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/*
* Copyright (C) 2020 Red Hat, Inc.
*
* This program 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.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*
* Author: Vojtech Trefny <vtrefny@redhat.com>
*
* This is just a small helper program for (V)FAT filesystem resizing using libparted.
* We don't want this to be part of the library because libparted is licensed under GPLv3
* and we want to keep libblockdev LGPL compatible.
*
*/
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <glib.h>
#include <parted/parted.h>
#include <bytesize/bs_size.h>
void print_usage (const char *cmd) {
g_print ("Usage: %s device [size]\n"
"-h --help Print this usage info\n"
"If size is not specified the file system is adapted to the underlying block device\n",
cmd);
}
PedExceptionOption bd_exc_handler (PedException *ex) {
if (ex->type <= PED_EXCEPTION_WARNING && (ex->options & PED_EXCEPTION_IGNORE) != 0) {
g_print ("[parted] %s\n", ex->message);
return PED_EXCEPTION_IGNORE;
}
g_printerr ("[parted] %s\n",ex->message);
return PED_EXCEPTION_UNHANDLED;
}
int main (int argc, char *argv[]) {
PedDevice *ped_dev = NULL;
PedGeometry geom = {0};
PedGeometry new_geom = {0};
PedFileSystem *fs = NULL;
PedSector start = 0;
PedSector length = 0;
gint status = 0;
guint64 new_size = 0;
BSSize bs_size;
BSError *bs_error = NULL;
gchar *device = NULL;
if (argc < 2 || g_strcmp0 (argv[1], "-h") == 0 || g_strcmp0 (argv[1], "--help") == 0) {
print_usage (argv[0]);
return 0;
}
if (argc == 3) {
device = argv[1];
bs_size = bs_size_new_from_str (argv[2], &bs_error);
if (bs_size) {
new_size = bs_size_get_bytes (bs_size, NULL, &bs_error);
bs_size_free (bs_size);
}
if (bs_error) {
g_printerr ("Failed to parse size from '%s': '%s'\n", argv[2], bs_error->msg);
bs_clear_error (&bs_error);
return 1;
}
} else
device = argv[1];
ped_exception_set_handler ((PedExceptionHandler*) bd_exc_handler);
ped_dev = ped_device_get (device);
if (!ped_dev) {
g_printerr ("Failed to get ped device for the device '%s'\n", device);
return 1;
}
status = ped_device_open (ped_dev);
if (status == 0) {
g_printerr ("Failed to get open the device '%s'\n", device);
return 1;
}
status = ped_geometry_init (&geom, ped_dev, start, ped_dev->length);
if (status == 0) {
g_printerr ("Failed to initialize geometry for the device '%s'\n", device);
ped_device_close (ped_dev);
return 1;
}
fs = ped_file_system_open (&geom);
if (!fs) {
g_printerr ("Failed to read the filesystem on the device '%s'\n", device);
ped_device_close (ped_dev);
return 1;
}
if (new_size == 0)
length = ped_dev->length;
else
length = (PedSector) ((PedSector) new_size / ped_dev->sector_size);
status = ped_geometry_init (&new_geom, ped_dev, start, length);
if (status == 0) {
g_printerr ("Failed to initialize new geometry for the filesystem on '%s'\n", device);
ped_file_system_close (fs);
ped_device_close (ped_dev);
return 1;
}
status = ped_file_system_resize (fs, &new_geom, NULL);
if (status == 0) {
g_printerr ("Failed to resize the filesystem on '%s'\n", device);
ped_file_system_close (fs);
ped_device_close (ped_dev);
return 1;
}
ped_file_system_close (fs);
ped_device_close (ped_dev);
return 0;
}
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