1 /*
2 * fstatat() for uClibc
3 *
4 * Copyright (C) 2009 Analog Devices Inc.
5 *
6 * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
7 */
8
9 #include <sys/syscall.h>
10 #include <sys/stat.h>
11 #include "xstatconv.h"
12
13 /* 64bit ports tend to favor newfstatat() */
14 #if __WORDSIZE == 64 && defined __NR_newfstatat
15 # define __NR_fstatat64 __NR_newfstatat
16 #endif
17
18 #ifdef __NR_fstatat64
fstatat(int fd,const char * file,struct stat * buf,int flag)19 int fstatat(int fd, const char *file, struct stat *buf, int flag)
20 {
21 int ret;
22 # ifdef __ARCH_HAS_DEPRECATED_SYSCALLS__
23 struct kernel_stat64 kbuf;
24 ret = INLINE_SYSCALL(fstatat64, 4, fd, file, &kbuf, flag);
25 if (ret == 0)
26 __xstat32_conv(&kbuf, buf);
27 # else
28 ret = INLINE_SYSCALL(fstatat64, 4, fd, file, buf, flag);
29 if (ret == 0) {
30 /* Did we overflow */
31 if (buf->__pad1 || buf->__pad2 || buf->__pad3
32 || buf->__pad4 || buf->__pad5 || buf->__pad6
33 || buf->__pad7) {
34 __set_errno(EOVERFLOW);
35 return -1;
36 }
37 }
38 # endif /* __ARCH_HAS_DEPRECATED_SYSCALLS__ */
39 return ret;
40 }
41 libc_hidden_def(fstatat)
42 #else
43 /* should add emulation with fstat() and /proc/self/fd/ ... */
44 #endif
45