238 lines
7.6 KiB
C
238 lines
7.6 KiB
C
/***
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This file is part of systemd.
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Copyright 2014 Michael Biebl
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <getopt.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "alloc-util.h"
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#include "log.h"
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#include "string-util.h"
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#include "strv.h"
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#include "unit-name.h"
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static enum {
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ACTION_ESCAPE,
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ACTION_UNESCAPE,
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ACTION_MANGLE
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} arg_action = ACTION_ESCAPE;
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static const char *arg_suffix = NULL;
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static const char *arg_template = NULL;
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static bool arg_path = false;
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static void help(void) {
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printf("%s [OPTIONS...] [NAME...]\n\n"
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"Show system and user paths.\n\n"
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" -h --help Show this help\n"
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" --version Show package version\n"
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" --suffix=SUFFIX Unit suffix to append to escaped strings\n"
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" --template=TEMPLATE Insert strings as instance into template\n"
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" -u --unescape Unescape strings\n"
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" -m --mangle Mangle strings\n"
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" -p --path When escaping/unescaping assume the string is a path\n"
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, program_invocation_short_name);
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}
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static int parse_argv(int argc, char *argv[]) {
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enum {
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ARG_VERSION = 0x100,
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ARG_SUFFIX,
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ARG_TEMPLATE
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};
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static const struct option options[] = {
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{ "help", no_argument, NULL, 'h' },
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{ "version", no_argument, NULL, ARG_VERSION },
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{ "suffix", required_argument, NULL, ARG_SUFFIX },
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{ "template", required_argument, NULL, ARG_TEMPLATE },
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{ "unescape", no_argument, NULL, 'u' },
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{ "mangle", no_argument, NULL, 'm' },
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{ "path", no_argument, NULL, 'p' },
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{}
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};
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int c;
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assert(argc >= 0);
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assert(argv);
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while ((c = getopt_long(argc, argv, "hump", options, NULL)) >= 0)
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switch (c) {
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case 'h':
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help();
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return 0;
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case ARG_VERSION:
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return version();
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case ARG_SUFFIX:
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if (unit_type_from_string(optarg) < 0) {
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log_error("Invalid unit suffix type %s.", optarg);
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return -EINVAL;
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}
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arg_suffix = optarg;
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break;
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case ARG_TEMPLATE:
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if (!unit_name_is_valid(optarg, UNIT_NAME_TEMPLATE)) {
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log_error("Template name %s is not valid.", optarg);
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return -EINVAL;
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}
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arg_template = optarg;
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break;
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case 'u':
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arg_action = ACTION_UNESCAPE;
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break;
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case 'm':
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arg_action = ACTION_MANGLE;
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break;
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case 'p':
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arg_path = true;
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break;
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case '?':
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return -EINVAL;
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default:
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assert_not_reached("Unhandled option");
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}
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if (optind >= argc) {
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log_error("Not enough arguments.");
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return -EINVAL;
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}
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if (arg_template && arg_suffix) {
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log_error("--suffix= and --template= may not be combined.");
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return -EINVAL;
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}
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if ((arg_template || arg_suffix) && arg_action != ACTION_ESCAPE) {
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log_error("--suffix= and --template= are not compatible with --unescape or --mangle.");
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return -EINVAL;
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}
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if (arg_path && !IN_SET(arg_action, ACTION_ESCAPE, ACTION_UNESCAPE)) {
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log_error("--path may not be combined with --mangle.");
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return -EINVAL;
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}
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return 1;
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}
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int main(int argc, char *argv[]) {
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char **i;
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int r;
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log_parse_environment();
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log_open();
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r = parse_argv(argc, argv);
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if (r <= 0)
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goto finish;
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STRV_FOREACH(i, argv + optind) {
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_cleanup_free_ char *e = NULL;
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switch (arg_action) {
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case ACTION_ESCAPE:
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if (arg_path) {
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r = unit_name_path_escape(*i, &e);
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if (r < 0) {
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log_error_errno(r, "Failed to escape string: %m");
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goto finish;
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}
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} else {
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e = unit_name_escape(*i);
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if (!e) {
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r = log_oom();
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goto finish;
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}
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}
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if (arg_template) {
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char *x;
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r = unit_name_replace_instance(arg_template, e, &x);
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if (r < 0) {
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log_error_errno(r, "Failed to replace instance: %m");
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goto finish;
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}
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free(e);
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e = x;
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} else if (arg_suffix) {
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char *x;
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x = strjoin(e, ".", arg_suffix);
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if (!x) {
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r = log_oom();
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goto finish;
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}
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free(e);
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e = x;
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}
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break;
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case ACTION_UNESCAPE:
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if (arg_path)
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r = unit_name_path_unescape(*i, &e);
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else
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r = unit_name_unescape(*i, &e);
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if (r < 0) {
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log_error_errno(r, "Failed to unescape string: %m");
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goto finish;
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}
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break;
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case ACTION_MANGLE:
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r = unit_name_mangle(*i, UNIT_NAME_NOGLOB, &e);
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if (r < 0) {
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log_error_errno(r, "Failed to mangle name: %m");
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goto finish;
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}
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break;
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}
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if (i != argv+optind)
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fputc(' ', stdout);
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fputs(e, stdout);
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}
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fputc('\n', stdout);
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finish:
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return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
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}
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