kc3-lang/automake/t/built-sources-fork-bomb.sh

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• Hash : 5ddf1007
  Author :
  Date : 2012-10-27T16:41:39
  

  tests: prefer including 'test-init.sh' rather than './defs'
  
  This is a follow-up to today's commit v1.12.4-22-g0610fc8,
  "tests: prepare to move ./defs to t/ax/test-init.sh"
  
  * All tests: To run the common setup, use the command:
  
      . test-init.sh
  
  instead of the older, "historical" one:
  
      . ./defs || exit 1
  
  Note that the "|| exit 1" wasn't really useful, since the 'errexit'
  shell flag is in effect in both './defs' and 'test-init.sh', and all
  the known shells that are good enough to run the automake testsuite
  do automatically exit with error when a sourced file cannot be found
  (at least, they do so in non-interactive mode, which is the only
  mode that concerns us in the testsuite).
  
  * t/ax/tap-summary-aux.sh, t/ax/testsuite-summary-checks.sh: Likewise.
  
  * gen-testsuite-part: Do the same in the generated tests.
  
  Signed-off-by: Stefano Lattarini <stefano.lattarini@gmail.com>
  

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• t/built-sources-fork-bomb.sh

• #! /bin/sh
  # Copyright (C) 2012 Free Software Foundation, Inc.
  #
  # 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, or (at your option)
  # any later version.
  #
  # This program is distributed in the hope that it will be useful,
  # but WITHOUT ANY WARRANTY; without even the implied warranty of
  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  # GNU General Public License for more details.
  #
  # You should have received a copy of the GNU General Public License
  # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  
  # Due to how the handling of $(BUILT_SOURCES) is implemented in Automake-NG,
  # a recursive make call in the recipe of any $(BUILT_SOURCES) (or of any of
  # its prerequisites) might cause an infinite recursion (complete with fork
  # bomb, yuck) if not handled correctly.  Verify that this doesn't happen.
  # For more background, see:
  # <http://lists.gnu.org/archive/html/help-smalltalk/2012-08/msg00027.html>
  # <http://lists.gnu.org/archive/html/automake-patches/2012-08/msg00052.html>
  # Backported to improve coverage of mainline Automake.
  
  required=GNUmake
  . test-init.sh
  
  echo AC_OUTPUT >> configure.ac
  
  cat > Makefile.am << 'END'
  BUILT_SOURCES = foo
  .PHONY: build-foo
  build-foo:
  	echo OK > foo
  foo:
  	$(MAKE) build-foo
  
  # If the bug is still present, we want this test to fail, not to actually
  # go fork bomb and potentially crash the user machine.  Take care of that.
  
  is_too_deep := $(shell test $(MAKELEVEL) -lt 10 && echo no)
  
  ## Extra indentation here required to avoid confusing Automake.
   ifeq ($(is_too_deep),no)
     # All is ok.
   else
     $(error ::OOPS:: Recursion too deep, $(MAKELEVEL) levels)
   endif
  END
  
  $ACLOCAL
  $AUTOMAKE -Wno-portability
  $AUTOCONF
  
  ./configure
  
  $MAKE -n foo >output 2>&1 || { cat output; exit 1; }
  cat output
  test ! -f foo
  # Guard against possible infinite recursion.
  $FGREP '::OOPS::' output && exit 1
  
  $MAKE foo >output 2>&1 || { cat output; exit 1; }
  cat output
  $MAKE foo
  # Guard against possible infinite recursion.
  $FGREP '::OOPS::' output && exit 1
  
  :
  

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