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/*
* Copyright (C) 2023 Patrick McDermott
*
* This file is part of opkg-opk.
*
* opkg-opk 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 3 of the License, or
* (at your option) any later version.
*
* opkg-opk 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with opkg-opk. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include "defs.h"
#include "gzip.h"
#include "ustar.h"
struct _opkg_opk_ustar_header {
unsigned char name [100];
unsigned char mode [8];
unsigned char uid [8];
unsigned char gid [8];
unsigned char size [12];
unsigned char mtime [12];
unsigned char chksum [8];
unsigned char typeflag [1];
unsigned char linkname [100];
unsigned char magic [6];
unsigned char version [2];
unsigned char uname [32];
unsigned char gname [32];
unsigned char devmajor [8];
unsigned char devminor [8];
unsigned char prefix [155];
unsigned char padding [12];
} __attribute__((__packed__));
static int
_opkg_opk_ustar_next(struct opkg_opk_gzip_state *gzip_state, const char *member,
struct _opkg_opk_ustar_header *header, unsigned char **contents)
{
static unsigned char record[512];
int ret;
char *size_end;
uint32_t size;
unsigned char *contents_cursor;
uint32_t i;
switch ((ret = opkg_opk_gzip_next_record(gzip_state, header))) {
case OPKG_OPK_OK:
case OPKG_OPK_END:
break;
case OPKG_OPK_ERROR:
return OPKG_OPK_ERROR;
}
size = strtol(header->size, &size_end, 10);
if (*size_end != '\0') {
return OPKG_OPK_ERROR;
}
for (i = 0; i < (size + 511) / 512; ++i) {
switch ((ret = opkg_opk_gzip_next_record(gzip_state, record))) {
case OPKG_OPK_OK:
case OPKG_OPK_END:
break;
case OPKG_OPK_ERROR:
return OPKG_OPK_ERROR;
}
}
return ret;
}
unsigned char *
opkg_opk_ustar_read(struct opkg_opk_gzip_state *gzip_state, const char *member)
{
struct _opkg_opk_ustar_header header;
int ret;
unsigned char *contents;
while ((ret = _opkg_opk_ustar_next(gzip_state, member,
&header, &contents)) == OPKG_OPK_OK) {
/* TODO: End gzip stream */
return contents;
}
return NULL;
}
int
opkg_opk_ustar_list(struct opkg_opk_gzip_state *gzip_state,
void (*member)(const char *name))
{
struct _opkg_opk_ustar_header header;
int ret;
while ((ret = _opkg_opk_ustar_next(gzip_state, NULL, &header, NULL)) ==
OPKG_OPK_OK) {
printf("%s\n", header.name);
}
return ret;
}
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