src/timesync/timesyncd-conf.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 /***
   3   This file is part of systemd.
   4
   5   Copyright 2014 Kay Sievers, Lennart Poettering
   6
   7   systemd is free software; you can redistribute it and/or modify it
   8   under the terms of the GNU Lesser General Public License as published by
   9   the Free Software Foundation; either version 2.1 of the License, or
  10   (at your option) any later version.
  11
  12   systemd is distributed in the hope that it will be useful, but
  13   WITHOUT ANY WARRANTY; without even the implied warranty of
  14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  15   Lesser General Public License for more details.
  16
  17   You should have received a copy of the GNU Lesser General Public License
  18   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  19 ***/
  20
  21 #include "alloc-util.h"
  22 #include "def.h"
  23 #include "extract-word.h"
  24 #include "string-util.h"
  25 #include "timesyncd-conf.h"
  26 #include "timesyncd-manager.h"
  27 #include "timesyncd-server.h"
  28
  29 int manager_parse_server_string(Manager *m, ServerType type, const char *string) {
  30         ServerName *first;
  31         int r;
  32
  33         assert(m);
  34         assert(string);
  35
  36         first = type == SERVER_FALLBACK ? m->fallback_servers : m->system_servers;
  37
  38         if (type == SERVER_FALLBACK)
  39                  m->have_fallbacks = true;
  40
  41         for (;;) {
  42                 _cleanup_free_ char *word = NULL;
  43                 bool found = false;
  44                 ServerName *n;
  45
  46                 r = extract_first_word(&string, &word, NULL, 0);
  47                 if (r < 0)
  48                         return log_error_errno(r, "Failed to parse timesyncd server syntax \"%s\": %m", string);
  49                 if (r == 0)
  50                         break;
  51
  52                 /* Filter out duplicates */
  53                 LIST_FOREACH(names, n, first)
  54                         if (streq_ptr(n->string, word)) {
  55                                 found = true;
  56                                 break;
  57                         }
  58
  59                 if (found)
  60                         continue;
  61
  62                 r = server_name_new(m, NULL, type, word);
  63                 if (r < 0)
  64                         return r;
  65         }
  66
  67         return 0;
  68 }
  69
  70 int manager_parse_fallback_string(Manager *m, const char *string) {
  71         if (m->have_fallbacks)
  72                 return 0;
  73
  74         return manager_parse_server_string(m, SERVER_FALLBACK, string);
  75 }
  76
  77 int config_parse_servers(
  78                 const char *unit,
  79                 const char *filename,
  80                 unsigned line,
  81                 const char *section,
  82                 unsigned section_line,
  83                 const char *lvalue,
  84                 int ltype,
  85                 const char *rvalue,
  86                 void *data,
  87                 void *userdata) {
  88
  89         Manager *m = userdata;
  90         int r;
  91
  92         assert(filename);
  93         assert(lvalue);
  94         assert(rvalue);
  95
  96         if (isempty(rvalue))
  97                 manager_flush_server_names(m, ltype);
  98         else {
  99                 r = manager_parse_server_string(m, ltype, rvalue);
 100                 if (r < 0) {
 101                         log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse NTP server string '%s'. Ignoring.", rvalue);
 102                         return 0;
 103                 }
 104         }
 105
 106         return 0;
 107 }
 108
 109 int manager_parse_config_file(Manager *m) {
 110         int r;
 111
 112         assert(m);
 113
 114         r = config_parse_many_nulstr(PKGSYSCONFDIR "/timesyncd.conf",
 115                                      CONF_PATHS_NULSTR("systemd/timesyncd.conf.d"),
 116                                      "Time\0",
 117                                      config_item_perf_lookup, timesyncd_gperf_lookup,
 118                                      CONFIG_PARSE_WARN, m);
 119         if (r < 0)
 120                 return r;
 121
 122         if (m->poll_interval_min_usec < 16 * USEC_PER_SEC) {
 123                 log_warning("Invalid PollIntervalMinSec=. Using default value.");
 124                 m->poll_interval_min_usec = NTP_POLL_INTERVAL_MIN_USEC;
 125         }
 126
 127         if (m->poll_interval_max_usec < m->poll_interval_min_usec) {
 128                 log_warning("PollIntervalMaxSec= is smaller than PollIntervalMinSec=. Using default value.");
 129                 m->poll_interval_max_usec = MAX(NTP_POLL_INTERVAL_MAX_USEC, m->poll_interval_min_usec * 32);
 130         }
 131
 132         return r;
 133 }