libc/sysdeps/linux/common/fstatat.c

   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 #include <bits/uClibc_arch_features.h>
  13
  14 /* 64bit ports tend to favor newfstatat() */
  15 #if __WORDSIZE == 64 && defined __NR_newfstatat
  16 # define __NR_fstatat64 __NR_newfstatat
  17 #endif
  18
  19 #if defined(__NR_fstatat64) && !defined(__UCLIBC_USE_TIME64__)
  20 int fstatat(int fd, const char *file, struct stat *buf, int flag)
  21 {
  22         int ret;
  23 # ifdef __ARCH_HAS_DEPRECATED_SYSCALLS__
  24         struct kernel_stat64 kbuf;
  25         ret = INLINE_SYSCALL(fstatat64, 4, fd, file, &kbuf, flag);
  26         if (ret == 0)
  27                 __xstat32_conv(&kbuf, buf);
  28 # else
  29         ret = INLINE_SYSCALL(fstatat64, 4, fd, file, buf, flag);
  30 # endif /* __ARCH_HAS_DEPRECATED_SYSCALLS__ */
  31         return ret;
  32 }
  33 libc_hidden_def(fstatat)
  34 #else
  35
  36 #if defined(__NR_statx) && defined __UCLIBC_HAVE_STATX__
  37 #include <sys/sysmacros.h> // for makedev
  38
  39 int fstatat(int fd, const char *file, struct stat *buf, int flag)
  40 {
  41         int ret;
  42         struct statx tmp;
  43
  44         ret = INLINE_SYSCALL(statx, 5, fd, file, flag,
  45                              STATX_BASIC_STATS, &tmp);
  46         if (ret != 0)
  47                 return ret;
  48
  49         *buf = (struct stat) {
  50                 .st_dev = makedev(tmp.stx_dev_major, tmp.stx_dev_minor),
  51                 .st_ino = tmp.stx_ino,
  52                 .st_mode = tmp.stx_mode,
  53                 .st_nlink = tmp.stx_nlink,
  54                 .st_uid = tmp.stx_uid,
  55                 .st_gid = tmp.stx_gid,
  56                 .st_rdev = makedev(tmp.stx_rdev_major, tmp.stx_rdev_minor),
  57                 .st_size = tmp.stx_size,
  58                 .st_blksize = tmp.stx_blksize,
  59                 .st_blocks = tmp.stx_blocks,
  60                 .st_atim.tv_sec = tmp.stx_atime.tv_sec,
  61                 .st_atim.tv_nsec = tmp.stx_atime.tv_nsec,
  62                 .st_mtim.tv_sec = tmp.stx_mtime.tv_sec,
  63                 .st_mtim.tv_nsec = tmp.stx_mtime.tv_nsec,
  64                 .st_ctim.tv_sec = tmp.stx_ctime.tv_sec,
  65                 .st_ctim.tv_nsec = tmp.stx_ctime.tv_nsec,
  66         };
  67
  68         return ret;
  69 }
  70 libc_hidden_def(fstatat)
  71
  72 #endif
  73
  74 /* should add emulation with fstat() and /proc/self/fd/ ... */
  75 #endif