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
  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
  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 # endif /* __ARCH_HAS_DEPRECATED_SYSCALLS__ */
  30         return ret;
  31 }
  32 libc_hidden_def(fstatat)
  33 #else
  34
  35 #if defined(__NR_statx)
  36 #include <sys/sysmacros.h> // for makedev
  37
  38 int fstatat(int fd, const char *file, struct stat *buf, int flag)
  39 {
  40         int ret;
  41         struct statx tmp;
  42
  43         ret = INLINE_SYSCALL(statx, 5, fd, file, flag,
  44                              STATX_BASIC_STATS, &tmp);
  45         if (ret != 0)
  46                 return ret;
  47
  48         *buf = (struct stat) {
  49                 .st_dev = makedev(tmp.stx_dev_major, tmp.stx_dev_minor),
  50                 .st_ino = tmp.stx_ino,
  51                 .st_mode = tmp.stx_mode,
  52                 .st_nlink = tmp.stx_nlink,
  53                 .st_uid = tmp.stx_uid,
  54                 .st_gid = tmp.stx_gid,
  55                 .st_rdev = makedev(tmp.stx_rdev_major, tmp.stx_rdev_minor),
  56                 .st_size = tmp.stx_size,
  57                 .st_blksize = tmp.stx_blksize,
  58                 .st_blocks = tmp.stx_blocks,
  59                 .st_atim.tv_sec = tmp.stx_atime.tv_sec,
  60                 .st_atim.tv_nsec = tmp.stx_atime.tv_nsec,
  61                 .st_mtim.tv_sec = tmp.stx_mtime.tv_sec,
  62                 .st_mtim.tv_nsec = tmp.stx_mtime.tv_nsec,
  63                 .st_ctim.tv_sec = tmp.stx_ctime.tv_sec,
  64                 .st_ctim.tv_nsec = tmp.stx_ctime.tv_nsec,
  65         };
  66
  67         return ret;
  68 }
  69 libc_hidden_def(fstatat)
  70
  71 #endif
  72
  73 /* should add emulation with fstat() and /proc/self/fd/ ... */
  74 #endif