| /*** |
| This file is part of systemd. |
| |
| Copyright 2015 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/prctl.h> |
| |
| #include "sd-bus.h" |
| |
| #include "alloc-util.h" |
| #include "bus-common-errors.h" |
| #include "bus-util.h" |
| #include "def.h" |
| #include "fd-util.h" |
| #include "hostname-util.h" |
| #include "import-util.h" |
| #include "machine-pool.h" |
| #include "missing.h" |
| #include "mkdir.h" |
| #include "parse-util.h" |
| #include "path-util.h" |
| #include "process-util.h" |
| #include "signal-util.h" |
| #include "socket-util.h" |
| #include "string-table.h" |
| #include "strv.h" |
| #include "syslog-util.h" |
| #include "user-util.h" |
| #include "util.h" |
| #include "web-util.h" |
| |
| typedef struct Transfer Transfer; |
| typedef struct Manager Manager; |
| |
| typedef enum TransferType { |
| TRANSFER_IMPORT_TAR, |
| TRANSFER_IMPORT_RAW, |
| TRANSFER_EXPORT_TAR, |
| TRANSFER_EXPORT_RAW, |
| TRANSFER_PULL_TAR, |
| TRANSFER_PULL_RAW, |
| _TRANSFER_TYPE_MAX, |
| _TRANSFER_TYPE_INVALID = -1, |
| } TransferType; |
| |
| struct Transfer { |
| Manager *manager; |
| |
| uint32_t id; |
| char *object_path; |
| |
| TransferType type; |
| ImportVerify verify; |
| |
| char *remote; |
| char *local; |
| bool force_local; |
| bool read_only; |
| |
| char *format; |
| |
| pid_t pid; |
| |
| int log_fd; |
| |
| char log_message[LINE_MAX]; |
| size_t log_message_size; |
| |
| sd_event_source *pid_event_source; |
| sd_event_source *log_event_source; |
| |
| unsigned n_canceled; |
| unsigned progress_percent; |
| |
| int stdin_fd; |
| int stdout_fd; |
| }; |
| |
| struct Manager { |
| sd_event *event; |
| sd_bus *bus; |
| |
| uint32_t current_transfer_id; |
| Hashmap *transfers; |
| |
| Hashmap *polkit_registry; |
| |
| int notify_fd; |
| |
| sd_event_source *notify_event_source; |
| }; |
| |
| #define TRANSFERS_MAX 64 |
| |
| static const char* const transfer_type_table[_TRANSFER_TYPE_MAX] = { |
| [TRANSFER_IMPORT_TAR] = "import-tar", |
| [TRANSFER_IMPORT_RAW] = "import-raw", |
| [TRANSFER_EXPORT_TAR] = "export-tar", |
| [TRANSFER_EXPORT_RAW] = "export-raw", |
| [TRANSFER_PULL_TAR] = "pull-tar", |
| [TRANSFER_PULL_RAW] = "pull-raw", |
| }; |
| |
| DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(transfer_type, TransferType); |
| |
| static Transfer *transfer_unref(Transfer *t) { |
| if (!t) |
| return NULL; |
| |
| if (t->manager) |
| hashmap_remove(t->manager->transfers, UINT32_TO_PTR(t->id)); |
| |
| sd_event_source_unref(t->pid_event_source); |
| sd_event_source_unref(t->log_event_source); |
| |
| free(t->remote); |
| free(t->local); |
| free(t->format); |
| free(t->object_path); |
| |
| if (t->pid > 0) { |
| (void) kill_and_sigcont(t->pid, SIGKILL); |
| (void) wait_for_terminate(t->pid, NULL); |
| } |
| |
| safe_close(t->log_fd); |
| safe_close(t->stdin_fd); |
| safe_close(t->stdout_fd); |
| |
| return mfree(t); |
| } |
| |
| DEFINE_TRIVIAL_CLEANUP_FUNC(Transfer*, transfer_unref); |
| |
| static int transfer_new(Manager *m, Transfer **ret) { |
| _cleanup_(transfer_unrefp) Transfer *t = NULL; |
| uint32_t id; |
| int r; |
| |
| assert(m); |
| assert(ret); |
| |
| if (hashmap_size(m->transfers) >= TRANSFERS_MAX) |
| return -E2BIG; |
| |
| r = hashmap_ensure_allocated(&m->transfers, &trivial_hash_ops); |
| if (r < 0) |
| return r; |
| |
| t = new0(Transfer, 1); |
| if (!t) |
| return -ENOMEM; |
| |
| t->type = _TRANSFER_TYPE_INVALID; |
| t->log_fd = -1; |
| t->stdin_fd = -1; |
| t->stdout_fd = -1; |
| t->verify = _IMPORT_VERIFY_INVALID; |
| |
| id = m->current_transfer_id + 1; |
| |
| if (asprintf(&t->object_path, "/org/freedesktop/import1/transfer/_%" PRIu32, id) < 0) |
| return -ENOMEM; |
| |
| r = hashmap_put(m->transfers, UINT32_TO_PTR(id), t); |
| if (r < 0) |
| return r; |
| |
| m->current_transfer_id = id; |
| |
| t->manager = m; |
| t->id = id; |
| |
| *ret = t; |
| t = NULL; |
| |
| return 0; |
| } |
| |
| static void transfer_send_log_line(Transfer *t, const char *line) { |
| int r, priority = LOG_INFO; |
| |
| assert(t); |
| assert(line); |
| |
| syslog_parse_priority(&line, &priority, true); |
| |
| log_full(priority, "(transfer%" PRIu32 ") %s", t->id, line); |
| |
| r = sd_bus_emit_signal( |
| t->manager->bus, |
| t->object_path, |
| "org.freedesktop.import1.Transfer", |
| "LogMessage", |
| "us", |
| priority, |
| line); |
| if (r < 0) |
| log_error_errno(r, "Cannot emit message: %m"); |
| } |
| |
| static void transfer_send_logs(Transfer *t, bool flush) { |
| assert(t); |
| |
| /* Try to send out all log messages, if we can. But if we |
| * can't we remove the messages from the buffer, but don't |
| * fail */ |
| |
| while (t->log_message_size > 0) { |
| _cleanup_free_ char *n = NULL; |
| char *e; |
| |
| if (t->log_message_size >= sizeof(t->log_message)) |
| e = t->log_message + sizeof(t->log_message); |
| else { |
| char *a, *b; |
| |
| a = memchr(t->log_message, 0, t->log_message_size); |
| b = memchr(t->log_message, '\n', t->log_message_size); |
| |
| if (a && b) |
| e = a < b ? a : b; |
| else if (a) |
| e = a; |
| else |
| e = b; |
| } |
| |
| if (!e) { |
| if (!flush) |
| return; |
| |
| e = t->log_message + t->log_message_size; |
| } |
| |
| n = strndup(t->log_message, e - t->log_message); |
| |
| /* Skip over NUL and newlines */ |
| while ((e < t->log_message + t->log_message_size) && (*e == 0 || *e == '\n')) |
| e++; |
| |
| memmove(t->log_message, e, t->log_message + sizeof(t->log_message) - e); |
| t->log_message_size -= e - t->log_message; |
| |
| if (!n) { |
| log_oom(); |
| continue; |
| } |
| |
| if (isempty(n)) |
| continue; |
| |
| transfer_send_log_line(t, n); |
| } |
| } |
| |
| static int transfer_finalize(Transfer *t, bool success) { |
| int r; |
| |
| assert(t); |
| |
| transfer_send_logs(t, true); |
| |
| r = sd_bus_emit_signal( |
| t->manager->bus, |
| "/org/freedesktop/import1", |
| "org.freedesktop.import1.Manager", |
| "TransferRemoved", |
| "uos", |
| t->id, |
| t->object_path, |
| success ? "done" : |
| t->n_canceled > 0 ? "canceled" : "failed"); |
| |
| if (r < 0) |
| log_error_errno(r, "Cannot emit message: %m"); |
| |
| transfer_unref(t); |
| return 0; |
| } |
| |
| static int transfer_cancel(Transfer *t) { |
| int r; |
| |
| assert(t); |
| |
| r = kill_and_sigcont(t->pid, t->n_canceled < 3 ? SIGTERM : SIGKILL); |
| if (r < 0) |
| return r; |
| |
| t->n_canceled++; |
| return 0; |
| } |
| |
| static int transfer_on_pid(sd_event_source *s, const siginfo_t *si, void *userdata) { |
| Transfer *t = userdata; |
| bool success = false; |
| |
| assert(s); |
| assert(t); |
| |
| if (si->si_code == CLD_EXITED) { |
| if (si->si_status != 0) |
| log_error("Import process failed with exit code %i.", si->si_status); |
| else { |
| log_debug("Import process succeeded."); |
| success = true; |
| } |
| |
| } else if (si->si_code == CLD_KILLED || |
| si->si_code == CLD_DUMPED) |
| |
| log_error("Import process terminated by signal %s.", signal_to_string(si->si_status)); |
| else |
| log_error("Import process failed due to unknown reason."); |
| |
| t->pid = 0; |
| |
| return transfer_finalize(t, success); |
| } |
| |
| static int transfer_on_log(sd_event_source *s, int fd, uint32_t revents, void *userdata) { |
| Transfer *t = userdata; |
| ssize_t l; |
| |
| assert(s); |
| assert(t); |
| |
| l = read(fd, t->log_message + t->log_message_size, sizeof(t->log_message) - t->log_message_size); |
| if (l <= 0) { |
| /* EOF/read error. We just close the pipe here, and |
| * close the watch, waiting for the SIGCHLD to arrive, |
| * before we do anything else. */ |
| |
| if (l < 0) |
| log_error_errno(errno, "Failed to read log message: %m"); |
| |
| t->log_event_source = sd_event_source_unref(t->log_event_source); |
| return 0; |
| } |
| |
| t->log_message_size += l; |
| |
| transfer_send_logs(t, false); |
| |
| return 0; |
| } |
| |
| static int transfer_start(Transfer *t) { |
| _cleanup_close_pair_ int pipefd[2] = { -1, -1 }; |
| int r; |
| |
| assert(t); |
| assert(t->pid <= 0); |
| |
| if (pipe2(pipefd, O_CLOEXEC) < 0) |
| return -errno; |
| |
| t->pid = fork(); |
| if (t->pid < 0) |
| return -errno; |
| if (t->pid == 0) { |
| const char *cmd[] = { |
| NULL, /* systemd-import, systemd-export or systemd-pull */ |
| NULL, /* tar, raw */ |
| NULL, /* --verify= */ |
| NULL, /* verify argument */ |
| NULL, /* maybe --force */ |
| NULL, /* maybe --read-only */ |
| NULL, /* if so: the actual URL */ |
| NULL, /* maybe --format= */ |
| NULL, /* if so: the actual format */ |
| NULL, /* remote */ |
| NULL, /* local */ |
| NULL |
| }; |
| unsigned k = 0; |
| |
| /* Child */ |
| |
| (void) reset_all_signal_handlers(); |
| (void) reset_signal_mask(); |
| assert_se(prctl(PR_SET_PDEATHSIG, SIGTERM) == 0); |
| |
| pipefd[0] = safe_close(pipefd[0]); |
| |
| if (dup2(pipefd[1], STDERR_FILENO) != STDERR_FILENO) { |
| log_error_errno(errno, "Failed to dup2() fd: %m"); |
| _exit(EXIT_FAILURE); |
| } |
| |
| if (t->stdout_fd >= 0) { |
| if (dup2(t->stdout_fd, STDOUT_FILENO) != STDOUT_FILENO) { |
| log_error_errno(errno, "Failed to dup2() fd: %m"); |
| _exit(EXIT_FAILURE); |
| } |
| |
| if (t->stdout_fd != STDOUT_FILENO) |
| safe_close(t->stdout_fd); |
| } else { |
| if (dup2(pipefd[1], STDOUT_FILENO) != STDOUT_FILENO) { |
| log_error_errno(errno, "Failed to dup2() fd: %m"); |
| _exit(EXIT_FAILURE); |
| } |
| } |
| |
| if (pipefd[1] != STDOUT_FILENO && pipefd[1] != STDERR_FILENO) |
| pipefd[1] = safe_close(pipefd[1]); |
| |
| if (t->stdin_fd >= 0) { |
| if (dup2(t->stdin_fd, STDIN_FILENO) != STDIN_FILENO) { |
| log_error_errno(errno, "Failed to dup2() fd: %m"); |
| _exit(EXIT_FAILURE); |
| } |
| |
| if (t->stdin_fd != STDIN_FILENO) |
| safe_close(t->stdin_fd); |
| } else { |
| int null_fd; |
| |
| null_fd = open("/dev/null", O_RDONLY|O_NOCTTY); |
| if (null_fd < 0) { |
| log_error_errno(errno, "Failed to open /dev/null: %m"); |
| _exit(EXIT_FAILURE); |
| } |
| |
| if (dup2(null_fd, STDIN_FILENO) != STDIN_FILENO) { |
| log_error_errno(errno, "Failed to dup2() fd: %m"); |
| _exit(EXIT_FAILURE); |
| } |
| |
| if (null_fd != STDIN_FILENO) |
| safe_close(null_fd); |
| } |
| |
| stdio_unset_cloexec(); |
| |
| if (setenv("SYSTEMD_LOG_TARGET", "console-prefixed", 1) < 0 || |
| setenv("NOTIFY_SOCKET", "/run/systemd/import/notify", 1) < 0) { |
| log_error_errno(errno, "setenv() failed: %m"); |
| _exit(EXIT_FAILURE); |
| } |
| |
| if (IN_SET(t->type, TRANSFER_IMPORT_TAR, TRANSFER_IMPORT_RAW)) |
| cmd[k++] = SYSTEMD_IMPORT_PATH; |
| else if (IN_SET(t->type, TRANSFER_EXPORT_TAR, TRANSFER_EXPORT_RAW)) |
| cmd[k++] = SYSTEMD_EXPORT_PATH; |
| else |
| cmd[k++] = SYSTEMD_PULL_PATH; |
| |
| if (IN_SET(t->type, TRANSFER_IMPORT_TAR, TRANSFER_EXPORT_TAR, TRANSFER_PULL_TAR)) |
| cmd[k++] = "tar"; |
| else |
| cmd[k++] = "raw"; |
| |
| if (t->verify != _IMPORT_VERIFY_INVALID) { |
| cmd[k++] = "--verify"; |
| cmd[k++] = import_verify_to_string(t->verify); |
| } |
| |
| if (t->force_local) |
| cmd[k++] = "--force"; |
| if (t->read_only) |
| cmd[k++] = "--read-only"; |
| |
| if (t->format) { |
| cmd[k++] = "--format"; |
| cmd[k++] = t->format; |
| } |
| |
| if (!IN_SET(t->type, TRANSFER_EXPORT_TAR, TRANSFER_EXPORT_RAW)) { |
| if (t->remote) |
| cmd[k++] = t->remote; |
| else |
| cmd[k++] = "-"; |
| } |
| |
| if (t->local) |
| cmd[k++] = t->local; |
| cmd[k] = NULL; |
| |
| execv(cmd[0], (char * const *) cmd); |
| log_error_errno(errno, "Failed to execute %s tool: %m", cmd[0]); |
| _exit(EXIT_FAILURE); |
| } |
| |
| pipefd[1] = safe_close(pipefd[1]); |
| t->log_fd = pipefd[0]; |
| pipefd[0] = -1; |
| |
| t->stdin_fd = safe_close(t->stdin_fd); |
| |
| r = sd_event_add_child(t->manager->event, &t->pid_event_source, t->pid, WEXITED, transfer_on_pid, t); |
| if (r < 0) |
| return r; |
| |
| r = sd_event_add_io(t->manager->event, &t->log_event_source, t->log_fd, EPOLLIN, transfer_on_log, t); |
| if (r < 0) |
| return r; |
| |
| /* Make sure always process logging before SIGCHLD */ |
| r = sd_event_source_set_priority(t->log_event_source, SD_EVENT_PRIORITY_NORMAL -5); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_emit_signal( |
| t->manager->bus, |
| "/org/freedesktop/import1", |
| "org.freedesktop.import1.Manager", |
| "TransferNew", |
| "uo", |
| t->id, |
| t->object_path); |
| if (r < 0) |
| return r; |
| |
| return 0; |
| } |
| |
| static Manager *manager_unref(Manager *m) { |
| Transfer *t; |
| |
| if (!m) |
| return NULL; |
| |
| sd_event_source_unref(m->notify_event_source); |
| safe_close(m->notify_fd); |
| |
| while ((t = hashmap_first(m->transfers))) |
| transfer_unref(t); |
| |
| hashmap_free(m->transfers); |
| |
| bus_verify_polkit_async_registry_free(m->polkit_registry); |
| |
| m->bus = sd_bus_flush_close_unref(m->bus); |
| sd_event_unref(m->event); |
| |
| return mfree(m); |
| } |
| |
| DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_unref); |
| |
| static int manager_on_notify(sd_event_source *s, int fd, uint32_t revents, void *userdata) { |
| |
| char buf[NOTIFY_BUFFER_MAX+1]; |
| struct iovec iovec = { |
| .iov_base = buf, |
| .iov_len = sizeof(buf)-1, |
| }; |
| union { |
| struct cmsghdr cmsghdr; |
| uint8_t buf[CMSG_SPACE(sizeof(struct ucred)) + |
| CMSG_SPACE(sizeof(int) * NOTIFY_FD_MAX)]; |
| } control = {}; |
| struct msghdr msghdr = { |
| .msg_iov = &iovec, |
| .msg_iovlen = 1, |
| .msg_control = &control, |
| .msg_controllen = sizeof(control), |
| }; |
| struct ucred *ucred = NULL; |
| Manager *m = userdata; |
| struct cmsghdr *cmsg; |
| unsigned percent; |
| char *p, *e; |
| Transfer *t; |
| Iterator i; |
| ssize_t n; |
| int r; |
| |
| n = recvmsg(fd, &msghdr, MSG_DONTWAIT|MSG_CMSG_CLOEXEC); |
| if (n < 0) { |
| if (errno == EAGAIN || errno == EINTR) |
| return 0; |
| |
| return -errno; |
| } |
| |
| cmsg_close_all(&msghdr); |
| |
| CMSG_FOREACH(cmsg, &msghdr) |
| if (cmsg->cmsg_level == SOL_SOCKET && |
| cmsg->cmsg_type == SCM_CREDENTIALS && |
| cmsg->cmsg_len == CMSG_LEN(sizeof(struct ucred))) |
| ucred = (struct ucred*) CMSG_DATA(cmsg); |
| |
| if (msghdr.msg_flags & MSG_TRUNC) { |
| log_warning("Got overly long notification datagram, ignoring."); |
| return 0; |
| } |
| |
| if (!ucred || ucred->pid <= 0) { |
| log_warning("Got notification datagram lacking credential information, ignoring."); |
| return 0; |
| } |
| |
| HASHMAP_FOREACH(t, m->transfers, i) |
| if (ucred->pid == t->pid) |
| break; |
| |
| if (!t) { |
| log_warning("Got notification datagram from unexpected peer, ignoring."); |
| return 0; |
| } |
| |
| buf[n] = 0; |
| |
| p = startswith(buf, "X_IMPORT_PROGRESS="); |
| if (!p) { |
| p = strstr(buf, "\nX_IMPORT_PROGRESS="); |
| if (!p) |
| return 0; |
| |
| p += 19; |
| } |
| |
| e = strchrnul(p, '\n'); |
| *e = 0; |
| |
| r = safe_atou(p, &percent); |
| if (r < 0 || percent > 100) { |
| log_warning("Got invalid percent value, ignoring."); |
| return 0; |
| } |
| |
| t->progress_percent = percent; |
| |
| log_debug("Got percentage from client: %u%%", percent); |
| return 0; |
| } |
| |
| static int manager_new(Manager **ret) { |
| _cleanup_(manager_unrefp) Manager *m = NULL; |
| static const union sockaddr_union sa = { |
| .un.sun_family = AF_UNIX, |
| .un.sun_path = "/run/systemd/import/notify", |
| }; |
| static const int one = 1; |
| int r; |
| |
| assert(ret); |
| |
| m = new0(Manager, 1); |
| if (!m) |
| return -ENOMEM; |
| |
| r = sd_event_default(&m->event); |
| if (r < 0) |
| return r; |
| |
| sd_event_set_watchdog(m->event, true); |
| |
| r = sd_bus_default_system(&m->bus); |
| if (r < 0) |
| return r; |
| |
| m->notify_fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0); |
| if (m->notify_fd < 0) |
| return -errno; |
| |
| (void) mkdir_parents_label(sa.un.sun_path, 0755); |
| (void) unlink(sa.un.sun_path); |
| |
| if (bind(m->notify_fd, &sa.sa, SOCKADDR_UN_LEN(sa.un)) < 0) |
| return -errno; |
| |
| if (setsockopt(m->notify_fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one)) < 0) |
| return -errno; |
| |
| r = sd_event_add_io(m->event, &m->notify_event_source, m->notify_fd, EPOLLIN, manager_on_notify, m); |
| if (r < 0) |
| return r; |
| |
| *ret = m; |
| m = NULL; |
| |
| return 0; |
| } |
| |
| static Transfer *manager_find(Manager *m, TransferType type, const char *remote) { |
| Transfer *t; |
| Iterator i; |
| |
| assert(m); |
| assert(type >= 0); |
| assert(type < _TRANSFER_TYPE_MAX); |
| |
| HASHMAP_FOREACH(t, m->transfers, i) { |
| |
| if (t->type == type && |
| streq_ptr(t->remote, remote)) |
| return t; |
| } |
| |
| return NULL; |
| } |
| |
| static int method_import_tar_or_raw(sd_bus_message *msg, void *userdata, sd_bus_error *error) { |
| _cleanup_(transfer_unrefp) Transfer *t = NULL; |
| int fd, force, read_only, r; |
| const char *local, *object; |
| Manager *m = userdata; |
| TransferType type; |
| uint32_t id; |
| |
| assert(msg); |
| assert(m); |
| |
| r = bus_verify_polkit_async( |
| msg, |
| CAP_SYS_ADMIN, |
| "org.freedesktop.import1.import", |
| NULL, |
| false, |
| UID_INVALID, |
| &m->polkit_registry, |
| error); |
| if (r < 0) |
| return r; |
| if (r == 0) |
| return 1; /* Will call us back */ |
| |
| r = sd_bus_message_read(msg, "hsbb", &fd, &local, &force, &read_only); |
| if (r < 0) |
| return r; |
| |
| if (!machine_name_is_valid(local)) |
| return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Local name %s is invalid", local); |
| |
| r = setup_machine_directory((uint64_t) -1, error); |
| if (r < 0) |
| return r; |
| |
| type = streq_ptr(sd_bus_message_get_member(msg), "ImportTar") ? TRANSFER_IMPORT_TAR : TRANSFER_IMPORT_RAW; |
| |
| r = transfer_new(m, &t); |
| if (r < 0) |
| return r; |
| |
| t->type = type; |
| t->force_local = force; |
| t->read_only = read_only; |
| |
| t->local = strdup(local); |
| if (!t->local) |
| return -ENOMEM; |
| |
| t->stdin_fd = fcntl(fd, F_DUPFD_CLOEXEC, 3); |
| if (t->stdin_fd < 0) |
| return -errno; |
| |
| r = transfer_start(t); |
| if (r < 0) |
| return r; |
| |
| object = t->object_path; |
| id = t->id; |
| t = NULL; |
| |
| return sd_bus_reply_method_return(msg, "uo", id, object); |
| } |
| |
| static int method_export_tar_or_raw(sd_bus_message *msg, void *userdata, sd_bus_error *error) { |
| _cleanup_(transfer_unrefp) Transfer *t = NULL; |
| int fd, r; |
| const char *local, *object, *format; |
| Manager *m = userdata; |
| TransferType type; |
| uint32_t id; |
| |
| assert(msg); |
| assert(m); |
| |
| r = bus_verify_polkit_async( |
| msg, |
| CAP_SYS_ADMIN, |
| "org.freedesktop.import1.export", |
| NULL, |
| false, |
| UID_INVALID, |
| &m->polkit_registry, |
| error); |
| if (r < 0) |
| return r; |
| if (r == 0) |
| return 1; /* Will call us back */ |
| |
| r = sd_bus_message_read(msg, "shs", &local, &fd, &format); |
| if (r < 0) |
| return r; |
| |
| if (!machine_name_is_valid(local)) |
| return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Local name %s is invalid", local); |
| |
| type = streq_ptr(sd_bus_message_get_member(msg), "ExportTar") ? TRANSFER_EXPORT_TAR : TRANSFER_EXPORT_RAW; |
| |
| r = transfer_new(m, &t); |
| if (r < 0) |
| return r; |
| |
| t->type = type; |
| |
| if (!isempty(format)) { |
| t->format = strdup(format); |
| if (!t->format) |
| return -ENOMEM; |
| } |
| |
| t->local = strdup(local); |
| if (!t->local) |
| return -ENOMEM; |
| |
| t->stdout_fd = fcntl(fd, F_DUPFD_CLOEXEC, 3); |
| if (t->stdout_fd < 0) |
| return -errno; |
| |
| r = transfer_start(t); |
| if (r < 0) |
| return r; |
| |
| object = t->object_path; |
| id = t->id; |
| t = NULL; |
| |
| return sd_bus_reply_method_return(msg, "uo", id, object); |
| } |
| |
| static int method_pull_tar_or_raw(sd_bus_message *msg, void *userdata, sd_bus_error *error) { |
| _cleanup_(transfer_unrefp) Transfer *t = NULL; |
| const char *remote, *local, *verify, *object; |
| Manager *m = userdata; |
| ImportVerify v; |
| TransferType type; |
| int force, r; |
| uint32_t id; |
| |
| assert(msg); |
| assert(m); |
| |
| r = bus_verify_polkit_async( |
| msg, |
| CAP_SYS_ADMIN, |
| "org.freedesktop.import1.pull", |
| NULL, |
| false, |
| UID_INVALID, |
| &m->polkit_registry, |
| error); |
| if (r < 0) |
| return r; |
| if (r == 0) |
| return 1; /* Will call us back */ |
| |
| r = sd_bus_message_read(msg, "sssb", &remote, &local, &verify, &force); |
| if (r < 0) |
| return r; |
| |
| if (!http_url_is_valid(remote)) |
| return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "URL %s is invalid", remote); |
| |
| if (isempty(local)) |
| local = NULL; |
| else if (!machine_name_is_valid(local)) |
| return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Local name %s is invalid", local); |
| |
| if (isempty(verify)) |
| v = IMPORT_VERIFY_SIGNATURE; |
| else |
| v = import_verify_from_string(verify); |
| if (v < 0) |
| return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unknown verification mode %s", verify); |
| |
| r = setup_machine_directory((uint64_t) -1, error); |
| if (r < 0) |
| return r; |
| |
| type = streq_ptr(sd_bus_message_get_member(msg), "PullTar") ? TRANSFER_PULL_TAR : TRANSFER_PULL_RAW; |
| |
| if (manager_find(m, type, remote)) |
| return sd_bus_error_setf(error, BUS_ERROR_TRANSFER_IN_PROGRESS, "Transfer for %s already in progress.", remote); |
| |
| r = transfer_new(m, &t); |
| if (r < 0) |
| return r; |
| |
| t->type = type; |
| t->verify = v; |
| t->force_local = force; |
| |
| t->remote = strdup(remote); |
| if (!t->remote) |
| return -ENOMEM; |
| |
| if (local) { |
| t->local = strdup(local); |
| if (!t->local) |
| return -ENOMEM; |
| } |
| |
| r = transfer_start(t); |
| if (r < 0) |
| return r; |
| |
| object = t->object_path; |
| id = t->id; |
| t = NULL; |
| |
| return sd_bus_reply_method_return(msg, "uo", id, object); |
| } |
| |
| static int method_list_transfers(sd_bus_message *msg, void *userdata, sd_bus_error *error) { |
| _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; |
| Manager *m = userdata; |
| Transfer *t; |
| Iterator i; |
| int r; |
| |
| assert(msg); |
| assert(m); |
| |
| r = sd_bus_message_new_method_return(msg, &reply); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_open_container(reply, 'a', "(usssdo)"); |
| if (r < 0) |
| return r; |
| |
| HASHMAP_FOREACH(t, m->transfers, i) { |
| |
| r = sd_bus_message_append( |
| reply, |
| "(usssdo)", |
| t->id, |
| transfer_type_to_string(t->type), |
| t->remote, |
| t->local, |
| (double) t->progress_percent / 100.0, |
| t->object_path); |
| if (r < 0) |
| return r; |
| } |
| |
| r = sd_bus_message_close_container(reply); |
| if (r < 0) |
| return r; |
| |
| return sd_bus_send(NULL, reply, NULL); |
| } |
| |
| static int method_cancel(sd_bus_message *msg, void *userdata, sd_bus_error *error) { |
| Transfer *t = userdata; |
| int r; |
| |
| assert(msg); |
| assert(t); |
| |
| r = bus_verify_polkit_async( |
| msg, |
| CAP_SYS_ADMIN, |
| "org.freedesktop.import1.pull", |
| NULL, |
| false, |
| UID_INVALID, |
| &t->manager->polkit_registry, |
| error); |
| if (r < 0) |
| return r; |
| if (r == 0) |
| return 1; /* Will call us back */ |
| |
| r = transfer_cancel(t); |
| if (r < 0) |
| return r; |
| |
| return sd_bus_reply_method_return(msg, NULL); |
| } |
| |
| static int method_cancel_transfer(sd_bus_message *msg, void *userdata, sd_bus_error *error) { |
| Manager *m = userdata; |
| Transfer *t; |
| uint32_t id; |
| int r; |
| |
| assert(msg); |
| assert(m); |
| |
| r = bus_verify_polkit_async( |
| msg, |
| CAP_SYS_ADMIN, |
| "org.freedesktop.import1.pull", |
| NULL, |
| false, |
| UID_INVALID, |
| &m->polkit_registry, |
| error); |
| if (r < 0) |
| return r; |
| if (r == 0) |
| return 1; /* Will call us back */ |
| |
| r = sd_bus_message_read(msg, "u", &id); |
| if (r < 0) |
| return r; |
| if (id <= 0) |
| return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid transfer id"); |
| |
| t = hashmap_get(m->transfers, UINT32_TO_PTR(id)); |
| if (!t) |
| return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_TRANSFER, "No transfer by id %" PRIu32, id); |
| |
| r = transfer_cancel(t); |
| if (r < 0) |
| return r; |
| |
| return sd_bus_reply_method_return(msg, NULL); |
| } |
| |
| static int property_get_progress( |
| sd_bus *bus, |
| const char *path, |
| const char *interface, |
| const char *property, |
| sd_bus_message *reply, |
| void *userdata, |
| sd_bus_error *error) { |
| |
| Transfer *t = userdata; |
| |
| assert(bus); |
| assert(reply); |
| assert(t); |
| |
| return sd_bus_message_append(reply, "d", (double) t->progress_percent / 100.0); |
| } |
| |
| static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_type, transfer_type, TransferType); |
| static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_verify, import_verify, ImportVerify); |
| |
| static const sd_bus_vtable transfer_vtable[] = { |
| SD_BUS_VTABLE_START(0), |
| SD_BUS_PROPERTY("Id", "u", NULL, offsetof(Transfer, id), SD_BUS_VTABLE_PROPERTY_CONST), |
| SD_BUS_PROPERTY("Local", "s", NULL, offsetof(Transfer, local), SD_BUS_VTABLE_PROPERTY_CONST), |
| SD_BUS_PROPERTY("Remote", "s", NULL, offsetof(Transfer, remote), SD_BUS_VTABLE_PROPERTY_CONST), |
| SD_BUS_PROPERTY("Type", "s", property_get_type, offsetof(Transfer, type), SD_BUS_VTABLE_PROPERTY_CONST), |
| SD_BUS_PROPERTY("Verify", "s", property_get_verify, offsetof(Transfer, verify), SD_BUS_VTABLE_PROPERTY_CONST), |
| SD_BUS_PROPERTY("Progress", "d", property_get_progress, 0, 0), |
| SD_BUS_METHOD("Cancel", NULL, NULL, method_cancel, SD_BUS_VTABLE_UNPRIVILEGED), |
| SD_BUS_SIGNAL("LogMessage", "us", 0), |
| SD_BUS_VTABLE_END, |
| }; |
| |
| static const sd_bus_vtable manager_vtable[] = { |
| SD_BUS_VTABLE_START(0), |
| SD_BUS_METHOD("ImportTar", "hsbb", "uo", method_import_tar_or_raw, SD_BUS_VTABLE_UNPRIVILEGED), |
| SD_BUS_METHOD("ImportRaw", "hsbb", "uo", method_import_tar_or_raw, SD_BUS_VTABLE_UNPRIVILEGED), |
| SD_BUS_METHOD("ExportTar", "shs", "uo", method_export_tar_or_raw, SD_BUS_VTABLE_UNPRIVILEGED), |
| SD_BUS_METHOD("ExportRaw", "shs", "uo", method_export_tar_or_raw, SD_BUS_VTABLE_UNPRIVILEGED), |
| SD_BUS_METHOD("PullTar", "sssb", "uo", method_pull_tar_or_raw, SD_BUS_VTABLE_UNPRIVILEGED), |
| SD_BUS_METHOD("PullRaw", "sssb", "uo", method_pull_tar_or_raw, SD_BUS_VTABLE_UNPRIVILEGED), |
| SD_BUS_METHOD("ListTransfers", NULL, "a(usssdo)", method_list_transfers, SD_BUS_VTABLE_UNPRIVILEGED), |
| SD_BUS_METHOD("CancelTransfer", "u", NULL, method_cancel_transfer, SD_BUS_VTABLE_UNPRIVILEGED), |
| SD_BUS_SIGNAL("TransferNew", "uo", 0), |
| SD_BUS_SIGNAL("TransferRemoved", "uos", 0), |
| SD_BUS_VTABLE_END, |
| }; |
| |
| static int transfer_object_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error) { |
| Manager *m = userdata; |
| Transfer *t; |
| const char *p; |
| uint32_t id; |
| int r; |
| |
| assert(bus); |
| assert(path); |
| assert(interface); |
| assert(found); |
| assert(m); |
| |
| p = startswith(path, "/org/freedesktop/import1/transfer/_"); |
| if (!p) |
| return 0; |
| |
| r = safe_atou32(p, &id); |
| if (r < 0 || id == 0) |
| return 0; |
| |
| t = hashmap_get(m->transfers, UINT32_TO_PTR(id)); |
| if (!t) |
| return 0; |
| |
| *found = t; |
| return 1; |
| } |
| |
| static int transfer_node_enumerator(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error) { |
| _cleanup_strv_free_ char **l = NULL; |
| Manager *m = userdata; |
| Transfer *t; |
| unsigned k = 0; |
| Iterator i; |
| |
| l = new0(char*, hashmap_size(m->transfers) + 1); |
| if (!l) |
| return -ENOMEM; |
| |
| HASHMAP_FOREACH(t, m->transfers, i) { |
| |
| l[k] = strdup(t->object_path); |
| if (!l[k]) |
| return -ENOMEM; |
| |
| k++; |
| } |
| |
| *nodes = l; |
| l = NULL; |
| |
| return 1; |
| } |
| |
| static int manager_add_bus_objects(Manager *m) { |
| int r; |
| |
| assert(m); |
| |
| r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/import1", "org.freedesktop.import1.Manager", manager_vtable, m); |
| if (r < 0) |
| return log_error_errno(r, "Failed to register object: %m"); |
| |
| r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/import1/transfer", "org.freedesktop.import1.Transfer", transfer_vtable, transfer_object_find, m); |
| if (r < 0) |
| return log_error_errno(r, "Failed to register object: %m"); |
| |
| r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/import1/transfer", transfer_node_enumerator, m); |
| if (r < 0) |
| return log_error_errno(r, "Failed to add transfer enumerator: %m"); |
| |
| r = sd_bus_request_name(m->bus, "org.freedesktop.import1", 0); |
| if (r < 0) |
| return log_error_errno(r, "Failed to register name: %m"); |
| |
| r = sd_bus_attach_event(m->bus, m->event, 0); |
| if (r < 0) |
| return log_error_errno(r, "Failed to attach bus to event loop: %m"); |
| |
| return 0; |
| } |
| |
| static bool manager_check_idle(void *userdata) { |
| Manager *m = userdata; |
| |
| return hashmap_isempty(m->transfers); |
| } |
| |
| static int manager_run(Manager *m) { |
| assert(m); |
| |
| return bus_event_loop_with_idle( |
| m->event, |
| m->bus, |
| "org.freedesktop.import1", |
| DEFAULT_EXIT_USEC, |
| manager_check_idle, |
| m); |
| } |
| |
| int main(int argc, char *argv[]) { |
| _cleanup_(manager_unrefp) Manager *m = NULL; |
| int r; |
| |
| log_set_target(LOG_TARGET_AUTO); |
| log_parse_environment(); |
| log_open(); |
| |
| umask(0022); |
| |
| if (argc != 1) { |
| log_error("This program takes no arguments."); |
| r = -EINVAL; |
| goto finish; |
| } |
| |
| assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGCHLD, -1) >= 0); |
| |
| r = manager_new(&m); |
| if (r < 0) { |
| log_error_errno(r, "Failed to allocate manager object: %m"); |
| goto finish; |
| } |
| |
| r = manager_add_bus_objects(m); |
| if (r < 0) |
| goto finish; |
| |
| r = manager_run(m); |
| if (r < 0) { |
| log_error_errno(r, "Failed to run event loop: %m"); |
| goto finish; |
| } |
| |
| finish: |
| return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; |
| } |