mirror of
https://github.com/projectacrn/acrn-hypervisor.git
synced 2025-09-17 06:49:25 +00:00
92d75f0dc2
String function of strlen()/vsnprintf() shuould be replaced. This patch remove the strlen(). And vsnprintf() replaced by vasprintf(). Tracked-On: #2687 Signed-off-by: Wei Liu <weix.w.liu@intel.com> Reviewed-by: Yonghua Huang <yonghua.huang@intel.com> Reviewed-by: Tianhua Sun <tianhuax.s.sun@intel.com> Acked-by: Yin Fengwei <fengwei.yin@intel.com>
74 lines
1.1 KiB
C
74 lines
1.1 KiB
C
/*
|
|
* Copyright (C) 2018 Intel Corporation. All rights reserved.
|
|
*
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
*
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
#include <stdarg.h>
|
|
#include "dm_kmsg.h"
|
|
|
|
int fd_kmsg;
|
|
|
|
static int open_kmsg(void);
|
|
static int close_kmsg(void);
|
|
|
|
static int open_kmsg(void)
|
|
{
|
|
int fd;
|
|
|
|
/* open /dev/kmsg */
|
|
fd = open(KERN_NODE, O_RDWR | O_APPEND | O_NONBLOCK);
|
|
if (fd < 0) {
|
|
perror(KMSG_FMT"open_kmsg");
|
|
return fd;
|
|
}
|
|
|
|
fd_kmsg = fd;
|
|
return fd;
|
|
}
|
|
|
|
static int close_kmsg(void)
|
|
{
|
|
int err;
|
|
|
|
/* close /dev/kmsg */
|
|
err = close(fd_kmsg);
|
|
if (err == -1) {
|
|
perror(KMSG_FMT"close_kmsg");
|
|
return err;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void write_kmsg(const char *fmt, ...)
|
|
{
|
|
int write_cnt, len;
|
|
va_list args;
|
|
char *dm_buf;
|
|
|
|
va_start(args, fmt);
|
|
len = vasprintf(&dm_buf, fmt, args);
|
|
va_end(args);
|
|
if (len == -1) {
|
|
return;
|
|
}
|
|
|
|
open_kmsg();
|
|
|
|
/* write the fmt to the /dev/kmsg */
|
|
write_cnt = write(fd_kmsg, dm_buf, len);
|
|
if (write_cnt < 0) {
|
|
perror(KMSG_FMT"write_kmsg");
|
|
}
|
|
|
|
close_kmsg();
|
|
free(dm_buf);
|
|
return;
|
|
}
|