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Bind Discord companion to exact WoW process

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This commit is contained in:
Dusk-92
2026-08-31 22:46:47 +02:00
parent 88176bccc6
commit 6c618a43d9
1 changed files with 36 additions and 13 deletions
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native/DiscordPresence/DiscordPresenceLauncher.c
+36 -13
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@@ -156,6 +156,23 @@ static int load_application_id(char *out, size_t out_size) {
return valid_application_id(out);
}
static DWORD parse_target_pid(const char *cmdline) {
const char *p;
char *end = NULL;
unsigned long value;
if (!cmdline) return 0;
p = strstr(cmdline, "--pid");
if (!p) return 0;
p += 5;
while (*p == ' ' || *p == '\t') ++p;
if (!*p) return 0;
value = strtoul(p, &end, 10);
if (end == p || value == 0 || value > 0xFFFFFFFFul) return 0;
return (DWORD)value;
}
static DWORD find_process(const char *exe_name) {
HANDLE snapshot;
PROCESSENTRY32 entry;
@@ -401,11 +418,12 @@ static void rpc_clear(DiscordRpc *rpc, DWORD pid) {
int WINAPI WinMain(HINSTANCE instance, HINSTANCE prev, LPSTR cmdline, int show) {
char application_id[64] = {0};
DiscordRpc rpc;
HANDLE wow_process = NULL;
DWORD pid = 0;
DWORD last_pid = 0;
DWORD requested_pid = 0;
int have_id;
int wait_loops = 0;
(void)instance; (void)prev; (void)cmdline; (void)show;
(void)instance; (void)prev; (void)show;
memset(&rpc, 0, sizeof(rpc));
rpc.pipe = INVALID_HANDLE_VALUE;
@@ -416,28 +434,32 @@ int WINAPI WinMain(HINSTANCE instance, HINSTANCE prev, LPSTR cmdline, int show)
log_line("Built-in Discord Application ID is invalid; presence is disabled.");
}
/* The companion no longer launches WoW. DiscordPresence.dll starts this
* process only after WoW is already running. Keep a short grace period for
* process enumeration races, then exit quietly if WoW is not present. */
pid = find_process("WoW_Modernized.exe");
/* Normal path: DiscordPresence.dll passes the exact WoW process id.
* The name scan remains only as a harmless manual/debug fallback. */
requested_pid = parse_target_pid(cmdline);
pid = requested_pid;
while (!pid && wait_loops++ < 25) {
Sleep(200);
pid = find_process("WoW_Modernized.exe");
if (!pid) Sleep(200);
}
if (!pid) {
log_line("No running WoW_Modernized.exe found; DiscordPresence exiting.");
return 0;
}
log_line("WoW_Modernized.exe detected.");
last_pid = pid;
wow_process = OpenProcess(SYNCHRONIZE, FALSE, pid);
if (!wow_process) {
log_line("Could not open the target WoW process; DiscordPresence exiting.");
return 0;
}
while ((pid = find_process("WoW_Modernized.exe")) != 0) {
log_line("WoW_Modernized.exe detected.");
while (WaitForSingleObject(wow_process, 0) == WAIT_TIMEOUT) {
Status status;
char activity[768];
last_pid = pid;
if (have_id && rpc.pipe == INVALID_HANDLE_VALUE)
rpc_connect(&rpc, application_id);
@@ -456,9 +478,10 @@ int WINAPI WinMain(HINSTANCE instance, HINSTANCE prev, LPSTR cmdline, int show)
}
if (rpc.pipe != INVALID_HANDLE_VALUE) {
rpc_clear(&rpc, last_pid ? last_pid : GetCurrentProcessId());
rpc_clear(&rpc, pid);
rpc_close(&rpc);
}
CloseHandle(wow_process);
log_line("WoW stopped; DiscordPresence exiting.");
return 0;
}