/*
* log.c
*
* Copyright 2013 Red Hat, Inc.
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see .
*/
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include "log.h"
static int log_fd = -1;
static FILE *f = NULL;
static int
open_log(void)
{
if (log_fd > -1)
return 0;
log_fd = open("/var/log/grubby", O_RDWR|O_APPEND|O_CREAT|O_CLOEXEC, 0600);
if (log_fd < 0)
return log_fd;
f = fdopen(log_fd, "a+");
if (f == NULL) {
typeof(errno) saved_errno = errno;
close(log_fd);
log_fd = -1;
errno = saved_errno;
return -1;
}
setbuf(f, NULL);
return 0;
}
int
log_time(FILE *log)
{
if (!log) {
int rc = open_log();
if (rc < 0)
return rc;
}
time_t t = time(NULL);
char timestr[27];
ctime_r(&t, timestr);
timestr[26] = '\0';
for (int i = 26; i >= 0; i--)
if (timestr[i] == '\n')
timestr[i] = '\0';
return log_message(log, "DBG: %d: %s: ", getpid(), timestr);
}
int
log_vmessage(FILE *log, const char *msg, va_list ap)
{
int rc;
if (!msg)
return -1;
if (msg[0] == '\0')
return 0;
if (!log) {
rc = open_log();
if (rc < 0)
return rc;
}
va_list aq;
va_copy(aq, ap);
vfprintf(log ? log : f, msg, aq);
va_end(aq);
fdatasync(log ? fileno(log) : log_fd);
return 0;
}
int
log_message(FILE *log, const char *msg, ...)
{
va_list argp;
va_start(argp, msg);
int rc = log_vmessage(log, msg, argp);
va_end(argp);
return rc;
}