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#!/opt/local/bin/gawk -f
# Usage: scramble.awk file
#
# Copyright 1999 Stephan Schulz, schulz@informatik.tu-muenchen.de
#
# Read file line by line and output the lines in random order.
#
function get_pid( tmp)
{
tmp = PROCINFO["pid"];
# getline tmp < "/dev/pid";
# close("/dev/pid");
if(!tmp)
{
print "scramble.awk: Cannot get PID ?!?" > "/dev/stderr";
exit 1;
}
return tmp;
}
function get_hostname( pipe, tmp)
{
pipe = "hostname";
pipe | getline tmp;
close(pipe);
return tmp;
}
function get_tmpname( file)
{
file = "__scramble__" get_hostname() "__" get_pid() "__";
return file;
}
BEGIN{
srand(10);
}
{
key = rand();
while(array[key])
{
key = rand();
}
array[key] = $0;
}
END{
procid = get_pid();
file = get_tmpname();
for(i in array)
{
printf("%1.12f %s\n", i, array[i]) > file ;
}
close(file);
cmd = "sort " file;
while ((cmd | getline tmp) > 0)
{
print substr(tmp,16);
}
system("rm " file);
}
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