diff options
Diffstat (limited to 'src/import/import.c')
| -rw-r--r-- | src/import/import.c | 336 |
1 files changed, 336 insertions, 0 deletions
diff --git a/src/import/import.c b/src/import/import.c new file mode 100644 index 0000000000..762c425e6f --- /dev/null +++ b/src/import/import.c @@ -0,0 +1,336 @@ +/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ + +/*** + 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 <getopt.h> + +#include "sd-event.h" +#include "event-util.h" +#include "verbs.h" +#include "build.h" +#include "machine-image.h" +#include "import-util.h" +#include "import-tar.h" +#include "import-raw.h" + +static bool arg_force = false; +static bool arg_read_only = false; +static const char *arg_image_root = "/var/lib/machines"; + +static int interrupt_signal_handler(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) { + log_notice("Transfer aborted."); + sd_event_exit(sd_event_source_get_event(s), EINTR); + return 0; +} + +static void on_tar_finished(TarImport *import, int error, void *userdata) { + sd_event *event = userdata; + assert(import); + + if (error == 0) + log_info("Operation completed successfully."); + + sd_event_exit(event, abs(error)); +} + +static int import_tar(int argc, char *argv[], void *userdata) { + _cleanup_(tar_import_unrefp) TarImport *import = NULL; + _cleanup_event_unref_ sd_event *event = NULL; + const char *path = NULL, *local = NULL; + _cleanup_free_ char *ll = NULL; + _cleanup_close_ int open_fd = -1; + int r, fd; + + if (argc >= 2) + path = argv[1]; + if (isempty(path) || streq(path, "-")) + path = NULL; + + if (argc >= 3) + local = argv[2]; + else if (path) + local = basename(path); + if (isempty(local) || streq(local, "-")) + local = NULL; + + if (local) { + r = tar_strip_suffixes(local, &ll); + if (r < 0) + return log_oom(); + + local = ll; + + if (!machine_name_is_valid(local)) { + log_error("Local image name '%s' is not valid.", local); + return -EINVAL; + } + + if (!arg_force) { + r = image_find(local, NULL); + if (r < 0) + return log_error_errno(r, "Failed to check whether image '%s' exists: %m", local); + else if (r > 0) { + log_error_errno(EEXIST, "Image '%s' already exists.", local); + return -EEXIST; + } + } + } else + local = "imported"; + + if (path) { + open_fd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY); + if (open_fd < 0) + return log_error_errno(errno, "Failed to open tar image to import: %m"); + + fd = open_fd; + + log_info("Importing '%s', saving as '%s'.", path, local); + } else { + _cleanup_free_ char *pretty = NULL; + + fd = STDIN_FILENO; + + (void) readlink_malloc("/proc/self/fd/0", &pretty); + log_info("Importing '%s', saving as '%s'.", strna(pretty), local); + } + + r = sd_event_default(&event); + if (r < 0) + return log_error_errno(r, "Failed to allocate event loop: %m"); + + assert_se(sigprocmask_many(SIG_BLOCK, SIGTERM, SIGINT, -1) == 0); + sd_event_add_signal(event, NULL, SIGTERM, interrupt_signal_handler, NULL); + sd_event_add_signal(event, NULL, SIGINT, interrupt_signal_handler, NULL); + + r = tar_import_new(&import, event, arg_image_root, on_tar_finished, event); + if (r < 0) + return log_error_errno(r, "Failed to allocate importer: %m"); + + r = tar_import_start(import, fd, local, arg_force, arg_read_only); + if (r < 0) + return log_error_errno(r, "Failed to import image: %m"); + + r = sd_event_loop(event); + if (r < 0) + return log_error_errno(r, "Failed to run event loop: %m"); + + log_info("Exiting."); + return -r; +} + +static void on_raw_finished(RawImport *import, int error, void *userdata) { + sd_event *event = userdata; + assert(import); + + if (error == 0) + log_info("Operation completed successfully."); + + sd_event_exit(event, abs(error)); +} + +static int import_raw(int argc, char *argv[], void *userdata) { + _cleanup_(raw_import_unrefp) RawImport *import = NULL; + _cleanup_event_unref_ sd_event *event = NULL; + const char *path = NULL, *local = NULL; + _cleanup_free_ char *ll = NULL; + _cleanup_close_ int open_fd = -1; + int r, fd; + + if (argc >= 2) + path = argv[1]; + if (isempty(path) || streq(path, "-")) + path = NULL; + + if (argc >= 3) + local = argv[2]; + else if (path) + local = basename(path); + if (isempty(local) || streq(local, "-")) + local = NULL; + + if (local) { + r = raw_strip_suffixes(local, &ll); + if (r < 0) + return log_oom(); + + local = ll; + + if (!machine_name_is_valid(local)) { + log_error("Local image name '%s' is not valid.", local); + return -EINVAL; + } + + if (!arg_force) { + r = image_find(local, NULL); + if (r < 0) + return log_error_errno(r, "Failed to check whether image '%s' exists: %m", local); + else if (r > 0) { + log_error_errno(EEXIST, "Image '%s' already exists.", local); + return -EEXIST; + } + } + } else + local = "imported"; + + if (path) { + open_fd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY); + if (open_fd < 0) + return log_error_errno(errno, "Failed to open raw image to import: %m"); + + fd = open_fd; + + log_info("Importing '%s', saving as '%s'.", path, local); + } else { + _cleanup_free_ char *pretty = NULL; + + fd = STDIN_FILENO; + + (void) readlink_malloc("/proc/self/fd/0", &pretty); + log_info("Importing '%s', saving as '%s'.", pretty, local); + } + + r = sd_event_default(&event); + if (r < 0) + return log_error_errno(r, "Failed to allocate event loop: %m"); + + assert_se(sigprocmask_many(SIG_BLOCK, SIGTERM, SIGINT, -1) == 0); + sd_event_add_signal(event, NULL, SIGTERM, interrupt_signal_handler, NULL); + sd_event_add_signal(event, NULL, SIGINT, interrupt_signal_handler, NULL); + + r = raw_import_new(&import, event, arg_image_root, on_raw_finished, event); + if (r < 0) + return log_error_errno(r, "Failed to allocate importer: %m"); + + r = raw_import_start(import, fd, local, arg_force, arg_read_only); + if (r < 0) + return log_error_errno(r, "Failed to import image: %m"); + + r = sd_event_loop(event); + if (r < 0) + return log_error_errno(r, "Failed to run event loop: %m"); + + log_info("Exiting."); + return -r; +} + +static int help(int argc, char *argv[], void *userdata) { + + printf("%s [OPTIONS...] {COMMAND} ...\n\n" + "Import container or virtual machine image.\n\n" + " -h --help Show this help\n" + " --version Show package version\n" + " --force Force creation of image\n" + " --image-root=PATH Image root directory\n" + " --read-only Create a read-only image\n\n" + "Commands:\n" + " tar FILE [NAME] Download a TAR image\n" + " raw FILE [NAME] Download a RAW image\n", + program_invocation_short_name); + + return 0; +} + +static int parse_argv(int argc, char *argv[]) { + + enum { + ARG_VERSION = 0x100, + ARG_FORCE, + ARG_IMAGE_ROOT, + ARG_READ_ONLY, + }; + + static const struct option options[] = { + { "help", no_argument, NULL, 'h' }, + { "version", no_argument, NULL, ARG_VERSION }, + { "force", no_argument, NULL, ARG_FORCE }, + { "image-root", required_argument, NULL, ARG_IMAGE_ROOT }, + { "read-only", no_argument, NULL, ARG_READ_ONLY }, + {} + }; + + int c; + + assert(argc >= 0); + assert(argv); + + while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) + + switch (c) { + + case 'h': + return help(0, NULL, NULL); + + case ARG_VERSION: + puts(PACKAGE_STRING); + puts(SYSTEMD_FEATURES); + return 0; + + case ARG_FORCE: + arg_force = true; + break; + + case ARG_IMAGE_ROOT: + arg_image_root = optarg; + break; + + case ARG_READ_ONLY: + arg_read_only = true; + break; + + case '?': + return -EINVAL; + + default: + assert_not_reached("Unhandled option"); + } + + return 1; +} + +static int import_main(int argc, char *argv[]) { + + static const Verb verbs[] = { + { "help", VERB_ANY, VERB_ANY, 0, help }, + { "tar", 2, 3, 0, import_tar }, + { "raw", 2, 3, 0, import_raw }, + {} + }; + + return dispatch_verb(argc, argv, verbs, NULL); +} + +int main(int argc, char *argv[]) { + int r; + + setlocale(LC_ALL, ""); + log_parse_environment(); + log_open(); + + r = parse_argv(argc, argv); + if (r <= 0) + goto finish; + + ignore_signals(SIGPIPE, -1); + + r = import_main(argc, argv); + +finish: + return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; +} |