lbbs/src/log.c

/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
 * log
 *   - logger
 *
 * Copyright (C) 2004-2025  Leaflet <leaflet@leafok.com>
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "common.h"
#include "io.h"
#include "log.h"
#include <errno.h>
#include <stdarg.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <sys/types.h>

enum _log_constant_t
{
        STR_LOG_TIME_MAX_LEN = 50,
};

static char path_common_log[FILE_PATH_LEN];
static char path_error_log[FILE_PATH_LEN];
static FILE *fp_common_log;
static FILE *fp_error_log;
static int redir_common_log = 0;
static int redir_error_log = 0;

int log_begin(const char *common_log_file, const char *error_log_file)
{
        strncpy(path_common_log, common_log_file, sizeof(path_common_log) - 1);
        path_common_log[sizeof(path_common_log) - 1] = '\0';
        strncpy(path_error_log, error_log_file, sizeof(path_error_log) - 1);
        path_error_log[sizeof(path_error_log) - 1] = '\0';

        fp_common_log = fopen(path_common_log, "a");
        if (fp_common_log == NULL)
        {
                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: %d\n", path_error_log, errno);
                return -2;
        }

        redir_common_log = 0;
        redir_error_log = 0;

        return 0;
}

void log_end()
{
        fclose(fp_common_log);
        fclose(fp_error_log);
}

inline static void log_head(char *buf, size_t len, int log_level, const char *app_file, int app_line)
{
        time_t t;
        struct tm gm_tm;
        char s_time[STR_LOG_TIME_MAX_LEN + 1];

        time(&t);
        gmtime_r(&t, &gm_tm);
        strftime(s_time, sizeof(s_time), "%Y-%m-%d %H:%M:%S", &gm_tm);

        if (log_level == LOG_LEVEL_COMMON)
        {
                snprintf(buf, len, "[%s] [%d] [INFO] ", s_time, getpid());
        }
        else // if (log_level == LOG_LEVEL_ERROR)
        {
                snprintf(buf, len, "[%s] [%d] [ERROR] [%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, ...)
{
        va_list args;
        int retval;
        char buf[LINE_BUFFER_LEN];
        FILE *fp_log;

        fp_log = (log_level == LOG_LEVEL_ERROR ? fp_error_log : fp_common_log);

        log_head(buf, sizeof(buf), log_level, app_file, app_line);
        strncat(buf, format, sizeof(buf) - strnlen(buf, sizeof(buf)));

        va_start(args, format);
        retval = vfprintf(fp_log, buf, args);
        va_end(args);

        fflush(fp_log);

        return retval;
}

int log_common_redir(int fd)
{
        redir_common_log = 1;
        return dup2(fd, fileno(fp_common_log));
}

int log_error_redir(int fd)
{
        redir_error_log = 1;
        return dup2(fd, fileno(fp_error_log));
}

int log_restart(void)
{
        FILE *fp;

        if (!redir_common_log)
        {
                fp = fopen(path_common_log, "a");
                if (fp == NULL)
                {
                        log_error("fopen(%s) error: %d\n", path_common_log, errno);
                        return -1;
                }
                fclose(fp_common_log);
                fp_common_log = fp;
        }

        if (!redir_error_log)
        {
                fp = fopen(path_error_log, "a");
                if (fp == NULL)
                {
                        log_error("fopen(%s) error: %d\n", path_error_log, errno);
                        return -2;
                }
                fclose(fp_error_log);
                fp_error_log = fp;
        }

        return 0;
}
1	sysadm	1.27	/* SPDX-License-Identifier: GPL-3.0-or-later */
2			/*
3			* log
4			* - logger
5			*
6	sysadm	1.28	* Copyright (C) 2004-2025 Leaflet <leaflet@leafok.com>
7	sysadm	1.27	*/
8	sysadm	1.1
9	sysadm	1.31	#ifdef HAVE_CONFIG_H
10			#include "config.h"
11			#endif
12
13	sysadm	1.26	#include "common.h"
14			#include "io.h"
15	sysadm	1.21	#include "log.h"
16	sysadm	1.35	#include <errno.h>
17	sysadm	1.6	#include <stdarg.h>
18	sysadm	1.24	#include <string.h>
19	sysadm	1.6	#include <time.h>
20	sysadm	1.10	#include <unistd.h>
21	sysadm	1.24	#include <sys/types.h>
22	sysadm	1.19
23	sysadm	1.30	enum _log_constant_t
24			{
25			STR_LOG_TIME_MAX_LEN = 50,
26			};
27	sysadm	1.22
28	sysadm	1.33	static char path_common_log[FILE_PATH_LEN];
29			static char path_error_log[FILE_PATH_LEN];
30	sysadm	1.22	static FILE *fp_common_log;
31			static FILE *fp_error_log;
32	sysadm	1.33	static int redir_common_log = 0;
33			static int redir_error_log = 0;
34	sysadm	1.1
35	sysadm	1.29	int log_begin(const char common_log_file, const char error_log_file)
36	sysadm	1.1	{
37	sysadm	1.33	strncpy(path_common_log, common_log_file, sizeof(path_common_log) - 1);
38			path_common_log[sizeof(path_common_log) - 1] = '\0';
39			strncpy(path_error_log, error_log_file, sizeof(path_error_log) - 1);
40			path_error_log[sizeof(path_error_log) - 1] = '\0';
41
42			fp_common_log = fopen(path_common_log, "a");
43	sysadm	1.20	if (fp_common_log == NULL)
44	sysadm	1.11	{
45	sysadm	1.35	fprintf(stderr, "fopen(%s) error: %d\n", path_common_log, errno);
46	sysadm	1.11	return -1;
47			}
48	sysadm	1.1
49	sysadm	1.33	fp_error_log = fopen(path_error_log, "a");
50	sysadm	1.20	if (fp_error_log == NULL)
51	sysadm	1.11	{
52	sysadm	1.35	fprintf(stderr, "fopen(%s) error: %d\n", path_error_log, errno);
53	sysadm	1.11	return -2;
54			}
55	sysadm	1.1
56	sysadm	1.33	redir_common_log = 0;
57			redir_error_log = 0;
58
59	sysadm	1.11	return 0;
60	sysadm	1.1	}
61
62	sysadm	1.13	void log_end()
63	sysadm	1.1	{
64	sysadm	1.20	fclose(fp_common_log);
65			fclose(fp_error_log);
66	sysadm	1.1	}
67
68	sysadm	1.22	inline static void log_head(char buf, size_t len, int log_level, const char app_file, int app_line)
69	sysadm	1.2	{
70	sysadm	1.11	time_t t;
71	sysadm	1.18	struct tm gm_tm;
72	sysadm	1.22	char s_time[STR_LOG_TIME_MAX_LEN + 1];
73	sysadm	1.9
74	sysadm	1.18	time(&t);
75			gmtime_r(&t, &gm_tm);
76			strftime(s_time, sizeof(s_time), "%Y-%m-%d %H:%M:%S", &gm_tm);
77	sysadm	1.9
78	sysadm	1.22	if (log_level == LOG_LEVEL_COMMON)
79			{
80			snprintf(buf, len, "[%s] [%d] [INFO] ", s_time, getpid());
81			}
82			else // if (log_level == LOG_LEVEL_ERROR)
83			{
84	sysadm	1.23	snprintf(buf, len, "[%s] [%d] [ERROR] [%s:%d] ", s_time, getpid(), app_file, app_line);
85	sysadm	1.22	}
86	sysadm	1.2	}
87
88	sysadm	1.29	int log_printf(enum log_level_t log_level, const char app_file, int app_line, const char format, ...)
89	sysadm	1.1	{
90	sysadm	1.11	va_list args;
91			int retval;
92	sysadm	1.21	char buf[LINE_BUFFER_LEN];
93	sysadm	1.22	FILE *fp_log;
94	sysadm	1.2
95	sysadm	1.22	fp_log = (log_level == LOG_LEVEL_ERROR ? fp_error_log : fp_common_log);
96	sysadm	1.1
97	sysadm	1.22	log_head(buf, sizeof(buf), log_level, app_file, app_line);
98	sysadm	1.14	strncat(buf, format, sizeof(buf) - strnlen(buf, sizeof(buf)));
99	sysadm	1.3
100	sysadm	1.11	va_start(args, format);
101	sysadm	1.22	retval = vfprintf(fp_log, buf, args);
102	sysadm	1.11	va_end(args);
103	sysadm	1.2
104	sysadm	1.22	fflush(fp_log);
105	sysadm	1.1
106	sysadm	1.11	return retval;
107	sysadm	1.1	}
108	sysadm	1.5
109	sysadm	1.20	int log_common_redir(int fd)
110	sysadm	1.5	{
111	sysadm	1.33	redir_common_log = 1;
112	sysadm	1.32	return dup2(fd, fileno(fp_common_log));
113	sysadm	1.5	}
114
115	sysadm	1.20	int log_error_redir(int fd)
116	sysadm	1.5	{
117	sysadm	1.33	redir_error_log = 1;
118	sysadm	1.32	return dup2(fd, fileno(fp_error_log));
119	sysadm	1.5	}
120	sysadm	1.33
121			int log_restart(void)
122			{
123			FILE *fp;
124
125			if (!redir_common_log)
126			{
127			fp = fopen(path_common_log, "a");
128			if (fp == NULL)
129			{
130	sysadm	1.35	log_error("fopen(%s) error: %d\n", path_common_log, errno);
131	sysadm	1.33	return -1;
132			}
133			fclose(fp_common_log);
134			fp_common_log = fp;
135			}
136
137			if (!redir_error_log)
138			{
139			fp = fopen(path_error_log, "a");
140			if (fp == NULL)
141			{
142	sysadm	1.35	log_error("fopen(%s) error: %d\n", path_error_log, errno);
143	sysadm	1.33	return -2;
144			}
145			fclose(fp_error_log);
146			fp_error_log = fp;
147			}
148
149			return 0;
150			}
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