linuxÏ»ñÈ¡Óû§»ù±¾ÐÅÏ¢

ͨ¹ýcÓïÑÔ»ù´¡¿â´Ó»ñÈ¡linuxÓû§µÄ»ù±¾ÐÅÏ¢¡£
1¡¢Ê¹ÓÃstruct passwd¹ÜÀíÓû§ÐÅÏ¢¡£
struct passwd
{
  char *pw_name;                /* Óû§µÇ¼Ãû    */
  char *pw_passwd;              /* ÃÜÂë(¼ÓÃܺó)*/
  __uid_t pw_uid;               /* Óû§ID     */
  __gid_t pw_gid;               /* ×éID       */
  char *pw_gecos;               /* ÏêϸÓû§Ãû    */
  char *pw_dir;                 /* Óû§Ä¿Â¼       */
  char *pw_shell;               /* Shell³ÌÐòÃû */
};
 
2¡¢·ÖÎöÏಢµÄϵͳÎļþ/etc/passwd
1.     root:x:0:0:root:/root:/bin/bash   
2.     daemon:x:1:1:daemon:/usr/sbin:/bin/sh   
3.     bin:x:2:2:bin:/bin:/bin/sh  
ÔÚpasswdÎļþÖмǼµÄÊÇËùÓÐϵͳÓû§
ÿһÐбíʾһ¸öÍêÕûµÄstruct passwd½á¹¹£¬ÒÔ':'·Ö¸ô³öÿһÏîÖµ£¬Æä7Ïî¡£
3¡¢»ñȡϵͳµ±Ç°ÔËÐÐÓû§µÄ»ù±¾ÐÅÏ¢¡£
#include <grp.h>
#include <pwd.h>
#include <unistd.h>
#include <stdio.h>
 
int main ()
{
      uid_t uid;
      struct passwd *pw;
      struct group *grp;
      char **members;
     
      uid = getuid ();
      pw = getpwuid (uid);