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/* SPDX-License-Identifier: GPL-3.0-or-later */
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/*
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* log
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* - logger
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*
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* Copyright (C) 2004-2026 Leaflet <leaflet@leafok.com>
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "common.h"
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#include "io.h"
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#include "log.h"
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#include <errno.h>
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#include <stdarg.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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#include <sys/types.h>
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enum _log_constant_t
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{
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STR_LOG_TIME_MAX_LEN = 50,
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};
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static char path_common_log[FILE_PATH_LEN];
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static char path_error_log[FILE_PATH_LEN];
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static FILE *fp_common_log = NULL;
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static FILE *fp_error_log = NULL;
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static int redir_common_log = 0;
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static int redir_error_log = 0;
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int log_begin(const char *common_log_file, const char *error_log_file)
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{
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strncpy(path_common_log, common_log_file, sizeof(path_common_log) - 1);
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path_common_log[sizeof(path_common_log) - 1] = '\0';
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strncpy(path_error_log, error_log_file, sizeof(path_error_log) - 1);
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path_error_log[sizeof(path_error_log) - 1] = '\0';
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fp_common_log = fopen(path_common_log, "a");
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if (fp_common_log == NULL)
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{
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fprintf(stderr, "fopen(%s) error: %s\n", path_common_log, strerror(errno));
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return -1;
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}
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fp_error_log = fopen(path_error_log, "a");
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if (fp_error_log == NULL)
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{
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fprintf(stderr, "fopen(%s) error: %s\n", path_error_log, strerror(errno));
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fclose(fp_common_log);
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fp_common_log = NULL;
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return -2;
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}
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redir_common_log = 0;
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redir_error_log = 0;
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return 0;
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}
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void log_end()
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{
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if (fp_common_log)
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{
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fclose(fp_common_log);
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fp_common_log = NULL;
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}
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if (fp_error_log)
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{
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fclose(fp_error_log);
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fp_error_log = NULL;
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}
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}
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inline static int log_head(char *buf, size_t len, int log_level, const char *app_file, int app_line)
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{
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time_t t;
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struct tm gm_tm;
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char s_time[STR_LOG_TIME_MAX_LEN + 1];
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int ret;
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time(&t);
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gmtime_r(&t, &gm_tm);
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strftime(s_time, sizeof(s_time), "%Y-%m-%d %H:%M:%S", &gm_tm);
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if (log_level == LOG_LEVEL_COMMON)
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{
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ret = snprintf(buf, len, "[%s] [%d] [INFO] ", s_time, getpid());
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}
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else if (log_level == LOG_LEVEL_ERROR)
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{
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ret = snprintf(buf, len, "[%s] [%d] [ERROR] [%s:%d] ", s_time, getpid(), app_file, app_line);
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}
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else // if (log_level == LOG_LEVEL_DEBUG)
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{
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ret = snprintf(buf, len, "[%s] [%d] [DEBUG] [%s:%d] ", s_time, getpid(), app_file, app_line);
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}
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return ret;
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}
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int log_printf(enum log_level_t log_level, const char *app_file, int app_line, const char *format, ...)
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{
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va_list args;
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char buf[LINE_BUFFER_LEN];
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FILE *fp_log;
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int offset;
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int ret;
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fp_log = (log_level == LOG_LEVEL_COMMON ? fp_common_log : fp_error_log);
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offset = log_head(buf, sizeof(buf), log_level, app_file, app_line);
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va_start(args, format);
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ret = vsnprintf(buf + offset, sizeof(buf) - (size_t)offset, format, args);
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va_end(args);
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if (ret < 0)
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{
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// Encoding error
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return -1;
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}
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else if (offset + ret + 1 >= sizeof(buf))
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{
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buf[sizeof(buf) - 2] = '\n'; // Add newline for truncated messages
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buf[sizeof(buf) - 1] = '\0'; // Ensure null termination
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if (fputs(buf, fp_log) == EOF)
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{
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return -3; // Write error
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}
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ret = -2; // Indicate truncation
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}
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else
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{
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buf[offset + ret] = '\n'; // Add newline
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buf[offset + ret + 1] = '\0'; // Ensure null termination
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if (fputs(buf, fp_log) == EOF)
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{
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return -3; // Write error
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}
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ret = offset + ret + 1; // Return number of characters written (including newline)
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}
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if (fflush(fp_log) == EOF)
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{
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return -4; // Flush error
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}
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return ret;
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}
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int log_common_redir(int fd)
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{
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redir_common_log = 1;
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return dup2(fd, fileno(fp_common_log));
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}
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int log_error_redir(int fd)
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{
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redir_error_log = 1;
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return dup2(fd, fileno(fp_error_log));
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}
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int log_restart(void)
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{
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FILE *fp_common = NULL;
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FILE *fp_error = NULL;
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if (!redir_common_log)
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{
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fp_common = fopen(path_common_log, "a");
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if (fp_common == NULL)
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{
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log_error("fopen(%s) error: %s", path_common_log, strerror(errno));
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return -1;
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}
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}
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if (!redir_error_log)
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{
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fp_error = fopen(path_error_log, "a");
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if (fp_error == NULL)
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{
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log_error("fopen(%s) error: %s", path_error_log, strerror(errno));
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if (fp_common)
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{
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fclose(fp_common);
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}
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return -2;
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}
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}
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// Apply new file pointers
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if (fp_common)
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{
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fclose(fp_common_log);
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fp_common_log = fp_common;
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}
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if (fp_error)
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{
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fclose(fp_error_log);
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fp_error_log = fp_error;
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}
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return 0;
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}
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