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-rw-r--r--tune/tune.c166
1 files changed, 166 insertions, 0 deletions
diff --git a/tune/tune.c b/tune/tune.c
new file mode 100644
index 0000000..f883556
--- /dev/null
+++ b/tune/tune.c
@@ -0,0 +1,166 @@
+// 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;
+ 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':
+ ui.volume_serial = strtoul(optarg, NULL, 0);
+ 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) {
+ free(bs);
+ 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;
+}