mirror of https://github.com/dirtbags/moth.git
Console work + modem.c
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92c69c2226
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@ -8,6 +8,7 @@ if ! [ -f $BASE/salt ]; then
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dd if=/dev/urandom count=1 | md5sum - > $BASE/salt
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fi
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clear
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printf '\017'
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read salt < $BASE/salt
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esc () {
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@ -64,28 +65,52 @@ elif ! [ -d $BASE/$hash ]; then
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fini
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fi
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clear
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read -r name < $BASE/$hash/.name
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printf "%s answer: " "$name"
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read -r answer
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echo
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match=$(awk -v ans="$answer" '(substr($0, length($1)+2) == ans) { print substr(FILENAME, 6, length(FILENAME)-17) " " $1; }' /opt/*/answers.txt)
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if [ -z "$match" ]; then
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echo "That is not a correct answer."
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fini
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fi
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printf 'Welcome back, [34m%s[0m.\n' "$name"
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while true; do
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printf "[32mp2>[0m "
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read -r answer
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case "$answer" in
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\?|help)
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cat <<EOD
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[32m Help
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----------------------------------------------------------[0m
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Type "[34mquit[0m" to leave the p2 shell.
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Any other string is checked as an answer. If the answer
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is correct, you are awarded points and the scoreboard will
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update within 10 seconds. Check the puzzles overview to
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see if your answer unlocked a new puzzle.
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EOD
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continue
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;;
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quit)
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break
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;;
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esac
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match=$(awk -v ans="$answer" '(substr($0, length($1)+2) == ans) { print substr(FILENAME, 6, length(FILENAME)-17) " " $1; }' /opt/*/answers.txt)
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if [ -z "$match" ]; then
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echo 'That is not a correct answer. Type "[34mhelp[0m" for help.'
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continue
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fi
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cat=${match% *}
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points=${match#* }
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fn=$BASE/$hash/$cat.$points
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if [ -f $fn ]; then
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echo "You've already received points for this answer."
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else
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> $fn
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echo "You get $points more points in the $cat category."
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# run puzzles.cgi
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# update scoreboard
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fi
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fini
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cat=${match% *}
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points=${match#* }
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fn=$BASE/$hash/$cat.$points
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if [ -f $fn ]; then
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echo "You've already received points for this answer."
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else
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> $fn
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echo "You get $points more points in the $cat category."
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# run puzzles.cgi
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# update scoreboard
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fi
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done
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@ -0,0 +1 @@
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modem:
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@ -0,0 +1,60 @@
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#include <unistd.h>
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#include <stdlib.h>
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#define NOISE_PROB 300
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#define NOISE_BITS 16
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int badbits = 0;
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char
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line_noise(char c)
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{
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int i = 7;
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while (badbits && (i >= 0)) {
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c = c ^ ((rand() % 2) << i);
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badbits -= 1;
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i -= 1;
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}
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if (rand() % NOISE_PROB == 0) {
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badbits = rand() % NOISE_BITS;
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}
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return c;
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}
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int
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main(int argc, char *argv[])
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{
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char c;
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ssize_t ret;
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int baud = 0;
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useconds_t usec;
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if (argv[1]) {
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baud = atoi(argv[1]);
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}
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if (! baud) {
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baud = 1200;
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}
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srandom(getpid());
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/*
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N81 uses 1 stop bit, and 1 parity bit. That works out to
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exactly 10 bits per byte.
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*/
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usec = 10000000 / baud;
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while (1) {
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ret = read(0, &c, 1);
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if (ret != 1) {
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break;
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}
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c = line_noise(c);
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write(1, &c, 1);
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usleep(usec);
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}
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return 0;
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}
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