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annotate mod_debug_traceback/mod_debug_traceback.lua @ 5850:0358fcf14cd6

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mod_debug_traceback: Remove direct POSIX signal handling, require Prosody 0.12+ Hooking an event is safer than directly hooking signals For context see Prosody trunk rev 69faf3552d52
author Kim Alvefur <zash@zash.se>
date Sat, 02 Mar 2024 14:42:27 +0100
parents 02292b892fce
children
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1 module:set_global();
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2
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3 local traceback = require "util.debug".traceback;
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4 local pposix = require "util.pposix";
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5 local os_date = os.date;
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6 local render_filename = require "util.interpolation".new("%b{}", function (s) return s; end, {
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7 yyyymmdd = function (t)
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8 return os_date("%Y%m%d", t);
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9 end;
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10 hhmmss = function (t)
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11 return os_date("%H%M%S", t);
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12 end;
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13 });
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14
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15 local count = 0;
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16
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17 local function get_filename(filename_template)
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18 filename_template = filename_template;
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19 return render_filename(filename_template, {
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20 paths = prosody.paths;
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21 pid = pposix.getpid();
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22 count = count;
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23 time = os.time();
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24 });
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25 end
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26
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27 local default_filename_template = "{paths.data}/traceback-{pid}-{count}.log";
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28 local filename_template = module:get_option_string("debug_traceback_filename", default_filename_template);
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29 local signal_name = module:get_option_string("debug_traceback_signal", "SIGUSR1");
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30
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31 function dump_traceback()
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32 module:log("info", "Received %s, writing traceback", signal_name);
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33
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34 local tb = traceback();
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35 module:fire_event("debug_traceback/triggered", { traceback = tb });
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36
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37 local f, err = io.open(get_filename(filename_template), "a+");
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38 if not f then
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39 module:log("error", "Unable to write traceback: %s", err);
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40 return;
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41 end
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42 f:write("-- Traceback generated at ", os.date("%b %d %H:%M:%S"), " --\n");
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43 f:write(tb, "\n");
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44 f:write("-- End of traceback --\n");
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45 f:close();
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46 count = count + 1;
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47 end
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48
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49 module:hook("signal/"..signal_name, dump_traceback);