diff options
Diffstat (limited to 'src/VBox/Main/src-helper-apps/VBoxVolInfo.cpp')
-rw-r--r-- | src/VBox/Main/src-helper-apps/VBoxVolInfo.cpp | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/src/VBox/Main/src-helper-apps/VBoxVolInfo.cpp b/src/VBox/Main/src-helper-apps/VBoxVolInfo.cpp new file mode 100644 index 00000000..ff976b83 --- /dev/null +++ b/src/VBox/Main/src-helper-apps/VBoxVolInfo.cpp @@ -0,0 +1,107 @@ +/* $Id: VBoxVolInfo.cpp $ */ +/** @file + * Apps - VBoxVolInfo, Volume information tool. + */ + +/* + * Copyright (C) 2012-2023 Oracle and/or its affiliates. + * + * This file is part of VirtualBox base platform packages, as + * available from https://www.virtualbox.org. + * + * 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, in version 3 of the + * License. + * + * 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 <https://www.gnu.org/licenses>. + * + * SPDX-License-Identifier: GPL-3.0-only + */ + + + +/********************************************************************************************************************************* +* Header Files * +*********************************************************************************************************************************/ +#include <dirent.h> +extern "C" +{ +#define private privatekw +#include <libdevmapper.h> +} +#include <stdio.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <unistd.h> + + +/********************************************************************************************************************************* +* Function Prototypes * +*********************************************************************************************************************************/ +void print_dev_name(dev_t devid); + +/* + * Extracts logical volume dependencies via devmapper API and print them out. + */ +int main(int argc, char **argv) +{ + struct dm_task *dmtask; + struct dm_info dminfo; + + if (argc != 2) + { + fprintf(stderr, "USAGE: %s <volume_name>\n", argv[0]); + return 1; + } + + dmtask = dm_task_create(DM_DEVICE_DEPS); + if (!dmtask) + return 2; + + if (dm_task_set_name(dmtask, argv[1])) + if (dm_task_run(dmtask)) + if (dm_task_get_info(dmtask, &dminfo)) + { + struct dm_deps *dmdeps = dm_task_get_deps(dmtask); + if (dmdeps) + { + unsigned i; + for (i = 0; i < dmdeps->count; ++i) + print_dev_name(dmdeps->device[i]); + } + } + + dm_task_destroy(dmtask); + return 0; +} + +/* + * Looks up device name by id using /dev directory. Prints it to stdout. + */ +void print_dev_name(dev_t devid) +{ + char path[PATH_MAX]; + struct dirent *de; + DIR *dir = opendir("/dev"); + + while ((de = readdir(dir)) != NULL) + { + struct stat st; + snprintf(path, sizeof(path), "/dev/%s", de->d_name); + if (!stat(path, &st)) + if (S_ISBLK(st.st_mode)) + if (devid == st.st_rdev) + { + puts(de->d_name); + break; + } + } + closedir(dir); +} |