--- lbbs/src/log.c	2025/11/17 11:17:37	1.34
+++ lbbs/src/log.c	2025/12/18 02:54:16	1.36
@@ -13,6 +13,7 @@
 #include "common.h"
 #include "io.h"
 #include "log.h"
+#include <errno.h>
 #include <stdarg.h>
 #include <string.h>
 #include <time.h>
@@ -41,14 +42,14 @@ int log_begin(const char *common_log_fil
 	fp_common_log = fopen(path_common_log, "a");
 	if (fp_common_log == NULL)
 	{
-		fprintf(stderr, "fopen(%s) error\n", path_common_log);
+		fprintf(stderr, "fopen(%s) error: %d\n", path_common_log, errno);
 		return -1;
 	}
 
 	fp_error_log = fopen(path_error_log, "a");
 	if (fp_error_log == NULL)
 	{
-		fprintf(stderr, "fopen(%s) error\n", path_error_log);
+		fprintf(stderr, "fopen(%s) error: %d\n", path_error_log, errno);
 		return -2;
 	}
 
@@ -78,10 +79,14 @@ inline static void log_head(char *buf, s
 	{
 		snprintf(buf, len, "[%s] [%d] [INFO] ", s_time, getpid());
 	}
-	else // if (log_level == LOG_LEVEL_ERROR)
+	else if (log_level == LOG_LEVEL_ERROR)
 	{
 		snprintf(buf, len, "[%s] [%d] [ERROR] [%s:%d] ", s_time, getpid(), app_file, app_line);
 	}
+	else // if (log_level == LOG_LEVEL_DEBUG)
+	{
+		snprintf(buf, len, "[%s] [%d] [DEBUG] [%s:%d] ", s_time, getpid(), app_file, app_line);
+	}
 }
 
 int log_printf(enum log_level_t log_level, const char *app_file, int app_line, const char *format, ...)
@@ -91,7 +96,7 @@ int log_printf(enum log_level_t log_leve
 	char buf[LINE_BUFFER_LEN];
 	FILE *fp_log;
 
-	fp_log = (log_level == LOG_LEVEL_ERROR ? fp_error_log : fp_common_log);
+	fp_log = (log_level == LOG_LEVEL_COMMON ? fp_common_log : fp_error_log);
 
 	log_head(buf, sizeof(buf), log_level, app_file, app_line);
 	strncat(buf, format, sizeof(buf) - strnlen(buf, sizeof(buf)));
@@ -126,7 +131,7 @@ int log_restart(void)
 		fp = fopen(path_common_log, "a");
 		if (fp == NULL)
 		{
-			log_error("fopen(%s) error\n", path_common_log);
+			log_error("fopen(%s) error: %d\n", path_common_log, errno);
 			return -1;
 		}
 		fclose(fp_common_log);
@@ -138,7 +143,7 @@ int log_restart(void)
 		fp = fopen(path_error_log, "a");
 		if (fp == NULL)
 		{
-			log_error("fopen(%s) error\n", path_error_log);
+			log_error("fopen(%s) error: %d\n", path_error_log, errno);
 			return -2;
 		}
 		fclose(fp_error_log);