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/*
* Copyright 2004-2012 Red Hat, Inc.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU General Public License v2 or (at your option) any later version.
*/
#include "dlm_daemon.h"
static int syslog_facility;
static int syslog_priority;
static int logfile_priority;
static char logfile[PATH_MAX];
static FILE *logfile_fp;
/* logfile_priority is the only one of these options that
can be controlled from command line, environment variable
and dynamic setting.
*/
void set_logfile_priority(void)
{
if (opt(debug_logfile_ind))
logfile_priority = LOG_DEBUG;
else
logfile_priority = DEFAULT_LOGFILE_PRIORITY;
}
void init_logging(void)
{
mode_t old_umask;
int rv;
syslog_facility = DEFAULT_SYSLOG_FACILITY;
syslog_priority = DEFAULT_SYSLOG_PRIORITY;
logfile_priority = DEFAULT_LOGFILE_PRIORITY;
strcpy(logfile, DEFAULT_LOGFILE);
set_logfile_priority();
old_umask = umask(0077);
rv = mkdir(SYS_VARDIR, 0700);
if (rv < 0 && errno != EEXIST) {
umask(old_umask);
goto skip_logfile;
}
rv = mkdir(SYS_LOGDIR, 0700);
if (rv < 0 && errno != EEXIST) {
umask(old_umask);
goto skip_logfile;
}
rv = mkdir(LOGDIR, 0700);
if (rv < 0 && errno != EEXIST) {
umask(old_umask);
goto skip_logfile;
}
umask(old_umask);
if (logfile[0]) {
logfile_fp = fopen(logfile, "a+");
if (logfile_fp != NULL) {
int fd = fileno(logfile_fp);
fcntl(fd, F_SETFD, fcntl(fd, F_GETFD, 0) | FD_CLOEXEC);
}
}
skip_logfile:
openlog(DAEMON_NAME, LOG_CONS | LOG_PID, syslog_facility);
}
void close_logging(void)
{
closelog();
if (logfile_fp)
fclose(logfile_fp);
}
#define NAME_ID_SIZE 32
#define LOG_STR_LEN 512
static char log_str[LOG_STR_LEN];
static char log_dump[LOG_DUMP_SIZE];
static unsigned int log_point;
static unsigned int log_wrap;
static char log_dump_plock[LOG_DUMP_SIZE];
static unsigned int log_point_plock;
static unsigned int log_wrap_plock;
static void log_copy(char *buf, int *len, char *log_buf,
unsigned int *point, unsigned int *wrap)
{
unsigned int p = *point;
unsigned int w = *wrap;
int tail_len;
if (!w && !p) {
*len = 0;
} else if (*wrap) {
tail_len = LOG_DUMP_SIZE - p;
memcpy(buf, log_buf + p, tail_len);
if (p)
memcpy(buf+tail_len, log_buf, p);
*len = LOG_DUMP_SIZE;
} else {
memcpy(buf, log_buf, p-1);
*len = p-1;
}
}
void copy_log_dump(char *buf, int *len)
{
log_copy(buf, len, log_dump, &log_point, &log_wrap);
}
void copy_log_dump_plock(char *buf, int *len)
{
log_copy(buf, len, log_dump_plock, &log_point_plock, &log_wrap_plock);
}
static void log_save_str(int len, char *log_buf, unsigned int *point,
unsigned int *wrap)
{
unsigned int p = *point;
unsigned int w = *wrap;
int i;
if (len < LOG_DUMP_SIZE - p) {
memcpy(log_buf + p, log_str, len);
p += len;
if (p == LOG_DUMP_SIZE) {
p = 0;
w = 1;
}
goto out;
}
for (i = 0; i < len; i++) {
log_buf[p++] = log_str[i];
if (p == LOG_DUMP_SIZE) {
p = 0;
w = 1;
}
}
out:
*point = p;
*wrap = w;
}
void log_level(const char *name_in, uint32_t level_in, const char *fmt, ...)
{
va_list ap;
char name[NAME_ID_SIZE + 2];
uint32_t level = level_in & 0x0000FFFF;
uint32_t extra = level_in & 0xFFFF0000;
int ret, pos = 0;
int len = LOG_STR_LEN - 2;
int namelen = 0;
int plock = extra & LOG_PLOCK;
memset(name, 0, sizeof(name));
if (name_in) {
namelen = snprintf(name, NAME_ID_SIZE + 1, "%s", name_in);
if (namelen > NAME_ID_SIZE)
namelen = NAME_ID_SIZE;
name[namelen] = ' ';
name[namelen+1] = '\0';
}
ret = snprintf(log_str + pos, len - pos, "%llu %s",
(unsigned long long)monotime(), name);
pos += ret;
va_start(ap, fmt);
ret = vsnprintf(log_str + pos, len - pos, fmt, ap);
va_end(ap);
if (ret >= len - pos)
pos = len - 1;
else
pos += ret;
log_str[pos++] = '\n';
log_str[pos++] = '\0';
if (level < LOG_NONE)
log_save_str(pos - 1, log_dump, &log_point, &log_wrap);
if (plock)
log_save_str(pos - 1, log_dump_plock, &log_point_plock, &log_wrap_plock);
if (level <= syslog_priority)
syslog(level, "%s", log_str);
if (level <= logfile_priority && logfile_fp) {
time_t logtime = time(NULL);
char tbuf[64];
strftime(tbuf, sizeof(tbuf), "%b %d %T", localtime(&logtime));
fprintf(logfile_fp, "%s %s", tbuf, log_str);
fflush(logfile_fp);
}
if (!dlm_options[daemon_debug_ind].use_int)
return;
if ((level < LOG_NONE) || (plock && opt(plock_debug_ind)))
fprintf(stderr, "%s", log_str);
}
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