diff options
Diffstat (limited to 'src/id128/id128.c')
| -rw-r--r-- | src/id128/id128.c | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/src/id128/id128.c b/src/id128/id128.c new file mode 100644 index 0000000..06049e7 --- /dev/null +++ b/src/id128/id128.c @@ -0,0 +1,168 @@ +/* SPDX-License-Identifier: LGPL-2.1+ */ + +#include <getopt.h> +#include <stdio.h> + +#include "alloc-util.h" +#include "id128-print.h" +#include "main-func.h" +#include "pretty-print.h" +#include "util.h" +#include "verbs.h" + +static bool arg_pretty = false; +static sd_id128_t arg_app = {}; + +static int verb_new(int argc, char **argv, void *userdata) { + return id128_print_new(arg_pretty); +} + +static int verb_machine_id(int argc, char **argv, void *userdata) { + sd_id128_t id; + int r; + + if (sd_id128_is_null(arg_app)) + r = sd_id128_get_machine(&id); + else + r = sd_id128_get_machine_app_specific(arg_app, &id); + if (r < 0) + return log_error_errno(r, "Failed to get %smachine-ID: %m", + sd_id128_is_null(arg_app) ? "" : "app-specific "); + + return id128_pretty_print(id, arg_pretty); +} + +static int verb_boot_id(int argc, char **argv, void *userdata) { + sd_id128_t id; + int r; + + if (sd_id128_is_null(arg_app)) + r = sd_id128_get_boot(&id); + else + r = sd_id128_get_boot_app_specific(arg_app, &id); + if (r < 0) + return log_error_errno(r, "Failed to get %sboot-ID: %m", + sd_id128_is_null(arg_app) ? "" : "app-specific "); + + return id128_pretty_print(id, arg_pretty); +} + +static int verb_invocation_id(int argc, char **argv, void *userdata) { + sd_id128_t id; + int r; + + if (!sd_id128_is_null(arg_app)) + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), + "Verb \"invocation-id\" cannot be combined with --app-specific=."); + + r = sd_id128_get_invocation(&id); + if (r < 0) + return log_error_errno(r, "Failed to get invocation-ID: %m"); + + return id128_pretty_print(id, arg_pretty); +} + +static int help(void) { + _cleanup_free_ char *link = NULL; + int r; + + r = terminal_urlify_man("systemd-id128", "1", &link); + if (r < 0) + return log_oom(); + + printf("%s [OPTIONS...] {COMMAND} ...\n\n" + "Generate and print id128 strings.\n\n" + " -h --help Show this help\n" + " -p --pretty Generate samples of program code\n" + " -a --app-specific=ID Generate app-specific IDs\n" + "\nCommands:\n" + " new Generate a new id128 string\n" + " machine-id Print the ID of current machine\n" + " boot-id Print the ID of current boot\n" + " invocation-id Print the ID of current invocation\n" + " help Show this help\n" + "\nSee the %s for details.\n" + , program_invocation_short_name + , link + ); + + return 0; +} + +static int verb_help(int argc, char **argv, void *userdata) { + return help(); +} + +static int parse_argv(int argc, char *argv[]) { + enum { + ARG_VERSION = 0x100, + }; + + static const struct option options[] = { + { "help", no_argument, NULL, 'h' }, + { "version", no_argument, NULL, ARG_VERSION }, + { "app-specific", required_argument, NULL, 'a' }, + {}, + }; + + int c, r; + + assert(argc >= 0); + assert(argv); + + while ((c = getopt_long(argc, argv, "hpa:", options, NULL)) >= 0) + switch (c) { + + case 'h': + return help(); + + case ARG_VERSION: + return version(); + + case 'p': + arg_pretty = true; + break; + + case 'a': + r = sd_id128_from_string(optarg, &arg_app); + if (r < 0) + return log_error_errno(r, "Failed to parse \"%s\" as application-ID: %m", optarg); + break; + + case '?': + return -EINVAL; + + default: + assert_not_reached("Unhandled option"); + } + + return 1; +} + +static int id128_main(int argc, char *argv[]) { + static const Verb verbs[] = { + { "new", VERB_ANY, 1, 0, verb_new }, + { "machine-id", VERB_ANY, 1, 0, verb_machine_id }, + { "boot-id", VERB_ANY, 1, 0, verb_boot_id }, + { "invocation-id", VERB_ANY, 1, 0, verb_invocation_id }, + { "help", VERB_ANY, VERB_ANY, 0, verb_help }, + {} + }; + + return dispatch_verb(argc, argv, verbs, NULL); +} + +static int run(int argc, char *argv[]) { + int r; + + log_parse_environment(); + log_open(); + + r = parse_argv(argc, argv); + if (r <= 0) + return r; + + return id128_main(argc, argv); +} + +DEFINE_MAIN_FUNCTION(run); |