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# T2 SDE: package/.../embutils/free.patch
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A memory foodprint overview can be quite handy.

  Rene Rebe <rene@exactcode.de>

--- embutils-0.17/Makefile	2005-01-31 19:06:38.000000000 +0100
+++ embutils-0.17-free/Makefile	2005-02-07 01:38:31.322742920 +0100
@@ -13,7 +13,7 @@
 install sosrm soscp sosmv sosln soslns md5sum sleep2 allinone kill uniq \
 dd tr mesg write touch du tail uuencode uudecode nohup nice cmp mktemp \
 truncate strings test date mount printenv umount pivot_root insmod rmmod \
-lsmod
+lsmod free
 
 ARCH:=$(shell uname -m | sed 's/i[4-9]86/i386/')
 
--- /dev/null	2005-02-03 08:15:19.790903464 +0100
+++ embutils-0.17-free/free.c	2005-02-07 01:35:28.941469088 +0100
@@ -0,0 +1,90 @@
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/vfs.h>
+#include <stdlib.h>
+
+/* Rene Rebe <rene@exactcode.de>
+
+/* TODO: maybe support some options ... */
+
+#include "fmt_str.c"
+#include "fmt_ulong.c"
+#include "fmt_ulongpadright.c"
+
+int main(int argc, char* argv[]) {
+  int fd=open("/proc/meminfo",O_RDONLY);
+  char buf[4096];
+  int len=read(fd,buf,4096);
+  char *line, *max;
+
+  struct meminfo_t {
+    const char* tag;
+    int val;} meminfo [] = {
+    "MemTotal", 0,
+    "MemFree", 0,
+    "Buffers", 0,
+    "Cached", 0,
+    "SwapTotal", 0,
+    "SwapFree", 0,
+    0, 0};
+
+  line = buf;
+  max = buf + len;
+  while (line < max)
+  {
+    struct meminfo_t* i = &meminfo[0];
+    char* tmp2 = strchr(line, ' ');
+    *(--tmp2) = 0;
+
+    for (;i->tag; i++) {
+      if ( strcmp(line, i->tag) == 0 ) {
+        tmp2++; while (*tmp2 == ' ') tmp2++;
+	line = tmp2;
+	tmp2 = strchr(tmp2, '\n');
+	*tmp2 = 0;
+	i->val = atol(line);
+        line = tmp2 + 1;
+	break;
+      }
+    }
+    if (i->tag == 0)
+      line = strchr(tmp2 + 1, '\n') + 1;
+  }
+
+  len = 0;
+  len+=fmt_str (buf+len,"             total       used       free     shared    buffers     cached\n");
+
+  len+=fmt_str (buf+len, "Mem:    ");
+  len+=fmt_ulongpadright(buf+len,meminfo[0].val,10);
+  buf[len]=' '; ++len;
+  len+=fmt_ulongpadright(buf+len,meminfo[0].val - meminfo[1].val,10);
+  buf[len]=' '; ++len;
+  len+=fmt_ulongpadright(buf+len,meminfo[1].val,10);
+  buf[len]=' '; ++len;
+  len+=fmt_ulongpadright(buf+len,0,10);
+  buf[len]=' '; ++len;
+  len+=fmt_ulongpadright(buf+len,meminfo[2].val,10);
+  buf[len]=' '; ++len;
+  len+=fmt_ulongpadright(buf+len,meminfo[3].val,10);
+  buf[len]='\n'; ++len;
+
+  len += fmt_str (buf+len, "-/+ buffers/cache: ");
+  {
+    int bc = meminfo[2].val + meminfo[3].val;
+    len+=fmt_ulongpadright(buf+len,meminfo[0].val - meminfo[1].val - bc,10);
+    buf[len]=' '; ++len;
+    len+=fmt_ulongpadright(buf+len,meminfo[2].val + bc,10);
+    buf[len]='\n'; ++len;
+  }
+
+  len+=fmt_str (buf+len, "Swap:   ");
+  len+=fmt_ulongpadright(buf+len,meminfo[4].val,10);
+  buf[len]=' '; ++len;
+  len+=fmt_ulongpadright(buf+len,meminfo[4].val - meminfo[5].val,10);
+  buf[len]=' '; ++len;
+  len+=fmt_ulongpadright(buf+len,meminfo[5].val,10);
+  buf[len] = 0;
+  puts(buf);
+
+  return 0;
+}