src/basic/copy.c

	copy.c revision 14bcf25c8b94b5c3556ba3983028a2b35ed0572f
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering/***
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering  This file is part of systemd.
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering  Copyright 2014 Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering  systemd is free software; you can redistribute it and/or modify it
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering  under the terms of the GNU Lesser General Public License as published by
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering  the Free Software Foundation; either version 2.1 of the License, or
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering  (at your option) any later version.
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering  systemd is distributed in the hope that it will be useful, but
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering  WITHOUT ANY WARRANTY; without even the implied warranty of
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering  Lesser General Public License for more details.
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering  You should have received a copy of the GNU Lesser General Public License
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering  along with systemd; If not, see <http://www.gnu.org/licenses/>.
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering***/
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering#include <sys/sendfile.h>
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering#include <sys/xattr.h>
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering#include "util.h"
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering#include "btrfs-util.h"
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering#include "copy.h"
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering#define COPY_BUFFER_SIZE (16*1024)
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poetteringint copy_bytes(int fdf, int fdt, off_t max_bytes, bool try_reflink) {
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        bool try_sendfile = true;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        int r;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        assert(fdf >= 0);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        assert(fdt >= 0);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        /* Try btrfs reflinks first. */
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        if (try_reflink && max_bytes == (off_t) -1) {
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                r = btrfs_reflink(fdf, fdt);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                if (r >= 0)
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                        return r;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        }
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        for (;;) {
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                size_t m = COPY_BUFFER_SIZE;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                ssize_t n;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                if (max_bytes != (off_t) -1) {
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                        if (max_bytes <= 0)
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                                return -EFBIG;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                        if ((off_t) m > max_bytes)
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                                m = (size_t) max_bytes;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                }
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                /* First try sendfile(), unless we already tried */
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                if (try_sendfile) {
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                        n = sendfile(fdt, fdf, NULL, m);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                        if (n < 0) {
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                                if (errno != EINVAL && errno != ENOSYS)
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                                        return -errno;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                                try_sendfile = false;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                                /* use fallback below */
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                        } else if (n == 0) /* EOF */
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                                break;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                        else if (n > 0)
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                                /* Succcess! */
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                                goto next;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                }
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                /* As a fallback just copy bits by hand */
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                {
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                        char buf[m];
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                        n = read(fdf, buf, m);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                        if (n < 0)
ec76e139d8ce0a1183ae7639ae31a28e7e90791bThomas Hindoe Paaboel Andersen                                return -errno;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                        if (n == 0) /* EOF */
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                                break;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                        r = loop_write(fdt, buf, (size_t) n, false);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                        if (r < 0)
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                                return r;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                }
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        next:
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                if (max_bytes != (off_t) -1) {
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                        assert(max_bytes >= n);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                        max_bytes -= n;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                }
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        }
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        return 0;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering}
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poetteringstatic int fd_copy_symlink(int df, const char *from, const struct stat *st, int dt, const char *to) {
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        _cleanup_free_ char *target = NULL;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        int r;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        assert(from);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        assert(st);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        assert(to);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        r = readlinkat_malloc(df, from, &target);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        if (r < 0)
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                return r;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        if (symlinkat(target, dt, to) < 0)
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                return -errno;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        if (fchownat(dt, to, st->st_uid, st->st_gid, AT_SYMLINK_NOFOLLOW) < 0)
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                return -errno;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        return 0;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering}
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poetteringstatic int fd_copy_regular(int df, const char *from, const struct stat *st, int dt, const char *to) {
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        _cleanup_close_ int fdf = -1, fdt = -1;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        struct timespec ts[2];
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        int r, q;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        assert(from);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        assert(st);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        assert(to);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        fdf = openat(df, from, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        if (fdf < 0)
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                return -errno;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        fdt = openat(dt, to, O_WRONLY|O_CREAT|O_EXCL|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW, st->st_mode & 07777);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        if (fdt < 0)
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                return -errno;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        r = copy_bytes(fdf, fdt, (off_t) -1, true);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        if (r < 0) {
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                unlinkat(dt, to, 0);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                return r;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        }
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        if (fchown(fdt, st->st_uid, st->st_gid) < 0)
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                r = -errno;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        if (fchmod(fdt, st->st_mode & 07777) < 0)
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                r = -errno;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        ts[0] = st->st_atim;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        ts[1] = st->st_mtim;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        (void) futimens(fdt, ts);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        (void) copy_xattr(fdf, fdt);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        q = close(fdt);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        fdt = -1;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        if (q < 0) {
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                r = -errno;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                unlinkat(dt, to, 0);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        }
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        return r;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering}
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poetteringstatic int fd_copy_fifo(int df, const char *from, const struct stat *st, int dt, const char *to) {
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        int r;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        assert(from);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        assert(st);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        assert(to);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        r = mkfifoat(dt, to, st->st_mode & 07777);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        if (r < 0)
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                return -errno;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        if (fchownat(dt, to, st->st_uid, st->st_gid, AT_SYMLINK_NOFOLLOW) < 0)
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                r = -errno;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        if (fchmodat(dt, to, st->st_mode & 07777, 0) < 0)
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                r = -errno;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        return r;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering}
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poetteringstatic int fd_copy_node(int df, const char *from, const struct stat *st, int dt, const char *to) {
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        int r;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        assert(from);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        assert(st);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        assert(to);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        r = mknodat(dt, to, st->st_mode, st->st_rdev);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        if (r < 0)
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                return -errno;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        if (fchownat(dt, to, st->st_uid, st->st_gid, AT_SYMLINK_NOFOLLOW) < 0)
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                r = -errno;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        if (fchmodat(dt, to, st->st_mode & 07777, 0) < 0)
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                r = -errno;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        return r;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering}
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poetteringstatic int fd_copy_directory(
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                int df,
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                const char *from,
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                const struct stat *st,
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                int dt,
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                const char *to,
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                dev_t original_device,
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                bool merge) {
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        _cleanup_close_ int fdf = -1, fdt = -1;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        _cleanup_closedir_ DIR *d = NULL;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        struct dirent *de;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        bool created;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        int r;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        assert(st);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        assert(to);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        if (from)
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                fdf = openat(df, from, O_RDONLY|O_DIRECTORY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        else
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                fdf = fcntl(df, F_DUPFD_CLOEXEC, 3);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        d = fdopendir(fdf);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        if (!d)
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                return -errno;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        fdf = -1;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        r = mkdirat(dt, to, st->st_mode & 07777);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        if (r >= 0)
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                created = true;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        else if (errno == EEXIST && merge)
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                created = false;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        else
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                return -errno;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        fdt = openat(dt, to, O_RDONLY|O_DIRECTORY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        if (fdt < 0)
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                return -errno;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        r = 0;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        if (created) {
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                struct timespec ut[2] = {
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                        st->st_atim,
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                        st->st_mtim
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                };
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                if (fchown(fdt, st->st_uid, st->st_gid) < 0)
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                        r = -errno;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                if (fchmod(fdt, st->st_mode & 07777) < 0)
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                        r = -errno;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                (void) futimens(fdt, ut);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                (void) copy_xattr(dirfd(d), fdt);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        }
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        FOREACH_DIRENT(de, d, return -errno) {
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                struct stat buf;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                int q;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                if (fstatat(dirfd(d), de->d_name, &buf, AT_SYMLINK_NOFOLLOW) < 0) {
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                        r = -errno;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                        continue;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                }
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                if (buf.st_dev != original_device)
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                        continue;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                if (S_ISREG(buf.st_mode))
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                        q = fd_copy_regular(dirfd(d), de->d_name, &buf, fdt, de->d_name);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                else if (S_ISDIR(buf.st_mode))
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                        q = fd_copy_directory(dirfd(d), de->d_name, &buf, fdt, de->d_name, original_device, merge);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                else if (S_ISLNK(buf.st_mode))
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                        q = fd_copy_symlink(dirfd(d), de->d_name, &buf, fdt, de->d_name);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                else if (S_ISFIFO(buf.st_mode))
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                        q = fd_copy_fifo(dirfd(d), de->d_name, &buf, fdt, de->d_name);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                else if (S_ISBLK(buf.st_mode) || S_ISCHR(buf.st_mode))
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                        q = fd_copy_node(dirfd(d), de->d_name, &buf, fdt, de->d_name);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                else
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                        q = -EOPNOTSUPP;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                if (q == -EEXIST && merge)
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                        q = 0;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                if (q < 0)
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                        r = q;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        }
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        return r;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering}
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poetteringint copy_tree_at(int fdf, const char *from, int fdt, const char *to, bool merge) {
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        struct stat st;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        assert(from);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        assert(to);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        if (fstatat(fdf, from, &st, AT_SYMLINK_NOFOLLOW) < 0)
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                return -errno;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        if (S_ISREG(st.st_mode))
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                return fd_copy_regular(fdf, from, &st, fdt, to);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        else if (S_ISDIR(st.st_mode))
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                return fd_copy_directory(fdf, from, &st, fdt, to, st.st_dev, merge);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        else if (S_ISLNK(st.st_mode))
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                return fd_copy_symlink(fdf, from, &st, fdt, to);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        else if (S_ISFIFO(st.st_mode))
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                return fd_copy_fifo(fdf, from, &st, fdt, to);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        else if (S_ISBLK(st.st_mode) || S_ISCHR(st.st_mode))
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                return fd_copy_node(fdf, from, &st, fdt, to);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        else
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                return -EOPNOTSUPP;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering}
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poetteringint copy_tree(const char *from, const char *to, bool merge) {
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        return copy_tree_at(AT_FDCWD, from, AT_FDCWD, to, merge);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering}
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poetteringint copy_directory_fd(int dirfd, const char *to, bool merge) {
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        struct stat st;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        assert(dirfd >= 0);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        assert(to);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        if (fstat(dirfd, &st) < 0)
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                return -errno;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        if (!S_ISDIR(st.st_mode))
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                return -ENOTDIR;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        return fd_copy_directory(dirfd, NULL, &st, AT_FDCWD, to, st.st_dev, merge);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering}
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poetteringint copy_file_fd(const char *from, int fdt, bool try_reflink) {
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        _cleanup_close_ int fdf = -1;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        int r;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        assert(from);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        assert(fdt >= 0);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        fdf = open(from, O_RDONLY|O_CLOEXEC|O_NOCTTY);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        if (fdf < 0)
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                return -errno;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        r = copy_bytes(fdf, fdt, (off_t) -1, try_reflink);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        (void) copy_times(fdf, fdt);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        (void) copy_xattr(fdf, fdt);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        return r;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering}
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poetteringint copy_file(const char *from, const char *to, int flags, mode_t mode, unsigned chattr_flags) {
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        int fdt = -1, r;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        assert(from);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        assert(to);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        RUN_WITH_UMASK(0000) {
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                fdt = open(to, flags|O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, mode);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                if (fdt < 0)
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                        return -errno;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        }
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        if (chattr_flags != 0)
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                (void) chattr_fd(fdt, chattr_flags, (unsigned) -1);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        r = copy_file_fd(from, fdt, true);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        if (r < 0) {
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                close(fdt);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                unlink(to);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                return r;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        }
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        if (close(fdt) < 0) {
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                unlink_noerrno(to);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                return -errno;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        }
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        return 0;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering}
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poetteringint copy_file_atomic(const char *from, const char *to, mode_t mode, bool replace, unsigned chattr_flags) {
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        _cleanup_free_ char *t = NULL;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        int r;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        assert(from);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        assert(to);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        r = tempfn_random(to, NULL, &t);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        if (r < 0)
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                return r;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        r = copy_file(from, t, O_NOFOLLOW|O_EXCL, mode, chattr_flags);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        if (r < 0)
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                return r;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        if (replace) {
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                r = renameat(AT_FDCWD, t, AT_FDCWD, to);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                if (r < 0)
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                        r = -errno;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        } else
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                r = rename_noreplace(AT_FDCWD, t, AT_FDCWD, to);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        if (r < 0) {
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                (void) unlink_noerrno(t);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                return r;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        }
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        return 0;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering}
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poetteringint copy_times(int fdf, int fdt) {
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        struct timespec ut[2];
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        struct stat st;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        usec_t crtime = 0;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        assert(fdf >= 0);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        assert(fdt >= 0);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        if (fstat(fdf, &st) < 0)
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                return -errno;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        ut[0] = st.st_atim;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        ut[1] = st.st_mtim;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        if (futimens(fdt, ut) < 0)
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                return -errno;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        if (fd_getcrtime(fdf, &crtime) >= 0)
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering                (void) fd_setcrtime(fdt, crtime);
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        return 0;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering}
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poetteringint copy_xattr(int fdf, int fdt) {
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        _cleanup_free_ char *bufa = NULL, *bufb = NULL;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        size_t sza = 100, szb = 100;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        ssize_t n;
dd0bc0f1414cc1d0fa73a29470bd14944e4942d3Lennart Poettering        int ret = 0;
        const char *p;

        for (;;) {
                bufa = malloc(sza);
                if (!bufa)
                        return -ENOMEM;

                n = flistxattr(fdf, bufa, sza);
                if (n == 0)
                        return 0;
                if (n > 0)
                        break;
                if (errno != ERANGE)
                        return -errno;

                sza *= 2;

                free(bufa);
                bufa = NULL;
        }

        p = bufa;
        while (n > 0) {
                size_t l;

                l = strlen(p);
                assert(l < (size_t) n);

                if (startswith(p, "user.")) {
                        ssize_t m;

                        if (!bufb) {
                                bufb = malloc(szb);
                                if (!bufb)
                                        return -ENOMEM;
                        }

                        m = fgetxattr(fdf, p, bufb, szb);
                        if (m < 0) {
                                if (errno == ERANGE) {
                                        szb *= 2;
                                        free(bufb);
                                        bufb = NULL;
                                        continue;
                                }

                                return -errno;
                        }

                        if (fsetxattr(fdt, p, bufb, m, 0) < 0)
                                ret = -errno;
                }

                p += l + 1;
                n -= l + 1;
        }

        return ret;
}