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tools: acrnlog: remove usage of banned APIs

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1, remove unsafe function sscanf
2, replace strlen with strnlen
3, replace atoll with strtoll and replace aoti with strtol

Tracked-On: #1254
Signed-off-by: Tianhua Sun <tianhuax.s.sun@intel.com>
Acked-by: Yan, Like <like.yan@intel.com>
Reviewed-by: Tao, Yuhong <yuhong.tao@intel.com>
This commit is contained in:
Tianhua Sun 2018-10-26 17:55:00 +08:00 committed by lijinxia
parent 1d96ce5fb7
commit e24464a039
1 changed files with 76 additions and 51 deletions
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127
tools/acrnlog/acrnlog.c
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@ -12,6 +12,7 @@
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <limits.h>
#include <dirent.h>
#include <errno.h>
#include <pthread.h>
@ -27,6 +28,37 @@
static unsigned int pcpu_num = PCPU_NUM;
static unsigned long interval = DEFAULT_POLL_INTERVAL;
/* this is for log file */
#define LOG_FILE_SIZE (1024*1024)
#define LOG_FILE_NUM 4
static size_t hvlog_log_size = LOG_FILE_SIZE;
static unsigned short hvlog_log_num = LOG_FILE_NUM;
struct hvlog_file {
const char *path;
int fd;
size_t left_space;
unsigned short index;
unsigned short num;
};
static struct hvlog_file cur_log = {
.path = "/tmp/acrnlog/acrnlog_cur",
.fd = -1,
.left_space = 0,
.index = ~0,
.num = LOG_FILE_NUM
};
static struct hvlog_file last_log = {
.path = "/tmp/acrnlog/acrnlog_last",
.fd = -1,
.left_space = 0,
.index = ~0,
.num = LOG_FILE_NUM
};
struct hvlog_msg {
__u64 usec; /* timestamp, from tsc reset in usec */
int cpu; /* which physical cpu output the log */
@ -50,6 +82,8 @@ struct hvlog_dev {
struct hvlog_msg latched_msg; /* latch for parsed msg */
};
size_t write_log_file(struct hvlog_file * log, const char *buf, size_t len);
/*
* get pcpu_num, which is equal to num of acrnlog dev
*/
@ -86,10 +120,12 @@ static int get_cpu_num(void)
*/
struct hvlog_msg *hvlog_read_dev(struct hvlog_dev *dev)
{
char *p = NULL;
int ret;
size_t len = 0;
struct hvlog_msg *msg[2];
int msg_num;
char warn_msg[LOG_MSG_SIZE] = {0};
msg[0] = dev->msg;
msg[1] = &dev->latched_msg;
@ -111,22 +147,30 @@ struct hvlog_msg *hvlog_read_dev(struct hvlog_dev *dev)
LOG_ELEMENT_SIZE);
if (!ret)
break;
/* do we read a new meaasge? */
ret =
sscanf(&msg[0]->raw[msg[0]->len],
"[%lluus][cpu=%d][sev=%d][seq=%llu]:",
&msg[msg_num]->usec, &msg[msg_num]->cpu,
&msg[msg_num]->sev, &msg[msg_num]->seq);
if (ret == 4) {
msg_num++;
/* if we read another new msg, latch it */
/* to process next time */
if (msg_num > 1) {
dev->latched = 1;
memcpy(dev->entry_latch,
&msg[0]->raw[msg[0]->len],
LOG_ELEMENT_SIZE);
break;
/* do we read a new meaasge?
* msg[0]->raw[msg[0]->len format: [%lluus][cpu=%d][sev=%d][seq=%llu]: */
p = strstr(&msg[0]->raw[msg[0]->len], "][seq=");
if (p) {
p = p + strlen("][seq=");
msg[msg_num]->seq = strtoull(p, NULL, 10);
if ((errno == ERANGE && (msg[msg_num]->seq == ULLONG_MAX))
|| (errno != 0 && msg[msg_num]->seq == 0)) {
if (snprintf(warn_msg, LOG_MSG_SIZE, "\n\n\t%s[invalid seq]\n\n\n",
LOG_INCOMPLETE_WARNING) >= LOG_MSG_SIZE) {
printf("WARN: warning message is truncated\n");
}
write_log_file(&cur_log, warn_msg, strnlen(warn_msg, LOG_MSG_SIZE));
} else {
msg_num++;
/* if we read another new msg, latch it */
/* to process next time */
if (msg_num > 1) {
dev->latched = 1;
memcpy(dev->entry_latch,
&msg[0]->raw[msg[0]->len],
LOG_ELEMENT_SIZE);
break;
}
}
}
}
@ -138,7 +182,7 @@ struct hvlog_msg *hvlog_read_dev(struct hvlog_dev *dev)
continue;
}
len = strlen(&msg[0]->raw[msg[0]->len]);
len = strnlen(&msg[0]->raw[msg[0]->len], LOG_MSG_SIZE);
msg[0]->len += len;
} while (len == LOG_ELEMENT_SIZE &&
msg[0]->len < LOG_MSG_SIZE - LOG_ELEMENT_SIZE);
@ -259,37 +303,6 @@ static struct hvlog_msg *get_min_seq_msg(struct hvlog_data *data, int num_dev)
return msg;
}
/* this is for log file */
#define LOG_FILE_SIZE (1024*1024)
#define LOG_FILE_NUM 4
static size_t hvlog_log_size = LOG_FILE_SIZE;
static unsigned short hvlog_log_num = LOG_FILE_NUM;
struct hvlog_file {
const char *path;
int fd;
size_t left_space;
unsigned short index;
unsigned short num;
};
static struct hvlog_file cur_log = {
.path = "/tmp/acrnlog/acrnlog_cur",
.fd = -1,
.left_space = 0,
.index = ~0,
.num = LOG_FILE_NUM
};
static struct hvlog_file last_log = {
.path = "/tmp/acrnlog/acrnlog_last",
.fd = -1,
.left_space = 0,
.index = ~0,
.num = LOG_FILE_NUM
};
static int new_log_file(struct hvlog_file *log)
{
char file_name[32] = { };
@ -434,15 +447,27 @@ static int parse_opt(int argc, char *argv[])
while ((opt = getopt(argc, argv, optString)) != -1) {
switch (opt) {
case 's':
hvlog_log_size = atoll(optarg) * 1024;
ret = strtoll(optarg, NULL, 10);
if ((errno == ERANGE && (ret == LLONG_MAX || ret == LLONG_MIN))
|| (errno != 0 && ret == 0)) {
printf("'-s' invalid parameter: %s\n", optarg);
return -EINVAL;
}
hvlog_log_size = ret * 1024;
break;
case 'n':
ret = atoi(optarg);
ret = strtol(optarg, NULL, 10);
if ((errno == ERANGE && (ret == LONG_MAX || ret == LONG_MIN))
|| (errno != 0 && ret == 0)) {
printf("'-n' invalid parameter: %s\n", optarg);
return -EINVAL;
}
if (ret > 3)
hvlog_log_num = ret;
break;
case 't':
ret = atoi(optarg);
ret = strtol(optarg, NULL, 10);
if (ret <= 0 || ret >=1000) {
printf("'-t' require integer between [1-999]\n");
return -EINVAL;