diff options
Diffstat (limited to 'src/libs/3rdparty/libarchive/archive_write_set_format_gnutar.c')
| -rw-r--r-- | src/libs/3rdparty/libarchive/archive_write_set_format_gnutar.c | 755 |
1 files changed, 755 insertions, 0 deletions
diff --git a/src/libs/3rdparty/libarchive/archive_write_set_format_gnutar.c b/src/libs/3rdparty/libarchive/archive_write_set_format_gnutar.c new file mode 100644 index 000000000..ec29c5c41 --- /dev/null +++ b/src/libs/3rdparty/libarchive/archive_write_set_format_gnutar.c @@ -0,0 +1,755 @@ +/*- + * 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" +#include "archive_write_set_format_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[0] != '\0' && 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'); + archive_entry_free(temp); + if (ret < ARCHIVE_WARN) + goto exit_write_header; + ret = __archive_write_output(a, buff, 512); + if (ret < ARCHIVE_WARN) + goto exit_write_header; + /* 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'); + archive_entry_free(temp); + if (ret < ARCHIVE_WARN) + goto exit_write_header; + ret = __archive_write_output(a, buff, 512); + if(ret < ARCHIVE_WARN) + goto exit_write_header; + /* 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; + default: /* AE_IFSOCK and unknown */ + __archive_write_entry_filetype_unsupported( + &a->archive, entry, "gnutar"); + 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: + 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); +} |