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https://github.com/pygos/init.git
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90 lines
2.1 KiB
C
90 lines
2.1 KiB
C
/* SPDX-License-Identifier: GPL-3.0-or-later */
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/*
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* Copyright (C) 2018 - David Oberhollenzer
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include "servicecmd.h"
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#include "service.h"
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#include "config.h"
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#include "util.h"
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command_t *commands;
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extern char *__progname;
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void usage(int status)
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{
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FILE *stream = (status == EXIT_SUCCESS ? stdout : stderr);
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int padd = 0, len;
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command_t *cmd;
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fprintf(stream, "usage: %s <command> [args...]\n\n"
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"Available commands:\n\n", __progname);
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for (cmd = commands; cmd != NULL; cmd = cmd->next) {
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len = strlen(cmd->cmd);
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padd = len > padd ? len : padd;
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}
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for (cmd = commands; cmd != NULL; cmd = cmd->next) {
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fprintf(stream, "%*s - %s\n",
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(int)padd + 1, cmd->cmd, cmd->s_desc);
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}
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fprintf(stream, "\nTry `%s help <command>' for more information "
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"on a specific command\n", __progname);
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exit(status);
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}
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void tell_read_help(const char *cmd)
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{
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fprintf(stderr, "Try `%s help %s' for more information.\n",
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__progname, cmd);
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}
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int check_arguments(const char *cmd, int argc, int minc, int maxc)
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{
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if (argc >= minc && argc <= maxc)
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return 0;
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fprintf(stderr, "Too %s arguments for `%s'\n",
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argc > maxc ? "many" : "few", cmd);
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tell_read_help(cmd);
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return -1;
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}
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int main(int argc, char **argv)
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{
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command_t *cmd;
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if (argc < 2)
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usage(EXIT_SUCCESS);
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for (cmd = commands; cmd != NULL; cmd = cmd->next) {
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if (!strcmp(cmd->cmd, argv[1])) {
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return cmd->run_cmd(argc - 1, argv + 1);
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}
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}
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fprintf(stderr, "Unknown command '%s'\n\n", argv[1]);
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usage(EXIT_FAILURE);
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}
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