菜鸟问题：solaris下有没有C函数可以获得进程的相关信息？

RoyRen

比如：进程名、进程pid、进程所占CPU/Memory、开始时间、运行状态等等。
谢谢。

cs

The getpid() function returns the process ID of the  calling   process.
for other information, you can try getrusage:

NAME
     getrusage - get information about resource utilization

SYNOPSIS
     #include <sys/resource.h>;

     int getrusage(int who, struct rusage *r_usage);

refer to man page for detail usage of  the func.

RoyRen

我想得到的是所有系统中正在运行的进程的信息。
getpid()只能获得当前进程的pid。
谁能帮个忙啊？

liupch

读取/proc下的文件，每一个进程在该目录下都有一个相对应的文件。

1. 
   
2. fd = open(path, O_RDONLY);
   
3. ioctl(fd, PIOCPSINFO, &procinfo);
   
4. close(fd);
   

复制代码

RoyRen

能不能说的具体点，/proc下每个进程都对应一个目录，但我看了一下，都是二进制文件，没有文本文件，该怎么办？

cs

invoke read() or fread() to get the info.

you can refer to gdb's src for very clear usage.

waitingfly

用Shell的
     sar -R  10 5

liupch

读取/proc/进程号/psinfo这个文件。
就用我告诉你的那个函数
ioctl(fd, PIOCPSINFO, &amp;procinfo);
在看一下procinfo这个结构就知道了。

chdonald

写了个简单的程序,不是很完善
/* Usage: proc <pid>;
*/

#include <stdio.h>;
#include <unistd.h>;
#include <stropts.h>;
#include <sys/ioctl.h>;
#include <sys/old_procfs.h>;
#include <sys/types.h>;
#include <sys/stat.h>;
#include <fcntl.h>;
#include <errno.h>;

main(int argc, char **argv)
{
int fd;
char path[32];
prpsinfo_t procinfo;

snprintf(path,32,"/proc/%s",argv[1]);
fd = open(path, O_RDONLY);
printf("fd = %d\n", fd);
if (fd < 0){
       fprintf(stderr, "open %s error:%s\n", path, strerror(errno));
       close(fd);
       exit(1);
}
ioctl(fd, PIOCPSINFO, &procinfo);
printf("status=%c\n", procinfo.pr_sname);
printf("zomb = %c\n", procinfo.pr_zomb);  //if != 0, zomb
printf("nice = %c\n", procinfo.pr_nice);
printf("uid = %d\n", procinfo.pr_uid);
printf("gid = %d\n", procinfo.pr_gid);
printf("pid = %d\n", procinfo.pr_pid);
printf("ppid = %d\n", procinfo.pr_ppid);
printf("group leader = %d\n", procinfo.pr_pgrp);
printf("sid = %d\n", procinfo.pr_sid);
printf("start time = %d ns\n", procinfo.pr_start.tv_sec*10^9 + procinfo.pr_sta
rt.tv_nsec);
printf("user and system time = %d ns\n", procinfo.pr_time.tv_sec*10^9 + procin
fo.pr_time.tv_nsec);
printf("priority = %d\n", procinfo.pr_pri); //high value = high pri
printf("tty = %d\n", procinfo.pr_ottydev);
printf("used cpu = %d\%\n", procinfo.pr_pctcpu);
printf("used mem = %d\%\n", procinfo.pr_pctmem);
close(fd);
}