getresuid, getresgid - 獲得真正的，有效的和保存的用戶或組ID

內容簡介

#define _GNU_SOURCE 
#include <unistd.h>

int getresuid(uid_t *ruid, uid_t *euid, uid_t *suid); 
int getresgid(gid_t *rgid, gid_t *egid, gid_t *sgid);

描述

getresuid() and getresgid() (both introduced in Linux 2.1.44) get the real UID, effective UID, and saved set-user-ID (resp. group ID’s) of the current process.

返回值

On success, zero is returned. On error, -1 is returned, and errno is set appropriately.

錯誤

標簽	描述
EFAULT	One of the arguments specified an address outside the calling program’s address space.

遵循於

These calls are non-standard; they also appear on HP-UX and some of the BSDs.

The prototype is given by glibc since version 2.3.2 provided _GNU_SOURCE is defined.

另請參閱

• getuid (2)

• setresuid (2)

• setreuid (2)

• setuid (2)