gnutar; |
| int ret; |
| |
| gnutar = (struct gnutar *)a->format_data; |
| ret = __archive_write_nulls(a, (size_t) |
| (gnutar->entry_bytes_remaining + gnutar->entry_padding)); |
| gnutar->entry_bytes_remaining = gnutar->entry_padding = 0; |
| return (ret); |
| } |
| |
| static ssize_t |
| archive_write_gnutar_data(struct archive_write *a, const void *buff, size_t s) |
| { |
| struct gnutar *gnutar; |
| int ret; |
| |
| gnutar = (struct gnutar *)a->format_data; |
| if (s > gnutar->entry_bytes_remaining) |
| s = (size_t)gnutar->entry_bytes_remaining; |
| ret = __archive_write_output(a, buff, s); |
| gnutar->entry_bytes_remaining -= s; |
| if (ret != ARCHIVE_OK) |
| return (ret); |
| return (s); |
| } |
| |
| static int |
| archive_write_gnutar_header(struct archive_write *a, |
| struct archive_entry *entry) |
| { |
| char buff[512]; |
| int r, ret, ret2 = ARCHIVE_OK; |
| int tartype; |
| struct gnutar *gnutar; |
| struct archive_string_conv *sconv; |
| struct archive_entry *entry_main; |
| |
| gnutar = (struct gnutar *)a->format_data; |
| |
| /* Setup default string conversion. */ |
| if (gnutar->opt_sconv == NULL) { |
| if (!gnutar->init_default_conversion) { |
| gnutar->sconv_default = |
| archive_string_default_conversion_for_write( |
| &(a->archive)); |
| gnutar->init_default_conversion = 1; |
| } |
| sconv = gnutar->sconv_default; |
| } else |
| sconv = gnutar->opt_sconv; |
| |
| /* Only regular files (not hardlinks) have data. */ |
| if (archive_entry_hardlink(entry) != NULL || |
| archive_entry_symlink(entry) != NULL || |
| !(archive_entry_filetype(entry) == AE_IFREG)) |
| archive_entry_set_size(entry, 0); |
| |
| if (AE_IFDIR == archive_entry_filetype(entry)) { |
| const char *p; |
| size_t path_length; |
| /* |
| * Ensure a trailing '/'. Modify the entry so |
| * the client sees the change. |
| */ |
| #if defined(_WIN32) && !defined(__CYGWIN__) |
| const wchar_t *wp; |
| |
| wp = archive_entry_pathname_w(entry); |
| if (wp != NULL && wp[wcslen(wp) -1] != L'/') { |
| struct archive_wstring ws; |
| |
| archive_string_init(&ws); |
| path_length = wcslen(wp); |
| if (archive_wstring_ensure(&ws, |
| path_length + 2) == NULL) { |
| archive_set_error(&a->archive, ENOMEM, |
| "Can't allocate ustar data"); |
| archive_wstring_free(&ws); |
| return(ARCHIVE_FATAL); |
| } |
| /* Should we keep '\' ? */ |
| if (wp[path_length -1] == L'\\') |
| path_length--; |
| archive_wstrncpy(&ws, wp, path_length); |
| archive_wstrappend_wchar(&ws, L'/'); |
| archive_entry_copy_pathname_w(entry, ws.s); |
| archive_wstring_free(&ws); |
| p = NULL; |
| } else |
| #endif |
| p = archive_entry_pathname(entry); |
| /* |
| * On Windows, this is a backup operation just in |
| * case getting WCS failed. On POSIX, this is a |
| * normal operation. |
| */ |
| if (p != NULL && p[strlen(p) - 1] != '/') { |
| struct archive_string as; |
| |
| archive_string_init(&as); |
| path_length = strlen(p); |
| if (archive_string_ensure(&as, |
| path_length + 2) == NULL) { |
| archive_set_error(&a->archive, ENOMEM, |
| "Can't allocate ustar data"); |
| archive_string_free(&as); |
| return(ARCHIVE_FATAL); |
| } |
| #if defined(_WIN32) && !defined(__CYGWIN__) |
| /* NOTE: This might break the pathname |
| * if the current code page is CP932 and |
| * the pathname includes a character '\' |
| * as a part of its multibyte pathname. */ |
| if (p[strlen(p) -1] == '\\') |
| path_length--; |
| else |
| #endif |
| archive_strncpy(&as, p, path_length); |
| archive_strappend_char(&as, '/'); |
| archive_entry_copy_pathname(entry, as.s); |
| archive_string_free(&as); |
| } |
| } |
| |
| #if defined(_WIN32) && !defined(__CYGWIN__) |
| /* Make sure the path separators in pathname, hardlink and symlink |
| * are all slash '/', not the Windows path separator '\'. */ |
| entry_main = __la_win_entry_in_posix_pathseparator(entry); |
| if (entry_main == NULL) { |
| archive_set_error(&a->archive, ENOMEM, |
| "Can't allocate ustar data"); |
| return(ARCHIVE_FATAL); |
| } |
| if (entry != entry_main) |
| entry = entry_main; |
| else |
| entry_main = NULL; |
| #else |
| entry_main = NULL; |
| #endif |
| r = archive_entry_pathname_l(entry, &(gnutar->pathname), |
| &(gnutar->pathname_length), sconv); |
| if (r != 0) { |
| if (errno == ENOMEM) { |
| archive_set_error(&a->archive, ENOMEM, |
| "Can't allocate memory for Pathame"); |
| ret = ARCHIVE_FATAL; |
| goto exit_write_header; |
| } |
| archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, |
| "Can't translate pathname '%s' to %s", |
| archive_entry_pathname(entry), |
| archive_string_conversion_charset_name(sconv)); |
| ret2 = ARCHIVE_WARN; |
| } |
| r = archive_entry_uname_l(entry, &(gnutar->uname), |
| &(gnutar->uname_length), sconv); |
| if (r != 0) { |
| if (errno == ENOMEM) { |
| archive_set_error(&a->archive, ENOMEM, |
| "Can't allocate memory for Uname"); |
| ret = ARCHIVE_FATAL; |
| goto exit_write_header; |
| } |
| archive_set_error(&a->archive, |
| ARCHIVE_ERRNO_FILE_FORMAT, |
| "Can't translate uname '%s' to %s", |
| archive_entry_uname(entry), |
| archive_string_conversion_charset_name(sconv)); |
| ret2 = ARCHIVE_WARN; |
| } |
| r = archive_entry_gname_l(entry, &(gnutar->gname), |
| &(gnutar->gname_length), sconv); |
| if (r != 0) { |
| if (errno == ENOMEM) { |
| archive_set_error(&a->archive, ENOMEM, |
| "Can't allocate memory for Gname"); |
| ret = ARCHIVE_FATAL; |
| goto exit_write_header; |
| } |
| archive_set_error(&a->archive, |
| ARCHIVE_ERRNO_FILE_FORMAT, |
| "Can't translate gname '%s' to %s", |
| archive_entry_gname(entry), |
| archive_string_conversion_charset_name(sconv)); |
| ret2 = ARCHIVE_WARN; |
| } |
| |
| /* If linkname is longer than 100 chars we need to add a 'K' header. */ |
| r = archive_entry_hardlink_l(entry, &(gnutar->linkname), |
| &(gnutar->linkname_length), sconv); |
| if (r != 0) { |
| if (errno == ENOMEM) { |
| archive_set_error(&a->archive, ENOMEM, |
| "Can't allocate memory for Linkname"); |
| ret = ARCHIVE_FATAL; |
| goto exit_write_header; |
| } |
| archive_set_error(&a->archive, |
| ARCHIVE_ERRNO_FILE_FORMAT, |
| "Can't translate linkname '%s' to %s", |
| archive_entry_hardlink(entry), |
| archive_string_conversion_charset_name(sconv)); |
| ret2 = ARCHIVE_WARN; |
| } |
| if (gnutar->linkname_length == 0) { |
| r = archive_entry_symlink_l(entry, &(gnutar->linkname), |
| &(gnutar->linkname_length), sconv); |
| if (r != 0) { |
| if (errno == ENOMEM) { |
| archive_set_error(&a->archive, ENOMEM, |
| "Can't allocate memory for Linkname"); |
| ret = ARCHIVE_FATAL; |
| goto exit_write_header; |
| } |
| archive_set_error(&a->archive, |
| ARCHIVE_ERRNO_FILE_FORMAT, |
| "Can't translate linkname '%s' to %s", |
| archive_entry_hardlink(entry), |
| archive_string_conversion_charset_name(sconv)); |
| ret2 = ARCHIVE_WARN; |
| } |
| } |
| if (gnutar->linkname_length > GNUTAR_linkname_size) { |
| size_t length = gnutar->linkname_length + 1; |
| struct archive_entry *temp = archive_entry_new2(&a->archive); |
| |
| /* Uname/gname here don't really matter since no one reads them; |
| * these are the values that GNU tar happens to use on FreeBSD. */ |
| archive_entry_set_uname(temp, "root"); |
| archive_entry_set_gname(temp, "wheel"); |
| |
| archive_entry_set_pathname(temp, "././@LongLink"); |
| archive_entry_set_size(temp, length); |
| ret = archive_format_gnutar_header(a, buff, temp, 'K'); |
| if (ret < ARCHIVE_WARN) |
| goto exit_write_header; |
| ret = __archive_write_output(a, buff, 512); |
| if(ret < ARCHIVE_WARN) |
| goto exit_write_header; |
| archive_entry_free(temp); |
| /* Write name and trailing null byte. */ |
| ret = __archive_write_output(a, gnutar->linkname, length); |
| if(ret < ARCHIVE_WARN) |
| goto exit_write_header; |
| /* Pad to 512 bytes */ |
| ret = __archive_write_nulls(a, 0x1ff & (-(ssize_t)length)); |
| if (ret < ARCHIVE_WARN) |
| goto exit_write_header; |
| } |
| |
| /* If pathname is longer than 100 chars we need to add an 'L' header. */ |
| if (gnutar->pathname_length > GNUTAR_name_size) { |
| const char *pathname = gnutar->pathname; |
| size_t length = gnutar->pathname_length + 1; |
| struct archive_entry *temp = archive_entry_new2(&a->archive); |
| |
| /* Uname/gname here don't really matter since no one reads them; |
| * these are the values that GNU tar happens to use on FreeBSD. */ |
| archive_entry_set_uname(temp, "root"); |
| archive_entry_set_gname(temp, "wheel"); |
| |
| archive_entry_set_pathname(temp, "././@LongLink"); |
| archive_entry_set_size(temp, length); |
| ret = archive_format_gnutar_header(a, buff, temp, 'L'); |
| if (ret < ARCHIVE_WARN) |
| goto exit_write_header; |
| ret = __archive_write_output(a, buff, 512); |
| if(ret < ARCHIVE_WARN) |
| goto exit_write_header; |
| archive_entry_free(temp); |
| /* Write pathname + trailing null byte. */ |
| ret = __archive_write_output(a, pathname, length); |
| if(ret < ARCHIVE_WARN) |
| goto exit_write_header; |
| /* Pad to multiple of 512 bytes. */ |
| ret = __archive_write_nulls(a, 0x1ff & (-(ssize_t)length)); |
| if (ret < ARCHIVE_WARN) |
| goto exit_write_header; |
| } |
| |
| if (archive_entry_hardlink(entry) != NULL) { |
| tartype = '1'; |
| } else |
| switch (archive_entry_filetype(entry)) { |
| case AE_IFREG: tartype = '0' ; break; |
| case AE_IFLNK: tartype = '2' ; break; |
| case AE_IFCHR: tartype = '3' ; break; |
| case AE_IFBLK: tartype = '4' ; break; |
| case AE_IFDIR: tartype = '5' ; break; |
| case AE_IFIFO: tartype = '6' ; break; |
| case AE_IFSOCK: |
| archive_set_error(&a->archive, |
| ARCHIVE_ERRNO_FILE_FORMAT, |
| "tar format cannot archive socket"); |
| ret = ARCHIVE_FAILED; |
| goto exit_write_header; |
| default: |
| archive_set_error(&a->archive, |
| ARCHIVE_ERRNO_FILE_FORMAT, |
| "tar format cannot archive this (mode=0%lo)", |
| (unsigned long)archive_entry_mode(entry)); |
| ret = ARCHIVE_FAILED; |
| goto exit_write_header; |
| } |
| |
| ret = archive_format_gnutar_header(a, buff, entry, tartype); |
| if (ret < ARCHIVE_WARN) |
| goto exit_write_header; |
| if (ret2 < ret) |
| ret = ret2; |
| ret2 = __archive_write_output(a, buff, 512); |
| if (ret2 < ARCHIVE_WARN) { |
| ret = ret2; |
| goto exit_write_header; |
| } |
| if (ret2 < ret) |
| ret = ret2; |
| |
| gnutar->entry_bytes_remaining = archive_entry_size(entry); |
| gnutar->entry_padding = 0x1ff & (-(int64_t)gnutar->entry_bytes_remaining); |
| exit_write_header: |
| if (entry_main) |
| archive_entry_free(entry_main); |
| return (ret); |
| } |
| |
| static int |
| archive_format_gnutar_header(struct archive_write *a, char h[512], |
| struct archive_entry *entry, int tartype) |
| { |
| unsigned int checksum; |
| int i, ret; |
| size_t copy_length; |
| const char *p; |
| struct gnutar *gnutar; |
| |
| gnutar = (struct gnutar *)a->format_data; |
| |
| ret = 0; |
| |
| /* |
| * The "template header" already includes the signature, |
| * various end-of-field markers, and other required elements. |
| */ |
| memcpy(h, &template_header, 512); |
| |
| /* |
| * Because the block is already null-filled, and strings |
| * are allowed to exactly fill their destination (without null), |
| * I use memcpy(dest, src, strlen()) here a lot to copy strings. |
| */ |
| |
| if (tartype == 'K' || tartype == 'L') { |
| p = archive_entry_pathname(entry); |
| copy_length = strlen(p); |
| } else { |
| p = gnutar->pathname; |
| copy_length = gnutar->pathname_length; |
| } |
| if (copy_length > GNUTAR_name_size) |
| copy_length = GNUTAR_name_size; |
| memcpy(h + GNUTAR_name_offset, p, copy_length); |
| |
| if ((copy_length = gnutar->linkname_length) > 0) { |
| if (copy_length > GNUTAR_linkname_size) |
| copy_length = GNUTAR_linkname_size; |
| memcpy(h + GNUTAR_linkname_offset, gnutar->linkname, |
| copy_length); |
| } |
| |
| /* TODO: How does GNU tar handle unames longer than GNUTAR_uname_size? */ |
| if (tartype == 'K' || tartype == 'L') { |
| p = archive_entry_uname(entry); |
| copy_length = strlen(p); |
| } else { |
| p = gnutar->uname; |
| copy_length = gnutar->uname_length; |
| } |
| if (copy_length > 0) { |
| if (copy_length > GNUTAR_uname_size) |
| copy_length = GNUTAR_uname_size; |
| memcpy(h + GNUTAR_uname_offset, p, copy_length); |
| } |
| |
| /* TODO: How does GNU tar handle gnames longer than GNUTAR_gname_size? */ |
| if (tartype == 'K' || tartype == 'L') { |
| p = archive_entry_gname(entry); |
| copy_length = strlen(p); |
| } else { |
| p = gnutar->gname; |
| copy_length = gnutar->gname_length; |
| } |
| if (copy_length > 0) { |
| if (strlen(p) > GNUTAR_gname_size) |
| copy_length = GNUTAR_gname_size; |
| memcpy(h + GNUTAR_gname_offset, p, copy_length); |
| } |
| |
| /* By truncating the mode here, we ensure it always fits. */ |
| format_octal(archive_entry_mode(entry) & 07777, |
| h + GNUTAR_mode_offset, GNUTAR_mode_size); |
| |
| /* GNU tar supports base-256 here, so should never overflow. */ |
| if (format_number(archive_entry_uid(entry), h + GNUTAR_uid_offset, |
| GNUTAR_uid_size, GNUTAR_uid_max_size)) { |
| archive_set_error(&a->archive, ERANGE, |
| "Numeric user ID %jd too large", |
| (intmax_t)archive_entry_uid(entry)); |
| ret = ARCHIVE_FAILED; |
| } |
| |
| /* GNU tar supports base-256 here, so should never overflow. */ |
| if (format_number(archive_entry_gid(entry), h + GNUTAR_gid_offset, |
| GNUTAR_gid_size, GNUTAR_gid_max_size)) { |
| archive_set_error(&a->archive, ERANGE, |
| "Numeric group ID %jd too large", |
| (intmax_t)archive_entry_gid(entry)); |
| ret = ARCHIVE_FAILED; |
| } |
| |
| /* GNU tar supports base-256 here, so should never overflow. */ |
| if (format_number(archive_entry_size(entry), h + GNUTAR_size_offset, |
| GNUTAR_size_size, GNUTAR_size_max_size)) { |
| archive_set_error(&a->archive, ERANGE, |
| "File size out of range"); |
| ret = ARCHIVE_FAILED; |
| } |
| |
| /* Shouldn't overflow before 2106, since mtime field is 33 bits. */ |
| format_octal(archive_entry_mtime(entry), |
| h + GNUTAR_mtime_offset, GNUTAR_mtime_size); |
| |
| if (archive_entry_filetype(entry) == AE_IFBLK |
| || archive_entry_filetype(entry) == AE_IFCHR) { |
| if (format_octal(archive_entry_rdevmajor(entry), |
| h + GNUTAR_rdevmajor_offset, |
| GNUTAR_rdevmajor_size)) { |
| archive_set_error(&a->archive, ERANGE, |
| "Major device number too large"); |
| ret = ARCHIVE_FAILED; |
| } |
| |
| if (format_octal(archive_entry_rdevminor(entry), |
| h + GNUTAR_rdevminor_offset, |
| GNUTAR_rdevminor_size)) { |
| archive_set_error(&a->archive, ERANGE, |
| "Minor device number too large"); |
| ret = ARCHIVE_FAILED; |
| } |
| } |
| |
| h[GNUTAR_typeflag_offset] = tartype; |
| |
| checksum = 0; |
| for (i = 0; i < 512; i++) |
| checksum += 255 & (unsigned int)h[i]; |
| h[GNUTAR_checksum_offset + 6] = '\0'; /* Can't be pre-set in the template. */ |
| /* h[GNUTAR_checksum_offset + 7] = ' '; */ /* This is pre-set in the template. */ |
| format_octal(checksum, h + GNUTAR_checksum_offset, 6); |
| return (ret); |
| } |
| |
| /* |
| * Format a number into a field, falling back to base-256 if necessary. |
| */ |
| static int |
| format_number(int64_t v, char *p, int s, int maxsize) |
| { |
| int64_t limit = ((int64_t)1 << (s*3)); |
| |
| if (v < limit) |
| return (format_octal(v, p, s)); |
| return (format_256(v, p, maxsize)); |
| } |
| |
| /* |
| * Format a number into the specified field using base-256. |
| */ |
| static int |
| format_256(int64_t v, char *p, int s) |
| { |
| p += s; |
| while (s-- > 0) { |
| *--p = (char)(v & 0xff); |
| v >>= 8; |
| } |
| *p |= 0x80; /* Set the base-256 marker bit. */ |
| return (0); |
| } |
| |
| /* |
| * Format a number into the specified field using octal. |
| */ |
| static int |
| format_octal(int64_t v, char *p, int s) |
| { |
| int len = s; |
| |
| /* Octal values can't be negative, so use 0. */ |
| if (v < 0) |
| v = 0; |
| |
| p += s; /* Start at the end and work backwards. */ |
| while (s-- > 0) { |
| *--p = (char)('0' + (v & 7)); |
| v >>= 3; |
| } |
| |
| if (v == 0) |
| return (0); |
| |
| /* If it overflowed, fill field with max value. */ |
| while (len-- > 0) |
| *p++ = '7'; |
| |
| return (-1); |
| } |