tools/RunInPar

#!/usr/bin/perl

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# Copyright (c) 2001 VMware, Inc.  All rights reserved.
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### RunInPar
### Runs shell commands in a text file in parallel
### author: Derek Bruening   April 2001
###
### Must place "-SPLIT" on its own line to separate processors' work

$usage = "Usage: $0 <file>\n";
if ($#ARGV < 0) {
    print $usage;
    exit;
}
$infile = shift;

$proc = 0;
$line = 0;
open(IN, "< $infile") || die "Error: Couldn't open $infile for input\n";
open(OUT, "> .#mp-$proc") || die "Error in opening output file\n";
while (<IN>) {
    next if /^\#/;
    next if /^$/;
    if ($_ =~ /^-SPLIT$/) {
        close(OUT);
        $proc++;
        open(OUT, "> .#mp-$proc") || die "Error in opening output file\n";
    } else {
        print OUT $_;
    }
}
close(IN);
close(OUT);

@subs = `ls .#mp-*`;
foreach $f (@subs) {
    chop $f; # this affects @subs, only do it once!
    unless (fork()) {
        exec("/bin/csh -s < $f");
        exit(0);
    }
}
foreach $f (@subs) {
    wait;
}

# clean up
system("rm .#mp-*");