--- a/src/main.c Sun Mar 29 13:26:00 2026 +0200
+++ b/src/main.c Sun Mar 29 15:17:28 2026 +0200
@@ -37,14 +37,16 @@
#include <time.h>
#include <getopt.h>
#include <locale.h>
+#include <sys/stat.h>
int get_settings(int argc, char **argv, Settings *settings) {
char *valid;
unsigned long int time, port;
uint8_t timeunit = 60;
size_t len;
+ bool port_set = false;
- for (int opt ; (opt = getopt(argc, argv, "a:bc:Fhp:rsS:t:Uv")) != -1 ;) {
+ for (int opt ; (opt = getopt(argc, argv, "a:bc:Fhp:rsS:t:uUv")) != -1 ;) {
switch (opt) {
case 'c':
settings->continuepgn = optarg;
@@ -61,6 +63,14 @@
case 'F':
settings->disableflip = true;
break;
+ case 'u':
+ if (port_set) {
+ fprintf(stderr, "Cannot use Unix domain sockets "
+ "when a TCP port was specified.\n");
+ return 1;
+ }
+ settings->usedomainsocket = true;
+ break;
case 'U':
settings->unicode = false;
break;
@@ -87,6 +97,15 @@
}
break;
case 'p':
+ if (port_set) {
+ fprintf(stderr, "Cannot use -p twice.\n");
+ return 1;
+ }
+ if (settings->usedomainsocket) {
+ fprintf(stderr, "Cannot specify TCP port "
+ "when using Unix domain sockets.\n");
+ return 1;
+ }
port = strtol(optarg, &valid, 10);
if (port < 1025 || port > 65535 || *valid != '\0') {
fprintf(stderr,
@@ -96,6 +115,7 @@
return 1;
} else {
settings->port = (short) port;
+ port_set = true;
}
break;
case 'v':
@@ -111,6 +131,7 @@
" -c <PGN file> Continue the specified game\n"
" -h This help page\n"
" -p TCP port to use (default: 27015)\n"
+" -u Use Unix domain socket instead of TCP\n"
" -U Disables unicode pieces\n"
" -v Print version information and exits\n"
"\nServer options\n"
@@ -119,13 +140,16 @@
" -r Distribute color randomly\n"
" -t <time> Specifies time limit (default: no limit)\n"
"\nHot seat\n"
-" -s Play a hot seat game (no client/server)\n"
+" -s Play a hot seat game (network options are ignored)\n"
" -F Do not automatically flip the board in hot seat games\n"
"\nNotes\n"
"The time unit for -a is seconds and for -t minutes by default. To "
"specify\nseconds for the -t option, use the s suffix.\n"
"Example: -t 150s\n\n"
-"Use '-' for PGN files to read PGN data from standard input\n"
+"Use '-' for PGN files to read PGN data from standard input\n\n"
+"When playing over Unix domain socket, the HOST denotes the socket path.\n"
+"When the path doest not exist, a game is created. Otherwise, the program\n"
+"joins the existing game. When HOST is omitted, /tmp/chess.sock is used.\n"
);
exit(0);
}
@@ -145,22 +169,50 @@
return 1;
}
}
+
+ if (settings->usedomainsocket) {
+ if (!settings->serverhost) {
+ settings->serverhost = "/tmp/chess.sock";
+ }
+ struct stat st;
+ if (stat(settings->serverhost, &st) == 0) {
+ if (S_ISSOCK(st.st_mode)) {
+ settings->ishost = false;
+ } else {
+ fprintf(stderr, "%s is not a Unix domain socket.\n",
+ settings->serverhost);
+ return 1;
+ }
+ } else {
+ settings->ishost = true;
+ }
+ } else {
+ settings->ishost = !settings->serverhost;
+ }
return 0;
}
-static Settings default_settings() {
- Settings settings = {0};
+static Settings settings;
+
+static void init_settings(void) {
+ memset(&settings, 0, sizeof(settings));
settings.gameinfo.servercolor = WHITE;
settings.port = 27015;
settings.unicode = !!setlocale(LC_CTYPE, "C.UTF-8");
- return settings;
+}
+
+static void cleanup() {
+ endwin();
+ if (settings.usedomainsocket && settings.ishost) {
+ remove(settings.serverhost);
+ }
}
int main(int argc, char **argv) {
srand(time(NULL));
-
- Settings settings = default_settings();
+
+ init_settings();
if (get_settings(argc, argv, &settings)) {
return 1;
}
@@ -177,14 +229,14 @@
endwin();
return EXIT_FAILURE;
}
- atexit((void(*)())endwin);
+ atexit(cleanup);
int exitcode;
if (settings.singlemachine) {
game_play_singlemachine(&settings);
exitcode = EXIT_SUCCESS;
} else {
- exitcode = is_server(&settings) ?
+ exitcode = settings.ishost ?
server_run(&settings) : client_run(&settings);
}
