linux 系统资源限制查看

Posted 2023-02-22 sz_bb

#include <stdio.h>
#include "errno.h"
#include <sys/resource.h>


/*
struct rlimit
rlim_t rlim_cur;  //软限制
rlim_t rlim_max;  //硬限制
; 

*/

//int getrlimit(int resource, struct rlimit *rlim);
//int setrlimit(int resource, const struct rlimit *rlim);


int main(int argc, void *argv[])
struct rlimit rlimit_;
rlimit_.rlim_cur = 0;
rlimit_.rlim_max = 0;

//进程虚拟内存总量限制
if (getrlimit(RLIMIT_AS, &rlimit_) == -1)
printf("errno=%d\\n",errno);
return -1;

printf("RLIMIT_AS cur=%d, mac=%d\\n", rlimit_.rlim_cur, rlimit_.rlim_max);


//进程核心转储文件(core dump)大小限制
if (getrlimit(RLIMIT_CORE, &rlimit_) == -1)
printf("errno=%d\\n",errno);
return -1;

printf("RLIMIT_CORE cur=%d, mac=%d\\n", rlimit_.rlim_cur, rlimit_.rlim_max);


//进程CPU时间限制 单位(秒)
if (getrlimit(RLIMIT_CPU, &rlimit_) == -1)
printf("errno=%d\\n",errno);
return -1;

printf("RLIMIT_CPU cur=%d, mac=%d\\n", rlimit_.rlim_cur, rlimit_.rlim_max);

//文件大小限制，单位(字节)
if (getrlimit(RLIMIT_FSIZE, &rlimit_) == -1)
printf("errno=%d\\n",errno);
return -1;

printf("RLIMIT_FSIZE cur=%d, mac=%d\\n", rlimit_.rlim_cur, rlimit_.rlim_max);

//进程数据段限制，单位(字节)
if (getrlimit(RLIMIT_DATA, &rlimit_) == -1)
printf("errno=%d\\n",errno);
return -1;

printf("RLIMIT_DATA cur=%d, mac=%d\\n", rlimit_.rlim_cur, rlimit_.rlim_max);


//文件描述符数量限制
if (getrlimit(RLIMIT_NOFILE, &rlimit_) == -1)
printf("errno=%d\\n",errno);
return -1;

printf("RLIMIT_NOFILE cur=%d, mac=%d\\n", rlimit_.rlim_cur, rlimit_.rlim_max);


//用户创建进程数量限制
if (getrlimit(RLIMIT_NPROC, &rlimit_) == -1)
printf("errno=%d\\n",errno);
return -1;

printf("RLIMIT_NPROC cur=%d, mac=%d\\n", rlimit_.rlim_cur, rlimit_.rlim_max);


//进程能挂起的信号数量限制
if (getrlimit(RLIMIT_SIGPENDING, &rlimit_) == -1)
printf("errno=%d\\n",errno);
return -1;

printf("RLIMIT_SIGPENDING cur=%d, mac=%d\\n", rlimit_.rlim_cur, rlimit_.rlim_max);



//进程栈限制
if (getrlimit(RLIMIT_STACK, &rlimit_) == -1)
printf("errno=%d\\n",errno);
return -1;

printf("RLIMIT_STACK cur=%d, mac=%d\\n", rlimit_.rlim_cur, rlimit_.rlim_max);

return 0;

输出内容：

RLIMIT_AS cur=-1, mac=-1
RLIMIT_CORE cur=0, mac=-1
RLIMIT_CPU cur=-1, mac=-1
RLIMIT_FSIZE cur=-1, mac=-1
RLIMIT_DATA cur=-1, mac=-1
RLIMIT_NOFILE cur=1024, mac=4096
RLIMIT_NPROC cur=1024, mac=14733
RLIMIT_SIGPENDING cur=14733, mac=14733
RLIMIT_STACK cur=10485760, mac=-1