/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ /*** This file is part of systemd. Copyright 2014 Michael Biebl 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 <stdio.h> #include <stdlib.h> #include <getopt.h> #include "log.h" #include "unit-name.h" #include "build.h" #include "strv.h" static enum { ACTION_ESCAPE, ACTION_UNESCAPE, ACTION_MANGLE } arg_action = ACTION_ESCAPE; static const char *arg_suffix = NULL; static const char *arg_template = NULL; static bool arg_path = false; static void help(void) { printf("%s [OPTIONS...] [NAME...]\n\n" "Show system and user paths.\n\n" " -h --help Show this help\n" " --version Show package version\n" " --suffix=SUFFIX Unit suffix to append to escaped strings\n" " --template=TEMPLATE Insert strings as instance into template\n" " -u --unescape Unescape strings\n" " -m --mangle Mangle strings\n" " -p --path When escaping/unescaping assume the string is a path\n" , program_invocation_short_name); } static int parse_argv(int argc, char *argv[]) { enum { ARG_VERSION = 0x100, ARG_SUFFIX, ARG_TEMPLATE }; static const struct option options[] = { { "help", no_argument, NULL, 'h' }, { "version", no_argument, NULL, ARG_VERSION }, { "suffix", required_argument, NULL, ARG_SUFFIX }, { "template", required_argument, NULL, ARG_TEMPLATE }, { "unescape", no_argument, NULL, 'u' }, { "mangle", no_argument, NULL, 'm' }, { "path", no_argument, NULL, 'p' }, {} }; int c; assert(argc >= 0); assert(argv); while ((c = getopt_long(argc, argv, "hump", options, NULL)) >= 0) switch (c) { case 'h': help(); return 0; case ARG_VERSION: puts(PACKAGE_STRING); puts(SYSTEMD_FEATURES); return 0; case ARG_SUFFIX: if (unit_type_from_string(optarg) < 0) { log_error("Invalid unit suffix type %s.", optarg); return -EINVAL; } arg_suffix = optarg; break; case ARG_TEMPLATE: if (!unit_name_is_valid(optarg, UNIT_NAME_TEMPLATE)) { log_error("Template name %s is not valid.", optarg); return -EINVAL; } arg_template = optarg; break; case 'u': arg_action = ACTION_UNESCAPE; break; case 'm': arg_action = ACTION_MANGLE; break; case 'p': arg_path = true; break; case '?': return -EINVAL; default: assert_not_reached("Unhandled option"); } if (optind >= argc) { log_error("Not enough arguments."); return -EINVAL; } if (arg_template && arg_suffix) { log_error("--suffix= and --template= may not be combined."); return -EINVAL; } if ((arg_template || arg_suffix) && arg_action != ACTION_ESCAPE) { log_error("--suffix= and --template= are not compatible with --unescape or --mangle."); return -EINVAL; } if (arg_path && !IN_SET(arg_action, ACTION_ESCAPE, ACTION_UNESCAPE)) { log_error("--path may not be combined with --mangle."); return -EINVAL; } return 1; } int main(int argc, char *argv[]) { char **i; int r; log_parse_environment(); log_open(); r = parse_argv(argc, argv); if (r <= 0) goto finish; STRV_FOREACH(i, argv + optind) { _cleanup_free_ char *e = NULL; switch (arg_action) { case ACTION_ESCAPE: if (arg_path) { r = unit_name_path_escape(*i, &e); if (r < 0) { log_error_errno(r, "Failed to escape string: %m"); goto finish; } } else { e = unit_name_escape(*i); if (!e) { r = log_oom(); goto finish; } } if (arg_template) { char *x; r = unit_name_replace_instance(arg_template, e, &x); if (r < 0) { log_error_errno(r, "Failed to replace instance: %m"); goto finish; } free(e); e = x; } else if (arg_suffix) { char *x; x = strjoin(e, ".", arg_suffix, NULL); if (!x) { r = log_oom(); goto finish; } free(e); e = x; } break; case ACTION_UNESCAPE: if (arg_path) r = unit_name_path_unescape(*i, &e); else r = unit_name_unescape(*i, &e); if (r < 0) { log_error_errno(r, "Failed to unescape string: %m"); goto finish; } break; case ACTION_MANGLE: r = unit_name_mangle(*i, UNIT_NAME_NOGLOB, &e); if (r < 0) { log_error_errno(r, "Failed to mangle name: %m"); goto finish; } break; } if (i != argv+optind) fputc(' ', stdout); fputs(e, stdout); } fputc('\n', stdout); finish: return r <= 0 ? EXIT_FAILURE : EXIT_SUCCESS; }