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#include "log.h"
#include <stdio.h>
#include <stdarg.h>
#include <time.h>
#include <string.h>
static FILE *log_file = NULL;
static LogLevel min_log_level = LOG_INFO;
static const char *level_str(LogLevel level) {
switch (level) {
case LOG_DEBUG: return "DEBUG";
case LOG_INFO: return "INFO ";
case LOG_WARN: return "WARN ";
case LOG_ERROR: return "ERROR";
default: return "?????";
}
}
void log_init(const char *path, LogLevel min_level) {
min_log_level = min_level;
if (path) {
log_file = fopen(path, "a");
if (!log_file) {
/* Fall back to stderr if we can't open the log file */
fprintf(stderr, "umbrella: could not open log file %s, using stderr\n", path);
log_file = stderr;
}
} else {
log_file = stderr;
}
}
void log_close(void) {
if (log_file && log_file != stderr) {
fclose(log_file);
log_file = NULL;
}
}
void log_write(LogLevel level, const char *fmt, ...) {
if (level < min_log_level) return;
if (!log_file) log_file = stderr;
/* Timestamp */
time_t now = time(NULL);
struct tm *tm = localtime(&now);
char ts[32];
strftime(ts, sizeof(ts), "%Y-%m-%d %H:%M:%S", tm);
fprintf(log_file, "[%s] [%s] ", ts, level_str(level));
va_list args;
va_start(args, fmt);
vfprintf(log_file, fmt, args);
va_end(args);
fprintf(log_file, "\n");
fflush(log_file);
}
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