newlib/libc/reent/unlinkr.c

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