temp1.c

linux下的进程开发实例

#include <unistd.h>
#include <pwd.h>
#include <sys/types.h>
#include <stdio.h>

/* 进程标志 */
int main()
{
	pid_t my_pid, parent_pid;
	uid_t my_uid, my_euid;
	gid_t my_gid, my_egid;
	struct passwd *my_info;

	my_pid = getpid();          // 进程ID
	parent_pid = getppid();     // 父进程ID
	my_uid = getuid();          // 用户ID
	my_euid = geteuid();        // 有效用户ID
	my_gid = getgid();          // 组ID
	my_egid = getegid();        // 有效组ID
	my_info = getpwuid(my_uid); // 用户信息
	
	printf("Process ID: %ld\n", my_pid);
	printf("Parent ID: %ld\n", parent_pid);
	printf("User ID: %ld\n", my_uid);
	printf("Effective User ID: %ld\n", my_euid);
	printf("Group ID: %ld\n", my_gid);
	printf("Effective Group ID: %ld\n", my_egid);
	if(my_info)
	{
		printf("My Login name: %s\n", my_info->pw_name);  // 登录名称
		printf("My Password: %s\n", my_info->pw_passwd);  // 登录口令
		printf("My User ID: %ld\n", my_info->pw_uid);     // 用户ID
		printf("My Group ID: %ld\n", my_info->pw_gid);    // 用户组ID
		printf("My Real Name: %s\n", my_info->pw_gecos);  // 用户真名
		printf("My Home Dir: %s\n", my_info->pw_dir);     // 用户目录
		printf("My Work Shell: %s\n", my_info->pw_shell); // 用户SHELL
	}
}