[Bug libc/21531] New: flose with NULL is SEGV should set errno EFAULT or EBADF

["jg at jguk dot org" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=21531

            Bug ID: 21531
           Summary: flose with NULL is SEGV should set errno EFAULT or
                    EBADF
           Product: glibc
           Version: unspecified
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: libc
          Assignee: unassigned at sourceware dot org
          Reporter: jg at jguk dot org
                CC: drepper.fsp at gmail dot com
  Target Milestone: ---

int fclose(FILE *fp);  
ERRORS

EBADF
The file descriptor underlying fp is not valid.

Current glibc doesn't follow POSIX. It causes segmentation violation (SEGV)

Should simply do

if(NULL == fp)
{
    errno = EBADF;
    return -1;
}

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