diff options
Diffstat (limited to 'src/import/import.c')
| -rw-r--r-- | src/import/import.c | 213 |
1 files changed, 213 insertions, 0 deletions
diff --git a/src/import/import.c b/src/import/import.c new file mode 100644 index 0000000000..9bade38c3a --- /dev/null +++ b/src/import/import.c @@ -0,0 +1,213 @@ +/*-*- 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 <getopt.h> + +#include "sd-event.h" +#include "event-util.h" +#include "verbs.h" +#include "build.h" +#include "import-dck.h" + +static bool arg_force = false; + +static void on_finished(DckImport *import, int error, void *userdata) { + sd_event *event = userdata; + assert(import); + + if (error == 0) + log_info("Operation completed successfully."); + else + log_info_errno(error, "Operation failed: %m"); + + sd_event_exit(event, error); +} + +static int pull_dck(int argc, char *argv[], void *userdata) { + _cleanup_(dck_import_unrefp) DckImport *import = NULL; + _cleanup_event_unref_ sd_event *event = NULL; + const char *name, *tag, *local; + int r; + + tag = strchr(argv[1], ':'); + if (tag) { + name = strndupa(argv[1], tag - argv[1]); + tag++; + } else { + name = argv[1]; + tag = "latest"; + } + + if (argc >= 3) + local = argv[2]; + else { + local = strchr(name, '/'); + if (local) + local++; + else + local = name; + } + + if (streq(local, "-") || isempty(local)) + local = NULL; + + if (!dck_name_is_valid(name)) { + log_error("Remote name '%s' is not valid.", name); + return -EINVAL; + } + + if (!dck_tag_is_valid(tag)) { + log_error("Tag name '%s' is not valid.", tag); + return -EINVAL; + } + + if (local) { + const char *p; + + if (!machine_name_is_valid(tag)) { + log_error("Local image name '%s' is not valid.", local); + return -EINVAL; + } + + p = strappenda("/var/lib/container/", local); + if (laccess(p, F_OK) >= 0) { + if (!arg_force) { + log_info("Image '%s' already exists.", local); + return 0; + } + } else if (errno != ENOENT) + return log_error_errno(errno, "Can't check if image '%s' already exists: %m", local); + + log_info("Pulling '%s' with tag '%s', saving as '%s'.", name, tag, local); + } else + log_info("Pulling '%s' with tag '%s'.", name, tag); + + 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, NULL, NULL); + sd_event_add_signal(event, NULL, SIGINT, NULL, NULL); + + r = dck_import_new(&import, event, on_finished, event); + if (r < 0) + return log_error_errno(r, "Failed to allocate importer: %m"); + + r = dck_import_pull(import, name, tag, local, arg_force); + if (r < 0) + return log_error_errno(r, "Failed to pull 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 0; +} + +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\n" + "Commands:\n" + " pull-dck REMOTE [NAME] Download an image\n", + program_invocation_short_name); + + return 0; +} + +static int parse_argv(int argc, char *argv[]) { + + enum { + ARG_VERSION = 0x100, + ARG_FORCE, + }; + + static const struct option options[] = { + { "help", no_argument, NULL, 'h' }, + { "version", no_argument, NULL, ARG_VERSION }, + { "force", no_argument, NULL, ARG_FORCE }, + {} + }; + + int c; + + assert(argc >= 0); + assert(argv); + + while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) + + switch (c) { + + case 'h': + return help(argc, argv, NULL); + + case ARG_VERSION: + puts(PACKAGE_STRING); + puts(SYSTEMD_FEATURES); + return 0; + + case ARG_FORCE: + arg_force = true; + break; + + case '?': + return -EINVAL; + + default: + assert_not_reached("Unhandled option"); + } + + return 1; +} + +static int import_main(int argc, char *argv[]) { + + const Verb verbs[] = { + { "help", VERB_ANY, VERB_ANY, 0, help }, + { "pull-dck", 2, 3, 0, pull_dck }, + {} + }; + + 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; + + r = import_main(argc, argv); + +finish: + return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; +} |