add stmpdupHEADmaster

2 files changed, 122 insertions, 0 deletions

diff --git a/Makefile b/Makefile
index c51f3b4..d8239c0 100644
--- a/Makefile
+++ b/Makefile
@@ -17,6 +17,9 @@ $(BINDIR):
 $(BINDIR)/stmusic: $(SRCDIR)/stmusic.c | $(BINDIR)
 	$(CC) $(CFLAGS) -o $@ $< -lmpdclient
 
+$(BINDIR)/stmpdup: $(SRCDIR)/stmpdup.c | $(BINDIR)
+	$(CC) $(CFLAGS) -o $@ lib/util.c $< -lmpdclient
+
 $(BINDIR)/sttorrent: $(SRCDIR)/sttorrent.c | $(BINDIR)
 	$(CC) $(CFLAGS) -o $@ lib/util.c lib/cjson/cJSON.c $< -lcurl
 
diff --git a/src/stmpdup.c b/src/stmpdup.c
new file mode 100644
index 0000000..b724157
--- /dev/null
+++ b/src/stmpdup.c
@@ -0,0 +1,119 @@
+/* Copyright (C) 2025 awy <awy@awy.one>
+
+   stmpdup is free software: you can redistribute it and/or
+   modify it under the terms of the GNU General Public License
+   as published by the Free Software Foundation,
+   either version 3 of the License, or (at your option) any later version.
+
+   stmpdup is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public
+   License along with stmpdup. If not, see
+   <https://www.gnu.org/licenses/>. */
+
+/* cmd_idle and cmd_idleloop functions are taken from the
+   MPC <https://github.com/MusicPlayerDaemon/mpc> */
+
+#define _POSIX_C_SOURCE 200112L
+#include <ctype.h>
+#include <mpd/client.h>
+#include <signal.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <dirent.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "../lib/util.h"
+
+int
+find_pid_by_name(const char *process_name)
+{
+  DIR *dir = opendir("/proc");
+  if (!dir) return -1;
+
+  struct dirent *entry;
+  while ((entry = readdir(dir)) != NULL) {
+    if (!isdigit(entry->d_name[0])) continue;
+
+    char path[256], name[256];
+    snprintf(path, sizeof(path), "/proc/%s/comm", entry->d_name);
+
+    FILE *fp = fopen(path, "r");
+    if (!fp) continue;
+
+    if (fgets(name, sizeof(name), fp)) {
+      name[strcspn(name, "\n")] = 0;
+      if (strcmp(name, process_name) == 0) {
+        fclose(fp);
+        closedir(dir);
+        return atoi(entry->d_name);
+      }
+    }
+    fclose(fp);
+  }
+  closedir(dir);
+  return -1;
+}
+
+
+int cmd_idle(struct mpd_connection *connection)
+{
+  enum mpd_idle idle = 0;
+  pid_t wbarpid;
+
+  idle = idle == 0 ? mpd_run_idle(connection)
+    : mpd_run_idle_mask(connection, idle);
+  if (idle == 0 &&
+    mpd_connection_get_error(connection) != MPD_ERROR_SUCCESS)
+    printf("error");
+
+  for (unsigned j = 0;; ++j) {
+    enum mpd_idle i = 1 << j;
+    const char *name = mpd_idle_name(i);
+
+    if (name == NULL)
+      break;
+
+    if (idle & i) {
+      wbarpid = find_pid_by_name("waybar");
+      if (wbarpid == -1)
+        die("no waybar running");
+
+      kill(wbarpid, SIGRTMIN+11);
+    }
+
+  }
+
+  return 0;
+}
+
+int
+cmd_idleloop(struct mpd_connection *connection)
+{
+  while (true) {
+    int ret = cmd_idle(connection);
+    fflush(stdout);
+    if (ret != 0)
+      return ret;
+  }
+}
+
+int
+main(void)
+{
+  struct mpd_connection *conn;
+
+  conn = mpd_connection_new(NULL, 0, 30000);
+  if (mpd_connection_get_error(conn) != MPD_ERROR_SUCCESS) {
+    fprintf(stderr, "MPD connection error: %s\n",
+            mpd_connection_get_error_message(conn));
+    return 1;
+  }
+
+  cmd_idleloop(conn);
+  return 0;
+}