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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2020 Namjae Jeon <linkinjeon@kernel.org>
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <getopt.h>
#include <errno.h>
#include <locale.h>
#include "exfat_ondisk.h"
#include "libexfat.h"
#include "exfat_fs.h"
static void usage(void)
{
fprintf(stderr, "Usage: exfatlabel\n");
fprintf(stderr, "\t-i | --volume-serial Switch to volume serial mode\n");
fprintf(stderr, "\t-V | --version Show version\n");
fprintf(stderr, "\t-h | --help Show help\n");
exit(EXIT_FAILURE);
}
static struct option opts[] = {
{"volume-serial", no_argument, NULL, 'i' },
{"version", no_argument, NULL, 'V' },
{"help", no_argument, NULL, 'h' },
{"?", no_argument, NULL, '?' },
{NULL, 0, NULL, 0 }
};
int main(int argc, char *argv[])
{
int c;
int ret = EXIT_FAILURE;
struct exfat_blk_dev bd;
struct exfat_user_input ui;
bool version_only = false;
int serial_mode = 0;
int flags = 0;
init_user_input(&ui);
if (!setlocale(LC_CTYPE, ""))
exfat_err("failed to init locale/codeset\n");
if (argc == 2)
flags = EXFAT_GET_VOLUME_LABEL;
else if (argc == 3)
flags = EXFAT_SET_VOLUME_LABEL;
opterr = 0;
while ((c = getopt_long(argc, argv, "iVh", opts, NULL)) != EOF)
switch (c) {
case 'i':
serial_mode = true;
if (argc == 3)
flags = EXFAT_GET_VOLUME_SERIAL;
else if (argc == 4)
flags = EXFAT_SET_VOLUME_SERIAL;
break;
case 'V':
version_only = true;
break;
case '?':
case 'h':
default:
usage();
}
show_version();
if (version_only)
exit(EXIT_FAILURE);
if (argc < 2)
usage();
memset(ui.dev_name, 0, sizeof(ui.dev_name));
snprintf(ui.dev_name, sizeof(ui.dev_name), "%s", argv[serial_mode + 1]);
ret = exfat_get_blk_dev_info(&ui, &bd);
if (ret < 0)
goto out;
if (serial_mode) {
/* Mode to change or display volume serial */
if (flags == EXFAT_GET_VOLUME_SERIAL) {
ret = exfat_show_volume_serial(bd.dev_fd);
} else if (flags == EXFAT_SET_VOLUME_SERIAL) {
ui.volume_serial = strtoul(argv[3], NULL, 0);
ret = exfat_set_volume_serial(&bd, &ui);
}
} else {
struct exfat *exfat;
struct pbr *bs;
ret = read_boot_sect(&bd, &bs);
if (ret)
goto close_fd_out;
exfat = exfat_alloc_exfat(&bd, bs);
if (!exfat) {
free(bs);
ret = -ENOMEM;
goto close_fd_out;
}
exfat->root = exfat_alloc_inode(ATTR_SUBDIR);
if (!exfat->root) {
ret = -ENOMEM;
goto free_exfat;
}
exfat->root->first_clus = le32_to_cpu(exfat->bs->bsx.root_cluster);
if (exfat_root_clus_count(exfat)) {
exfat_err("failed to follow the cluster chain of root\n");
exfat_free_inode(exfat->root);
ret = -EINVAL;
goto free_exfat;
}
/* Mode to change or display volume label */
if (flags == EXFAT_GET_VOLUME_LABEL)
ret = exfat_read_volume_label(exfat);
else if (flags == EXFAT_SET_VOLUME_LABEL)
ret = exfat_set_volume_label(exfat, argv[2]);
free_exfat:
if (exfat)
exfat_free_exfat(exfat);
}
close_fd_out:
close(bd.dev_fd);
out:
return ret;
}
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