函数原型

  1. #include <sys/types.h>
  2. #include <pwd.h>
  4. struct passwd *getpwnam(const char *name);
  5. struct passwd *getpwuid(uid_t uid);
  7. int getpwnam_r(const char *name, struct passwd *pwd,
  8.                    char *buf, size_t buflen, struct passwd **result);
  9. int getpwuid_r(uid_t uid, struct passwd *pwd,
  10.                    char *buf, size_t buflen, struct passwd **result);

缩写的含义
getpwnam—->get password name
getpwuid—->get password uid

结构体passwd

定义在头文件pwd.h中

  1. struct passwd {
  2.        char   *pw_name;       /* 用户名 */
  3.        char   *pw_passwd;     /* 用户密码 */
  4.        uid_t   pw_uid;        /* 用户ID */
  5.        gid_t   pw_gid;        /* 用户组ID */
  6.        char   *pw_gecos;      /* 用户信息 */
  7.        char   *pw_dir;        /* home目录 */
  8.        char   *pw_shell;      /* shell程序 */
  9. };