--- mutt-x.y.z/PATCHES~	never
+++ mutt-x.y.z/PATCHES	Thu Jun 13 16:25:05 CDT 2002
@@ -1,0 +1 @@
+dgc.fmtpipe.1
diff -Pur mutt-1.5.1-base/muttlib.c mutt-1.5.1/muttlib.c
--- mutt-1.5.1-base/muttlib.c	Tue Mar 26 16:47:06 2002
+++ mutt-1.5.1/muttlib.c	Thu Jun 13 15:28:23 2002
@@ -924,6 +924,10 @@
   char prefix[SHORT_STRING], buf[LONG_STRING], *cp, *wptr = dest, ch;
   char ifstring[SHORT_STRING], elsestring[SHORT_STRING];
   size_t wlen, count, len;
+  pid_t pid;
+  FILE *filter;
+  int n, dofilter = 0;
+  char *recycler;
 
   prefix[0] = '\0';
   destlen--; /* save room for the terminal \0 */
@@ -1096,6 +1100,20 @@
       wptr++;
       wlen++;
     }
+    else if (*src == '|')
+    {
+      if (*++src != '\0')
+      {
+	/* Not end of string - copy '|' */
+	*wptr++ = '|';
+	wlen++;
+      }
+      else
+      {
+	/* End of string - wants to be filtered */
+	dofilter = 1;
+      }
+    }
     else
     {
       *wptr++ = *src++;
@@ -1103,6 +1121,39 @@
     }
   }
   *wptr = 0;
+
+  /* Filter this string? */
+  if (dofilter)
+  {
+    wptr = dest;	/* reset write ptr */
+    wlen = (flags & M_FORMAT_ARROWCURSOR && option (OPTARROWCURSOR)) ? 3 : 0;
+    if (pid = mutt_create_filter(dest, NULL, &filter, NULL))
+    {
+      n = fread(dest, 1, destlen /* already decremented */, filter);
+      fclose(filter);
+      dest[n] = '\0';
+      if (pid != -1)
+	mutt_wait_filter(pid);
+
+      /* If ends with '%', recycle through FormatString :P */
+      /* To really end with '%', use "%%" */
+      if (dest[--n] == '%')
+      {
+	dest[n] = '\0';		/* remove '%' */
+	if (dest[--n] != '%')
+	{
+	  recycler = safe_strdup(dest);
+	  mutt_FormatString(dest, destlen++, recycler, callback, data, flags);
+	  safe_free((void **) &recycler);
+	}
+      }
+    }
+    else
+    {
+      /* Filter failed; erase write buffer */
+      *wptr = '\0';
+    }
+  }
 
 #if 0
   if (flags & M_FORMAT_MAKEPRINT)