diff options
Diffstat (limited to 'src/libs/3rdparty/libarchive/archive_write_set_format_ustar.c')
| -rw-r--r-- | src/libs/3rdparty/libarchive/archive_write_set_format_ustar.c | 758 |
1 files changed, 758 insertions, 0 deletions
diff --git a/src/libs/3rdparty/libarchive/archive_write_set_format_ustar.c b/src/libs/3rdparty/libarchive/archive_write_set_format_ustar.c new file mode 100644 index 000000000..d1a06bc4f --- /dev/null +++ b/src/libs/3rdparty/libarchive/archive_write_set_format_ustar.c @@ -0,0 +1,758 @@ +/*- + * Copyright (c) 2003-2007 Tim Kientzle + * 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_ustar.c 191579 2009-04-27 18:35:03Z kientzle $"); + + +#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 ustar { + uint64_t entry_bytes_remaining; + uint64_t entry_padding; + + struct archive_string_conv *opt_sconv; + struct archive_string_conv *sconv_default; + int init_default_conversion; +}; + +/* + * Define structure of POSIX 'ustar' tar header. + */ +#define USTAR_name_offset 0 +#define USTAR_name_size 100 +#define USTAR_mode_offset 100 +#define USTAR_mode_size 6 +#define USTAR_mode_max_size 8 +#define USTAR_uid_offset 108 +#define USTAR_uid_size 6 +#define USTAR_uid_max_size 8 +#define USTAR_gid_offset 116 +#define USTAR_gid_size 6 +#define USTAR_gid_max_size 8 +#define USTAR_size_offset 124 +#define USTAR_size_size 11 +#define USTAR_size_max_size 12 +#define USTAR_mtime_offset 136 +#define USTAR_mtime_size 11 +#define USTAR_mtime_max_size 11 +#define USTAR_checksum_offset 148 +#define USTAR_checksum_size 8 +#define USTAR_typeflag_offset 156 +#define USTAR_typeflag_size 1 +#define USTAR_linkname_offset 157 +#define USTAR_linkname_size 100 +#define USTAR_magic_offset 257 +#define USTAR_magic_size 6 +#define USTAR_version_offset 263 +#define USTAR_version_size 2 +#define USTAR_uname_offset 265 +#define USTAR_uname_size 32 +#define USTAR_gname_offset 297 +#define USTAR_gname_size 32 +#define USTAR_rdevmajor_offset 329 +#define USTAR_rdevmajor_size 6 +#define USTAR_rdevmajor_max_size 8 +#define USTAR_rdevminor_offset 337 +#define USTAR_rdevminor_size 6 +#define USTAR_rdevminor_max_size 8 +#define USTAR_prefix_offset 345 +#define USTAR_prefix_size 155 +#define USTAR_padding_offset 500 +#define USTAR_padding_size 12 + +/* + * 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, space-null termination: 8 bytes */ + '0','0','0','0','0','0', ' ','\0', + /* uid, space-null termination: 8 bytes */ + '0','0','0','0','0','0', ' ','\0', + /* gid, space-null termination: 8 bytes */ + '0','0','0','0','0','0', ' ','\0', + /* size, space termination: 12 bytes */ + '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', ' ', + /* 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: 6 bytes, Version: 2 bytes */ + 'u','s','t','a','r','\0', '0','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 + space/null padding: 8 bytes */ + '0','0','0','0','0','0', ' ','\0', + /* rdevminor + space/null padding: 8 bytes */ + '0','0','0','0','0','0', ' ','\0', + /* Prefix: 155 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, + /* Padding: 12 bytes */ + 0,0,0,0,0,0,0,0, 0,0,0,0 +}; + +static ssize_t archive_write_ustar_data(struct archive_write *a, const void *buff, + size_t s); +static int archive_write_ustar_free(struct archive_write *); +static int archive_write_ustar_close(struct archive_write *); +static int archive_write_ustar_finish_entry(struct archive_write *); +static int archive_write_ustar_header(struct archive_write *, + struct archive_entry *entry); +static int archive_write_ustar_options(struct archive_write *, + const char *, const char *); +static int format_256(int64_t, char *, int); +static int format_number(int64_t, char *, int size, int max, int strict); +static int format_octal(int64_t, char *, int); + +/* + * Set output format to 'ustar' format. + */ +int +archive_write_set_format_ustar(struct archive *_a) +{ + struct archive_write *a = (struct archive_write *)_a; + struct ustar *ustar; + + archive_check_magic(_a, ARCHIVE_WRITE_MAGIC, + ARCHIVE_STATE_NEW, "archive_write_set_format_ustar"); + + /* If someone else was already registered, unregister them. */ + if (a->format_free != NULL) + (a->format_free)(a); + + /* Basic internal sanity test. */ + if (sizeof(template_header) != 512) { + archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, + "Internal: template_header wrong size: %zu should be 512", + sizeof(template_header)); + return (ARCHIVE_FATAL); + } + + ustar = (struct ustar *)calloc(1, sizeof(*ustar)); + if (ustar == NULL) { + archive_set_error(&a->archive, ENOMEM, + "Can't allocate ustar data"); + return (ARCHIVE_FATAL); + } + a->format_data = ustar; + a->format_name = "ustar"; + a->format_options = archive_write_ustar_options; + a->format_write_header = archive_write_ustar_header; + a->format_write_data = archive_write_ustar_data; + a->format_close = archive_write_ustar_close; + a->format_free = archive_write_ustar_free; + a->format_finish_entry = archive_write_ustar_finish_entry; + a->archive.archive_format = ARCHIVE_FORMAT_TAR_USTAR; + a->archive.archive_format_name = "POSIX ustar"; + return (ARCHIVE_OK); +} + +static int +archive_write_ustar_options(struct archive_write *a, const char *key, + const char *val) +{ + struct ustar *ustar = (struct ustar *)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 { + ustar->opt_sconv = archive_string_conversion_to_charset( + &a->archive, val, 0); + if (ustar->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_ustar_header(struct archive_write *a, struct archive_entry *entry) +{ + char buff[512]; + int ret, ret2; + struct ustar *ustar; + struct archive_entry *entry_main; + struct archive_string_conv *sconv; + + ustar = (struct ustar *)a->format_data; + + /* Setup default string conversion. */ + if (ustar->opt_sconv == NULL) { + if (!ustar->init_default_conversion) { + ustar->sconv_default = + archive_string_default_conversion_for_write(&(a->archive)); + ustar->init_default_conversion = 1; + } + sconv = ustar->sconv_default; + } else + sconv = ustar->opt_sconv; + + /* Sanity check. */ + if (archive_entry_pathname(entry) == NULL) { + archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, + "Can't record entry in tar file without pathname"); + return (ARCHIVE_FAILED); + } + + /* 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 + ret = __archive_write_format_header_ustar(a, buff, entry, -1, 1, sconv); + if (ret < ARCHIVE_WARN) { + archive_entry_free(entry_main); + return (ret); + } + ret2 = __archive_write_output(a, buff, 512); + if (ret2 < ARCHIVE_WARN) { + archive_entry_free(entry_main); + return (ret2); + } + if (ret2 < ret) + ret = ret2; + + ustar->entry_bytes_remaining = archive_entry_size(entry); + ustar->entry_padding = 0x1ff & (-(int64_t)ustar->entry_bytes_remaining); + archive_entry_free(entry_main); + return (ret); +} + +/* + * Format a basic 512-byte "ustar" header. + * + * Returns -1 if format failed (due to field overflow). + * Note that this always formats as much of the header as possible. + * If "strict" is set to zero, it will extend numeric fields as + * necessary (overwriting terminators or using base-256 extensions). + * + * This is exported so that other 'tar' formats can use it. + */ +int +__archive_write_format_header_ustar(struct archive_write *a, char h[512], + struct archive_entry *entry, int tartype, int strict, + struct archive_string_conv *sconv) +{ + unsigned int checksum; + int i, r, ret; + size_t copy_length; + const char *p, *pp; + int mytartype; + + ret = 0; + mytartype = -1; + /* + * The "template header" already includes the "ustar" + * 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. + */ + r = archive_entry_pathname_l(entry, &pp, ©_length, sconv); + if (r != 0) { + if (errno == ENOMEM) { + archive_set_error(&a->archive, ENOMEM, + "Can't allocate memory for Pathname"); + return (ARCHIVE_FATAL); + } + archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, + "Can't translate pathname '%s' to %s", + pp, archive_string_conversion_charset_name(sconv)); + ret = ARCHIVE_WARN; + } + if (copy_length <= USTAR_name_size) + memcpy(h + USTAR_name_offset, pp, copy_length); + else { + /* Store in two pieces, splitting at a '/'. */ + p = strchr(pp + copy_length - USTAR_name_size - 1, '/'); + /* + * Look for the next '/' if we chose the first character + * as the separator. (ustar format doesn't permit + * an empty prefix.) + */ + if (p == pp) + p = strchr(p + 1, '/'); + /* Fail if the name won't fit. */ + if (!p) { + /* No separator. */ + archive_set_error(&a->archive, ENAMETOOLONG, + "Pathname too long"); + ret = ARCHIVE_FAILED; + } else if (p[1] == '\0') { + /* + * The only feasible separator is a final '/'; + * this would result in a non-empty prefix and + * an empty name, which POSIX doesn't + * explicitly forbid, but it just feels wrong. + */ + archive_set_error(&a->archive, ENAMETOOLONG, + "Pathname too long"); + ret = ARCHIVE_FAILED; + } else if (p > pp + USTAR_prefix_size) { + /* Prefix is too long. */ + archive_set_error(&a->archive, ENAMETOOLONG, + "Pathname too long"); + ret = ARCHIVE_FAILED; + } else { + /* Copy prefix and remainder to appropriate places */ + memcpy(h + USTAR_prefix_offset, pp, p - pp); + memcpy(h + USTAR_name_offset, p + 1, + pp + copy_length - p - 1); + } + } + + r = archive_entry_hardlink_l(entry, &p, ©_length, sconv); + if (r != 0) { + if (errno == ENOMEM) { + archive_set_error(&a->archive, ENOMEM, + "Can't allocate memory for Linkname"); + return (ARCHIVE_FATAL); + } + archive_set_error(&a->archive, + ARCHIVE_ERRNO_FILE_FORMAT, + "Can't translate linkname '%s' to %s", + p, archive_string_conversion_charset_name(sconv)); + ret = ARCHIVE_WARN; + } + if (copy_length > 0) + mytartype = '1'; + else { + r = archive_entry_symlink_l(entry, &p, ©_length, sconv); + if (r != 0) { + if (errno == ENOMEM) { + archive_set_error(&a->archive, ENOMEM, + "Can't allocate memory for Linkname"); + return (ARCHIVE_FATAL); + } + archive_set_error(&a->archive, + ARCHIVE_ERRNO_FILE_FORMAT, + "Can't translate linkname '%s' to %s", + p, archive_string_conversion_charset_name(sconv)); + ret = ARCHIVE_WARN; + } + } + if (copy_length > 0) { + if (copy_length > USTAR_linkname_size) { + archive_set_error(&a->archive, ENAMETOOLONG, + "Link contents too long"); + ret = ARCHIVE_FAILED; + copy_length = USTAR_linkname_size; + } + memcpy(h + USTAR_linkname_offset, p, copy_length); + } + + r = archive_entry_uname_l(entry, &p, ©_length, sconv); + if (r != 0) { + if (errno == ENOMEM) { + archive_set_error(&a->archive, ENOMEM, + "Can't allocate memory for Uname"); + return (ARCHIVE_FATAL); + } + archive_set_error(&a->archive, + ARCHIVE_ERRNO_FILE_FORMAT, + "Can't translate uname '%s' to %s", + p, archive_string_conversion_charset_name(sconv)); + ret = ARCHIVE_WARN; + } + if (copy_length > 0) { + if (copy_length > USTAR_uname_size) { + if (tartype != 'x') { + archive_set_error(&a->archive, + ARCHIVE_ERRNO_MISC, "Username too long"); + ret = ARCHIVE_FAILED; + } + copy_length = USTAR_uname_size; + } + memcpy(h + USTAR_uname_offset, p, copy_length); + } + + r = archive_entry_gname_l(entry, &p, ©_length, sconv); + if (r != 0) { + if (errno == ENOMEM) { + archive_set_error(&a->archive, ENOMEM, + "Can't allocate memory for Gname"); + return (ARCHIVE_FATAL); + } + archive_set_error(&a->archive, + ARCHIVE_ERRNO_FILE_FORMAT, + "Can't translate gname '%s' to %s", + p, archive_string_conversion_charset_name(sconv)); + ret = ARCHIVE_WARN; + } + if (copy_length > 0) { + if (strlen(p) > USTAR_gname_size) { + if (tartype != 'x') { + archive_set_error(&a->archive, + ARCHIVE_ERRNO_MISC, "Group name too long"); + ret = ARCHIVE_FAILED; + } + copy_length = USTAR_gname_size; + } + memcpy(h + USTAR_gname_offset, p, copy_length); + } + + if (format_number(archive_entry_mode(entry) & 07777, + h + USTAR_mode_offset, USTAR_mode_size, USTAR_mode_max_size, strict)) { + archive_set_error(&a->archive, ERANGE, + "Numeric mode too large"); + ret = ARCHIVE_FAILED; + } + + if (format_number(archive_entry_uid(entry), + h + USTAR_uid_offset, USTAR_uid_size, USTAR_uid_max_size, strict)) { + archive_set_error(&a->archive, ERANGE, + "Numeric user ID too large"); + ret = ARCHIVE_FAILED; + } + + if (format_number(archive_entry_gid(entry), + h + USTAR_gid_offset, USTAR_gid_size, USTAR_gid_max_size, strict)) { + archive_set_error(&a->archive, ERANGE, + "Numeric group ID too large"); + ret = ARCHIVE_FAILED; + } + + if (format_number(archive_entry_size(entry), + h + USTAR_size_offset, USTAR_size_size, USTAR_size_max_size, strict)) { + archive_set_error(&a->archive, ERANGE, + "File size out of range"); + ret = ARCHIVE_FAILED; + } + + if (format_number(archive_entry_mtime(entry), + h + USTAR_mtime_offset, USTAR_mtime_size, USTAR_mtime_max_size, strict)) { + archive_set_error(&a->archive, ERANGE, + "File modification time too large"); + ret = ARCHIVE_FAILED; + } + + if (archive_entry_filetype(entry) == AE_IFBLK + || archive_entry_filetype(entry) == AE_IFCHR) { + if (format_number(archive_entry_rdevmajor(entry), + h + USTAR_rdevmajor_offset, USTAR_rdevmajor_size, + USTAR_rdevmajor_max_size, strict)) { + archive_set_error(&a->archive, ERANGE, + "Major device number too large"); + ret = ARCHIVE_FAILED; + } + + if (format_number(archive_entry_rdevminor(entry), + h + USTAR_rdevminor_offset, USTAR_rdevminor_size, + USTAR_rdevminor_max_size, strict)) { + archive_set_error(&a->archive, ERANGE, + "Minor device number too large"); + ret = ARCHIVE_FAILED; + } + } + + if (tartype >= 0) { + h[USTAR_typeflag_offset] = tartype; + } else if (mytartype >= 0) { + h[USTAR_typeflag_offset] = mytartype; + } else { + switch (archive_entry_filetype(entry)) { + case AE_IFREG: h[USTAR_typeflag_offset] = '0' ; break; + case AE_IFLNK: h[USTAR_typeflag_offset] = '2' ; break; + case AE_IFCHR: h[USTAR_typeflag_offset] = '3' ; break; + case AE_IFBLK: h[USTAR_typeflag_offset] = '4' ; break; + case AE_IFDIR: h[USTAR_typeflag_offset] = '5' ; break; + case AE_IFIFO: h[USTAR_typeflag_offset] = '6' ; break; + default: /* AE_IFSOCK and unknown */ + __archive_write_entry_filetype_unsupported( + &a->archive, entry, "ustar"); + ret = ARCHIVE_FAILED; + } + } + + checksum = 0; + for (i = 0; i < 512; i++) + checksum += 255 & (unsigned int)h[i]; + h[USTAR_checksum_offset + 6] = '\0'; /* Can't be pre-set in the template. */ + /* h[USTAR_checksum_offset + 7] = ' '; */ /* This is pre-set in the template. */ + format_octal(checksum, h + USTAR_checksum_offset, 6); + return (ret); +} + +/* + * Format a number into a field, with some intelligence. + */ +static int +format_number(int64_t v, char *p, int s, int maxsize, int strict) +{ + int64_t limit; + + limit = ((int64_t)1 << (s*3)); + + /* "Strict" only permits octal values with proper termination. */ + if (strict) + return (format_octal(v, p, s)); + + /* + * In non-strict mode, we allow the number to overwrite one or + * more bytes of the field termination. Even old tar + * implementations should be able to handle this with no + * problem. + */ + if (v >= 0) { + while (s <= maxsize) { + if (v < limit) + return (format_octal(v, p, s)); + s++; + limit <<= 3; + } + } + + /* Base-256 can handle any number, positive or negative. */ + 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. + */ +static int +format_octal(int64_t v, char *p, int s) +{ + int len; + + len = s; + + /* Octal values can't be negative, so use 0. */ + if (v < 0) { + while (len-- > 0) + *p++ = '0'; + return (-1); + } + + 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); +} + +static int +archive_write_ustar_close(struct archive_write *a) +{ + return (__archive_write_nulls(a, 512*2)); +} + +static int +archive_write_ustar_free(struct archive_write *a) +{ + struct ustar *ustar; + + ustar = (struct ustar *)a->format_data; + free(ustar); + a->format_data = NULL; + return (ARCHIVE_OK); +} + +static int +archive_write_ustar_finish_entry(struct archive_write *a) +{ + struct ustar *ustar; + int ret; + + ustar = (struct ustar *)a->format_data; + ret = __archive_write_nulls(a, + (size_t)(ustar->entry_bytes_remaining + ustar->entry_padding)); + ustar->entry_bytes_remaining = ustar->entry_padding = 0; + return (ret); +} + +static ssize_t +archive_write_ustar_data(struct archive_write *a, const void *buff, size_t s) +{ + struct ustar *ustar; + int ret; + + ustar = (struct ustar *)a->format_data; + if (s > ustar->entry_bytes_remaining) + s = (size_t)ustar->entry_bytes_remaining; + ret = __archive_write_output(a, buff, s); + ustar->entry_bytes_remaining -= s; + if (ret != ARCHIVE_OK) + return (ret); + return (s); +} |