/usr/share/gnudatalanguage/lib/popd.pro is in libgnudatalanguage0 0.9.7-6.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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; NAME: POPD
;
; PURPOSE:
; Change the current working directory to the top entry of the
; directory stack handled by PUSHD and POPD and remove it from the stack.
;
;
; CATEGORY:
; Directory management
;
;
; CALLING SEQUENCE:
; popd
;
;
; MODIFICATION HISTORY:
; 12-Jan-2006 : written by Pierre Chanial
;
; LICENCE:
; Copyright (C) 2006, P. Chanial
; This program is free software; you can redistribute it and/or modify
; it under the terms of the GNU General Public License as published by
; the Free Software Foundation; either version 2 of the License, or
; (at your option) any later version.
;
;-
pro popd
common dir_stack, nstack, stack
on_error, 2
if n_elements(nstack) eq 0 then nstack = (stack = 0)
if nstack eq 0 then begin
message, 'Directory stack is empty.'
endif
cd, stack[0]
if --nstack eq 0 then begin
stack = 0
endif else begin
stack = stack[1:*]
endelse
end
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