| 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 | /*
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| 23 | * This function is in the lowest part of the tree
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| 24 | * It should not depend on any other function of the mr lib
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| 25 | */
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| 26 |
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| 27 | /* Cleanup function for messages */
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| 28 | void mr_msg_close(void) {
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| 29 | free(mr_logfile);
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| 30 | mr_logfile = NULL;
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| 31 | mr_loglevel = 0;
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| 32 | }
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| 33 |
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| 34 | /* Function allowing to change loglevel after init */
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| 35 | void mr_msg_loglevel(int loglevel) {
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| 36 |
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| 37 | mr_loglevel = loglevel;
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| 38 | }
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| 39 |
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| 40 | /* Initialization function for messages */
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| 41 | void mr_msg_init(const char *logfile, int loglevel) {
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| 42 | FILE *fout = NULL;
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| 43 | int res = 0;
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| 44 |
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| 45 | asprintf(&mr_logfile,logfile);
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| 46 | if ((fout = fopen(mr_logfile, "w")) == NULL) {
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| 47 | fprintf(stderr,"Unable to write to %s\n",mr_logfile);
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| 48 | fprintf(stderr,"Logging desactivated\n");
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| 49 | mr_msg_close();
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| 50 | }
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| 51 | if ((res = fclose(fout)) != 0) {
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| 52 | fprintf(stderr,"Unable to close %s\n",mr_logfile);
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| 53 | }
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| 54 | mr_msg_loglevel(loglevel);
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| 55 | }
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| 56 |
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| 57 | /*
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| 58 | * Function that log a message. Not called directly
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| 59 | * but through other functions
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| 60 | * fmt needs to be just before ...
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| 61 | * debug should be >0 to have file and line printed (real debug)
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| 62 | * If =0 it's an informative log message
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| 63 | */
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| 64 | void mr_msg_int(int debug, int line, const char *file, const char *fmt, ...) {
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| 65 |
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| 66 | int i = 0;
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| 67 | int res = 0;
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| 68 | FILE *fout = NULL;
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| 69 | va_list args;
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| 70 |
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| 71 | if (mr_logfile == NULL) {
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| 72 | return;
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| 73 | }
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| 74 |
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| 75 | if (debug <= mr_loglevel) {
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| 76 | if ((fout = fopen(mr_logfile, "a")) == NULL) {
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| 77 | fprintf(stderr,"Unable to append to %s\n",mr_logfile);
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| 78 | return;
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| 79 | }
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| 80 |
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| 81 | // add 2 spaces to distinguish log levels
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| 82 | if (debug > 0) {
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| 83 | for (i = 1; i < debug; i++)
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| 84 | fprintf(fout, " ");
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| 85 | fprintf(fout, "%s #%d: ", file, line);
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| 86 | }
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| 87 | va_start(args,fmt);
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| 88 | if (vfprintf(fout, fmt, args) < 0) {
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| 89 | fprintf(stderr,"Unable to print to %s\n",mr_logfile);
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| 90 | }
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| 91 | fprintf(fout,"\n");
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| 92 | va_end(args);
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| 93 |
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| 94 | if ((res = fclose(fout)) != 0) {
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| 95 | fprintf(stderr,"Unable to close %s\n",mr_logfile);
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| 96 | }
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| 97 | }
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| 98 | }
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