freebsd-dev/lib/libarchive/archive_write_set_format_mtree.c
Tim Kientzle 9ea6421090 New mtree writer, thanks to Joerg Sonnenberger.
Obtained from:	Joerg Sonnenberger
2008-08-31 07:21:46 +00:00

260 lines
6.9 KiB
C

/*-
* Copyright (c) 2008 Joerg Sonnenberger
* 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("$FreeBSD$");
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include "archive.h"
#include "archive_entry.h"
#include "archive_private.h"
#include "archive_write_private.h"
struct mtree_writer {
struct archive_entry *entry;
struct archive_string buf;
int first;
};
static int
mtree_safe_char(char c)
{
if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'))
return 1;
if (c >= '0' && c <= '9')
return 1;
if (c == 35 || c == 61 || c == 92)
return 0; /* #, = and \ are always quoted */
if (c >= 33 && c <= 47) /* !"$%&'()*+,-./ */
return 1;
if (c >= 58 && c <= 64) /* :;<>?@ */
return 1;
if (c >= 91 && c <= 96) /* []^_` */
return 1;
if (c >= 123 && c <= 126) /* {|}~ */
return 1;
return 0;
}
static void
mtree_quote(struct mtree_writer *mtree, const char *str)
{
const char *start;
char buf[4];
unsigned char c;
for (start = str; *str != '\0'; ++str) {
if (mtree_safe_char(*str))
continue;
if (start != str)
archive_strncat(&mtree->buf, start, str - start);
c = (unsigned char)*str;
buf[0] = '\\';
buf[1] = (c / 64) + '0';
buf[2] = (c / 8 % 8) + '0';
buf[3] = (c % 8) + '0';
archive_strncat(&mtree->buf, buf, 4);
start = str + 1;
}
if (start != str)
archive_strncat(&mtree->buf, start, str - start);
}
static int
archive_write_mtree_header(struct archive_write *a,
struct archive_entry *entry)
{
struct mtree_writer *mtree= a->format_data;
const char *path;
mtree->entry = archive_entry_clone(entry);
path = archive_entry_pathname(mtree->entry);
if (mtree->first) {
mtree->first = 0;
archive_strcat(&mtree->buf, "#mtree\n");
}
mtree_quote(mtree, path);
return (ARCHIVE_OK);
}
static int
archive_write_mtree_finish_entry(struct archive_write *a)
{
struct mtree_writer *mtree = a->format_data;
struct archive_entry *entry;
const char *name;
int ret;
entry = mtree->entry;
if (entry == NULL) {
archive_set_error(&a->archive, ARCHIVE_ERRNO_PROGRAMMER,
"Finished entry without being open first.");
return (ARCHIVE_FATAL);
}
mtree->entry = NULL;
if (archive_entry_nlink(entry) != 1 &&
archive_entry_filetype(entry) != AE_IFDIR)
archive_string_sprintf(&mtree->buf,
" nlink=%u", archive_entry_nlink(entry));
if ((name = archive_entry_gname(entry)) != NULL) {
archive_strcat(&mtree->buf, " gname=");
mtree_quote(mtree, name);
}
if ((name = archive_entry_uname(entry)) != NULL) {
archive_strcat(&mtree->buf, " uname=");
mtree_quote(mtree, name);
}
if ((name = archive_entry_fflags_text(entry)) != NULL) {
archive_strcat(&mtree->buf, " flags=");
mtree_quote(mtree, name);
}
archive_string_sprintf(&mtree->buf,
" time=%jd mode=%o gid=%jd uid=%jd",
(intmax_t)archive_entry_mtime(entry),
archive_entry_mode(entry) & 07777,
(intmax_t)archive_entry_gid(entry),
(intmax_t)archive_entry_uid(entry));
switch (archive_entry_filetype(entry)) {
case AE_IFLNK:
archive_strcat(&mtree->buf, " type=link link=");
mtree_quote(mtree, archive_entry_symlink(entry));
archive_strcat(&mtree->buf, "\n");
break;
case AE_IFSOCK:
archive_strcat(&mtree->buf, " type=socket\n");
break;
case AE_IFCHR:
archive_string_sprintf(&mtree->buf,
" type=char device=native,%d,%d\n",
archive_entry_rdevmajor(entry),
archive_entry_rdevminor(entry));
break;
case AE_IFBLK:
archive_string_sprintf(&mtree->buf,
" type=block device=native,%d,%d\n",
archive_entry_rdevmajor(entry),
archive_entry_rdevminor(entry));
break;
case AE_IFDIR:
archive_strcat(&mtree->buf, " type=dir\n");
break;
case AE_IFIFO:
archive_strcat(&mtree->buf, " type=fifo\n");
break;
case AE_IFREG:
default: /* Handle unknown file types as regular files. */
archive_string_sprintf(&mtree->buf, " type=file size=%jd\n",
(intmax_t)archive_entry_size(entry));
break;
}
archive_entry_free(entry);
if (mtree->buf.length > 32768) {
ret = (a->compressor.write)(a, mtree->buf.s, mtree->buf.length);
archive_string_empty(&mtree->buf);
} else
ret = ARCHIVE_OK;
return (ret == ARCHIVE_OK ? ret : ARCHIVE_FATAL);
}
static int
archive_write_mtree_finish(struct archive_write *a)
{
struct mtree_writer *mtree= a->format_data;
archive_write_set_bytes_in_last_block(&a->archive, 1);
return (a->compressor.write)(a, mtree->buf.s, mtree->buf.length);
}
static ssize_t
archive_write_mtree_data(struct archive_write *a, const void *buff, size_t n)
{
(void)a; /* UNUSED */
(void)buff; /* UNUSED */
return n;
}
static int
archive_write_mtree_destroy(struct archive_write *a)
{
struct mtree_writer *mtree= a->format_data;
if (mtree == NULL)
return (ARCHIVE_OK);
archive_entry_free(mtree->entry);
archive_string_free(&mtree->buf);
free(mtree);
a->format_data = NULL;
return (ARCHIVE_OK);
}
int
archive_write_set_format_mtree(struct archive *_a)
{
struct archive_write *a = (struct archive_write *)_a;
struct mtree_writer *mtree;
if (a->format_destroy != NULL)
(a->format_destroy)(a);
if ((mtree = malloc(sizeof(*mtree))) == NULL) {
archive_set_error(&a->archive, ENOMEM,
"Can't allocate mtree data");
return (ARCHIVE_FATAL);
}
mtree->entry = NULL;
mtree->first = 1;
archive_string_init(&mtree->buf);
a->format_data = mtree;
a->format_destroy = archive_write_mtree_destroy;
a->pad_uncompressed = 0;
a->format_write_header = archive_write_mtree_header;
a->format_finish = archive_write_mtree_finish;
a->format_write_data = archive_write_mtree_data;
a->format_finish_entry = archive_write_mtree_finish_entry;
a->archive.archive_format = ARCHIVE_FORMAT_MTREE;
a->archive.archive_format_name = "mtree";
return (ARCHIVE_OK);
}