1 | /*
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2 | * $Id$
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3 | *
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4 | * Code (c)2006 Bruno Cornec <bruno@mondorescue.org>
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5 | *
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6 | * Main file of mr_msg : a very small and simple
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7 | * library for messages management
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8 | *
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9 | * Provided under the GPLv2
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10 | */
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11 |
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12 | #ifndef _GNU_SOURCE
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13 | #define _GNU_SOURCE
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14 | #endif
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15 | #include <stdio.h>
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16 | #include <stdarg.h>
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17 | #include <stdlib.h>
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18 |
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19 | static int mr_loglevel = 0;
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20 | static char *mr_logfile = NULL;
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21 |
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22 | /* Cleanup function for messages */
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23 | void mr_msg_close(void) {
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24 | free(mr_logfile);
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25 | mr_logfile = NULL;
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26 | }
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27 |
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28 | /* Initialization function for messages */
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29 | void mr_msg_init(const char *configfile, int loglevel) {
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30 | FILE *fout = NULL;
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31 | int res = 0;
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32 |
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33 | asprintf(&mr_logfile,configfile);
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34 | if ((fout = fopen(mr_logfile, "w")) == NULL) {
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35 | fprintf(stderr,"Unable to write to %s\n",mr_logfile);
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36 | fprintf(stderr,"Logging desactivated\n");
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37 | mr_msg_close();
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38 | }
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39 | if ((res = fclose(fout)) != 0) {
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40 | fprintf(stderr,"Unable to close %s\n",mr_logfile);
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41 | }
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42 | mr_loglevel = loglevel;
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43 | }
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44 |
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45 | /*
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46 | * Function that log a message. Not called directly
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47 | * but through other functions
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48 | */
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49 | void _mr_msg(int debug, const char *file, const char *function, int line, const char *fmt, ...) {
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50 |
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51 | int i = 0;
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52 | int res = 0;
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53 | FILE *fout = NULL;
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54 | va_list args;
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55 |
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56 | if (mr_logfile == NULL) {
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57 | return;
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58 | }
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59 |
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60 | if (debug <= mr_loglevel) {
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61 | if ((fout = fopen(mr_logfile, "a")) == NULL) {
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62 | fprintf(stderr,"Unable to append to %s\n",mr_logfile);
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63 | return;
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64 | }
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65 | va_start(args,fmt);
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66 |
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67 | // add 2 spaces to distinguish log levels
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68 | if (debug > 0) {
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69 | for (i = 1; i < debug; i++)
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70 | fprintf(fout, " ");
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71 | fprintf(fout, "%s->%s#%d: ", file, function, line);
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72 | }
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73 | if (vfprintf(fout, fmt, args) < 0) {
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74 | fprintf(stderr,"Unable to print to %s\n",mr_logfile);
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75 | }
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76 |
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77 | fprintf(fout, "\n");
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78 | if ((res = fclose(fout)) != 0) {
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79 | fprintf(stderr,"Unable to close %s\n",mr_logfile);
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80 | }
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81 | va_end(args);
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82 | }
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83 | }
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84 |
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85 | void mr_msg(int level, const char *fmt, ...) {
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86 |
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87 | va_list args;
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88 |
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89 | va_start(args,fmt);
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90 | _mr_msg(level, __FILE__, __FUNCTION__, __LINE__, fmt, args);
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91 | va_end(args);
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92 | }
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