146 lines
3.9 KiB
C
146 lines
3.9 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 2010 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 "alloc-util.h"
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#include "extract-word.h"
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#include "fileio.h"
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#include "macro.h"
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#include "parse-util.h"
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#include "proc-cmdline.h"
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#include "process-util.h"
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#include "string-util.h"
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#include "util.h"
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#include "virt.h"
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int proc_cmdline(char **ret) {
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assert(ret);
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if (detect_container() > 0)
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return get_process_cmdline(1, 0, false, ret);
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else
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return read_one_line_file("/proc/cmdline", ret);
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}
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int parse_proc_cmdline(int (*parse_item)(const char *key, const char *value)) {
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_cleanup_free_ char *line = NULL;
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const char *p;
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int r;
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assert(parse_item);
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r = proc_cmdline(&line);
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if (r < 0)
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return r;
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p = line;
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for (;;) {
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_cleanup_free_ char *word = NULL;
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char *value = NULL;
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r = extract_first_word(&p, &word, NULL, EXTRACT_QUOTES|EXTRACT_RELAX);
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if (r < 0)
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return r;
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if (r == 0)
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break;
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/* Filter out arguments that are intended only for the
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* initrd */
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if (!in_initrd() && startswith(word, "rd."))
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continue;
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value = strchr(word, '=');
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if (value)
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*(value++) = 0;
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r = parse_item(word, value);
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if (r < 0)
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return r;
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}
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return 0;
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}
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int get_proc_cmdline_key(const char *key, char **value) {
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_cleanup_free_ char *line = NULL, *ret = NULL;
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bool found = false;
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const char *p;
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int r;
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assert(key);
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r = proc_cmdline(&line);
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if (r < 0)
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return r;
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p = line;
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for (;;) {
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_cleanup_free_ char *word = NULL;
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const char *e;
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r = extract_first_word(&p, &word, NULL, EXTRACT_QUOTES|EXTRACT_RELAX);
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if (r < 0)
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return r;
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if (r == 0)
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break;
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/* Filter out arguments that are intended only for the
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* initrd */
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if (!in_initrd() && startswith(word, "rd."))
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continue;
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if (value) {
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e = startswith(word, key);
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if (!e)
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continue;
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r = free_and_strdup(&ret, e);
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if (r < 0)
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return r;
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found = true;
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} else {
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if (streq(word, key))
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found = true;
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}
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}
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if (value) {
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*value = ret;
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ret = NULL;
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}
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return found;
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}
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int shall_restore_state(void) {
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_cleanup_free_ char *value = NULL;
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int r;
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r = get_proc_cmdline_key("systemd.restore_state=", &value);
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if (r < 0)
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return r;
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if (r == 0)
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return true;
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return parse_boolean(value) != 0;
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}
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