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annotate libnumdb/refresh.c @ 15:a24f0794ab4d default tip

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INSTALL: document the new way
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 21 May 2024 00:29:21 +0000
parents 6534965175dd
children
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1 /*
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2 * Long-running ThemWi daemon processes need to be able to pick up updates
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3 * to the number database without being restarted. Whenever they need to
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4 * consult the number db when handling a new call setup or equivalent,
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5 * they will call refresh_number_db(), which does a stat on the file,
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6 * followed by a re-read if the file has changed.
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7 */
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8
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9 #include <sys/types.h>
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10 #include <sys/stat.h>
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11 #include <stdio.h>
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12 #include <stdint.h>
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13 #include <stdlib.h>
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14 #include <syslog.h>
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15
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16 #include <themwi/nanp/number_db_v2.h>
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17 #include <themwi/nanp/number_lookup.h>
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18
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19 extern const char numdb_pathname[];
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20 extern struct stat numdb_file_stat;
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21 extern struct owned_number_rec *numdb_owned_numbers;
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22 extern struct short_number_rec *numdb_short_numbers;
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23
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24 int refresh_number_db(void)
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25 {
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26 int rc;
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27 struct stat st;
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28
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29 rc = stat(numdb_pathname, &st);
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30 if (rc < 0) {
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31 syslog(LOG_CRIT, "unable to stat %s for refresh: %m",
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32 numdb_pathname);
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33 return(-1);
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34 }
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35 if (st.st_mtime == numdb_file_stat.st_mtime &&
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36 st.st_ctime == numdb_file_stat.st_ctime &&
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37 st.st_size == numdb_file_stat.st_size)
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38 return(0);
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39 if (numdb_owned_numbers) {
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40 free(numdb_owned_numbers);
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41 numdb_owned_numbers = 0;
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42 }
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43 if (numdb_short_numbers) {
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44 free(numdb_short_numbers);
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45 numdb_short_numbers = 0;
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46 }
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47 rc = read_number_db();
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48 if (rc < 0) {
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49 syslog(LOG_CRIT, "error reading %s on refresh!",
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50 numdb_pathname);
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51 exit(1);
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52 }
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53 return(1);
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54 }