1 #include <stdio.h>

2 #include <stdlib.h>

3 #include <string.h>

4 #include <stdarg.h>

5 #include <errno.h>

6 #include "logger.h"

7

8 static FILE *logfile;

9

10 int set_log_file(const char *fname)

11 {

12 FILE *fp;

13

14 if(!(fp = fopen(fname, "w"))) {

15 fprintf(stderr, "failed to open logfile: %s: %s\n", fname, strerror(errno));

16 return -1;

17 }

18 setvbuf(fp, 0, _IONBF, 0);

19 logfile = fp;

20 return 0;

21 }

22

23 void logmsg(const char *fmt, ...)

24 {

25 va_list ap;

26

27 if(!logfile) {

28 logfile = stderr;

29 }

30

31 va_start(ap, fmt);

32 vfprintf(logfile, fmt, ap);

33 va_end(ap);

34 }