restore property that fstat(AT_FDCWD) fails with EBADF

AT_FDCWD is not a valid file descriptor, so POSIX requires fstat to
fail with EBADF. if passed to fstatat, the call would spuriously
succeed and return results for the working directory.

diff --git a/src/stat/fstat.c b/src/stat/fstat.c
index d2a828f..07f9a5d 100644 (file)
--- a/src/stat/fstat.c
+++ b/src/stat/fstat.c
@@ -6,6 +6,7 @@
 
 int fstat(int fd, struct stat *st)
 {
 
 int fstat(int fd, struct stat *st)
 {

+       if (fd<0) return __syscall_ret(-EBADF);

        return fstatat(fd, "", st, AT_EMPTY_PATH);
 }
 
        return fstatat(fd, "", st, AT_EMPTY_PATH);
 }