Patch to allow custom command for bar center text

config.h

@@ -1,6 +1,7 @@
 /* See LICENSE file for copyright and license details. */
 
 /* appearance */
+static const char center_command[] = "/home/aselimov/bin/title_text.sh";
 static const unsigned int borderpx = 2; /* border pixel of windows */
 static const unsigned int snap = 32;    /* snap pixel */
 static const unsigned int gappih = 15;  /* horiz inner gap between windows */

dwm.c

@@ -51,6 +51,7 @@
 #include "util.h"
 
 /* macros */
+#define MAX_LINE_LENGTH 1024
 #define BUTTONMASK (ButtonPressMask | ButtonReleaseMask)
 #define CLEANMASK(mask)                                                        \
   (mask & ~(numlockmask | LockMask) &                                          \
@@ -198,6 +199,7 @@ typedef struct {
 } Rule;
 
 /* function declarations */
+char *exec_command_last_line(const char *command);
 static void applyrules(Client *c);
 static int applysizehints(Client *c, int *x, int *y, int *w, int *h, int *bw,
                           int interact);
@@ -899,20 +901,20 @@ void drawbar(Monitor *m) {
   }
   w = blw = TEXTW(m->ltsymbol);
   drw_setscheme(drw, scheme[SchemeTagsNorm]);
-  x = drw_text(drw, x, 0, w, bh, lrpad / 2, m->ltsymbol, 0);
+  static char text[MAX_LINE_LENGTH];
-
+  strcpy(text, exec_command_last_line(center_command));
+  int center_length = TEXTW(text);
+  int center_x = (m->ww - center_length) / 2;
+  x = drw_text(drw, x, 0, center_x - x, bh, lrpad / 2, m->ltsymbol, 0);
+  x = center_x;
   if ((w = m->ww - tw - x) > bh) {
     if (m->sel) {
-      //			drw_setscheme(drw, scheme[m == selmon ?
+      drw_setscheme(drw, scheme[SchemeNorm]);
-      // SchemeInfoSel : SchemeInfoNorm]);
+      drw_text(drw, x, 0, w, bh, lrpad / 2, text, 0);
-      drw_text(drw, x, 0, w, bh, lrpad / 2, " ", 0);
-      if (m->sel->isfloating)
-        drw_rect(drw, x + boxs, boxs, boxw, boxw, m->sel->isfixed, 0);
     } else {
-      drw_setscheme(drw, scheme[SchemeInfoNorm]);
-      drw_rect(drw, x, 0, w, bh, 1, 1);
     }
   }
+
   drw_map(drw, m->barwin, 0, 0, m->ww, bh);
 }
 
@@ -1373,8 +1375,8 @@ void moveresize(const Arg *arg) {
              &wAbs, &h, &hAbs) != 8)
     return;
 
-  /* compute new window position; prevent window from be positioned outside the
+  /* compute new window position; prevent window from be positioned outside
-   * current monitor */
+   * the current monitor */
   nw = c->w + w;
   if (wAbs == 'W')
     nw = w < selmon->mw - 2 * c->bw ? w : selmon->mw - 2 * c->bw;
@@ -1603,9 +1605,11 @@ void run(void) {
   XEvent ev;
   /* main event loop */
   XSync(dpy, False);
-  while (running && !XNextEvent(dpy, &ev))
+  int ticks = 0;
+  while (running && !XNextEvent(dpy, &ev)) {
     if (handler[ev.type])
       handler[ev.type](&ev); /* call handler */
+  }
 }
 
 void scan(void) {
@@ -2601,3 +2605,38 @@ void runAutostart(void) {
   system("cd ~/.dwm; ./autostart_blocking.sh");
   system("cd ~/.dwm; ./autostart.sh &");
 }
+
+char *exec_command_last_line(const char *command) {
+  static char last_line[MAX_LINE_LENGTH];
+
+  if (!command) {
+    return NULL;
+  }
+
+  FILE *pipe = popen(command, "r");
+  if (!pipe) {
+    return NULL;
+  }
+
+  char buffer[MAX_LINE_LENGTH];
+  int found_line = 0;
+
+  // Read all lines and keep track of the last non-empty one
+  while (fgets(buffer, sizeof(buffer), pipe) != NULL) {
+    // Remove trailing newline if present
+    size_t len = strlen(buffer);
+    if (len > 0 && buffer[len - 1] == '\n') {
+      buffer[len - 1] = '\0';
+      len--;
+    }
+
+    // Skip empty lines
+    if (len > 0) {
+      strcpy(last_line, buffer);
+      found_line = 1;
+    }
+  }
+
+  pclose(pipe);
+  return found_line ? last_line : NULL;
+}