newlib/libc/reent/fstatr.c

   1 /* Reentrant versions of fstat system call.  This implementation just
   2    calls the fstat system call.  */
   3
   4 #include <reent.h>
   5 #include <unistd.h>
   6 #include <sys/stat.h>
   7 #include <_syslist.h>
   8
   9 /* Some targets provides their own versions of these functions.  Those
  10    targets should define REENTRANT_SYSCALLS_PROVIDED in TARGET_CFLAGS.  */
  11
  12 #ifdef _REENT_ONLY
  13 #ifndef REENTRANT_SYSCALLS_PROVIDED
  14 #define REENTRANT_SYSCALLS_PROVIDED
  15 #endif
  16 #endif
  17
  18 #ifdef REENTRANT_SYSCALLS_PROVIDED
  19
  20 int _dummy_fstat_syscalls = 1;
  21
  22 #else
  23
  24 /* We use the errno variable used by the system dependent layer.  */
  25 #undef errno
  26 extern int errno;
  27
  28 /*
  29 FUNCTION
  30         <<_fstat_r>>---Reentrant version of fstat
  31
  32 INDEX
  33         _fstat_r
  34
  35 SYNOPSIS
  36         #include <reent.h>
  37         int _fstat_r(struct _reent *<[ptr]>,
  38                      int <[fd]>, struct stat *<[pstat]>);
  39
  40 DESCRIPTION
  41         This is a reentrant version of <<fstat>>.  It
  42         takes a pointer to the global data block, which holds
  43         <<errno>>.
  44 */
  45
  46 int
  47 _fstat_r (ptr, fd, pstat)
  48      struct _reent *ptr;
  49      int fd;
  50      struct stat *pstat;
  51 {
  52   int ret;
  53
  54   errno = 0;
  55   if ((ret = _fstat (fd, pstat)) == -1 && errno != 0)
  56     _REENT_ERRNO(ptr) = errno;
  57   return ret;
  58 }
  59
  60 #endif /* ! defined (REENTRANT_SYSCALLS_PROVIDED) */