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• Syscalls-logic

Syscall-close-logic

Signature

(syscall-close-logic fd x86) → (mv * x86)

From the close(2) man page (Linux):

close() closes a file descriptor, so that it no longer refers to any file and may be reused.

RETURN VALUES

close() returns zero on success. On error, -1 is returned, and errno is set appropriately.

Definitions and Theorems

Function: syscall-close-logic

(defun syscall-close-logic (fd x86)
 (declare (xargs :stobjs (x86)))
 (declare (ignorable fd x86))
 (declare (xargs :guard (integerp fd)))
 (let ((__function__ 'syscall-close-logic))
  (declare (ignorable __function__))
  (b*
   ((obj-fd-field (read-x86-file-des fd x86))
    ((when (not (file-descriptor-fieldp obj-fd-field)))
     (b*
      ((-
        (cw
         "~%Error: File Descriptor Field ill-formed. Maybe these books were ~
not built with X86ISA_EXEC set to t? See :doc x86isa-build-instructions.~%~%"))
       (x86
        (!ms
         (list
          (rip x86)
          "File Descriptor Field ill-formed. Maybe these books were
not built with X86ISA_EXEC set to t? See :doc x86isa-build-instructions."
          (ms x86))
         x86)))
      (mv -1 x86)))
    (x86 (delete-x86-file-des fd x86)))
   (mv 0 x86))))