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/*
* Copyright (C) 2023 Patrick McDermott
*
* This file is part of opkg-opkg.
*
* opkg-opkg 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-opkg 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-opkg. If not, see <http://www.gnu.org/licenses/>.
*/
#include <grp.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "../defs.h"
#include "../dirent.h"
#include "../gzip.h"
#include "../i18n.h"
#include "../opk.h"
#include "../ustar.h"
#include "opk.h"
static int
_opkg_opk_opk_write_file(void *user_data, size_t size)
{
struct opkg_opk_opk *opk = user_data;
if (fwrite(opk->file_buffer, 1, size, opk->file) == size) {
return OPKG_OPK_OK;
} else {
return OPKG_OPK_ERROR;
}
}
static int
_opkg_opk_opk_source_date_epoch(int64_t *mtime)
{
char *env;
char *end;
env = getenv("SOURCE_DATE_EPOCH");
if (env == NULL) {
return OPKG_OPK_ERROR;
}
*mtime = strtol(env, &end, 10);
if (*end != '\0') {
return OPKG_OPK_ERROR;
}
return OPKG_OPK_OK;
}
int
opkg_opk_opk_write(struct opkg_opk_opk *opk, const char *file_name)
{
int ret;
int64_t mtime;
struct opkg_opk_dirent dirent;
char *buffer;
size_t size;
ret = OPKG_OPK_OK;
if (_opkg_opk_opk_source_date_epoch(&mtime) == OPKG_OPK_ERROR) {
fputs(_("Error: Missing or invalid SOURCE_DATE_EPOCH\n"),
stderr);
ret = OPKG_OPK_ERROR;
goto out0;
}
/* Open outer archive. */
opk->file = fopen(file_name, "wb");
if (opk->file == NULL) {
fprintf(stderr, _("Error: Failed to open file \"%s\"\n"),
file_name);
ret = OPKG_OPK_ERROR;
goto out0;
}
/* Initialize outer gzip decompressor. */
opk->outer_gzip = opkg_opk_gzip_init_write(&_opkg_opk_opk_write_file,
opk);
if (opk->outer_gzip == NULL) {
fputs(_("Error: Failed to initialize\n"), stderr);
ret = OPKG_OPK_ERROR;
goto out1;
}
opkg_opk_gzip_set_write_buffer(opk->outer_gzip, opk->file_buffer,
sizeof(opk->file_buffer));
/* Initialize outer ustar unarchiver. */
opk->outer_ustar = opkg_opk_ustar_init(opk->outer_gzip);
if (opk->outer_ustar == NULL) {
fputs(_("Error: Failed to initialize\n"), stderr);
ret = OPKG_OPK_ERROR;
goto out2;
}
/* Write version file. */
dirent.name = "debian-binary";
dirent.parent = NULL;
if (opkg_opk_ustar_write_header(opk->outer_ustar, &dirent, 0644,
0, getpwuid(0)->pw_name,
0, getgrgid(0)->gr_name,
4, mtime, '-', NULL) != OPKG_OPK_OK) {
fputs(_("Error: Failed to write header\n"), stderr);
ret = OPKG_OPK_ERROR;
goto out3;
}
opkg_opk_ustar_get_buffer(opk->outer_ustar, &buffer, &size);
memcpy(buffer, "2.0\n", 4);
if (opkg_opk_ustar_write_data(opk->outer_ustar, 4) != OPKG_OPK_OK) {
fputs(_("Error: Failed to write data\n"), stderr);
ret = OPKG_OPK_ERROR;
goto out3;
}
/* TODO: control.tar.gz and data.tar.gz */
/* Write trailer. */
if (opkg_opk_ustar_write_trailer(opk->outer_ustar) != OPKG_OPK_OK) {
fputs(_("Error: Failed to write trailer\n"), stderr);
ret = OPKG_OPK_ERROR;
goto out3;
}
out3:
opkg_opk_ustar_free(opk->outer_ustar);
out2:
opkg_opk_gzip_free(opk->outer_gzip);
out1:
fclose(opk->file);
out0:
return ret;
}
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