#include <unistd.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <stdio.h>
#include <dirent.h>

struct rlimit rlmt;

char* get_size()
{
　　if (getrlimit(RLIMIT_CORE, &rlmt) == -1) {
　　return -1;
　　}
　　return (char*)rlmt.rlim_cur;

};

char* set_size(double CORE_SIZE)
{
　　rlmt.rlim_cur = (rlim_t)CORE_SIZE;
　　rlmt.rlim_max = (rlim_t)CORE_SIZE;

　　if (setrlimit(RLIMIT_CORE, &rlmt) == -1) {
　　return -1;
　　}

　　return (char*)rlmt.rlim_cur;

};

int cd_chdir(const char *dirname)
{
　　int a=chdir(dirname);
　　return a;

};

## Linux/BSD

LDFLAGS += -shared

CFLAGS ?= -g -O -Wall
override CFLAGS += -fpic

#CC = gcc
RM = rm -f

COPY = cp

all: my_corefile.so

my_corefile.o: my_corefile.c

my_corefile.so: my_corefile.o
$(CC) $(LDFLAGS) $^ -o $@

clean:
$(RM) *.so *.o

local ffi = require 'ffi'
--local ffi_string = ffi.string
--local ffi_new = ffi.new
--local C = ffi.C

ffi.cdef[[
　　int get_size();
　　int set_size(long CORE_SIZE);
　　int cd_chdir(const char *dirname);
]]

set_get_core = ffi.load('/home/chentao/c_test/c_lua/qq/mycorefile/my_corefile.so')--直接导入绝对路径

local a = set_get_core.get_size()
print(a)

local b = set_get_core.set_size(524280)
print(b)

print("hass set")
local a = set_get_core.get_size()
print(a)

print(os.getenv("PWD"))

print(" cd ",set_get_core.cd_chdir("/home"))