Home | History | Annotate | Line # | Download | only in unit-tests 
      1  1.3  rillig # $NetBSD: varname-dot-make-ppid.mk,v 1.3 2022/01/23 21:48:59 rillig Exp $
      2  1.1  rillig #
      3  1.3  rillig # Tests for the special .MAKE.PPID variable, which contains the process ID of
      4  1.3  rillig # make's parent process.
      5  1.1  rillig 
      6  1.3  rillig # The parent process ID must be a positive integer.
      7  1.3  rillig .if ${.MAKE.PPID:C,[0-9],,g} != ""
      8  1.3  rillig .  error
      9  1.3  rillig .elif !(${.MAKE.PPID} > 0)
     10  1.3  rillig .  error
     11  1.3  rillig .endif
     12  1.1  rillig 
     13  1.3  rillig # Ensure that the process exists.
     14  1.3  rillig _!=	kill -0 ${.MAKE.PPID}
     15  1.3  rillig 
     16  1.3  rillig # The parent process ID must be different from the process ID.  If they were
     17  1.3  rillig # the same, make would run as process 1, which is not a good idea because make
     18  1.3  rillig # is not prepared to clean up after other processes.
     19  1.3  rillig .if ${.MAKE.PPID} == ${.MAKE.PID}
     20  1.3  rillig .  error
     21  1.3  rillig .endif
     22  1.3  rillig 
     23  1.3  rillig all: .PHONY
     24