a095315b3c
basic/ can be used by everything
cannot use anything outside of basic/
libsystemd/ can use basic/
cannot use shared/
shared/ can use libsystemd/
91 lines
2.6 KiB
C
91 lines
2.6 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2014 Lennart Poettering
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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 "util.h"
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#include "verbs.h"
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int dispatch_verb(int argc, char *argv[], const Verb verbs[], void *userdata) {
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const Verb *verb;
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const char *name;
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unsigned i;
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int left;
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assert(verbs);
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assert(verbs[0].dispatch);
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assert(argc >= 0);
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assert(argv);
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assert(argc >= optind);
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left = argc - optind;
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name = argv[optind];
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for (i = 0;; i++) {
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bool found;
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/* At the end of the list? */
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if (!verbs[i].dispatch) {
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if (name)
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log_error("Unknown operation %s.", name);
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else
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log_error("Requires operation parameter.");
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return -EINVAL;
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}
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if (name)
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found = streq(name, verbs[i].verb);
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else
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found = !!(verbs[i].flags & VERB_DEFAULT);
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if (found) {
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verb = &verbs[i];
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break;
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}
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}
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assert(verb);
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if (!name)
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left = 1;
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if (verb->min_args != VERB_ANY &&
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(unsigned) left < verb->min_args) {
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log_error("Too few arguments.");
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return -EINVAL;
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}
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if (verb->max_args != VERB_ANY &&
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(unsigned) left > verb->max_args) {
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log_error("Too many arguments.");
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return -EINVAL;
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}
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if (name)
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return verb->dispatch(left, argv + optind, userdata);
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else {
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char* fake[2] = {
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(char*) verb->verb,
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NULL
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};
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return verb->dispatch(1, fake, userdata);
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}
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}
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