linux 程序崩溃之后会产生core file,带有时间戳,但是时间戳总是不是很直观,每次都要转换下才能知道是什么时候产生的,怎么样才能让生成的core文件的时间戳变成日期格式,如20160911
这样的
自己写代码...
先修改 /proc/sys/kernel/core_pattern
|/sbin/genCore %p %t
genCore的源代码如下,会在crash进程同一目录下生成core.pid.MYD格式的coredump.
genCore.c
#define _GNU_SOURCE
#include <sys/stat.h>
#include <fcntl.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <time.h>
#define BUF_SIZE 1024
#define FILENAME_MAX_LENGTH 256
#define TIMESTAMP_MAX_LENGTH 20
int
main(int argc, char *argv[])
{
int tot, j;
ssize_t nread;
char buf[BUF_SIZE];
FILE *fp;
char cwd[PATH_MAX];
char fileName[FILENAME_MAX_LENGTH];
char strTimeStamp[TIMESTAMP_MAX_LENGTH];
struct tm *coreTimeStamp;
time_t rawTimeStamp;
/* Change our current working directory to that of the
crashing process */
snprintf(cwd, PATH_MAX, "/proc/%s/cwd", argv[1]);
chdir(cwd);
/* Write output to file "core.<pid>.<Ymd>" in that directory */
rawTimeStamp = (time_t) (atoi(argv[2]));
coreTimeStamp = localtime(&rawTimeStamp);
strftime(strTimeStamp, TIMESTAMP_MAX_LENGTH,"%Y%m%d",coreTimeStamp);
snprintf(fileName, FILENAME_MAX_LENGTH, "core.%s.%s", argv[1], strTimeStamp);
fp = fopen(fileName, "w+");
if (fp == NULL)
exit(EXIT_FAILURE);
/* Dump the core dump to file */
while ((nread = read(STDIN_FILENO, buf, BUF_SIZE)) > 0)
fwrite(buf, nread, 1, fp);
fclose(fp);
exit(EXIT_SUCCESS);
}
那是个标准的时间戳,除非你自己修改内核dump的代码,做一些转换。或者用工具将文件名重新计算改一下。