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log.c
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log.c
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#include "log.h"
#include <sys/types.h>
#include <unistd.h>
#include <stdarg.h>
#include <string.h>
#include <stdio.h>
static int log_level = LOG_LEVEL_INFO;
static char process_name[32];
static inline int
log_message(int level, FILE *stream, const char *prefix, const char *fmt,
va_list ap)
{
if (level <= log_level) {
char new_fmt[strlen(prefix) + strlen(fmt) + sizeof(process_name) + 15];
snprintf(new_fmt, sizeof(new_fmt), "[%s:%d] %s: %s\n",
process_name, getpid(), prefix, fmt);
return vfprintf(stream, new_fmt, ap);
}
return 0;
}
void
set_process_name(const char *p)
{
snprintf(process_name, sizeof(process_name), "%s", p);
}
void
set_log_level(int level)
{
log_level = level;
}
int
lerr(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
return log_message(LOG_LEVEL_ERR, stderr, "ERR", fmt, ap);
}
int
lwarn(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
return log_message(LOG_LEVEL_WARN, stderr, "WRN", fmt, ap);
}
int
linfo(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
return log_message(LOG_LEVEL_INFO, stdout, "INF", fmt, ap);
}
int
ldbg(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
return log_message(LOG_LEVEL_DBG, stdout, "DBG", fmt, ap);
}