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

void setpwent(void);

#include <pwd.h>
#include <sys/types.h>
main()
{
 struct passwd *user;
 int i;
 for(i = 0; i < 4; i++)
 {
  user = getpwent();
  printf("%s :%d :%d :%s:%s:%s\n", user->pw_name, user->pw_uid, user->pw_gid,
  user->pw_gecos, user->pw_dir, user->pw_shell);
 }

 setpwent();
 user = getpwent();
 printf("%s :%d :%d :%s:%s:%s\n", user->pw_name, user->pw_uid, user->pw_gid,
 user->pw_gecos, user->pw_dir, user->pw_shell);
 endpwent();
}

root:0:0:root:/root:/bin/bash
bin:1:1:bin:/bin
daemon:2:2:daemon:/sbin
adm:3:4:adm:/var/adm
root:0:0:root:/root:/bin/bash

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

strcut passwd * getpwent(void);

struct passwd
{
 char * pw_name; //用户账号
 char * pw_passwd; //用户密码
 uid_t pw_uid; //用户识别码
 gid_t pw_gid; //组识别码
 char * pw_gecos; //用户全名
 char * pw_dir; //家目录
 char * pw_shell; //所使用的shell 路径
};

#include <pwd.h>
#include <sys/types.h>
main()
{
 struct passwd *user;
 while((user = getpwent()) != 0)
 {
   printf("%s:%d:%d:%s:%s:%s\n", user->pw_name, user->pw_uid, user->pw_gid,
  user->pw_gecos, user->pw_dir, user->pw_shell);
 }
 endpwent();
}

root:0:0:root:/root:/bin/bash
bin:1:1:bin:/bin:
daemon:2:2:daemon:/sbin:
adm:3:4:adm:/var/adm:
lp:4:7:lp:/var/spool/lpd:
sync:5:0:sync:/sbin:/bin/sync
shutdown:6:0:shutdown:/sbin:/sbin/shutdown
halt:7:0:halt:/sbin:/sbin/halt
mail:8:12:mail:/var/spool/mail:
news:9:13:news:var/spool/news
uucp:10:14:uucp:/var/spool/uucp:
operator:11:0:operator :/root:
games:12:100:games:/usr/games:
gopher:13:30:gopher:/usr/lib/gopher-data:
ftp:14:50:FTP User:/home/ftp:
nobody:99:99:Nobody:/:
xfs:100:101:X Font Server: /etc/Xll/fs:/bin/false
gdm:42:42:/home/gdm:/bin/bash
kids:500:500: : /home/kids:/bin/bash

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

void endpwent(void);