The macros in the sample exec_process_macros.cfg configuration file below are for executing processes in a special way--to suppress execution (when testing, for example), to wait on another process, or for other special purposes.
///////////////////////////////////////////////////////////////////////////////
// exec process macros - process execution
///////////////////////////////////////////////////////////////////////////////
donothing // nullop
=piktnullchar
///////////////////////////////////////////////////////////////////////////////
// the doexec define lets us control whether actions are exec'ed else
// a report of intent is emailed only; in earlier versions of PIKT,
// this conditionality was handled this way in alarms.cfg:
//
// #ifdef doexec
// exec wait "=chgrp $grp $dir"
// #elsedef
// output mail "=chgrp $grp $dir"
// #endifdef
//
// with the macros below, we can now achieve the same effect by
// replacing the above five lines with just this one line:
//
// =execwait "=chgrp $grp $dir"
//
#ifdef doexec
exec exec
execwait exec wait
#elsedef
exec output mail
execwait output mail
#endifdef
// see the sample alarms.cfg for many more examples of this trick
///////////////////////////////////////////////////////////////////////////////
waitexec(P, C, T, W) // wait for termination of one process before
// doing a subsequent exec or exec wait
// (P) is the process (e.g., "=piktc")
// (C) is the subsequent comment (e.g.,
// "=piktc -iv ALL -H downsys"
// (T) is the number of seconds to pause between
// (P) checks (e.g., 60)
// (W) is whether do 'exec wait', else just do 'exec'
// (e.g., #true())
// sample use: =waitexec("piktc",
"piktc -iv ALL -H downsys",
60, #false())
while #pid((P)) != #nil()
pause (T)
endwhile
if (W)
=execwait (C)
else
=exec (C)
endif
///////////////////////////////////////////////////////////////////////////////
[For more examples, see Samples.]
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