/* Libiberty realpath. Like realpath, but more consistent behavior.
Based on gdb_realpath from GDB.
- Copyright 2003 Free Software Foundation, Inc.
+ Copyright (C) 2003-2019 Free Software Foundation, Inc.
This file is part of the libiberty library.
#ifdef HAVE_STRING_H
#include <string.h>
#endif
+#ifdef HAVE_FCNTL_H
+#include <fcntl.h>
+#endif
/* On GNU libc systems the declaration is only visible with _GNU_SOURCE. */
#if defined(HAVE_CANONICALIZE_FILE_NAME) \
{
/* PATH_MAX is bounded. */
char *buf, *rp, *ret;
- buf = malloc (path_max);
+ buf = (char *) malloc (path_max);
if (buf == NULL)
return NULL;
rp = realpath (filename, buf);
/* This system is a lost cause, just duplicate the filename. */
return strdup (filename);
}
+
+/* Return true when FD file descriptor exists. */
+
+int
+is_valid_fd (int fd)
+{
+#if defined(_WIN32)
+ HANDLE h = (HANDLE) _get_osfhandle (fd);
+ return h != (HANDLE) -1;
+#else
+ return fcntl (fd, F_GETFD) >= 0;
+#endif
+}