src/basic/copy.c

	copy.c revision c622fbdb8d37796c35ab1e08240a18b4222e5c9f
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer/***
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer  This file is part of systemd.
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer  Copyright 2014 Lennart Poettering
0d6e798a784ef0ba6b95512e4453067b2f84a91aHarald Hoyer
0d6e798a784ef0ba6b95512e4453067b2f84a91aHarald Hoyer  systemd is free software; you can redistribute it and/or modify it
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer  under the terms of the GNU Lesser General Public License as published by
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier  the Free Software Foundation; either version 2.1 of the License, or
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier  (at your option) any later version.
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier  systemd is distributed in the hope that it will be useful, but
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier  WITHOUT ANY WARRANTY; without even the implied warranty of
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier  Lesser General Public License for more details.
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier  You should have received a copy of the GNU Lesser General Public License
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier  along with systemd; If not, see <http://www.gnu.org/licenses/>.
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier***/
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier#include <sys/sendfile.h>
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier#include <sys/xattr.h>
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier#include "util.h"
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier#include "btrfs-util.h"
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier#include "strv.h"
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier#include "copy.h"
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier#define COPY_BUFFER_SIZE (16*1024)
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalierint copy_bytes(int fdf, int fdt, uint64_t max_bytes, bool try_reflink) {
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier        bool try_sendfile = true, try_splice = true;
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier        int r;
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier        assert(fdf >= 0);
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier        assert(fdt >= 0);
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        /* Try btrfs reflinks first. */
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier        if (try_reflink &&
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier            max_bytes == (uint64_t) -1 &&
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier            lseek(fdf, 0, SEEK_CUR) == 0 &&
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier            lseek(fdt, 0, SEEK_CUR) == 0) {
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier                r = btrfs_reflink(fdf, fdt);
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier                if (r >= 0)
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier                        return r;
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier        }
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier        for (;;) {
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier                size_t m = COPY_BUFFER_SIZE;
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier                ssize_t n;
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier                if (max_bytes != (uint64_t) -1) {
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier                        if (max_bytes <= 0)
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier                                return -EFBIG;
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier                        if ((uint64_t) m > max_bytes)
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier                                m = (size_t) max_bytes;
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier                }
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier                /* First try sendfile(), unless we already tried */
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier                if (try_sendfile) {
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier                        n = sendfile(fdt, fdf, NULL, m);
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier                        if (n < 0) {
c6a77179a4097df355f0f04b8f3260c76b5e515cRonny Chevalier                                if (errno != EINVAL && errno != ENOSYS)
8a8332f77e61d41f3bb28b8f929ed41e0ffaf721Zbigniew Jędrzejewski-Szmek                                        return -errno;
8a8332f77e61d41f3bb28b8f929ed41e0ffaf721Zbigniew Jędrzejewski-Szmek
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                                try_sendfile = false;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                                /* use fallback below */
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                        } else if (n == 0) /* EOF */
8a8332f77e61d41f3bb28b8f929ed41e0ffaf721Zbigniew Jędrzejewski-Szmek                                break;
8a8332f77e61d41f3bb28b8f929ed41e0ffaf721Zbigniew Jędrzejewski-Szmek                        else if (n > 0)
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                                /* Success! */
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                                goto next;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                }
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                /* The try splice, unless we already tried */
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                if (try_splice) {
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                        n  = splice(fdf, NULL, fdt, NULL, m, 0);
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                        if (n < 0) {
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                                if (errno != EINVAL && errno != ENOSYS)
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                                        return -errno;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                                try_splice = false;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                                /* use fallback below */
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                        } else if (n == 0) /* EOF */
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                                break;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                        else if (n > 0)
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                                /* Success! */
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                                goto next;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                }
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                /* As a fallback just copy bits by hand */
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                {
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                        char buf[m];
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                        n = read(fdf, buf, m);
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                        if (n < 0)
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                                return -errno;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                        if (n == 0) /* EOF */
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                                break;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                        r = loop_write(fdt, buf, (size_t) n, false);
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                        if (r < 0)
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                                return r;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                }
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        next:
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                if (max_bytes != (uint64_t) -1) {
8a8332f77e61d41f3bb28b8f929ed41e0ffaf721Zbigniew Jędrzejewski-Szmek                        assert(max_bytes >= (uint64_t) n);
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                        max_bytes -= n;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                }
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        }
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        return 0;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier}
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalierstatic int fd_copy_symlink(int df, const char *from, const struct stat *st, int dt, const char *to) {
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        _cleanup_free_ char *target = NULL;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        int r;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        assert(from);
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        assert(st);
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        assert(to);
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
739d81ddd005fae2bb82edce5b8a6173c7c48b34Zbigniew Jędrzejewski-Szmek        r = readlinkat_malloc(df, from, &target);
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        if (r < 0)
b8667ee4162cd2510363602b417cecede9fd2ccaZbigniew Jędrzejewski-Szmek                return r;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
739d81ddd005fae2bb82edce5b8a6173c7c48b34Zbigniew Jędrzejewski-Szmek        if (symlinkat(target, dt, to) < 0)
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                return -errno;
b8667ee4162cd2510363602b417cecede9fd2ccaZbigniew Jędrzejewski-Szmek
b8667ee4162cd2510363602b417cecede9fd2ccaZbigniew Jędrzejewski-Szmek        if (fchownat(dt, to, st->st_uid, st->st_gid, AT_SYMLINK_NOFOLLOW) < 0)
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                return -errno;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        return 0;
739d81ddd005fae2bb82edce5b8a6173c7c48b34Zbigniew Jędrzejewski-Szmek}
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalierstatic int fd_copy_regular(int df, const char *from, const struct stat *st, int dt, const char *to) {
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        _cleanup_close_ int fdf = -1, fdt = -1;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        struct timespec ts[2];
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        int r, q;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        assert(from);
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        assert(st);
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        assert(to);
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        fdf = openat(df, from, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW);
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        if (fdf < 0)
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                return -errno;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        fdt = openat(dt, to, O_WRONLY|O_CREAT|O_EXCL|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW, st->st_mode & 07777);
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        if (fdt < 0)
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                return -errno;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        r = copy_bytes(fdf, fdt, (uint64_t) -1, true);
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        if (r < 0) {
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                unlinkat(dt, to, 0);
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                return r;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        }
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        if (fchown(fdt, st->st_uid, st->st_gid) < 0)
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                r = -errno;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        if (fchmod(fdt, st->st_mode & 07777) < 0)
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                r = -errno;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        ts[0] = st->st_atim;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        ts[1] = st->st_mtim;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        (void) futimens(fdt, ts);
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        (void) copy_xattr(fdf, fdt);
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        q = close(fdt);
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        fdt = -1;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        if (q < 0) {
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                r = -errno;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                unlinkat(dt, to, 0);
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        }
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        return r;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier}
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalierstatic int fd_copy_fifo(int df, const char *from, const struct stat *st, int dt, const char *to) {
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        int r;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        assert(from);
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        assert(st);
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        assert(to);
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        r = mkfifoat(dt, to, st->st_mode & 07777);
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        if (r < 0)
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                return -errno;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        if (fchownat(dt, to, st->st_uid, st->st_gid, AT_SYMLINK_NOFOLLOW) < 0)
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                r = -errno;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        if (fchmodat(dt, to, st->st_mode & 07777, 0) < 0)
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                r = -errno;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        return r;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier}
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalierstatic int fd_copy_node(int df, const char *from, const struct stat *st, int dt, const char *to) {
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        int r;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        assert(from);
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        assert(st);
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        assert(to);
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        r = mknodat(dt, to, st->st_mode, st->st_rdev);
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        if (r < 0)
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                return -errno;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        if (fchownat(dt, to, st->st_uid, st->st_gid, AT_SYMLINK_NOFOLLOW) < 0)
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                r = -errno;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        if (fchmodat(dt, to, st->st_mode & 07777, 0) < 0)
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                r = -errno;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        return r;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier}
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalierstatic int fd_copy_directory(
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                int df,
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                const char *from,
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                const struct stat *st,
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                int dt,
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                const char *to,
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                dev_t original_device,
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                bool merge) {
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        _cleanup_close_ int fdf = -1, fdt = -1;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        _cleanup_closedir_ DIR *d = NULL;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        struct dirent *de;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        bool created;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        int r;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        assert(st);
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        assert(to);
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        if (from)
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                fdf = openat(df, from, O_RDONLY|O_DIRECTORY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW);
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        else
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                fdf = fcntl(df, F_DUPFD_CLOEXEC, 3);
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        d = fdopendir(fdf);
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        if (!d)
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                return -errno;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        fdf = -1;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        r = mkdirat(dt, to, st->st_mode & 07777);
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        if (r >= 0)
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                created = true;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        else if (errno == EEXIST && merge)
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                created = false;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        else
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                return -errno;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        fdt = openat(dt, to, O_RDONLY|O_DIRECTORY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW);
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        if (fdt < 0)
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                return -errno;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        r = 0;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        if (created) {
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                struct timespec ut[2] = {
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                        st->st_atim,
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                        st->st_mtim
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                };
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                if (fchown(fdt, st->st_uid, st->st_gid) < 0)
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                        r = -errno;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                if (fchmod(fdt, st->st_mode & 07777) < 0)
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                        r = -errno;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                (void) futimens(fdt, ut);
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                (void) copy_xattr(dirfd(d), fdt);
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        }
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        FOREACH_DIRENT_ALL(de, d, return -errno) {
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                struct stat buf;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                int q;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                if (STR_IN_SET(de->d_name, ".", ".."))
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                        continue;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                if (fstatat(dirfd(d), de->d_name, &buf, AT_SYMLINK_NOFOLLOW) < 0) {
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                        r = -errno;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                        continue;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                }
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                if (buf.st_dev != original_device)
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                        continue;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                if (S_ISREG(buf.st_mode))
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                        q = fd_copy_regular(dirfd(d), de->d_name, &buf, fdt, de->d_name);
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                else if (S_ISDIR(buf.st_mode))
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                        q = fd_copy_directory(dirfd(d), de->d_name, &buf, fdt, de->d_name, original_device, merge);
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                else if (S_ISLNK(buf.st_mode))
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                        q = fd_copy_symlink(dirfd(d), de->d_name, &buf, fdt, de->d_name);
0d6e798a784ef0ba6b95512e4453067b2f84a91aHarald Hoyer                else if (S_ISFIFO(buf.st_mode))
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                        q = fd_copy_fifo(dirfd(d), de->d_name, &buf, fdt, de->d_name);
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                else if (S_ISBLK(buf.st_mode) || S_ISCHR(buf.st_mode))
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                        q = fd_copy_node(dirfd(d), de->d_name, &buf, fdt, de->d_name);
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                else
0d6e798a784ef0ba6b95512e4453067b2f84a91aHarald Hoyer                        q = -EOPNOTSUPP;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                if (q == -EEXIST && merge)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        q = 0;
0d6e798a784ef0ba6b95512e4453067b2f84a91aHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                if (q < 0)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        r = q;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        }
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        return r;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer}
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyerint copy_tree_at(int fdf, const char *from, int fdt, const char *to, bool merge) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        struct stat st;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        assert(from);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        assert(to);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (fstatat(fdf, from, &st, AT_SYMLINK_NOFOLLOW) < 0)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                return -errno;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (S_ISREG(st.st_mode))
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                return fd_copy_regular(fdf, from, &st, fdt, to);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        else if (S_ISDIR(st.st_mode))
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                return fd_copy_directory(fdf, from, &st, fdt, to, st.st_dev, merge);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        else if (S_ISLNK(st.st_mode))
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                return fd_copy_symlink(fdf, from, &st, fdt, to);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        else if (S_ISFIFO(st.st_mode))
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                return fd_copy_fifo(fdf, from, &st, fdt, to);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        else if (S_ISBLK(st.st_mode) || S_ISCHR(st.st_mode))
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                return fd_copy_node(fdf, from, &st, fdt, to);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        else
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                return -EOPNOTSUPP;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer}
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyerint copy_tree(const char *from, const char *to, bool merge) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        return copy_tree_at(AT_FDCWD, from, AT_FDCWD, to, merge);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer}
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyerint copy_directory_fd(int dirfd, const char *to, bool merge) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        struct stat st;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        assert(dirfd >= 0);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        assert(to);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (fstat(dirfd, &st) < 0)
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                return -errno;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier        if (!S_ISDIR(st.st_mode))
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier                return -ENOTDIR;
889a90422dd47284dffa32b9234a6e58991b000cRonny Chevalier
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        return fd_copy_directory(dirfd, NULL, &st, AT_FDCWD, to, st.st_dev, merge);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer}
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyerint copy_file_fd(const char *from, int fdt, bool try_reflink) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        _cleanup_close_ int fdf = -1;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        int r;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        assert(from);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        assert(fdt >= 0);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        fdf = open(from, O_RDONLY|O_CLOEXEC|O_NOCTTY);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (fdf < 0)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                return -errno;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        r = copy_bytes(fdf, fdt, (uint64_t) -1, try_reflink);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        (void) copy_times(fdf, fdt);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        (void) copy_xattr(fdf, fdt);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        return r;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer}
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyerint copy_file(const char *from, const char *to, int flags, mode_t mode, unsigned chattr_flags) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        int fdt = -1, r;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        assert(from);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        assert(to);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        RUN_WITH_UMASK(0000) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                fdt = open(to, flags|O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, mode);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                if (fdt < 0)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        return -errno;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        }
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (chattr_flags != 0)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                (void) chattr_fd(fdt, chattr_flags, (unsigned) -1);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        r = copy_file_fd(from, fdt, true);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (r < 0) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                close(fdt);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                unlink(to);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                return r;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        }
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (close(fdt) < 0) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                unlink_noerrno(to);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                return -errno;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        }
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        return 0;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer}
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyerint copy_file_atomic(const char *from, const char *to, mode_t mode, bool replace, unsigned chattr_flags) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        _cleanup_free_ char *t = NULL;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        int r;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        assert(from);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        assert(to);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        r = tempfn_random(to, NULL, &t);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (r < 0)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                return r;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        r = copy_file(from, t, O_NOFOLLOW|O_EXCL, mode, chattr_flags);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (r < 0)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                return r;
0d6e798a784ef0ba6b95512e4453067b2f84a91aHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (replace) {
0d6e798a784ef0ba6b95512e4453067b2f84a91aHarald Hoyer                r = renameat(AT_FDCWD, t, AT_FDCWD, to);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                if (r < 0)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        r = -errno;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        } else
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                r = rename_noreplace(AT_FDCWD, t, AT_FDCWD, to);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (r < 0) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                (void) unlink_noerrno(t);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                return r;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        }
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        return 0;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer}
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyerint copy_times(int fdf, int fdt) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        struct timespec ut[2];
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        struct stat st;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        usec_t crtime = 0;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        assert(fdf >= 0);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        assert(fdt >= 0);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (fstat(fdf, &st) < 0)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                return -errno;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        ut[0] = st.st_atim;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        ut[1] = st.st_mtim;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (futimens(fdt, ut) < 0)
0d6e798a784ef0ba6b95512e4453067b2f84a91aHarald Hoyer                return -errno;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
0d6e798a784ef0ba6b95512e4453067b2f84a91aHarald Hoyer        if (fd_getcrtime(fdf, &crtime) >= 0)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                (void) fd_setcrtime(fdt, crtime);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        return 0;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer}
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyerint copy_xattr(int fdf, int fdt) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        _cleanup_free_ char *bufa = NULL, *bufb = NULL;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        size_t sza = 100, szb = 100;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        ssize_t n;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        int ret = 0;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        const char *p;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        for (;;) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                bufa = malloc(sza);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                if (!bufa)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        return -ENOMEM;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                n = flistxattr(fdf, bufa, sza);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                if (n == 0)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        return 0;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                if (n > 0)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        break;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                if (errno != ERANGE)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        return -errno;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                sza *= 2;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                bufa = mfree(bufa);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        }
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        p = bufa;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        while (n > 0) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                size_t l;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                l = strlen(p);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                assert(l < (size_t) n);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                if (startswith(p, "user.")) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        ssize_t m;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        if (!bufb) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                                bufb = malloc(szb);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                                if (!bufb)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                                        return -ENOMEM;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        }
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        m = fgetxattr(fdf, p, bufb, szb);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        if (m < 0) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                                if (errno == ERANGE) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                                        szb *= 2;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                                        bufb = mfree(bufb);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                                        continue;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                                }
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                                return -errno;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        }
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        if (fsetxattr(fdt, p, bufb, m, 0) < 0)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                                ret = -errno;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                }
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                p += l + 1;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                n -= l + 1;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        }
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        return ret;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer}
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer