/usr/bin/gfsplot is in gerris 20131206+dfsg-18.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 | #!/bin/sh
awk -v header="$1" -v plottmp=`mktemp` '
BEGIN {
np = 0
plot=""
quote = sprintf("%c", 39)
input = sprintf("%c-%c", 39, 39)
print "set terminal wxt noraise"
}
{
if ($1 == "#" && $2 == "1:x") {
# Simulation plot
if (plot) {
# finish plot
fflush(current)
print plot
print "! rm -f " current
fflush()
}
else {
# initial setup
ns = 0
for (i = 2; i < NF; i++) {
split($i,a,":")
number[ns] = a[1]
symbol[ns++] = a[2]
}
for (i in symbol)
gsub ("\\(" symbol[i] "\\)", "($" number[i] ")", header);
}
if (header) {
# new simulation plot
current = plottmp np++
plot = header
gsub (input, quote current quote, plot)
gsub ("\\(t\\)", $(NF), plot)
}
}
else if ($2 == "time:") {
# timeseries plot
print $0 >> plottmp
fflush(plottmp)
if (plot) {
print plot
fflush()
}
else if (header) {
plot = header
gsub (input, quote plottmp quote, plot)
}
}
else if (plot)
print $0 >> current;
}
END {
if (current) {
# finish simulation plot
fflush (current)
print plot
print "! rm -f " current
}
print "! rm -f " plottmp
}' | gnuplot
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