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annotate extensions/dbg_loglevel/dbg_loglevel.c @ 1345:51a0521cd065

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dbg_loglevel: new extension that allows changing the log level at runtime
author Thomas Klausner <tk@giga.or.at>
date Sun, 12 May 2019 10:35:46 +0200
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1 /*********************************************************************************************************
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2 * Software License Agreement (BSD License) *
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3 * Author: Thomas Klausner <tk@giga.or.at> *
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4 * *
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5 * Copyright (c) 2019, Thomas Klausner *
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6 * All rights reserved. *
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7 * *
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8 * Written under contract by Effortel Technologies SA, http://effortel.com/ *
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9 * *
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10 * Redistribution and use of this software in source and binary forms, with or without modification, are *
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11 * permitted provided that the following conditions are met: *
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12 * *
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13 * * Redistributions of source code must retain the above *
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14 * copyright notice, this list of conditions and the *
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15 * following disclaimer. *
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16 * *
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17 * * Redistributions in binary form must reproduce the above *
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18 * copyright notice, this list of conditions and the *
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19 * following disclaimer in the documentation and/or other *
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20 * materials provided with the distribution. *
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21 * *
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22 * * Neither the name of the WIDE Project or NICT nor the *
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23 * names of its contributors may be used to endorse or *
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24 * promote products derived from this software without *
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25 * specific prior written permission of WIDE Project and *
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26 * NICT. *
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27 * *
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28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED *
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29 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A *
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30 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR *
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31 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT *
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32 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS *
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33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR *
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34 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF *
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35 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. *
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36 *********************************************************************************************************/
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37
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38 #include <signal.h>
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39
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40 /* See doc/dbg_loglevel.conf.sample for more details about the features of this extension */
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41 #include "dbg_loglevel.h"
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42
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43 static char *config_file = NULL;
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44 #define MODULE_NAME "dbg_loglevel"
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46 static void sig_hdlr(void)
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47 {
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48 int old_log_level;
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49
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50 old_log_level = fd_g_debug_lvl;
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51 if (dbg_loglevel_conf_handle(config_file) != 0) {
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52 fd_log_error("%s: error during config file reload, restoring previous value", MODULE_NAME);
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53 fd_g_debug_lvl = old_log_level;
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54 }
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55 fd_log_notice("%s: reloaded configuration, log level now %d", MODULE_NAME, fd_g_debug_lvl);
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56 }
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57
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58 /* entry point */
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59 static int dbg_loglevel_entry(char * conffile)
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60 {
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61 TRACE_ENTRY("%p", conffile);
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62
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63 config_file = conffile;
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64
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65 /* default set by main program */
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66 /* fd_g_debug_lvl = FD_LOG_NOTICE; */
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67
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68 /* Parse the configuration file */
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69 CHECK_FCT(dbg_loglevel_conf_handle(config_file));
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70
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71 /* Register reload callback */
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72 CHECK_FCT(fd_event_trig_regcb(SIGUSR1, MODULE_NAME, sig_hdlr));
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73
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74 fd_log_notice("Extension 'Loglevel' initialized with log level %d", fd_g_debug_lvl);
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75
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76 /* We're done */
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77 return 0;
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78 }
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79
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80 /* Unload */
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81 void fd_ext_fini(void)
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82 {
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83 TRACE_ENTRY();
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84
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85 /* Nothing to do */
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86 return ;
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87 }
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88
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89 EXTENSION_ENTRY(MODULE_NAME, dbg_loglevel_entry);
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