build-sys: split internal basic/ library from shared/

basic/      can be used by everything
            cannot use anything outside of basic/

libsystemd/ can use basic/
            cannot use shared/

shared/     can use libsystemd/

1 files changed, 0 insertions, 507 deletions

diff --git a/src/shared/copy.c b/src/shared/copy.c
deleted file mode 100644
index 1282cb88be..0000000000
--- a/src/shared/copy.c
+++ /dev/null
@@ -1,507 +0,0 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
-  This file is part of systemd.
-
-  Copyright 2014 Lennart Poettering
-
-  systemd is free software; you can redistribute it and/or modify it
-  under the terms of the GNU Lesser General Public License as published by
-  the Free Software Foundation; either version 2.1 of the License, or
-  (at your option) any later version.
-
-  systemd is distributed in the hope that it will be useful, but
-  WITHOUT ANY WARRANTY; without even the implied warranty of
-  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-  Lesser General Public License for more details.
-
-  You should have received a copy of the GNU Lesser General Public License
-  along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include <sys/sendfile.h>
-#include <sys/xattr.h>
-
-#include "util.h"
-#include "btrfs-util.h"
-#include "copy.h"
-
-#define COPY_BUFFER_SIZE (16*1024)
-
-int copy_bytes(int fdf, int fdt, off_t max_bytes, bool try_reflink) {
-        bool try_sendfile = true;
-        int r;
-
-        assert(fdf >= 0);
-        assert(fdt >= 0);
-
-        /* Try btrfs reflinks first. */
-        if (try_reflink && max_bytes == (off_t) -1) {
-                r = btrfs_reflink(fdf, fdt);
-                if (r >= 0)
-                        return r;
-        }
-
-        for (;;) {
-                size_t m = COPY_BUFFER_SIZE;
-                ssize_t n;
-
-                if (max_bytes != (off_t) -1) {
-
-                        if (max_bytes <= 0)
-                                return -EFBIG;
-
-                        if ((off_t) m > max_bytes)
-                                m = (size_t) max_bytes;
-                }
-
-                /* First try sendfile(), unless we already tried */
-                if (try_sendfile) {
-
-                        n = sendfile(fdt, fdf, NULL, m);
-                        if (n < 0) {
-                                if (errno != EINVAL && errno != ENOSYS)
-                                        return -errno;
-
-                                try_sendfile = false;
-                                /* use fallback below */
-                        } else if (n == 0) /* EOF */
-                                break;
-                        else if (n > 0)
-                                /* Succcess! */
-                                goto next;
-                }
-
-                /* As a fallback just copy bits by hand */
-                {
-                        char buf[m];
-
-                        n = read(fdf, buf, m);
-                        if (n < 0)
-                                return -errno;
-                        if (n == 0) /* EOF */
-                                break;
-
-                        r = loop_write(fdt, buf, (size_t) n, false);
-                        if (r < 0)
-                                return r;
-                }
-
-        next:
-                if (max_bytes != (off_t) -1) {
-                        assert(max_bytes >= n);
-                        max_bytes -= n;
-                }
-        }
-
-        return 0;
-}
-
-static int fd_copy_symlink(int df, const char *from, const struct stat *st, int dt, const char *to) {
-        _cleanup_free_ char *target = NULL;
-        int r;
-
-        assert(from);
-        assert(st);
-        assert(to);
-
-        r = readlinkat_malloc(df, from, &target);
-        if (r < 0)
-                return r;
-
-        if (symlinkat(target, dt, to) < 0)
-                return -errno;
-
-        if (fchownat(dt, to, st->st_uid, st->st_gid, AT_SYMLINK_NOFOLLOW) < 0)
-                return -errno;
-
-        return 0;
-}
-
-static int fd_copy_regular(int df, const char *from, const struct stat *st, int dt, const char *to) {
-        _cleanup_close_ int fdf = -1, fdt = -1;
-        struct timespec ts[2];
-        int r, q;
-
-        assert(from);
-        assert(st);
-        assert(to);
-
-        fdf = openat(df, from, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW);
-        if (fdf < 0)
-                return -errno;
-
-        fdt = openat(dt, to, O_WRONLY|O_CREAT|O_EXCL|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW, st->st_mode & 07777);
-        if (fdt < 0)
-                return -errno;
-
-        r = copy_bytes(fdf, fdt, (off_t) -1, true);
-        if (r < 0) {
-                unlinkat(dt, to, 0);
-                return r;
-        }
-
-        if (fchown(fdt, st->st_uid, st->st_gid) < 0)
-                r = -errno;
-
-        if (fchmod(fdt, st->st_mode & 07777) < 0)
-                r = -errno;
-
-        ts[0] = st->st_atim;
-        ts[1] = st->st_mtim;
-        (void) futimens(fdt, ts);
-
-        (void) copy_xattr(fdf, fdt);
-
-        q = close(fdt);
-        fdt = -1;
-
-        if (q < 0) {
-                r = -errno;
-                unlinkat(dt, to, 0);
-        }
-
-        return r;
-}
-
-static int fd_copy_fifo(int df, const char *from, const struct stat *st, int dt, const char *to) {
-        int r;
-
-        assert(from);
-        assert(st);
-        assert(to);
-
-        r = mkfifoat(dt, to, st->st_mode & 07777);
-        if (r < 0)
-                return -errno;
-
-        if (fchownat(dt, to, st->st_uid, st->st_gid, AT_SYMLINK_NOFOLLOW) < 0)
-                r = -errno;
-
-        if (fchmodat(dt, to, st->st_mode & 07777, 0) < 0)
-                r = -errno;
-
-        return r;
-}
-
-static int fd_copy_node(int df, const char *from, const struct stat *st, int dt, const char *to) {
-        int r;
-
-        assert(from);
-        assert(st);
-        assert(to);
-
-        r = mknodat(dt, to, st->st_mode, st->st_rdev);
-        if (r < 0)
-                return -errno;
-
-        if (fchownat(dt, to, st->st_uid, st->st_gid, AT_SYMLINK_NOFOLLOW) < 0)
-                r = -errno;
-
-        if (fchmodat(dt, to, st->st_mode & 07777, 0) < 0)
-                r = -errno;
-
-        return r;
-}
-
-static int fd_copy_directory(
-                int df,
-                const char *from,
-                const struct stat *st,
-                int dt,
-                const char *to,
-                dev_t original_device,
-                bool merge) {
-
-        _cleanup_close_ int fdf = -1, fdt = -1;
-        _cleanup_closedir_ DIR *d = NULL;
-        struct dirent *de;
-        bool created;
-        int r;
-
-        assert(st);
-        assert(to);
-
-        if (from)
-                fdf = openat(df, from, O_RDONLY|O_DIRECTORY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW);
-        else
-                fdf = fcntl(df, F_DUPFD_CLOEXEC, 3);
-
-        d = fdopendir(fdf);
-        if (!d)
-                return -errno;
-        fdf = -1;
-
-        r = mkdirat(dt, to, st->st_mode & 07777);
-        if (r >= 0)
-                created = true;
-        else if (errno == EEXIST && merge)
-                created = false;
-        else
-                return -errno;
-
-        fdt = openat(dt, to, O_RDONLY|O_DIRECTORY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW);
-        if (fdt < 0)
-                return -errno;
-
-        r = 0;
-
-        if (created) {
-                struct timespec ut[2] = {
-                        st->st_atim,
-                        st->st_mtim
-                };
-
-                if (fchown(fdt, st->st_uid, st->st_gid) < 0)
-                        r = -errno;
-
-                if (fchmod(fdt, st->st_mode & 07777) < 0)
-                        r = -errno;
-
-                (void) futimens(fdt, ut);
-                (void) copy_xattr(dirfd(d), fdt);
-        }
-
-        FOREACH_DIRENT(de, d, return -errno) {
-                struct stat buf;
-                int q;
-
-                if (fstatat(dirfd(d), de->d_name, &buf, AT_SYMLINK_NOFOLLOW) < 0) {
-                        r = -errno;
-                        continue;
-                }
-
-                if (buf.st_dev != original_device)
-                        continue;
-
-                if (S_ISREG(buf.st_mode))
-                        q = fd_copy_regular(dirfd(d), de->d_name, &buf, fdt, de->d_name);
-                else if (S_ISDIR(buf.st_mode))
-                        q = fd_copy_directory(dirfd(d), de->d_name, &buf, fdt, de->d_name, original_device, merge);
-                else if (S_ISLNK(buf.st_mode))
-                        q = fd_copy_symlink(dirfd(d), de->d_name, &buf, fdt, de->d_name);
-                else if (S_ISFIFO(buf.st_mode))
-                        q = fd_copy_fifo(dirfd(d), de->d_name, &buf, fdt, de->d_name);
-                else if (S_ISBLK(buf.st_mode) || S_ISCHR(buf.st_mode))
-                        q = fd_copy_node(dirfd(d), de->d_name, &buf, fdt, de->d_name);
-                else
-                        q = -EOPNOTSUPP;
-
-                if (q == -EEXIST && merge)
-                        q = 0;
-
-                if (q < 0)
-                        r = q;
-        }
-
-        return r;
-}
-
-int copy_tree_at(int fdf, const char *from, int fdt, const char *to, bool merge) {
-        struct stat st;
-
-        assert(from);
-        assert(to);
-
-        if (fstatat(fdf, from, &st, AT_SYMLINK_NOFOLLOW) < 0)
-                return -errno;
-
-        if (S_ISREG(st.st_mode))
-                return fd_copy_regular(fdf, from, &st, fdt, to);
-        else if (S_ISDIR(st.st_mode))
-                return fd_copy_directory(fdf, from, &st, fdt, to, st.st_dev, merge);
-        else if (S_ISLNK(st.st_mode))
-                return fd_copy_symlink(fdf, from, &st, fdt, to);
-        else if (S_ISFIFO(st.st_mode))
-                return fd_copy_fifo(fdf, from, &st, fdt, to);
-        else if (S_ISBLK(st.st_mode) || S_ISCHR(st.st_mode))
-                return fd_copy_node(fdf, from, &st, fdt, to);
-        else
-                return -EOPNOTSUPP;
-}
-
-int copy_tree(const char *from, const char *to, bool merge) {
-        return copy_tree_at(AT_FDCWD, from, AT_FDCWD, to, merge);
-}
-
-int copy_directory_fd(int dirfd, const char *to, bool merge) {
-
-        struct stat st;
-
-        assert(dirfd >= 0);
-        assert(to);
-
-        if (fstat(dirfd, &st) < 0)
-                return -errno;
-
-        if (!S_ISDIR(st.st_mode))
-                return -ENOTDIR;
-
-        return fd_copy_directory(dirfd, NULL, &st, AT_FDCWD, to, st.st_dev, merge);
-}
-
-int copy_file_fd(const char *from, int fdt, bool try_reflink) {
-        _cleanup_close_ int fdf = -1;
-        int r;
-
-        assert(from);
-        assert(fdt >= 0);
-
-        fdf = open(from, O_RDONLY|O_CLOEXEC|O_NOCTTY);
-        if (fdf < 0)
-                return -errno;
-
-        r = copy_bytes(fdf, fdt, (off_t) -1, try_reflink);
-
-        (void) copy_times(fdf, fdt);
-        (void) copy_xattr(fdf, fdt);
-
-        return r;
-}
-
-int copy_file(const char *from, const char *to, int flags, mode_t mode, unsigned chattr_flags) {
-        int fdt = -1, r;
-
-        assert(from);
-        assert(to);
-
-        RUN_WITH_UMASK(0000) {
-                fdt = open(to, flags|O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, mode);
-                if (fdt < 0)
-                        return -errno;
-        }
-
-        if (chattr_flags != 0)
-                (void) chattr_fd(fdt, chattr_flags, (unsigned) -1);
-
-        r = copy_file_fd(from, fdt, true);
-        if (r < 0) {
-                close(fdt);
-                unlink(to);
-                return r;
-        }
-
-        if (close(fdt) < 0) {
-                unlink_noerrno(to);
-                return -errno;
-        }
-
-        return 0;
-}
-
-int copy_file_atomic(const char *from, const char *to, mode_t mode, bool replace, unsigned chattr_flags) {
-        _cleanup_free_ char *t = NULL;
-        int r;
-
-        assert(from);
-        assert(to);
-
-        r = tempfn_random(to, &t);
-        if (r < 0)
-                return r;
-
-        r = copy_file(from, t, O_NOFOLLOW|O_EXCL, mode, chattr_flags);
-        if (r < 0)
-                return r;
-
-        if (replace) {
-                r = renameat(AT_FDCWD, t, AT_FDCWD, to);
-                if (r < 0)
-                        r = -errno;
-        } else
-                r = rename_noreplace(AT_FDCWD, t, AT_FDCWD, to);
-        if (r < 0) {
-                (void) unlink_noerrno(t);
-                return r;
-        }
-
-        return 0;
-}
-
-int copy_times(int fdf, int fdt) {
-        struct timespec ut[2];
-        struct stat st;
-        usec_t crtime = 0;
-
-        assert(fdf >= 0);
-        assert(fdt >= 0);
-
-        if (fstat(fdf, &st) < 0)
-                return -errno;
-
-        ut[0] = st.st_atim;
-        ut[1] = st.st_mtim;
-
-        if (futimens(fdt, ut) < 0)
-                return -errno;
-
-        if (fd_getcrtime(fdf, &crtime) >= 0)
-                (void) fd_setcrtime(fdt, crtime);
-
-        return 0;
-}
-
-int copy_xattr(int fdf, int fdt) {
-        _cleanup_free_ char *bufa = NULL, *bufb = NULL;
-        size_t sza = 100, szb = 100;
-        ssize_t n;
-        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;
-}