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try.sh
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try.sh
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#!/usr/bin/env bash
#
# try.sh - demonstrate IOCCC entry 2019/diels-grabsch2
#
# make sure CC is set so that when we do make CC="$CC" it isn't empty. Doing it
# this way allows us to have the user specify a different compiler in an easy
# way.
if [[ -z "$CC" ]]; then
CC="cc"
fi
make CC="$CC" all >/dev/null || exit 1
# clear screen after compilation so that only the entry is shown
clear
SHA512SUM="$(type -P sha512sum)"
SHASUM="$(type -P shasum)"
if [[ -z "$SHA512SUM" && -z "$SHASUM" ]]; then
read -r -n 1 -p "Press any key to run: ./prog: "
echo 1>&2
./prog
echo 1>&2
elif [[ -n "$SHA512SUM" ]]; then
read -r -n 1 -p "Press any key to run: $SHA512SUM prog.c: "
echo 1>&2
"$SHA512SUM" prog.c
echo 1>&2
read -r -n 1 -p "Press any key to run: ./prog: "
echo 1>&2
./prog
echo 1>&2
read -r -n 1 -p "Press any key to run: $SHA512SUM prog.c | cut -f 1 -d' ' | tee sha512sum.txt: "
echo 1>&2
"$SHA512SUM" prog.c | cut -f 1 -d' ' | tee sha512sum.txt
read -r -n 1 -p "Press any key to run: ./prog | tee prog.txt: "
echo 1>&2
./prog | tee prog.txt
echo 1>&2
read -r -n 1 -p "Press any key to run: cat sha512sum.txt prog.txt: "
echo 1>&2
cat sha512sum.txt prog.txt
echo 1>&2
read -r -n 1 -p "Press any key to run: diff -s sha512sum.txt prog.txt: "
echo 1>&2
diff -s sha512sum.txt prog.txt
rm -f sha512sum prog.txt
elif [[ -n "$SHASUM" ]]; then
# Be extra careful and don't use 'else'
read -r -n 1 -p "Press any key to run: $SHASUM -a 512 prog.c: "
echo 1>&2
"$SHASUM" -a 512 prog.c
echo 1>&2
read -r -n 1 -p "Press any key to run: ./prog: "
echo 1>&2
./prog
echo 1>&2
read -r -n 1 -p "Press any key to run: $SHASUM -a 512 prog.c | cut -f 1 -d' ' | tee sha512sum.txt: "
echo 1>&2
"$SHASUM" -a 512 prog.c | cut -f 1 -d' ' | tee sha512sum.txt
echo 1>&2
read -r -n 1 -p "Press any key to run: ./prog | tee prog.txt: "
echo 1>&2
./prog | tee prog.txt
echo 1>&2
read -r -n 1 -p "Press any key to run: cat sha512sum.txt prog.txt: "
echo 1>&2
cat sha512sum.txt prog.txt
echo 1>&2
read -r -n 1 -p "Press any key to run: diff -s sha512sum.txt prog.txt: "
echo 1>&2
diff -s sha512sum.txt prog.txt
rm -f sha512sum prog.txt
fi