// SPDX-License-Identifier: ISC#include <stdarg.h>#include <stdbool.h>#include <stdio.h>#include <stdlib.h>#include <time.h>#include <unistd.h> #include "clm/log.h"#include "banned.h" CLM_API voidclm_debug(const char *fmt, ...){	static FILE *out;	static bool tried;	va_list ap; 	if (out == NULL) {		const char *path; 		if (tried)			return;		tried = true; 		path = getenv("CLM_DEBUG_LOG");		if (path == NULL)			return; /* logging disabled unless explicitly enabled */ 		out = fopen(path, "ae");		if (out == NULL)			return;	} 	/* Timestamp + PID prefix */	{		struct timespec ts;		struct tm tm;		clock_gettime(CLOCK_REALTIME, &ts);		localtime_r(&ts.tv_sec, &tm);		(void)fprintf(out, "%02d:%02d:%02d.%03ld [%d] ",		    tm.tm_hour, tm.tm_min, tm.tm_sec,		    ts.tv_nsec / 1000000, getpid());	} 	va_start(ap, fmt);	(void)vfprintf(out, fmt, ap);	va_end(ap);	(void)fputc('\n', out);	(void)fflush(out);}