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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2019 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: tune.exfat\n");
fprintf(stderr, "\t-l | --print-label Print volume label\n");
fprintf(stderr, "\t-L | --set-label=label Set volume label\n");
fprintf(stderr, "\t-u | --print-guid Print volume GUID\n");
fprintf(stderr, "\t-U | --set-guid=guid Set volume GUID\n");
fprintf(stderr, "\t-i | --print-serial Print volume serial\n");
fprintf(stderr, "\t-I | --set-serial=value Set volume serial\n");
fprintf(stderr, "\t-V | --version Show version\n");
fprintf(stderr, "\t-v | --verbose Print debug\n");
fprintf(stderr, "\t-h | --help Show help\n");
exit(EXIT_FAILURE);
}
static struct option opts[] = {
{"print-label", no_argument, NULL, 'l' },
{"set-label", required_argument, NULL, 'L' },
{"print-guid", no_argument, NULL, 'u' },
{"set-guid", required_argument, NULL, 'U' },
{"print-serial", no_argument, NULL, 'i' },
{"set-serial", required_argument, NULL, 'I' },
{"version", no_argument, NULL, 'V' },
{"verbose", 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;
unsigned long volume_serial;
struct exfat_blk_dev bd;
struct exfat_user_input ui;
bool version_only = false;
int flags = 0;
char label_input[VOLUME_LABEL_BUFFER_SIZE];
struct exfat *exfat = NULL;
struct pbr *bs;
init_user_input(&ui);
if (!setlocale(LC_CTYPE, ""))
exfat_err("failed to init locale/codeset\n");
opterr = 0;
while ((c = getopt_long(argc, argv, "I:iL:lU:uVvh", opts, NULL)) != EOF)
switch (c) {
case 'l':
flags = EXFAT_GET_VOLUME_LABEL;
break;
case 'L':
snprintf(label_input, sizeof(label_input), "%s",
optarg);
flags = EXFAT_SET_VOLUME_LABEL;
break;
case 'u':
flags = EXFAT_GET_VOLUME_GUID;
break;
case 'U':
if (*optarg != '\0' && *optarg != '\r')
ui.guid = optarg;
flags = EXFAT_SET_VOLUME_GUID;
break;
case 'i':
flags = EXFAT_GET_VOLUME_SERIAL;
break;
case 'I':
ret = exfat_parse_ulong(optarg, &volume_serial);
if (volume_serial > UINT_MAX)
ret = -ERANGE;
if (ret < 0) {
exfat_err("invalid serial number(%s)\n", optarg);
goto out;
}
ui.volume_serial = volume_serial;
flags = EXFAT_SET_VOLUME_SERIAL;
break;
case 'V':
version_only = true;
break;
case 'v':
print_level = EXFAT_DEBUG;
break;
case '?':
case 'h':
default:
usage();
}
show_version();
if (version_only)
exit(EXIT_FAILURE);
if (argc < 3)
usage();
memset(ui.dev_name, 0, sizeof(ui.dev_name));
snprintf(ui.dev_name, sizeof(ui.dev_name), "%s", argv[argc - 1]);
ret = exfat_get_blk_dev_info(&ui, &bd);
if (ret < 0)
goto out;
/* Mode to change or display volume serial */
if (flags == EXFAT_GET_VOLUME_SERIAL) {
ret = exfat_show_volume_serial(bd.dev_fd);
goto close_fd_out;
} else if (flags == EXFAT_SET_VOLUME_SERIAL) {
ret = exfat_set_volume_serial(&bd, &ui);
goto close_fd_out;
}
ret = read_boot_sect(&bd, &bs);
if (ret)
goto close_fd_out;
exfat = exfat_alloc_exfat(&bd, bs);
if (!exfat) {
ret = -ENOMEM;
goto close_fd_out;
}
exfat->root = exfat_alloc_inode(ATTR_SUBDIR);
if (!exfat->root) {
ret = -ENOMEM;
goto close_fd_out;
}
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 close_fd_out;
}
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, label_input);
else if (flags == EXFAT_GET_VOLUME_GUID)
ret = exfat_read_volume_guid(exfat);
else if (flags == EXFAT_SET_VOLUME_GUID)
ret = exfat_set_volume_guid(exfat, ui.guid);
close_fd_out:
close(bd.dev_fd);
if (exfat)
exfat_free_exfat(exfat);
out:
return ret;
}
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