source: branches/3.2/mondo/src/lib/mr_msg.c @ 3509

Last change on this file since 3509 was 3509, checked in by Bruno Cornec, 4 years ago
  • Change mr_msg_int interface by adding the FUNCTION macro
  • Use mr_msg in mr_system
  • Ability to use that new log system everywhere now
  • Property svn:eol-style set to native
File size: 2.4 KB
Line 
1/*
2 * $Id$
3 *
4 * Code (c)2006 Bruno Cornec <bruno@mondorescue.org>
5 *
6 *     Main file of mr_msg : a very small and simple
7 *     library for messages management
8 *
9 * Provided under the GPLv2
10 */
11
12#ifndef _GNU_SOURCE
13#define _GNU_SOURCE
14#endif
15#include <stdio.h>
16#include <stdarg.h>
17#include <stdlib.h>
18
19static int mr_loglevel = 0;
20static char *mr_logfile = NULL;
21static FILE *mr_flog = NULL;
22
23/*
24 * This function is in the lowest part of the tree
25 * It should not depend on any other function of the mr lib
26 */
27
28/* Function allowing to change loglevel after init */
29void mr_msg_loglevel(int loglevel) {
30
31    mr_loglevel = loglevel;
32}
33
34/* Cleanup function for messages */
35void mr_msg_close(void) {
36
37    int res = 0;
38    if ((res = fclose(mr_flog)) != 0) {
39        fprintf(stderr,"Unable to close %s\n",mr_logfile);
40    }
41    free(mr_logfile);
42
43    mr_logfile = NULL;
44    mr_loglevel = 0;
45    mr_flog = NULL;
46return;
47}
48
49/* Initialization function for messages */
50void mr_msg_init(const char *logfile, int loglevel) {
51    if (asprintf(&mr_logfile, "%s", logfile) == -1) {
52        fprintf(stderr,"Unable to alloc memory\n");
53        fprintf(stderr,"Logging desactivated\n");
54        mr_msg_close();
55    }
56    if (fopen(mr_logfile, "r") == NULL) {
57        /*  log file doesn't exist yet, so creating it */
58        if ((mr_flog = fopen(mr_logfile, "w")) == NULL) {
59            fprintf(stderr,"Unable to write to %s\n",mr_logfile);
60            fprintf(stderr,"Logging desactivated\n");
61            mr_msg_close();
62        }
63    } else {
64        /*  If it exists try to append to it */
65        if ((mr_flog = fopen(mr_logfile, "a")) == NULL) {
66            fprintf(stderr,"Unable to write to %s\n",mr_logfile);
67            fprintf(stderr,"Logging desactivated\n");
68            mr_msg_close();
69        }
70    }
71    mr_msg_loglevel(loglevel);
72}
73
74/*
75 * Function that log a message. Not called directly
76 * but through other functions
77 * fmt needs to be just before ...
78 * level should be >0 to have file and line printed (real debug)
79 * If =0 it's an informative log message
80 */
81void mr_msg_int(int level, int line, const char *file, char *function, const char *fmt, ...) {
82
83    va_list args;
84
85    if ((mr_logfile == NULL) || (mr_flog == NULL)) {
86        return;
87    }
88
89    if (level <= mr_loglevel) {
90        if (level > 0) {
91            fprintf(mr_flog, "DBG%d: ", level);
92            fprintf(mr_flog, "%s->%s#%d: ", file, function, line);
93        } else {
94            fprintf(mr_flog, "INFO: ");
95        }
96        va_start(args,fmt);
97        if (vfprintf(mr_flog, fmt, args) < 0) {
98            fprintf(stderr,"Unable to print to %s\n",mr_logfile);
99        }
100        fprintf(mr_flog,"\n");
101        va_end(args);
102
103    }
104    return;
105}
106
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