mirror of
https://github.com/transmission/transmission
synced 2024-12-23 08:13:27 +00:00
535 lines
11 KiB
C++
535 lines
11 KiB
C++
// This file Copyright © Mnemosyne LLC.
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// It may be used under GPLv2 (SPDX: GPL-2.0-only), GPLv3 (SPDX: GPL-3.0-only),
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// or any future license endorsed by Mnemosyne LLC.
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// License text can be found in the licenses/ folder.
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#include <algorithm>
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#include <cerrno>
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#include <string>
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#include <string_view>
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#include <event2/util.h> /* evutil_ascii_strcasecmp() */
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#ifndef _WIN32
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#include <unistd.h> /* getuid() */
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#include <sys/types.h> /* types needed by quota.h */
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#if defined(__FreeBSD__) || defined(__OpenBSD__)
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#include <ufs/ufs/quota.h> /* quotactl() */
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#elif defined(__DragonFly__)
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#include <vfs/ufs/quota.h> /* quotactl */
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#elif defined(__NetBSD__)
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#include <sys/param.h>
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#ifndef statfs
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#define statfs statvfs
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#endif
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#elif defined(__sun)
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#include <sys/fs/ufs_quota.h> /* quotactl */
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#else
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#include <sys/quota.h> /* quotactl() */
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#endif
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#ifdef HAVE_GETMNTENT
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#ifdef __sun
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#include <fcntl.h>
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#include <stdio.h>
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#include <sys/mntent.h>
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#include <sys/mnttab.h>
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#define _PATH_MOUNTED MNTTAB
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#else
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#include <mntent.h>
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#include <paths.h> /* _PATH_MOUNTED */
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#endif
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#else /* BSD derived systems */
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#include <sys/param.h>
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#include <sys/ucred.h>
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#include <sys/mount.h>
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#endif
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#endif
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#ifdef __APPLE__
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#ifndef HAVE_SYS_STATVFS_H
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#define HAVE_SYS_STATVFS_H
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#endif
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#ifndef HAVE_STATVFS
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#define HAVE_STATVFS
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#endif
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#endif
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#ifdef HAVE_SYS_STATVFS_H
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#include <sys/statvfs.h>
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#endif
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#ifdef HAVE_XFS_XFS_H
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#define HAVE_XQM
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#include <xfs/xqm.h>
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#endif
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#include "libtransmission/transmission.h"
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#include "libtransmission/error.h"
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#include "libtransmission/file.h"
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#include "libtransmission/tr-macros.h"
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#include "libtransmission/utils.h"
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namespace
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{
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struct tr_device_info
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{
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std::string path;
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std::string device;
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std::string fstype;
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};
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#ifndef _WIN32
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[[nodiscard]] char const* getdev(std::string_view path)
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{
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#ifdef HAVE_GETMNTENT
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#ifdef __sun
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FILE* const fp = fopen(_PATH_MOUNTED, "r");
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if (fp == nullptr)
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{
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return nullptr;
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}
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struct mnttab mnt;
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while (getmntent(fp, &mnt) != -1)
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{
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if (mnt.mnt_mountp != nullptr && path == mnt.mnt_mountp)
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{
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break;
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}
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}
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fclose(fp);
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return mnt.mnt_special;
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#else
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FILE* const fp = setmntent(_PATH_MOUNTED, "r");
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if (fp == nullptr)
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{
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return nullptr;
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}
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struct mntent const* mnt = nullptr;
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while ((mnt = getmntent(fp)) != nullptr)
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{
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if (mnt->mnt_dir != nullptr && path == mnt->mnt_dir)
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{
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break;
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}
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}
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endmntent(fp);
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return mnt != nullptr ? mnt->mnt_fsname : nullptr;
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#endif
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#else /* BSD derived systems */
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struct statfs* mnt = nullptr;
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int const n = getmntinfo(&mnt, MNT_WAIT);
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if (n == 0)
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{
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return nullptr;
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}
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for (int i = 0; i < n; i++)
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{
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if (path == mnt[i].f_mntonname)
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{
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return mnt[i].f_mntfromname;
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}
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}
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return nullptr;
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#endif
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}
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[[nodiscard]] char const* getfstype(std::string_view device)
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{
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#ifdef HAVE_GETMNTENT
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#ifdef __sun
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FILE* const fp = fopen(_PATH_MOUNTED, "r");
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if (fp == nullptr)
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{
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return nullptr;
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}
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struct mnttab mnt;
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while (getmntent(fp, &mnt) != -1)
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{
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if (device == mnt.mnt_mountp)
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{
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break;
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}
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}
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fclose(fp);
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return mnt.mnt_fstype;
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#else
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FILE* const fp = setmntent(_PATH_MOUNTED, "r");
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if (fp == nullptr)
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{
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return nullptr;
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}
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struct mntent const* mnt = nullptr;
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while ((mnt = getmntent(fp)) != nullptr)
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{
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if (device == mnt->mnt_fsname)
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{
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break;
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}
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}
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endmntent(fp);
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return mnt != nullptr ? mnt->mnt_type : nullptr;
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#endif
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#else /* BSD derived systems */
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struct statfs* mnt = nullptr;
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int const n = getmntinfo(&mnt, MNT_WAIT);
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if (n == 0)
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{
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return nullptr;
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}
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for (int i = 0; i < n; i++)
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{
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if (device == mnt[i].f_mntfromname)
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{
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return mnt[i].f_fstypename;
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}
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}
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return nullptr;
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#endif
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}
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std::string getblkdev(std::string_view path)
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{
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for (;;)
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{
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if (auto const* const device = getdev(path); device != nullptr)
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{
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return device;
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}
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auto const pos = path.rfind('/');
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if (pos == std::string_view::npos)
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{
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return {};
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}
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path = path.substr(0, pos);
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}
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}
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#if defined(__NetBSD__) && __NetBSD_Version__ >= 600000000
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extern "C"
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{
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#include <quota.h>
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}
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[[nodiscard]] tr_sys_path_capacity getquota(char const* device)
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{
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struct quotahandle* qh;
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struct quotakey qk;
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struct quotaval qv;
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struct tr_sys_path_capacity disk_space = { -1, -1 };
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qh = quota_open(device);
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if (qh == nullptr)
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{
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return disk_space;
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}
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qk.qk_idtype = QUOTA_IDTYPE_USER;
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qk.qk_id = getuid();
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qk.qk_objtype = QUOTA_OBJTYPE_BLOCKS;
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if (quota_get(qh, &qk, &qv) == -1)
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{
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quota_close(qh);
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return disk_space;
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}
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int64_t limit;
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if (qv.qv_softlimit > 0)
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{
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limit = qv.qv_softlimit;
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}
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else if (qv.qv_hardlimit > 0)
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{
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limit = qv.qv_hardlimit;
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}
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else
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{
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quota_close(qh);
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return disk_space;
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}
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int64_t const spaceused = qv.qv_usage;
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quota_close(qh);
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int64_t const freespace = limit - spaceused;
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disk_space.free = freespace < 0 ? 0 : freespace;
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disk_space.total = limit;
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return disk_space;
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}
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#else
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[[nodiscard]] tr_sys_path_capacity getquota(char const* device)
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{
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#if defined(__DragonFly__)
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struct ufs_dqblk dq = {};
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#else
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struct dqblk dq = {};
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#endif
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auto disk_space = tr_sys_path_capacity{ -1, -1 };
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#if defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) || defined(__APPLE__)
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if (quotactl(device, QCMD(Q_GETQUOTA, USRQUOTA), getuid(), (caddr_t)&dq) != 0)
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{
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return disk_space;
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}
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#elif defined(__sun)
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struct quotctl op;
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int fd = open(device, O_RDONLY);
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if (fd < 0)
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{
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return disk_space;
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}
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op.op = Q_GETQUOTA;
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op.uid = getuid();
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op.addr = (caddr_t)&dq;
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if (ioctl(fd, Q_QUOTACTL, &op) != 0)
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{
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close(fd);
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return disk_space;
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}
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close(fd);
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#else
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if (quotactl(QCMD(Q_GETQUOTA, USRQUOTA), device, getuid(), reinterpret_cast<caddr_t>(&dq)) != 0)
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{
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return disk_space;
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}
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#endif
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int64_t limit = 0;
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if (dq.dqb_bsoftlimit > 0)
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{
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/* Use soft limit first */
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limit = dq.dqb_bsoftlimit;
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}
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else if (dq.dqb_bhardlimit > 0)
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{
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limit = dq.dqb_bhardlimit;
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}
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else
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{
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/* No quota enabled for this user */
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return disk_space;
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}
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#if defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
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int64_t const spaceused = (int64_t)dq.dqb_curblocks >> 1;
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#elif defined(__APPLE__)
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int64_t const spaceused = (int64_t)dq.dqb_curbytes;
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#elif defined(__UCLIBC__) && !TR_UCLIBC_CHECK_VERSION(1, 0, 18)
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int64_t const spaceused = (int64_t)btodb(dq.dqb_curblocks);
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#elif defined(__sun) || (defined(_LINUX_QUOTA_VERSION) && _LINUX_QUOTA_VERSION < 2)
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int64_t const spaceused = (int64_t)dq.dqb_curblocks >> 1;
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#else
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int64_t const spaceused = btodb(dq.dqb_curspace);
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#endif
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int64_t const freespace = limit - spaceused;
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#ifdef __APPLE__
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disk_space.free = std::max(int64_t{ 0 }, freespace);
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disk_space.total = std::max(int64_t{ 0 }, limit);
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return disk_space;
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#else
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disk_space.free = std::max(int64_t{ 0 }, freespace * 1024);
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disk_space.total = std::max(int64_t{ 0 }, limit * 1024);
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return disk_space;
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#endif
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}
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#endif
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#ifdef HAVE_XQM
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[[nodiscard]] tr_sys_path_capacity getxfsquota(char const* device)
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{
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struct tr_sys_path_capacity disk_space = { -1, -1 };
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struct fs_disk_quota dq;
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if (quotactl(QCMD(Q_XGETQUOTA, USRQUOTA), device, getuid(), (caddr_t)&dq) == 0)
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{
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int64_t limit = 0;
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if (dq.d_blk_softlimit > 0)
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{
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/* Use soft limit first */
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limit = dq.d_blk_softlimit >> 1;
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}
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else if (dq.d_blk_hardlimit > 0)
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{
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limit = dq.d_blk_hardlimit >> 1;
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}
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else
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{
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/* No quota enabled for this user */
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return disk_space;
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}
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int64_t freespace = limit - (dq.d_bcount >> 1);
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freespace = freespace < 0 ? 0 : (freespace * 1024);
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limit = limit * 1024;
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disk_space.free = freespace;
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disk_space.total = limit;
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return disk_space;
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}
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/* something went wrong */
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return disk_space;
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}
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#endif /* HAVE_XQM */
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#endif /* _WIN32 */
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[[nodiscard]] tr_sys_path_capacity get_quota_space([[maybe_unused]] tr_device_info const& info)
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{
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struct tr_sys_path_capacity ret = { -1, -1 };
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#ifndef _WIN32
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if (evutil_ascii_strcasecmp(info.fstype.c_str(), "xfs") == 0)
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{
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#ifdef HAVE_XQM
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ret = getxfsquota(info.device.c_str());
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#endif
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}
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else
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{
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ret = getquota(info.device.c_str());
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}
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#endif /* _WIN32 */
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return ret;
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}
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[[nodiscard]] tr_sys_path_capacity getDiskSpace(char const* path)
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{
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#ifdef _WIN32
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struct tr_sys_path_capacity ret = { -1, -1 };
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if (auto const wide_path = tr_win32_utf8_to_native(path); !std::empty(wide_path))
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{
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ULARGE_INTEGER freeBytesAvailable;
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ULARGE_INTEGER totalBytesAvailable;
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if (GetDiskFreeSpaceExW(wide_path.c_str(), &freeBytesAvailable, &totalBytesAvailable, nullptr))
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{
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ret.free = freeBytesAvailable.QuadPart;
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ret.total = totalBytesAvailable.QuadPart;
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}
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}
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return ret;
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#elif defined(HAVE_STATVFS)
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struct statvfs buf = {};
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return statvfs(path, &buf) != 0 ? (struct tr_sys_path_capacity){ -1, -1 } :
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(struct tr_sys_path_capacity){ (int64_t)buf.f_bavail * (int64_t)buf.f_frsize,
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(int64_t)buf.f_blocks * (int64_t)buf.f_frsize };
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#else
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#warning FIXME: not implemented
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return { -1, -1 };
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#endif
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}
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tr_device_info tr_device_info_create(std::string_view path)
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{
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auto out = tr_device_info{};
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out.path = path;
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#ifndef _WIN32
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out.device = getblkdev(out.path);
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auto const* const fstype = getfstype(out.path);
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out.fstype = fstype != nullptr ? fstype : "";
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#endif
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return out;
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}
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tr_sys_path_capacity tr_device_info_get_disk_space(struct tr_device_info const& info)
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{
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if (std::empty(info.path))
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{
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errno = EINVAL;
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return { -1, -1 };
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}
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auto space = get_quota_space(info);
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if (space.free < 0 || space.total < 0)
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{
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space = getDiskSpace(info.path.c_str());
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}
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return space;
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}
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} // namespace
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std::optional<tr_sys_path_capacity> tr_sys_path_get_capacity(std::string_view path, tr_error** error)
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{
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auto const info = tr_sys_path_get_info(path, 0, error);
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if (!info)
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{
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return {};
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}
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if (!info->isFolder())
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{
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tr_error_set_from_errno(error, ENOTDIR);
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return {};
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}
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auto const device = tr_device_info_create(path);
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auto capacity = tr_device_info_get_disk_space(device);
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if (capacity.free < 0 || capacity.total < 0)
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{
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tr_error_set_from_errno(error, EINVAL);
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return {};
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}
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return capacity;
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}
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