601185b43d
getopt is usually good at printing out a nice error message when commandline options are invalid. It distinguishes between an unknown option and a known option with a missing arg. It is better to let it do its job and not use opterr=0 unless we actually want to suppress messages. So remove opterr=0 in the few places where it wasn't really useful. When an error in options is encountered, we should not print a lengthy help() and overwhelm the user, when we know precisely what is wrong with the commandline. In addition, since help() prints to stdout, it should not be used except when requested with -h or --help. Also, simplify things here and there.
145 lines
4.4 KiB
C
145 lines
4.4 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/*
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* Copyright (C) 2007-2012 Kay Sievers <kay@vrfy.org>
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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 2 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 <http://www.gnu.org/licenses/>.
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*/
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#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stddef.h>
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#include <string.h>
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#include <errno.h>
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#include <getopt.h>
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#include "udev.h"
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void udev_main_log(struct udev *udev, int priority,
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const char *file, int line, const char *fn,
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const char *format, va_list args) {
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log_metav(priority, file, line, fn, format, args);
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}
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static int adm_version(struct udev *udev, int argc, char *argv[]) {
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printf("%s\n", VERSION);
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return 0;
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}
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static const struct udevadm_cmd udevadm_version = {
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.name = "version",
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.cmd = adm_version,
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};
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static int adm_help(struct udev *udev, int argc, char *argv[]);
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static const struct udevadm_cmd udevadm_help = {
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.name = "help",
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.cmd = adm_help,
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};
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static const struct udevadm_cmd *udevadm_cmds[] = {
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&udevadm_info,
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&udevadm_trigger,
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&udevadm_settle,
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&udevadm_control,
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&udevadm_monitor,
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&udevadm_hwdb,
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&udevadm_test,
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&udevadm_test_builtin,
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&udevadm_version,
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&udevadm_help,
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};
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static int adm_help(struct udev *udev, int argc, char *argv[]) {
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unsigned int i;
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fprintf(stderr, "Usage: udevadm [--help] [--version] [--debug] COMMAND [COMMAND OPTIONS]\n");
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for (i = 0; i < ELEMENTSOF(udevadm_cmds); i++)
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if (udevadm_cmds[i]->help != NULL)
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printf(" %-12s %s\n", udevadm_cmds[i]->name, udevadm_cmds[i]->help);
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fprintf(stderr, "\n");
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return 0;
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}
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static int run_command(struct udev *udev, const struct udevadm_cmd *cmd, int argc, char *argv[]) {
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if (cmd->debug)
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log_set_max_level(LOG_DEBUG);
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log_debug("calling: %s", cmd->name);
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return cmd->cmd(udev, argc, argv);
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}
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int main(int argc, char *argv[]) {
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struct udev *udev;
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static const struct option options[] = {
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{ "debug", no_argument, NULL, 'd' },
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{ "help", no_argument, NULL, 'h' },
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{ "version", no_argument, NULL, 'V' },
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{}
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};
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const char *command;
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unsigned int i;
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int rc = 1, c;
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udev = udev_new();
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if (udev == NULL)
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goto out;
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log_parse_environment();
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log_open();
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udev_set_log_fn(udev, udev_main_log);
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label_init("/dev");
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while ((c = getopt_long(argc, argv, "+dhV", options, NULL)) >= 0)
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switch (c) {
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case 'd':
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log_set_max_level(LOG_DEBUG);
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udev_set_log_priority(udev, LOG_DEBUG);
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break;
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case 'h':
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rc = adm_help(udev, argc, argv);
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goto out;
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case 'V':
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rc = adm_version(udev, argc, argv);
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goto out;
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default:
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goto out;
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}
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command = argv[optind];
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if (command != NULL)
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for (i = 0; i < ELEMENTSOF(udevadm_cmds); i++)
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if (streq(udevadm_cmds[i]->name, command)) {
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argc -= optind;
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argv += optind;
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/* we need '0' here to reset the internal state */
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optind = 0;
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rc = run_command(udev, udevadm_cmds[i], argc, argv);
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goto out;
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}
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fprintf(stderr, "%s: missing or unknown command", program_invocation_short_name);
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rc = 2;
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out:
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label_finish();
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udev_unref(udev);
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log_close();
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return rc;
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}
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