diff -rNup bwbar-1.2/Makefile bwbar-shm-1.2/Makefile
--- bwbar-1.2/Makefile	2001-05-06 00:51:48.000000000 +0200
+++ bwbar-shm-1.2/Makefile	2003-09-30 16:37:08.000000000 +0200
@@ -11,6 +11,12 @@
 ##
 ## -----------------------------------------------------------------------
 
+## -----------------------------------------------------------------------
+##
+## Applied patch for use Shared Memory in Bwbar
+##
+## -----------------------------------------------------------------------
+
 PROGS = bwbar
 
 CC	= gcc
@@ -29,5 +35,5 @@ distclean: clean
 bwbar: bwbar.c
 	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $< $(LIBS)
 
-
-
+test_shm: test_shm.c
+	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $< $(LIBS)
diff -rNup bwbar-1.2/bwbar.c bwbar-shm-1.2/bwbar.c
--- bwbar-1.2/bwbar.c	2001-09-22 00:33:35.000000000 +0200
+++ bwbar-shm-1.2/bwbar.c	2003-09-30 16:34:46.000000000 +0200
@@ -19,6 +19,15 @@
  *
  */
 
+/*
+ * Applied patch for store data in Shared Memory 
+ * 
+ * 2003 - Sergi Coll (sergi at sim00 net) 
+ * 
+ * http://www.sim00.net/
+ *
+ */
+
 #define _GNU_SOURCE
 #include <stdio.h>
 #include <errno.h>
@@ -31,6 +40,16 @@
 #include <getopt.h>
 #include <png.h>
 
+/* start - Shared Memory patch */ 
+
+#include <sys/types.h>
+#include <sys/mman.h>
+#include <sys/ipc.h>
+#include <sys/shm.h>
+#include <fcntl.h>
+
+/* end - Shared Memory patch */
+
 void skipline(FILE *f)
 {
   int ch;
@@ -185,6 +204,15 @@ void usage(int err)
 
 int main(int argc, char *argv[])
 {
+  /* start - Shared Memory patch */
+
+  int shmid;
+  unsigned int i;
+  char *shm, *s;
+  char texte_sortida[100];
+
+  /* end - Shared Memory patch */
+
   FILE *pnd;
   char *interface;
   struct ifinfo {
@@ -214,6 +242,24 @@ int main(int argc, char *argv[])
 
   program = argv[0];
 
+  /* start - Shared Memory patch */
+
+  /* Create the segment. */
+
+  if ((shmid = shmget(5678, 100, IPC_CREAT | 0666)) < 0) {
+      perror("shmget");
+      exit(1);
+  }
+ 
+  /* Now we attach the segment to our data space. */
+
+  if ((shm = shmat(shmid, NULL, 0)) == (void *) -1) {
+      perror("shmat");
+      exit(1);
+  }           
+
+  /* end - Shared Memory patch */
+
   while ( (opt = getopt_long(argc, argv, "iof:p:t:x:y:b:kMGh", longopts, NULL)) != -1 ) {
     switch ( opt ) {
     case 'i':
@@ -319,6 +365,7 @@ int main(int argc, char *argv[])
     /**** Begin code that generates output ****/
 
     if ( !first ) {
+      
       FILE *ubar, *pngmaker;
 
       timedelta = (double)(t_now.tv_sec - t_last.tv_sec) + 
@@ -327,7 +374,7 @@ int main(int argc, char *argv[])
       bwout = (bout-lbout)*8/timedelta;
 
       bwmeasure = measure_input ? bwin : bwout;
-      
+
       ubar = fopen(t_tmp, "w");
       pngmaker = fopen(g_tmp, "w");
       if ( ubar ) {
@@ -340,6 +387,24 @@ int main(int argc, char *argv[])
 	fclose(pngmaker);
 	rename(g_tmp, graphics_file);
       }
+
+     /* start - Shared Memory patch */
+
+     /* Now put some things into the memory for the other process to read. */
+
+     sprintf (texte_sortida, "Current bandwidth utilization %6.2f %s", bwmeasure/unit, unit_name);
+	
+     s = shm;
+
+     for (i=0; i < strlen(texte_sortida); i++) {
+	sprintf(s,"%c",texte_sortida[i]);
+	*s++;
+     } 
+
+     s = NULL;
+
+    /* end - Shared Memory patch */
+
     } else {
       first = 0;
     }
diff -rNup bwbar-1.2/test_shm.c bwbar-shm-1.2/test_shm.c
--- bwbar-1.2/test_shm.c	1970-01-01 01:00:00.000000000 +0100
+++ bwbar-shm-1.2/test_shm.c	2003-09-30 16:33:33.000000000 +0200
@@ -0,0 +1,47 @@
+/*
+ * shm-client - client program to demonstrate shared memory.
+ */
+
+#include <sys/types.h>
+#include <sys/ipc.h>
+#include <sys/shm.h>
+#include <stdio.h>
+#define SHMSZ    100 
+main()
+{
+    int shmid;
+    key_t key;
+    char *shm, *s;
+    /*
+     * We need to get the segment named
+     * "5678", created by the server.
+     */
+    key = 5678;
+    /*
+     * Locate the segment.
+     */
+    if ((shmid = shmget(key, SHMSZ, 0666)) < 0) {
+        perror("shmget");
+        exit(1);
+    }
+    /*
+     * Now we attach the segment to our data space.
+     */
+    if ((shm = shmat(shmid, NULL, 0)) == (char *) -1) {
+        perror("shmat");
+        exit(1);
+    }
+    /*
+     * Now read what the server put in the memory.
+     */
+    for (s = shm; *s != NULL; s++)
+        putchar(*s);
+    putchar('\n');
+    /*
+     * Finally, change the first character of the 
+     * segment to '*', indicating we have read 
+     * the segment.
+     */
+    /* *shm = '*'; */
+    exit(0);
+}